mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-03-17 00:01:54 +08:00
rtl.h (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
* rtl.h (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
* alias.c (true_dependence): Update to match new semantics.
(canon_true_dependence, write_dependence_p): Likewise.
(anti_dependence, output_dependence): Update write_dependence_p args.
(unchanging_anti_dependence): Remove.
* calls.c (purge_mem_unchanging_flag): Remove.
(fixup_tail_calls): Don't call it.
(expand_call): Don't add unchanging memory to function usage.
* expr.c (emit_block_move_via_libcall): Likewise.
(clear_storage_via_libcall): Don't clobber RTX_UNCHANGING_P mems.
(get_subtarget): Don't use RTX_UNCHANGING_P.
(expand_assignment, store_constructor, expand_expr_real_1): Likewise.
(do_tablejump): Set MEM_READONLY_P, not RTX_UNCHANGING_P.
* combine.c (get_last_value_validate): Use MEM_READONLY_P.
* cse.c (insert): Don't use RTX_UNCHANGING_P.
(cse_insn, canon_hash): Use MEM_READONLY_P.
* emit-rtl.c (set_mem_attributes_minus_bitpos): Use MEM_READONLY_P
instead of RTX_UNCHANGING_P.
* explow.c (maybe_set_unchanging): Remove.
* expr.h (maybe_set_unchanging): Remove.
* flow.c (insn_dead_p, mark_used_regs): Use anti_dependence.
* function.c (assign_stack_temp_for_type): Don't use RTX_UNCHANGING_P.
(assign_parm_setup_reg, expand_function_start): Likewise.
* integrate.c (copy_rtx_and_substitute): Likewise.
* ra-rewrite.c (emit_colors): Likewise.
* regmove.c (copy_src_to_dest, regmove_optimize): Likewise.
(fixup_match_1): Likewise.
* reload1.c (reload, alter_reg): Likewise.
* local-alloc.c (validate_equiv_mem): Check MEM_READONLY_P,
not RTX_UNCHANGING_P.
(equiv_init_varies_p): Likewise.
* loop-invariant.c (check_maybe_invariant): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources): Likewise.
* loop.c (note_addr_stored): Likewise.
(prescan_loop): Likewise. Don't check function usage for clobbered
unchanging memory.
* rtlanal.c (rtx_unstable_p): Check MEM_READONLY_P,
not RTX_UNCHANGING_P.
(rtx_varies_p, modified_between_p, modified_in_p): Likewise.
* varasm.c (force_const_mem): Likewise.
* stmt.c (expand_decl): Don't set RTX_UNCHANGING_P.
* web.c (entry_register): Likewise.
* tree-gimple.h (get_base_address): Move decl ...
* tree.h: ... here.
* doc/rtl.texi (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
* config/alpha/alpha.c (alpha_set_memflags_1): Rewrite to be
called via for_each_rtx. Copy MEM_SCALAR_P, MEM_NOTRAP_P too.
(alpha_set_memflags): Update to match.
* config/darwin.c (machopic_indirect_data_reference): Set
MEM_READONLY_P instead of RTX_UNCHANGING_P.
(machopic_indirect_call_target): Likewise.
(machopic_legitimize_pic_address): Likewise.
* config/arm/arm.c (legitimize_pic_address, arm_gen_load_multiple,
arm_gen_store_multiple, arm_gen_movmemqi): Likewise.
* config/arm/arm.md (load_multiple, store_multiple): Likewise.
* config/frv/frv.md (symGOT2reg): Likewise.
* config/i386/i386.c (legitimize_pic_address,
legitimize_tls_address, ix86_split_to_parts): Likewise.
* config/ia64/ia64.c (ia64_expand_tls_address): Likewise.
* config/ia64/ia64.md (load_fptr): Likewise.
* config/m32r/m32r.c (m32r_legitimize_pic_address): Likewise.
* config/m68k/m68k.c (legitimize_pic_address): Likewise.
* config/mcore/mcore.c (block_move_sequence): Likewise.
* config/mn10300/mn10300.md (symGOT2reg): Likewise.
* config/pa/pa.c (legitimize_pic_address): Likewise.
* config/rs6000/rs6000.c (rs6000_legitimize_tls_address): Likewise.
(rs6000_emit_move): Likewise.
* config/s390/s390.c (legitimize_pic_address): Likewise.
(legitimize_tls_address): Likewise.
* config/s390/s390.md (casesi): Likewise.
* config/sh/sh.c (prepare_move_operands, sh_reorg): Likewise.
* config/sh/sh.md (symGOT2reg): Likewise.
* config/sparc/sparc.c (legitimize_pic_address): Likewise.
* config/v850/v850.md (casesi): Likewise.
* config/ia64/ia64.c (gen_thread_pointer): Don't set RTX_UNCHANGING_P.
* config/iq2000/iq2000.c (save_restore_insns): Likewise.
* config/mips/mips.c (mips_restore_gp): Likewise.
(mips_save_restore_reg, mips16_gp_pseudo_reg): Likewise.
* config/sh/sh.c (sh_reorg): Likewise.
From-SVN: r86178
This commit is contained in:
Richard Henderson
Richard Henderson
parent
17ad5b5ec2
commit
389fdba06a
@ -1,3 +1,88 @@
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2004-08-18 Richard Henderson <rth@redhat.com>
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* rtl.h (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
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* alias.c (true_dependence): Update to match new semantics.
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(canon_true_dependence, write_dependence_p): Likewise.
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(anti_dependence, output_dependence): Update write_dependence_p args.
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(unchanging_anti_dependence): Remove.
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* calls.c (purge_mem_unchanging_flag): Remove.
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(fixup_tail_calls): Don't call it.
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(expand_call): Don't add unchanging memory to function usage.
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* expr.c (emit_block_move_via_libcall): Likewise.
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(clear_storage_via_libcall): Don't clobber RTX_UNCHANGING_P mems.
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(get_subtarget): Don't use RTX_UNCHANGING_P.
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(expand_assignment, store_constructor, expand_expr_real_1): Likewise.
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(do_tablejump): Set MEM_READONLY_P, not RTX_UNCHANGING_P.
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* combine.c (get_last_value_validate): Use MEM_READONLY_P.
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* cse.c (insert): Don't use RTX_UNCHANGING_P.
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(cse_insn, canon_hash): Use MEM_READONLY_P.
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* emit-rtl.c (set_mem_attributes_minus_bitpos): Use MEM_READONLY_P
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instead of RTX_UNCHANGING_P.
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* explow.c (maybe_set_unchanging): Remove.
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* expr.h (maybe_set_unchanging): Remove.
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* flow.c (insn_dead_p, mark_used_regs): Use anti_dependence.
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* function.c (assign_stack_temp_for_type): Don't use RTX_UNCHANGING_P.
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(assign_parm_setup_reg, expand_function_start): Likewise.
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* integrate.c (copy_rtx_and_substitute): Likewise.
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* ra-rewrite.c (emit_colors): Likewise.
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* regmove.c (copy_src_to_dest, regmove_optimize): Likewise.
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(fixup_match_1): Likewise.
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* reload1.c (reload, alter_reg): Likewise.
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* local-alloc.c (validate_equiv_mem): Check MEM_READONLY_P,
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not RTX_UNCHANGING_P.
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(equiv_init_varies_p): Likewise.
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* loop-invariant.c (check_maybe_invariant): Likewise.
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* resource.c (mark_referenced_resources, mark_set_resources): Likewise.
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* loop.c (note_addr_stored): Likewise.
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(prescan_loop): Likewise. Don't check function usage for clobbered
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unchanging memory.
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* rtlanal.c (rtx_unstable_p): Check MEM_READONLY_P,
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not RTX_UNCHANGING_P.
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(rtx_varies_p, modified_between_p, modified_in_p): Likewise.
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* varasm.c (force_const_mem): Likewise.
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* stmt.c (expand_decl): Don't set RTX_UNCHANGING_P.
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* web.c (entry_register): Likewise.
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* tree-gimple.h (get_base_address): Move decl ...
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* tree.h: ... here.
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* doc/rtl.texi (MEM_READONLY_P): Replace RTX_UNCHANGING_P.
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* config/alpha/alpha.c (alpha_set_memflags_1): Rewrite to be
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called via for_each_rtx. Copy MEM_SCALAR_P, MEM_NOTRAP_P too.
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(alpha_set_memflags): Update to match.
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* config/darwin.c (machopic_indirect_data_reference): Set
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MEM_READONLY_P instead of RTX_UNCHANGING_P.
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(machopic_indirect_call_target): Likewise.
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(machopic_legitimize_pic_address): Likewise.
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* config/arm/arm.c (legitimize_pic_address, arm_gen_load_multiple,
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arm_gen_store_multiple, arm_gen_movmemqi): Likewise.
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* config/arm/arm.md (load_multiple, store_multiple): Likewise.
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* config/frv/frv.md (symGOT2reg): Likewise.
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* config/i386/i386.c (legitimize_pic_address,
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legitimize_tls_address, ix86_split_to_parts): Likewise.
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* config/ia64/ia64.c (ia64_expand_tls_address): Likewise.
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* config/ia64/ia64.md (load_fptr): Likewise.
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* config/m32r/m32r.c (m32r_legitimize_pic_address): Likewise.
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* config/m68k/m68k.c (legitimize_pic_address): Likewise.
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* config/mcore/mcore.c (block_move_sequence): Likewise.
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* config/mn10300/mn10300.md (symGOT2reg): Likewise.
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* config/pa/pa.c (legitimize_pic_address): Likewise.
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* config/rs6000/rs6000.c (rs6000_legitimize_tls_address): Likewise.
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(rs6000_emit_move): Likewise.
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* config/s390/s390.c (legitimize_pic_address): Likewise.
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(legitimize_tls_address): Likewise.
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* config/s390/s390.md (casesi): Likewise.
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* config/sh/sh.c (prepare_move_operands, sh_reorg): Likewise.
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* config/sh/sh.md (symGOT2reg): Likewise.
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* config/sparc/sparc.c (legitimize_pic_address): Likewise.
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* config/v850/v850.md (casesi): Likewise.
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* config/ia64/ia64.c (gen_thread_pointer): Don't set RTX_UNCHANGING_P.
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* config/iq2000/iq2000.c (save_restore_insns): Likewise.
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* config/mips/mips.c (mips_restore_gp): Likewise.
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(mips_save_restore_reg, mips16_gp_pseudo_reg): Likewise.
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* config/sh/sh.c (sh_reorg): Likewise.
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2004-08-18 Richard Henderson <rth@redhat.com>
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* tree.h (struct tree_decl): Add gimple_formal_temp.
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62
gcc/alias.c
62
gcc/alias.c
@ -113,7 +113,7 @@ static bool nonoverlapping_component_refs_p (tree, tree);
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static tree decl_for_component_ref (tree);
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static rtx adjust_offset_for_component_ref (tree, rtx);
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static int nonoverlapping_memrefs_p (rtx, rtx);
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static int write_dependence_p (rtx, rtx, int, int);
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static int write_dependence_p (rtx, rtx, int);
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static int nonlocal_mentioned_p_1 (rtx *, void *);
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static int nonlocal_mentioned_p (rtx);
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@ -2173,17 +2173,10 @@ true_dependence (rtx mem, enum machine_mode mem_mode, rtx x,
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if (DIFFERENT_ALIAS_SETS_P (x, mem))
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return 0;
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/* Unchanging memory can't conflict with non-unchanging memory.
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A non-unchanging read can conflict with a non-unchanging write.
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An unchanging read can conflict with an unchanging write since
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there may be a single store to this address to initialize it.
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Note that an unchanging store can conflict with a non-unchanging read
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since we have to make conservative assumptions when we have a
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record with readonly fields and we are copying the whole thing.
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Just fall through to the code below to resolve potential conflicts.
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This won't handle all cases optimally, but the possible performance
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loss should be negligible. */
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if (RTX_UNCHANGING_P (x) && ! RTX_UNCHANGING_P (mem))
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/* Read-only memory is by definition never modified, and therefore can't
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conflict with anything. We don't expect to find read-only set on MEM,
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but stupid user tricks can produce them, so don't abort. */
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if (MEM_READONLY_P (x))
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return 0;
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if (nonoverlapping_memrefs_p (mem, x))
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@ -2253,14 +2246,10 @@ canon_true_dependence (rtx mem, enum machine_mode mem_mode, rtx mem_addr,
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if (DIFFERENT_ALIAS_SETS_P (x, mem))
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return 0;
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/* If X is an unchanging read, then it can't possibly conflict with any
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non-unchanging store. It may conflict with an unchanging write though,
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because there may be a single store to this address to initialize it.
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Just fall through to the code below to resolve the case where we have
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both an unchanging read and an unchanging write. This won't handle all
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cases optimally, but the possible performance loss should be
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negligible. */
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if (RTX_UNCHANGING_P (x) && ! RTX_UNCHANGING_P (mem))
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/* Read-only memory is by definition never modified, and therefore can't
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conflict with anything. We don't expect to find read-only set on MEM,
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but stupid user tricks can produce them, so don't abort. */
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if (MEM_READONLY_P (x))
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return 0;
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if (nonoverlapping_memrefs_p (x, mem))
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@ -2294,11 +2283,10 @@ canon_true_dependence (rtx mem, enum machine_mode mem_mode, rtx mem_addr,
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}
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/* Returns nonzero if a write to X might alias a previous read from
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(or, if WRITEP is nonzero, a write to) MEM. If CONSTP is nonzero,
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honor the RTX_UNCHANGING_P flags on X and MEM. */
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(or, if WRITEP is nonzero, a write to) MEM. */
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static int
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write_dependence_p (rtx mem, rtx x, int writep, int constp)
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write_dependence_p (rtx mem, rtx x, int writep)
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{
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rtx x_addr, mem_addr;
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rtx fixed_scalar;
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@ -2317,18 +2305,9 @@ write_dependence_p (rtx mem, rtx x, int writep, int constp)
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if (DIFFERENT_ALIAS_SETS_P (x, mem))
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return 0;
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if (constp)
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{
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/* Unchanging memory can't conflict with non-unchanging memory. */
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if (RTX_UNCHANGING_P (x) != RTX_UNCHANGING_P (mem))
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return 0;
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/* If MEM is an unchanging read, then it can't possibly conflict with
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the store to X, because there is at most one store to MEM, and it
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must have occurred somewhere before MEM. */
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if (! writep && RTX_UNCHANGING_P (mem))
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return 0;
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}
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/* A read from read-only memory can't conflict with read-write memory. */
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if (!writep && MEM_READONLY_P (mem))
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return 0;
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if (nonoverlapping_memrefs_p (x, mem))
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return 0;
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@ -2369,7 +2348,7 @@ write_dependence_p (rtx mem, rtx x, int writep, int constp)
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int
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anti_dependence (rtx mem, rtx x)
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{
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return write_dependence_p (mem, x, /*writep=*/0, /*constp*/1);
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return write_dependence_p (mem, x, /*writep=*/0);
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}
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/* Output dependence: X is written after store in MEM takes place. */
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@ -2377,16 +2356,7 @@ anti_dependence (rtx mem, rtx x)
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int
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output_dependence (rtx mem, rtx x)
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{
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return write_dependence_p (mem, x, /*writep=*/1, /*constp*/1);
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}
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/* Unchanging anti dependence: Like anti_dependence but ignores
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the UNCHANGING_RTX_P property on const variable references. */
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int
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unchanging_anti_dependence (rtx mem, rtx x)
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{
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return write_dependence_p (mem, x, /*writep=*/0, /*constp*/0);
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return write_dependence_p (mem, x, /*writep=*/1);
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}
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/* A subroutine of nonlocal_mentioned_p, returns 1 if *LOC mentions
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80
gcc/calls.c
80
gcc/calls.c
@ -1785,45 +1785,6 @@ purge_reg_equiv_notes (void)
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}
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}
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/* Clear RTX_UNCHANGING_P flag of incoming argument MEMs. */
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static void
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purge_mem_unchanging_flag (rtx x)
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{
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RTX_CODE code;
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int i, j;
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const char *fmt;
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if (x == NULL_RTX)
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return;
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code = GET_CODE (x);
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if (code == MEM)
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{
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if (RTX_UNCHANGING_P (x)
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&& (XEXP (x, 0) == current_function_internal_arg_pointer
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|| (GET_CODE (XEXP (x, 0)) == PLUS
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&& XEXP (XEXP (x, 0), 0) ==
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current_function_internal_arg_pointer
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&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT)))
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RTX_UNCHANGING_P (x) = 0;
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return;
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}
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/* Scan all subexpressions. */
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fmt = GET_RTX_FORMAT (code);
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for (i = 0; i < GET_RTX_LENGTH (code); i++, fmt++)
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{
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if (*fmt == 'e')
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purge_mem_unchanging_flag (XEXP (x, i));
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else if (*fmt == 'E')
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for (j = 0; j < XVECLEN (x, i); j++)
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purge_mem_unchanging_flag (XVECEXP (x, i, j));
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}
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}
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/* Generate all the code for a function call
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and return an rtx for its value.
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Store the value in TARGET (specified as an rtx) if convenient.
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@ -3004,22 +2965,6 @@ expand_call (tree exp, rtx target, int ignore)
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if (args[i].aligned_regs)
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free (args[i].aligned_regs);
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/* If this function is returning into a memory location marked as
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readonly, it means it is initializing that location. We normally treat
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functions as not clobbering such locations, so we need to specify that
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this one does. We do this by adding the appropriate CLOBBER to the
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CALL_INSN function usage list. This cannot be done by emitting a
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standalone CLOBBER after the call because the latter would be ignored
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by at least the delay slot scheduling pass. We do this now instead of
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adding to call_fusage before the call to emit_call_1 because TARGET
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may be modified in the meantime. */
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if (structure_value_addr != 0 && target != 0
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&& MEM_P (target) && RTX_UNCHANGING_P (target))
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add_function_usage_to
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(last_call_insn (),
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gen_rtx_EXPR_LIST (VOIDmode, gen_rtx_CLOBBER (VOIDmode, target),
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NULL_RTX));
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insns = get_insns ();
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end_sequence ();
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@ -3100,32 +3045,7 @@ expand_call (tree exp, rtx target, int ignore)
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void
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fixup_tail_calls (void)
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{
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rtx insn;
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tree arg;
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purge_reg_equiv_notes ();
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/* A sibling call sequence also may invalidate RTX_UNCHANGING_P
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flag of some incoming arguments MEM RTLs, because it can write into
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those slots. We clear all those bits now.
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This is (slight) overkill, we could keep track of which arguments
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we actually write into. */
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for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
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{
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if (INSN_P (insn))
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purge_mem_unchanging_flag (PATTERN (insn));
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}
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/* Similarly, invalidate RTX_UNCHANGING_P for any incoming
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arguments passed in registers. */
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for (arg = DECL_ARGUMENTS (current_function_decl);
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arg;
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arg = TREE_CHAIN (arg))
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{
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if (REG_P (DECL_RTL (arg)))
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RTX_UNCHANGING_P (DECL_RTL (arg)) = false;
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}
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}
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/* Traverse an argument list in VALUES and expand all complex
|
||||
|
||||
@ -11053,7 +11053,7 @@ get_last_value_validate (rtx *loc, rtx insn, int tick, int replace)
|
||||
/* If this is a memory reference, make sure that there were
|
||||
no stores after it that might have clobbered the value. We don't
|
||||
have alias info, so we assume any store invalidates it. */
|
||||
else if (MEM_P (x) && ! RTX_UNCHANGING_P (x)
|
||||
else if (MEM_P (x) && !MEM_READONLY_P (x)
|
||||
&& INSN_CUID (insn) <= mem_last_set)
|
||||
{
|
||||
if (replace)
|
||||
|
||||
@ -1589,48 +1589,27 @@ secondary_reload_class (enum reg_class class, enum machine_mode mode,
|
||||
/* Subfunction of the following function. Update the flags of any MEM
|
||||
found in part of X. */
|
||||
|
||||
static void
|
||||
alpha_set_memflags_1 (rtx x, int in_struct_p, int volatile_p, int unchanging_p)
|
||||
static int
|
||||
alpha_set_memflags_1 (rtx *xp, void *data)
|
||||
{
|
||||
int i;
|
||||
rtx x = *xp, orig = (rtx) data;
|
||||
|
||||
switch (GET_CODE (x))
|
||||
{
|
||||
case SEQUENCE:
|
||||
abort ();
|
||||
if (GET_CODE (x) != MEM)
|
||||
return 0;
|
||||
|
||||
case PARALLEL:
|
||||
for (i = XVECLEN (x, 0) - 1; i >= 0; i--)
|
||||
alpha_set_memflags_1 (XVECEXP (x, 0, i), in_struct_p, volatile_p,
|
||||
unchanging_p);
|
||||
break;
|
||||
MEM_VOLATILE_P (x) = MEM_VOLATILE_P (orig);
|
||||
MEM_IN_STRUCT_P (x) = MEM_IN_STRUCT_P (orig);
|
||||
MEM_SCALAR_P (x) = MEM_SCALAR_P (orig);
|
||||
MEM_NOTRAP_P (x) = MEM_NOTRAP_P (orig);
|
||||
MEM_READONLY_P (x) = MEM_READONLY_P (orig);
|
||||
|
||||
case INSN:
|
||||
alpha_set_memflags_1 (PATTERN (x), in_struct_p, volatile_p,
|
||||
unchanging_p);
|
||||
break;
|
||||
/* Sadly, we cannot use alias sets because the extra aliasing
|
||||
produced by the AND interferes. Given that two-byte quantities
|
||||
are the only thing we would be able to differentiate anyway,
|
||||
there does not seem to be any point in convoluting the early
|
||||
out of the alias check. */
|
||||
|
||||
case SET:
|
||||
alpha_set_memflags_1 (SET_DEST (x), in_struct_p, volatile_p,
|
||||
unchanging_p);
|
||||
alpha_set_memflags_1 (SET_SRC (x), in_struct_p, volatile_p,
|
||||
unchanging_p);
|
||||
break;
|
||||
|
||||
case MEM:
|
||||
MEM_IN_STRUCT_P (x) = in_struct_p;
|
||||
MEM_VOLATILE_P (x) = volatile_p;
|
||||
RTX_UNCHANGING_P (x) = unchanging_p;
|
||||
/* Sadly, we cannot use alias sets because the extra aliasing
|
||||
produced by the AND interferes. Given that two-byte quantities
|
||||
are the only thing we would be able to differentiate anyway,
|
||||
there does not seem to be any point in convoluting the early
|
||||
out of the alias check. */
|
||||
break;
|
||||
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Given INSN, which is an INSN list or the PATTERN of a single insn
|
||||
@ -1642,22 +1621,26 @@ alpha_set_memflags_1 (rtx x, int in_struct_p, int volatile_p, int unchanging_p)
|
||||
void
|
||||
alpha_set_memflags (rtx insn, rtx ref)
|
||||
{
|
||||
int in_struct_p, volatile_p, unchanging_p;
|
||||
rtx *base_ptr;
|
||||
|
||||
if (GET_CODE (ref) != MEM)
|
||||
return;
|
||||
|
||||
in_struct_p = MEM_IN_STRUCT_P (ref);
|
||||
volatile_p = MEM_VOLATILE_P (ref);
|
||||
unchanging_p = RTX_UNCHANGING_P (ref);
|
||||
|
||||
/* This is only called from alpha.md, after having had something
|
||||
generated from one of the insn patterns. So if everything is
|
||||
zero, the pattern is already up-to-date. */
|
||||
if (! in_struct_p && ! volatile_p && ! unchanging_p)
|
||||
if (!MEM_VOLATILE_P (ref)
|
||||
&& !MEM_IN_STRUCT_P (ref)
|
||||
&& !MEM_SCALAR_P (ref)
|
||||
&& !MEM_NOTRAP_P (ref)
|
||||
&& !MEM_READONLY_P (ref))
|
||||
return;
|
||||
|
||||
alpha_set_memflags_1 (insn, in_struct_p, volatile_p, unchanging_p);
|
||||
if (INSN_P (insn))
|
||||
base_ptr = &PATTERN (insn);
|
||||
else
|
||||
base_ptr = &insn;
|
||||
for_each_rtx (base_ptr, alpha_set_memflags_1, (void *) ref);
|
||||
}
|
||||
|
||||
/* Internal routine for alpha_emit_set_const to check for N or below insns. */
|
||||
|
||||
@ -2924,7 +2924,7 @@ legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
pic_ref = gen_rtx_MEM (Pmode,
|
||||
gen_rtx_PLUS (Pmode, pic_offset_table_rtx,
|
||||
address));
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
}
|
||||
|
||||
insn = emit_move_insn (reg, pic_ref);
|
||||
@ -5939,7 +5939,7 @@ arm_gen_load_multiple (int base_regno, int count, rtx from, int up,
|
||||
for (i = 0; i < count; i++)
|
||||
{
|
||||
mem = gen_rtx_MEM (SImode, plus_constant (from, i * 4 * sign));
|
||||
RTX_UNCHANGING_P (mem) = unchanging_p;
|
||||
MEM_READONLY_P (mem) = unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = in_struct_p;
|
||||
MEM_SCALAR_P (mem) = scalar_p;
|
||||
emit_move_insn (gen_rtx_REG (SImode, base_regno + i), mem);
|
||||
@ -5968,7 +5968,7 @@ arm_gen_load_multiple (int base_regno, int count, rtx from, int up,
|
||||
for (j = 0; i < count; i++, j++)
|
||||
{
|
||||
mem = gen_rtx_MEM (SImode, plus_constant (from, j * 4 * sign));
|
||||
RTX_UNCHANGING_P (mem) = unchanging_p;
|
||||
MEM_READONLY_P (mem) = unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = in_struct_p;
|
||||
MEM_SCALAR_P (mem) = scalar_p;
|
||||
XVECEXP (result, 0, i)
|
||||
@ -5999,7 +5999,7 @@ arm_gen_store_multiple (int base_regno, int count, rtx to, int up,
|
||||
for (i = 0; i < count; i++)
|
||||
{
|
||||
mem = gen_rtx_MEM (SImode, plus_constant (to, i * 4 * sign));
|
||||
RTX_UNCHANGING_P (mem) = unchanging_p;
|
||||
MEM_READONLY_P (mem) = unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = in_struct_p;
|
||||
MEM_SCALAR_P (mem) = scalar_p;
|
||||
emit_move_insn (mem, gen_rtx_REG (SImode, base_regno + i));
|
||||
@ -6028,7 +6028,7 @@ arm_gen_store_multiple (int base_regno, int count, rtx to, int up,
|
||||
for (j = 0; i < count; i++, j++)
|
||||
{
|
||||
mem = gen_rtx_MEM (SImode, plus_constant (to, j * 4 * sign));
|
||||
RTX_UNCHANGING_P (mem) = unchanging_p;
|
||||
MEM_READONLY_P (mem) = unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = in_struct_p;
|
||||
MEM_SCALAR_P (mem) = scalar_p;
|
||||
|
||||
@ -6060,10 +6060,10 @@ arm_gen_movmemqi (rtx *operands)
|
||||
st_dst = XEXP (operands[0], 0);
|
||||
st_src = XEXP (operands[1], 0);
|
||||
|
||||
dst_unchanging_p = RTX_UNCHANGING_P (operands[0]);
|
||||
dst_unchanging_p = MEM_READONLY_P (operands[0]);
|
||||
dst_in_struct_p = MEM_IN_STRUCT_P (operands[0]);
|
||||
dst_scalar_p = MEM_SCALAR_P (operands[0]);
|
||||
src_unchanging_p = RTX_UNCHANGING_P (operands[1]);
|
||||
src_unchanging_p = MEM_READONLY_P (operands[1]);
|
||||
src_in_struct_p = MEM_IN_STRUCT_P (operands[1]);
|
||||
src_scalar_p = MEM_SCALAR_P (operands[1]);
|
||||
|
||||
@ -6107,7 +6107,7 @@ arm_gen_movmemqi (rtx *operands)
|
||||
else
|
||||
{
|
||||
mem = gen_rtx_MEM (SImode, dst);
|
||||
RTX_UNCHANGING_P (mem) = dst_unchanging_p;
|
||||
MEM_READONLY_P (mem) = dst_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = dst_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = dst_scalar_p;
|
||||
emit_move_insn (mem, gen_rtx_REG (SImode, 0));
|
||||
@ -6126,14 +6126,14 @@ arm_gen_movmemqi (rtx *operands)
|
||||
rtx sreg;
|
||||
|
||||
mem = gen_rtx_MEM (SImode, src);
|
||||
RTX_UNCHANGING_P (mem) = src_unchanging_p;
|
||||
MEM_READONLY_P (mem) = src_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = src_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = src_scalar_p;
|
||||
emit_move_insn (sreg = gen_reg_rtx (SImode), mem);
|
||||
emit_move_insn (fin_src = gen_reg_rtx (SImode), plus_constant (src, 4));
|
||||
|
||||
mem = gen_rtx_MEM (SImode, dst);
|
||||
RTX_UNCHANGING_P (mem) = dst_unchanging_p;
|
||||
MEM_READONLY_P (mem) = dst_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = dst_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = dst_scalar_p;
|
||||
emit_move_insn (mem, sreg);
|
||||
@ -6150,7 +6150,7 @@ arm_gen_movmemqi (rtx *operands)
|
||||
abort ();
|
||||
|
||||
mem = gen_rtx_MEM (SImode, src);
|
||||
RTX_UNCHANGING_P (mem) = src_unchanging_p;
|
||||
MEM_READONLY_P (mem) = src_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = src_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = src_scalar_p;
|
||||
part_bytes_reg = copy_to_mode_reg (SImode, mem);
|
||||
@ -6171,7 +6171,7 @@ arm_gen_movmemqi (rtx *operands)
|
||||
while (last_bytes)
|
||||
{
|
||||
mem = gen_rtx_MEM (QImode, plus_constant (dst, last_bytes - 1));
|
||||
RTX_UNCHANGING_P (mem) = dst_unchanging_p;
|
||||
MEM_READONLY_P (mem) = dst_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = dst_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = dst_scalar_p;
|
||||
emit_move_insn (mem, gen_lowpart (QImode, part_bytes_reg));
|
||||
@ -6190,7 +6190,7 @@ arm_gen_movmemqi (rtx *operands)
|
||||
if (last_bytes > 1)
|
||||
{
|
||||
mem = gen_rtx_MEM (HImode, dst);
|
||||
RTX_UNCHANGING_P (mem) = dst_unchanging_p;
|
||||
MEM_READONLY_P (mem) = dst_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = dst_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = dst_scalar_p;
|
||||
emit_move_insn (mem, gen_lowpart (HImode, part_bytes_reg));
|
||||
@ -6208,7 +6208,7 @@ arm_gen_movmemqi (rtx *operands)
|
||||
if (last_bytes)
|
||||
{
|
||||
mem = gen_rtx_MEM (QImode, dst);
|
||||
RTX_UNCHANGING_P (mem) = dst_unchanging_p;
|
||||
MEM_READONLY_P (mem) = dst_unchanging_p;
|
||||
MEM_IN_STRUCT_P (mem) = dst_in_struct_p;
|
||||
MEM_SCALAR_P (mem) = dst_scalar_p;
|
||||
emit_move_insn (mem, gen_lowpart (QImode, part_bytes_reg));
|
||||
|
||||
@ -5258,8 +5258,8 @@
|
||||
operands[3]
|
||||
= arm_gen_load_multiple (REGNO (operands[0]), INTVAL (operands[2]),
|
||||
force_reg (SImode, XEXP (operands[1], 0)),
|
||||
TRUE, FALSE, RTX_UNCHANGING_P(operands[1]),
|
||||
MEM_IN_STRUCT_P(operands[1]),
|
||||
TRUE, FALSE, MEM_READONLY_P (operands[1]),
|
||||
MEM_IN_STRUCT_P (operands[1]),
|
||||
MEM_SCALAR_P (operands[1]));
|
||||
"
|
||||
)
|
||||
@ -5380,8 +5380,8 @@
|
||||
operands[3]
|
||||
= arm_gen_store_multiple (REGNO (operands[1]), INTVAL (operands[2]),
|
||||
force_reg (SImode, XEXP (operands[0], 0)),
|
||||
TRUE, FALSE, RTX_UNCHANGING_P (operands[0]),
|
||||
MEM_IN_STRUCT_P(operands[0]),
|
||||
TRUE, FALSE, MEM_READONLY_P (operands[0]),
|
||||
MEM_IN_STRUCT_P (operands[0]),
|
||||
MEM_SCALAR_P (operands[0]));
|
||||
"
|
||||
)
|
||||
|
||||
@ -385,7 +385,7 @@ machopic_indirect_data_reference (rtx orig, rtx reg)
|
||||
SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig);
|
||||
|
||||
ptr_ref = gen_rtx_MEM (Pmode, ptr_ref);
|
||||
RTX_UNCHANGING_P (ptr_ref) = 1;
|
||||
MEM_READONLY_P (ptr_ref) = 1;
|
||||
|
||||
return ptr_ref;
|
||||
}
|
||||
@ -469,7 +469,7 @@ machopic_indirect_call_target (rtx target)
|
||||
|
||||
XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name);
|
||||
SYMBOL_REF_DECL (XEXP (target, 0)) = decl;
|
||||
RTX_UNCHANGING_P (target) = 1;
|
||||
MEM_READONLY_P (target) = 1;
|
||||
}
|
||||
|
||||
return target;
|
||||
@ -532,7 +532,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
emit_insn (gen_macho_high (temp_reg, asym));
|
||||
mem = gen_rtx_MEM (GET_MODE (orig),
|
||||
gen_rtx_LO_SUM (Pmode, temp_reg, asym));
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
MEM_READONLY_P (mem) = 1;
|
||||
emit_insn (gen_rtx_SET (VOIDmode, reg, mem));
|
||||
#else
|
||||
/* Some other CPU -- WriteMe! but right now there are no other platform that can use dynamic-no-pic */
|
||||
@ -565,7 +565,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
mem = gen_rtx_MEM (GET_MODE (orig),
|
||||
gen_rtx_LO_SUM (Pmode,
|
||||
hi_sum_reg, offset));
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
MEM_READONLY_P (mem) = 1;
|
||||
insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem));
|
||||
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref,
|
||||
REG_NOTES (insn));
|
||||
@ -614,7 +614,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
emit_move_insn (reg, pic_ref);
|
||||
pic_ref = gen_rtx_MEM (GET_MODE (orig), reg);
|
||||
#endif
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
}
|
||||
else
|
||||
{
|
||||
@ -650,7 +650,6 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
gen_rtx_LO_SUM (Pmode,
|
||||
hi_sum_reg, offset)));
|
||||
pic_ref = reg;
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
#else
|
||||
emit_insn (gen_rtx_SET (VOIDmode, reg,
|
||||
gen_rtx_HIGH (Pmode, offset)));
|
||||
@ -658,7 +657,6 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
gen_rtx_LO_SUM (Pmode, reg, offset)));
|
||||
pic_ref = gen_rtx_PLUS (Pmode,
|
||||
pic_offset_table_rtx, reg);
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
#endif
|
||||
}
|
||||
else
|
||||
@ -732,9 +730,6 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
else
|
||||
pic_ref = gen_rtx_PLUS (Pmode, base, orig);
|
||||
|
||||
if (RTX_UNCHANGING_P (base) && RTX_UNCHANGING_P (orig))
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
|
||||
if (reg && is_complex)
|
||||
{
|
||||
emit_move_insn (reg, pic_ref);
|
||||
@ -752,9 +747,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
&& GET_CODE (XEXP (orig, 0)) == SYMBOL_REF)
|
||||
{
|
||||
rtx addr = machopic_legitimize_pic_address (XEXP (orig, 0), Pmode, reg);
|
||||
|
||||
addr = gen_rtx_MEM (GET_MODE (orig), addr);
|
||||
RTX_UNCHANGING_P (addr) = RTX_UNCHANGING_P (orig);
|
||||
addr = replace_equiv_address (orig, addr);
|
||||
emit_move_insn (reg, addr);
|
||||
pic_ref = reg;
|
||||
}
|
||||
|
||||
@ -7719,7 +7719,7 @@
|
||||
|
||||
insn = emit_insn (gen_symGOT2reg_i (operands[0], operands[1], operands[2], operands[3]));
|
||||
|
||||
RTX_UNCHANGING_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
MEM_READONLY_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
|
||||
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, operands[1],
|
||||
REG_NOTES (insn));
|
||||
|
||||
@ -5307,7 +5307,7 @@ legitimize_pic_address (rtx orig, rtx reg)
|
||||
new = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, addr), UNSPEC_GOTPCREL);
|
||||
new = gen_rtx_CONST (Pmode, new);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
set_mem_alias_set (new, ix86_GOT_alias_set ());
|
||||
|
||||
if (reg == 0)
|
||||
@ -5329,7 +5329,7 @@ legitimize_pic_address (rtx orig, rtx reg)
|
||||
new = gen_rtx_CONST (Pmode, new);
|
||||
new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, new);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
set_mem_alias_set (new, ix86_GOT_alias_set ());
|
||||
|
||||
if (reg == 0)
|
||||
@ -5509,7 +5509,7 @@ legitimize_tls_address (rtx x, enum tls_model model, int for_mov)
|
||||
if (pic)
|
||||
off = gen_rtx_PLUS (Pmode, pic, off);
|
||||
off = gen_rtx_MEM (Pmode, off);
|
||||
RTX_UNCHANGING_P (off) = 1;
|
||||
MEM_READONLY_P (off) = 1;
|
||||
set_mem_alias_set (off, ix86_GOT_alias_set ());
|
||||
|
||||
if (TARGET_64BIT || TARGET_GNU_TLS)
|
||||
@ -9552,7 +9552,7 @@ ix86_split_to_parts (rtx operand, rtx *parts, enum machine_mode mode)
|
||||
|
||||
/* Optimize constant pool reference to immediates. This is used by fp
|
||||
moves, that force all constants to memory to allow combining. */
|
||||
if (GET_CODE (operand) == MEM && RTX_UNCHANGING_P (operand))
|
||||
if (GET_CODE (operand) == MEM && MEM_READONLY_P (operand))
|
||||
{
|
||||
rtx tmp = maybe_get_pool_constant (operand);
|
||||
if (tmp)
|
||||
|
||||
@ -669,10 +669,7 @@ static rtx
|
||||
gen_thread_pointer (void)
|
||||
{
|
||||
if (!thread_pointer_rtx)
|
||||
{
|
||||
thread_pointer_rtx = gen_rtx_REG (Pmode, 13);
|
||||
RTX_UNCHANGING_P (thread_pointer_rtx) = 1;
|
||||
}
|
||||
thread_pointer_rtx = gen_rtx_REG (Pmode, 13);
|
||||
return thread_pointer_rtx;
|
||||
}
|
||||
|
||||
@ -690,12 +687,12 @@ ia64_expand_tls_address (enum tls_model tls_kind, rtx op0, rtx op1)
|
||||
tga_op1 = gen_reg_rtx (Pmode);
|
||||
emit_insn (gen_load_ltoff_dtpmod (tga_op1, op1));
|
||||
tga_op1 = gen_rtx_MEM (Pmode, tga_op1);
|
||||
RTX_UNCHANGING_P (tga_op1) = 1;
|
||||
MEM_READONLY_P (tga_op1) = 1;
|
||||
|
||||
tga_op2 = gen_reg_rtx (Pmode);
|
||||
emit_insn (gen_load_ltoff_dtprel (tga_op2, op1));
|
||||
tga_op2 = gen_rtx_MEM (Pmode, tga_op2);
|
||||
RTX_UNCHANGING_P (tga_op2) = 1;
|
||||
MEM_READONLY_P (tga_op2) = 1;
|
||||
|
||||
tga_ret = emit_library_call_value (gen_tls_get_addr (), NULL_RTX,
|
||||
LCT_CONST, Pmode, 2, tga_op1,
|
||||
@ -719,7 +716,7 @@ ia64_expand_tls_address (enum tls_model tls_kind, rtx op0, rtx op1)
|
||||
tga_op1 = gen_reg_rtx (Pmode);
|
||||
emit_insn (gen_load_ltoff_dtpmod (tga_op1, op1));
|
||||
tga_op1 = gen_rtx_MEM (Pmode, tga_op1);
|
||||
RTX_UNCHANGING_P (tga_op1) = 1;
|
||||
MEM_READONLY_P (tga_op1) = 1;
|
||||
|
||||
tga_op2 = const0_rtx;
|
||||
|
||||
@ -750,7 +747,7 @@ ia64_expand_tls_address (enum tls_model tls_kind, rtx op0, rtx op1)
|
||||
tmp = gen_reg_rtx (Pmode);
|
||||
emit_insn (gen_load_ltoff_tprel (tmp, op1));
|
||||
tmp = gen_rtx_MEM (Pmode, tmp);
|
||||
RTX_UNCHANGING_P (tmp) = 1;
|
||||
MEM_READONLY_P (tmp) = 1;
|
||||
tmp = force_reg (Pmode, tmp);
|
||||
|
||||
if (!register_operand (op0, Pmode))
|
||||
|
||||
@ -719,7 +719,7 @@
|
||||
{
|
||||
operands[2] = no_new_pseudos ? operands[0] : gen_reg_rtx (DImode);
|
||||
operands[3] = gen_rtx_MEM (DImode, operands[2]);
|
||||
RTX_UNCHANGING_P (operands[3]) = 1;
|
||||
MEM_READONLY_P (operands[3]) = 1;
|
||||
})
|
||||
|
||||
(define_insn "*load_fptr_internal1"
|
||||
|
||||
@ -2084,9 +2084,6 @@ save_restore_insns (int store_p)
|
||||
gen_rtx_PLUS (Pmode, base_reg_rtx,
|
||||
GEN_INT (gp_offset - base_offset)));
|
||||
|
||||
if (! current_function_calls_eh_return)
|
||||
RTX_UNCHANGING_P (mem_rtx) = 1;
|
||||
|
||||
reg_rtx = gen_rtx_REG (gpr_mode, regno);
|
||||
|
||||
if (store_p)
|
||||
|
||||
@ -1995,7 +1995,7 @@ m32r_legitimize_pic_address (rtx orig, rtx reg)
|
||||
emit_insn (gen_addsi3 (address, address, pic_offset_table_rtx));
|
||||
pic_ref = gen_rtx_MEM (Pmode, address);
|
||||
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
insn = emit_move_insn (reg, pic_ref);
|
||||
current_function_uses_pic_offset_table = 1;
|
||||
#if 0
|
||||
|
||||
@ -1383,7 +1383,7 @@ legitimize_pic_address (rtx orig, enum machine_mode mode ATTRIBUTE_UNUSED,
|
||||
gen_rtx_PLUS (Pmode,
|
||||
pic_offset_table_rtx, orig));
|
||||
current_function_uses_pic_offset_table = 1;
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
emit_move_insn (reg, pic_ref);
|
||||
return reg;
|
||||
}
|
||||
|
||||
@ -1882,7 +1882,7 @@ block_move_sequence (rtx dest, rtx dst_mem, rtx src, rtx src_mem,
|
||||
#endif
|
||||
gen_rtx_PLUS (Pmode, src, GEN_INT (offset_ld)));
|
||||
|
||||
RTX_UNCHANGING_P (srcp) = RTX_UNCHANGING_P (src_mem);
|
||||
MEM_READONLY_P (srcp) = MEM_READONLY_P (src_mem);
|
||||
MEM_VOLATILE_P (srcp) = MEM_VOLATILE_P (src_mem);
|
||||
MEM_IN_STRUCT_P (srcp) = 1;
|
||||
emit_insn (gen_rtx_SET (VOIDmode, temp[next], srcp));
|
||||
@ -1902,7 +1902,7 @@ block_move_sequence (rtx dest, rtx dst_mem, rtx src, rtx src_mem,
|
||||
#endif
|
||||
gen_rtx_PLUS (Pmode, dest, GEN_INT (offset_st)));
|
||||
|
||||
RTX_UNCHANGING_P (dstp) = RTX_UNCHANGING_P (dst_mem);
|
||||
MEM_READONLY_P (dstp) = MEM_READONLY_P (dst_mem);
|
||||
MEM_VOLATILE_P (dstp) = MEM_VOLATILE_P (dst_mem);
|
||||
MEM_IN_STRUCT_P (dstp) = 1;
|
||||
emit_insn (gen_rtx_SET (VOIDmode, dstp, temp[phase]));
|
||||
|
||||
@ -2342,7 +2342,6 @@ mips_restore_gp (void)
|
||||
: stack_pointer_rtx,
|
||||
current_function_outgoing_args_size);
|
||||
slot = gen_rtx_MEM (Pmode, address);
|
||||
RTX_UNCHANGING_P (slot) = 1;
|
||||
|
||||
emit_move_insn (pic_offset_table_rtx, slot);
|
||||
if (!TARGET_EXPLICIT_RELOCS)
|
||||
@ -5801,8 +5800,6 @@ mips_save_restore_reg (enum machine_mode mode, int regno,
|
||||
rtx mem;
|
||||
|
||||
mem = gen_rtx_MEM (mode, plus_constant (stack_pointer_rtx, offset));
|
||||
if (!current_function_calls_eh_return)
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
|
||||
fn (gen_rtx_REG (mode, regno), mem);
|
||||
}
|
||||
@ -6980,7 +6977,6 @@ mips16_gp_pseudo_reg (void)
|
||||
rtx insn, scan;
|
||||
|
||||
cfun->machine->mips16_gp_pseudo_rtx = gen_reg_rtx (Pmode);
|
||||
RTX_UNCHANGING_P (cfun->machine->mips16_gp_pseudo_rtx) = 1;
|
||||
|
||||
/* We want to initialize this to a value which gcc will believe
|
||||
is constant. */
|
||||
|
||||
@ -2633,7 +2633,7 @@
|
||||
{
|
||||
rtx insn = emit_insn (gen_symGOT2reg_i (operands[0], operands[1]));
|
||||
|
||||
RTX_UNCHANGING_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
MEM_READONLY_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
|
||||
REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, operands[1],
|
||||
REG_NOTES (insn));
|
||||
|
||||
@ -1021,7 +1021,7 @@ legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg)
|
||||
|
||||
current_function_uses_pic_offset_table = 1;
|
||||
MEM_NOTRAP_P (pic_ref) = 1;
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
mark_reg_pointer (reg, BITS_PER_UNIT);
|
||||
insn = emit_move_insn (reg, pic_ref);
|
||||
|
||||
|
||||
@ -3458,7 +3458,7 @@ rs6000_legitimize_tls_address (rtx addr, enum tls_model model)
|
||||
tmp2 = gen_reg_rtx (Pmode);
|
||||
tmp3 = gen_reg_rtx (Pmode);
|
||||
mem = gen_rtx_MEM (Pmode, tmp1);
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
MEM_READONLY_P (mem) = 1;
|
||||
|
||||
first = emit_insn (gen_load_toc_v4_PIC_1b (tempLR, lab,
|
||||
gsym));
|
||||
@ -4410,7 +4410,7 @@ rs6000_emit_move (rtx dest, rtx source, enum machine_mode mode)
|
||||
= gen_rtx_MEM (mode,
|
||||
create_TOC_reference (XEXP (operands[1], 0)));
|
||||
set_mem_alias_set (operands[1], get_TOC_alias_set ());
|
||||
RTX_UNCHANGING_P (operands[1]) = 1;
|
||||
MEM_READONLY_P (operands[1]) = 1;
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
@ -2605,7 +2605,7 @@ legitimize_pic_address (rtx orig, rtx reg)
|
||||
new = gen_rtx_CONST (Pmode, new);
|
||||
new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, new);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
emit_move_insn (reg, new);
|
||||
new = reg;
|
||||
}
|
||||
@ -2621,7 +2621,7 @@ legitimize_pic_address (rtx orig, rtx reg)
|
||||
emit_move_insn (temp, new);
|
||||
|
||||
new = gen_rtx_MEM (Pmode, temp);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
emit_move_insn (reg, new);
|
||||
new = reg;
|
||||
}
|
||||
@ -2642,7 +2642,7 @@ legitimize_pic_address (rtx orig, rtx reg)
|
||||
|
||||
new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, temp);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
emit_move_insn (reg, new);
|
||||
new = reg;
|
||||
}
|
||||
@ -2933,7 +2933,7 @@ legitimize_tls_address (rtx addr, rtx reg)
|
||||
new = gen_rtx_CONST (Pmode, new);
|
||||
new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, new);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
temp = gen_reg_rtx (Pmode);
|
||||
emit_move_insn (temp, new);
|
||||
}
|
||||
@ -2948,7 +2948,7 @@ legitimize_tls_address (rtx addr, rtx reg)
|
||||
emit_move_insn (temp, new);
|
||||
|
||||
new = gen_rtx_MEM (Pmode, temp);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
temp = gen_reg_rtx (Pmode);
|
||||
emit_move_insn (temp, new);
|
||||
}
|
||||
@ -2968,7 +2968,7 @@ legitimize_tls_address (rtx addr, rtx reg)
|
||||
|
||||
new = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, temp);
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
|
||||
new = gen_rtx_UNSPEC (Pmode, gen_rtvec (2, new, addr), UNSPEC_TLS_LOAD);
|
||||
temp = gen_reg_rtx (Pmode);
|
||||
@ -2987,7 +2987,7 @@ legitimize_tls_address (rtx addr, rtx reg)
|
||||
|
||||
new = temp;
|
||||
new = gen_rtx_MEM (Pmode, new);
|
||||
RTX_UNCHANGING_P (new) = 1;
|
||||
MEM_READONLY_P (new) = 1;
|
||||
|
||||
new = gen_rtx_UNSPEC (Pmode, gen_rtvec (2, new, addr), UNSPEC_TLS_LOAD);
|
||||
temp = gen_reg_rtx (Pmode);
|
||||
|
||||
@ -6841,7 +6841,7 @@
|
||||
emit_move_insn (base, gen_rtx_LABEL_REF (Pmode, operands[3]));
|
||||
|
||||
index = gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, base, index));
|
||||
RTX_UNCHANGING_P (index) = 1;
|
||||
MEM_READONLY_P (index) = 1;
|
||||
MEM_NOTRAP_P (index) = 1;
|
||||
emit_move_insn (target, index);
|
||||
|
||||
|
||||
@ -1042,7 +1042,7 @@ prepare_move_operands (rtx operands[], enum machine_mode mode)
|
||||
emit_insn (gen_load_gbr (tmp2));
|
||||
tmp = gen_reg_rtx (Pmode);
|
||||
emit_insn (gen_symTPOFF2reg (tmp, op1));
|
||||
RTX_UNCHANGING_P (tmp) = 1;
|
||||
MEM_READONLY_P (tmp) = 1;
|
||||
|
||||
if (register_operand (op0, Pmode))
|
||||
op1 = op0;
|
||||
@ -4383,7 +4383,6 @@ sh_reorg (void)
|
||||
/* Remove the clobber of r0. */
|
||||
*clobberp = gen_rtx_CLOBBER (GET_MODE (clobber),
|
||||
gen_rtx_SCRATCH (Pmode));
|
||||
RTX_UNCHANGING_P (newsrc) = 1;
|
||||
}
|
||||
/* This is a mova needing a label. Create it. */
|
||||
else if (GET_CODE (src) == UNSPEC
|
||||
@ -4401,7 +4400,7 @@ sh_reorg (void)
|
||||
lab = add_constant (src, mode, 0);
|
||||
newsrc = gen_rtx_MEM (mode,
|
||||
gen_rtx_LABEL_REF (VOIDmode, lab));
|
||||
RTX_UNCHANGING_P (newsrc) = 1;
|
||||
MEM_READONLY_P (newsrc) = 1;
|
||||
}
|
||||
*patp = gen_rtx_SET (VOIDmode, dst, newsrc);
|
||||
INSN_CODE (scan) = -1;
|
||||
|
||||
@ -6766,7 +6766,7 @@
|
||||
PUT_MODE (gotsym, Pmode);
|
||||
insn = emit_insn (gen_symGOT_load (operands[0], gotsym));
|
||||
|
||||
RTX_UNCHANGING_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
MEM_READONLY_P (SET_SRC (PATTERN (insn))) = 1;
|
||||
|
||||
DONE;
|
||||
}")
|
||||
|
||||
@ -3809,7 +3809,7 @@ legitimize_pic_address (rtx orig, enum machine_mode mode ATTRIBUTE_UNUSED,
|
||||
gen_rtx_PLUS (Pmode,
|
||||
pic_offset_table_rtx, address));
|
||||
current_function_uses_pic_offset_table = 1;
|
||||
RTX_UNCHANGING_P (pic_ref) = 1;
|
||||
MEM_READONLY_P (pic_ref) = 1;
|
||||
insn = emit_move_insn (reg, pic_ref);
|
||||
/* Put a REG_EQUAL note on this insn, so that it can be optimized
|
||||
by loop. */
|
||||
|
||||
@ -1321,7 +1321,7 @@
|
||||
emit_insn (gen_addsi3 (reg, reg, tableaddress));
|
||||
/* Load the table entry. */
|
||||
mem = gen_rtx_MEM (CASE_VECTOR_MODE, reg);
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
MEM_READONLY_P (mem) = 1;
|
||||
if (! TARGET_BIG_SWITCH)
|
||||
{
|
||||
rtx reg2 = gen_reg_rtx (HImode);
|
||||
|
||||
18
gcc/cse.c
18
gcc/cse.c
@ -1461,13 +1461,7 @@ insert (rtx x, struct table_elt *classp, unsigned int hash, enum machine_mode mo
|
||||
elt->related_value = 0;
|
||||
elt->in_memory = 0;
|
||||
elt->mode = mode;
|
||||
elt->is_const = (CONSTANT_P (x)
|
||||
/* GNU C++ takes advantage of this for `this'
|
||||
(and other const values). */
|
||||
|| (REG_P (x)
|
||||
&& RTX_UNCHANGING_P (x)
|
||||
&& REGNO (x) >= FIRST_PSEUDO_REGISTER)
|
||||
|| fixed_base_plus_p (x));
|
||||
elt->is_const = (CONSTANT_P (x) || fixed_base_plus_p (x));
|
||||
|
||||
if (table[hash])
|
||||
table[hash]->prev_same_hash = elt;
|
||||
@ -2094,7 +2088,7 @@ canon_hash_string (const char *ps)
|
||||
Store 1 in do_not_record if any subexpression is volatile.
|
||||
|
||||
Store 1 in hash_arg_in_memory if X contains a MEM rtx
|
||||
which does not have the RTX_UNCHANGING_P bit set.
|
||||
which does not have the MEM_READONLY_P bit set.
|
||||
|
||||
Note that cse_insn knows that the hash code of a MEM expression
|
||||
is just (int) MEM plus the hash code of the address. */
|
||||
@ -2229,7 +2223,7 @@ canon_hash (rtx x, enum machine_mode mode)
|
||||
do_not_record = 1;
|
||||
return 0;
|
||||
}
|
||||
if (! RTX_UNCHANGING_P (x) || fixed_base_plus_p (XEXP (x, 0)))
|
||||
if (!MEM_READONLY_P (x))
|
||||
hash_arg_in_memory = 1;
|
||||
|
||||
/* Now that we have already found this special case,
|
||||
@ -2249,7 +2243,7 @@ canon_hash (rtx x, enum machine_mode mode)
|
||||
hash += (unsigned) USE;
|
||||
x = XEXP (x, 0);
|
||||
|
||||
if (! RTX_UNCHANGING_P (x) || fixed_base_plus_p (XEXP (x, 0)))
|
||||
if (!MEM_READONLY_P (x))
|
||||
hash_arg_in_memory = 1;
|
||||
|
||||
/* Now that we have already found this special case,
|
||||
@ -5974,9 +5968,7 @@ cse_insn (rtx insn, rtx libcall_insn)
|
||||
sets[i].dest_hash, GET_MODE (dest));
|
||||
|
||||
elt->in_memory = (MEM_P (sets[i].inner_dest)
|
||||
&& (! RTX_UNCHANGING_P (sets[i].inner_dest)
|
||||
|| fixed_base_plus_p (XEXP (sets[i].inner_dest,
|
||||
0))));
|
||||
&& !MEM_READONLY_P (sets[i].inner_dest));
|
||||
|
||||
/* If we have (set (subreg:m1 (reg:m2 foo) 0) (bar:m1)), M1 is no
|
||||
narrower than M2, and both M1 and M2 are the same number of words,
|
||||
|
||||
@ -735,27 +735,18 @@ prologues.
|
||||
resulted from an in-line function call.
|
||||
Stored in the @code{integrated} field and printed as @samp{/i}.
|
||||
|
||||
@findex RTX_UNCHANGING_P
|
||||
@cindex @code{reg} and @samp{/u}
|
||||
@findex MEM_READONLY_P
|
||||
@cindex @code{mem} and @samp{/u}
|
||||
@cindex @code{concat} and @samp{/u}
|
||||
@cindex @code{unchanging}, in @code{reg} and @code{mem}
|
||||
@item RTX_UNCHANGING_P (@var{x})
|
||||
Nonzero in a @code{reg}, @code{mem}, or @code{concat} if the register or
|
||||
memory is set at most once, anywhere. This does not mean that it is
|
||||
function invariant.
|
||||
@cindex @code{unchanging}, in @code{mem}
|
||||
@item MEM_READONLY_P (@var{x})
|
||||
Nonzero in a @code{mem}, if the memory is statically allocated and read-only.
|
||||
|
||||
GCC uses this flag to determine whether two references conflict. As
|
||||
implemented by @code{true_dependence} in @file{alias.c} for memory
|
||||
references, unchanging memory can't conflict with non-unchanging memory;
|
||||
a non-unchanging read can conflict with a non-unchanging write; an
|
||||
unchanging read can conflict with an unchanging write (since there may
|
||||
be a single store to this address to initialize it); and an unchanging
|
||||
store can conflict with a non-unchanging read. This means we must make
|
||||
conservative assumptions when choosing the value of this flag for a
|
||||
memory reference to an object containing both unchanging and
|
||||
non-unchanging fields: we must set the flag when writing to the object
|
||||
and clear it when reading from the object.
|
||||
Read-only in this context never modified during the lifetime of the
|
||||
program, not necessarily in ROM or in write-disabled pages. A common
|
||||
example of the later is a shared library's global offset table. This
|
||||
table is initialized by the runtime loader, so the memory is technically
|
||||
writable, but after control is transfered from the runtime loader to the
|
||||
application, this memory will never be subsequently modified.
|
||||
|
||||
Stored in the @code{unchanging} field and printed as @samp{/u}.
|
||||
|
||||
|
||||
@ -1538,10 +1538,6 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
|
||||
|
||||
MEM_VOLATILE_P (ref) |= TYPE_VOLATILE (type);
|
||||
MEM_IN_STRUCT_P (ref) = AGGREGATE_TYPE_P (type);
|
||||
RTX_UNCHANGING_P (ref)
|
||||
|= ((lang_hooks.honor_readonly
|
||||
&& (TYPE_READONLY (type) || (t != type && TREE_READONLY (t))))
|
||||
|| (! TYPE_P (t) && TREE_CONSTANT (t)));
|
||||
MEM_POINTER (ref) = POINTER_TYPE_P (type);
|
||||
MEM_NOTRAP_P (ref) = TREE_THIS_NOTRAP (t);
|
||||
|
||||
@ -1563,7 +1559,12 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp,
|
||||
the expression. */
|
||||
if (! TYPE_P (t))
|
||||
{
|
||||
maybe_set_unchanging (ref, t);
|
||||
tree base = get_base_address (t);
|
||||
if (base && DECL_P (base)
|
||||
&& TREE_READONLY (base)
|
||||
&& (TREE_STATIC (base) || DECL_EXTERNAL (base)))
|
||||
MEM_READONLY_P (ref) = 1;
|
||||
|
||||
if (TREE_THIS_VOLATILE (t))
|
||||
MEM_VOLATILE_P (ref) = 1;
|
||||
|
||||
|
||||
28
gcc/explow.c
28
gcc/explow.c
@ -577,34 +577,6 @@ validize_mem (rtx ref)
|
||||
return replace_equiv_address (ref, XEXP (ref, 0));
|
||||
}
|
||||
|
||||
/* Given REF, either a MEM or a REG, and T, either the type of X or
|
||||
the expression corresponding to REF, set RTX_UNCHANGING_P if
|
||||
appropriate. */
|
||||
|
||||
void
|
||||
maybe_set_unchanging (rtx ref, tree t)
|
||||
{
|
||||
/* We can set RTX_UNCHANGING_P from TREE_READONLY for decls whose
|
||||
initialization is only executed once, or whose initializer always
|
||||
has the same value. Currently we simplify this to PARM_DECLs in the
|
||||
first case, and decls with TREE_CONSTANT initializers in the second.
|
||||
|
||||
We cannot do this for non-static aggregates, because of the double
|
||||
writes that can be generated by store_constructor, depending on the
|
||||
contents of the initializer. Yes, this does eliminate a good fraction
|
||||
of the number of uses of RTX_UNCHANGING_P for a language like Ada.
|
||||
It also eliminates a good quantity of bugs. Let this be incentive to
|
||||
eliminate RTX_UNCHANGING_P entirely in favor of a more reliable
|
||||
solution, perhaps based on alias sets. */
|
||||
|
||||
if ((TREE_READONLY (t) && DECL_P (t)
|
||||
&& (TREE_STATIC (t) || ! AGGREGATE_TYPE_P (TREE_TYPE (t)))
|
||||
&& (TREE_CODE (t) == PARM_DECL
|
||||
|| (DECL_INITIAL (t) && TREE_CONSTANT (DECL_INITIAL (t)))))
|
||||
|| TREE_CODE_CLASS (TREE_CODE (t)) == 'c')
|
||||
RTX_UNCHANGING_P (ref) = 1;
|
||||
}
|
||||
|
||||
/* Return a modified copy of X with its memory address copied
|
||||
into a temporary register to protect it from side effects.
|
||||
If X is not a MEM, it is returned unchanged (and not copied).
|
||||
|
||||
56
gcc/expr.c
56
gcc/expr.c
@ -1359,16 +1359,6 @@ emit_block_move_via_libcall (rtx dst, rtx src, rtx size)
|
||||
|
||||
retval = expand_expr (call_expr, NULL_RTX, VOIDmode, 0);
|
||||
|
||||
/* If we are initializing a readonly value, show the above call clobbered
|
||||
it. Otherwise, a load from it may erroneously be hoisted from a loop, or
|
||||
the delay slot scheduler might overlook conflicts and take nasty
|
||||
decisions. */
|
||||
if (RTX_UNCHANGING_P (dst))
|
||||
add_function_usage_to
|
||||
(last_call_insn (), gen_rtx_EXPR_LIST (VOIDmode,
|
||||
gen_rtx_CLOBBER (VOIDmode, dst),
|
||||
NULL_RTX));
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
@ -2453,12 +2443,6 @@ clear_storage_via_libcall (rtx object, rtx size)
|
||||
|
||||
retval = expand_expr (call_expr, NULL_RTX, VOIDmode, 0);
|
||||
|
||||
/* If we are initializing a readonly value, show the above call
|
||||
clobbered it. Otherwise, a load from it may erroneously be
|
||||
hoisted from a loop. */
|
||||
if (RTX_UNCHANGING_P (object))
|
||||
emit_insn (gen_rtx_CLOBBER (VOIDmode, object));
|
||||
|
||||
return retval;
|
||||
}
|
||||
|
||||
@ -3449,8 +3433,6 @@ get_subtarget (rtx x)
|
||||
|| x == 0
|
||||
/* Only registers can be subtargets. */
|
||||
|| !REG_P (x)
|
||||
/* If the register is readonly, it can't be set more than once. */
|
||||
|| RTX_UNCHANGING_P (x)
|
||||
/* Don't use hard regs to avoid extending their life. */
|
||||
|| REGNO (x) < FIRST_PSEUDO_REGISTER
|
||||
? 0 : x);
|
||||
@ -3557,18 +3539,6 @@ expand_assignment (tree to, tree from, int want_value)
|
||||
MEM_VOLATILE_P (to_rtx) = 1;
|
||||
}
|
||||
|
||||
if (TREE_CODE (to) == COMPONENT_REF
|
||||
&& TREE_READONLY (TREE_OPERAND (to, 1))
|
||||
/* We can't assert that a MEM won't be set more than once
|
||||
if the component is not addressable because another
|
||||
non-addressable component may be referenced by the same MEM. */
|
||||
&& ! (MEM_P (to_rtx) && ! can_address_p (to)))
|
||||
{
|
||||
if (to_rtx == orig_to_rtx)
|
||||
to_rtx = copy_rtx (to_rtx);
|
||||
RTX_UNCHANGING_P (to_rtx) = 1;
|
||||
}
|
||||
|
||||
if (MEM_P (to_rtx) && ! can_address_p (to))
|
||||
{
|
||||
if (to_rtx == orig_to_rtx)
|
||||
@ -4469,15 +4439,7 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size)
|
||||
|| ((HOST_WIDE_INT) GET_MODE_SIZE (GET_MODE (target))
|
||||
== size)))
|
||||
{
|
||||
rtx xtarget = target;
|
||||
|
||||
if (readonly_fields_p (type))
|
||||
{
|
||||
xtarget = copy_rtx (xtarget);
|
||||
RTX_UNCHANGING_P (xtarget) = 1;
|
||||
}
|
||||
|
||||
clear_storage (xtarget, GEN_INT (size));
|
||||
clear_storage (target, GEN_INT (size));
|
||||
cleared = 1;
|
||||
}
|
||||
|
||||
@ -4550,14 +4512,6 @@ store_constructor (tree exp, rtx target, int cleared, HOST_WIDE_INT size)
|
||||
highest_pow2_factor (offset));
|
||||
}
|
||||
|
||||
if (TREE_READONLY (field))
|
||||
{
|
||||
if (MEM_P (to_rtx))
|
||||
to_rtx = copy_rtx (to_rtx);
|
||||
|
||||
RTX_UNCHANGING_P (to_rtx) = 1;
|
||||
}
|
||||
|
||||
#ifdef WORD_REGISTER_OPERATIONS
|
||||
/* If this initializes a field that is smaller than a word, at the
|
||||
start of a word, try to widen it to a full word.
|
||||
@ -6655,12 +6609,6 @@ expand_expr_real_1 (tree exp, rtx target, enum machine_mode tmode,
|
||||
temp = gen_rtx_MEM (mode, op0);
|
||||
set_mem_attributes (temp, exp, 0);
|
||||
|
||||
/* If we are writing to this object and its type is a record with
|
||||
readonly fields, we must mark it as readonly so it will
|
||||
conflict with readonly references to those fields. */
|
||||
if (modifier == EXPAND_WRITE && readonly_fields_p (type))
|
||||
RTX_UNCHANGING_P (temp) = 1;
|
||||
|
||||
return temp;
|
||||
}
|
||||
|
||||
@ -8790,7 +8738,7 @@ do_tablejump (rtx index, enum machine_mode mode, rtx range, rtx table_label,
|
||||
index = memory_address_noforce (CASE_VECTOR_MODE, index);
|
||||
temp = gen_reg_rtx (CASE_VECTOR_MODE);
|
||||
vector = gen_rtx_MEM (CASE_VECTOR_MODE, index);
|
||||
RTX_UNCHANGING_P (vector) = 1;
|
||||
MEM_READONLY_P (vector) = 1;
|
||||
MEM_NOTRAP_P (vector) = 1;
|
||||
convert_move (temp, vector, 0);
|
||||
|
||||
|
||||
@ -648,11 +648,6 @@ extern rtx widen_memory_access (rtx, enum machine_mode, HOST_WIDE_INT);
|
||||
valid address. */
|
||||
extern rtx validize_mem (rtx);
|
||||
|
||||
/* Given REF, either a MEM or a REG, and T, either the type of X or
|
||||
the expression corresponding to REF, set RTX_UNCHANGING_P if
|
||||
appropriate. */
|
||||
extern void maybe_set_unchanging (rtx, tree);
|
||||
|
||||
/* Given REF, a MEM, and T, either the type of X or the expression
|
||||
corresponding to REF, set the memory attributes. OBJECTP is nonzero
|
||||
if we are making a new object of this type. */
|
||||
|
||||
@ -2123,7 +2123,7 @@ insn_dead_p (struct propagate_block_info *pbi, rtx x, int call_ok,
|
||||
rtx_equal_p does not check the alias set or flags, we also
|
||||
must have the potential for them to conflict (anti_dependence). */
|
||||
for (temp = pbi->mem_set_list; temp != 0; temp = XEXP (temp, 1))
|
||||
if (unchanging_anti_dependence (r, XEXP (temp, 0)))
|
||||
if (anti_dependence (r, XEXP (temp, 0)))
|
||||
{
|
||||
rtx mem = XEXP (temp, 0);
|
||||
|
||||
@ -3756,7 +3756,7 @@ mark_used_regs (struct propagate_block_info *pbi, rtx x, rtx cond, rtx insn)
|
||||
while (temp)
|
||||
{
|
||||
next = XEXP (temp, 1);
|
||||
if (unchanging_anti_dependence (XEXP (temp, 0), x))
|
||||
if (anti_dependence (XEXP (temp, 0), x))
|
||||
{
|
||||
/* Splice temp out of the list. */
|
||||
if (prev)
|
||||
|
||||
@ -754,8 +754,6 @@ assign_stack_temp_for_type (enum machine_mode mode, HOST_WIDE_INT size, int keep
|
||||
/* If a type is specified, set the relevant flags. */
|
||||
if (type != 0)
|
||||
{
|
||||
RTX_UNCHANGING_P (slot) = (lang_hooks.honor_readonly
|
||||
&& TYPE_READONLY (type));
|
||||
MEM_VOLATILE_P (slot) = TYPE_VOLATILE (type);
|
||||
MEM_SET_IN_STRUCT_P (slot, AGGREGATE_TYPE_P (type));
|
||||
}
|
||||
@ -2667,10 +2665,7 @@ assign_parm_setup_reg (struct assign_parm_data_all *all, tree parm,
|
||||
SET_DECL_RTL (parm, x);
|
||||
}
|
||||
else
|
||||
{
|
||||
SET_DECL_RTL (parm, parmreg);
|
||||
maybe_set_unchanging (DECL_RTL (parm), parm);
|
||||
}
|
||||
SET_DECL_RTL (parm, parmreg);
|
||||
|
||||
/* Copy the value into the register. */
|
||||
if (data->nominal_mode != data->passed_mode
|
||||
@ -4056,7 +4051,6 @@ expand_function_start (tree subr)
|
||||
|
||||
set_decl_incoming_rtl (parm, static_chain_incoming_rtx);
|
||||
SET_DECL_RTL (parm, local);
|
||||
maybe_set_unchanging (local, parm);
|
||||
mark_reg_pointer (local, TYPE_ALIGN (TREE_TYPE (TREE_TYPE (parm))));
|
||||
|
||||
emit_move_insn (local, static_chain_incoming_rtx);
|
||||
|
||||
@ -191,9 +191,7 @@ varray_type global_const_equiv_varray;
|
||||
rtl is ever emitted.
|
||||
|
||||
If FOR_LHS is nonzero, if means we are processing something that will
|
||||
be the LHS of a SET. In that case, we copy RTX_UNCHANGING_P even if
|
||||
inlining since we need to be conservative in how it is set for
|
||||
such cases.
|
||||
be the LHS of a SET.
|
||||
|
||||
Handle constants that need to be placed in the constant pool by
|
||||
calling `force_const_mem'. */
|
||||
@ -317,7 +315,6 @@ copy_rtx_and_substitute (rtx orig, struct inline_remap *map, int for_lhs)
|
||||
map->reg_map[regno] = gen_reg_rtx (mode);
|
||||
REG_USERVAR_P (map->reg_map[regno]) = REG_USERVAR_P (orig);
|
||||
REG_LOOP_TEST_P (map->reg_map[regno]) = REG_LOOP_TEST_P (orig);
|
||||
RTX_UNCHANGING_P (map->reg_map[regno]) = RTX_UNCHANGING_P (orig);
|
||||
/* A reg with REG_FUNCTION_VALUE_P true will never reach here. */
|
||||
|
||||
if (REG_POINTER (map->x_regno_reg_rtx[regno]))
|
||||
|
||||
@ -484,7 +484,7 @@ validate_equiv_mem (rtx start, rtx reg, rtx memref)
|
||||
if (find_reg_note (insn, REG_DEAD, reg))
|
||||
return 1;
|
||||
|
||||
if (CALL_P (insn) && ! RTX_UNCHANGING_P (memref)
|
||||
if (CALL_P (insn) && ! MEM_READONLY_P (memref)
|
||||
&& ! CONST_OR_PURE_CALL_P (insn))
|
||||
return 0;
|
||||
|
||||
@ -518,7 +518,7 @@ equiv_init_varies_p (rtx x)
|
||||
switch (code)
|
||||
{
|
||||
case MEM:
|
||||
return ! RTX_UNCHANGING_P (x) || equiv_init_varies_p (XEXP (x, 0));
|
||||
return !MEM_READONLY_P (x) || equiv_init_varies_p (XEXP (x, 0));
|
||||
|
||||
case CONST:
|
||||
case CONST_INT:
|
||||
|
||||
@ -154,7 +154,7 @@ check_maybe_invariant (rtx x)
|
||||
|
||||
/* Just handle the most trivial case where we load from an unchanging
|
||||
location (most importantly, pic tables). */
|
||||
if (RTX_UNCHANGING_P (x))
|
||||
if (MEM_READONLY_P (x))
|
||||
break;
|
||||
|
||||
return false;
|
||||
|
||||
32
gcc/loop.c
32
gcc/loop.c
@ -2577,30 +2577,6 @@ prescan_loop (struct loop *loop)
|
||||
loop_info->has_call = 1;
|
||||
if (can_throw_internal (insn))
|
||||
loop_info->has_multiple_exit_targets = 1;
|
||||
|
||||
/* Calls initializing constant objects have CLOBBER of MEM /u in the
|
||||
attached FUNCTION_USAGE expression list, not accounted for by the
|
||||
code above. We should note these to avoid missing dependencies in
|
||||
later references. */
|
||||
{
|
||||
rtx fusage_entry;
|
||||
|
||||
for (fusage_entry = CALL_INSN_FUNCTION_USAGE (insn);
|
||||
fusage_entry; fusage_entry = XEXP (fusage_entry, 1))
|
||||
{
|
||||
rtx fusage = XEXP (fusage_entry, 0);
|
||||
|
||||
if (GET_CODE (fusage) == CLOBBER
|
||||
&& MEM_P (XEXP (fusage, 0))
|
||||
&& RTX_UNCHANGING_P (XEXP (fusage, 0)))
|
||||
{
|
||||
note_stores (fusage, note_addr_stored, loop_info);
|
||||
if (! loop_info->first_loop_store_insn
|
||||
&& loop_info->store_mems)
|
||||
loop_info->first_loop_store_insn = insn;
|
||||
}
|
||||
}
|
||||
}
|
||||
break;
|
||||
|
||||
case JUMP_INSN:
|
||||
@ -2707,8 +2683,7 @@ prescan_loop (struct loop *loop)
|
||||
if (loop_info->unknown_constant_address_altered)
|
||||
{
|
||||
rtx mem = gen_rtx_MEM (BLKmode, const0_rtx);
|
||||
|
||||
RTX_UNCHANGING_P (mem) = 1;
|
||||
MEM_READONLY_P (mem) = 1;
|
||||
loop_info->store_mems
|
||||
= gen_rtx_EXPR_LIST (VOIDmode, mem, loop_info->store_mems);
|
||||
}
|
||||
@ -3241,7 +3216,7 @@ note_addr_stored (rtx x, rtx y ATTRIBUTE_UNUSED,
|
||||
/* BLKmode MEM means all memory is clobbered. */
|
||||
if (GET_MODE (x) == BLKmode)
|
||||
{
|
||||
if (RTX_UNCHANGING_P (x))
|
||||
if (MEM_READONLY_P (x))
|
||||
loop_info->unknown_constant_address_altered = 1;
|
||||
else
|
||||
loop_info->unknown_address_altered = 1;
|
||||
@ -3333,9 +3308,6 @@ loop_invariant_p (const struct loop *loop, rtx x)
|
||||
return 0;
|
||||
|
||||
case REG:
|
||||
/* We used to check RTX_UNCHANGING_P (x) here, but that is invalid
|
||||
since the reg might be set by initialization within the loop. */
|
||||
|
||||
if ((x == frame_pointer_rtx || x == hard_frame_pointer_rtx
|
||||
|| x == arg_pointer_rtx || x == pic_offset_table_rtx)
|
||||
&& ! current_function_has_nonlocal_goto)
|
||||
|
||||
@ -1690,8 +1690,6 @@ emit_colors (struct df *df)
|
||||
place = assign_stack_local (PSEUDO_REGNO_MODE (web->regno),
|
||||
total_size,
|
||||
inherent_size == total_size ? 0 : -1);
|
||||
RTX_UNCHANGING_P (place) =
|
||||
RTX_UNCHANGING_P (regno_reg_rtx[web->regno]);
|
||||
set_mem_alias_set (place, new_alias_set ());
|
||||
}
|
||||
else
|
||||
|
||||
@ -758,7 +758,6 @@ copy_src_to_dest (rtx insn, rtx src, rtx dest, int old_max_uid)
|
||||
if (REG_P (src)
|
||||
&& REG_LIVE_LENGTH (REGNO (src)) > 0
|
||||
&& REG_P (dest)
|
||||
&& !RTX_UNCHANGING_P (dest)
|
||||
&& REG_LIVE_LENGTH (REGNO (dest)) > 0
|
||||
&& (set = single_set (insn)) != NULL_RTX
|
||||
&& !reg_mentioned_p (dest, SET_SRC (set))
|
||||
@ -1262,7 +1261,6 @@ regmove_optimize (rtx f, int nregs, FILE *regmove_dump_file)
|
||||
if (!REG_P (dst)
|
||||
|| REGNO (dst) < FIRST_PSEUDO_REGISTER
|
||||
|| REG_LIVE_LENGTH (REGNO (dst)) < 0
|
||||
|| RTX_UNCHANGING_P (dst)
|
||||
|| GET_MODE (src) != GET_MODE (dst))
|
||||
continue;
|
||||
|
||||
@ -1657,12 +1655,6 @@ fixup_match_1 (rtx insn, rtx set, rtx src, rtx src_subreg, rtx dst,
|
||||
rtx src_note = find_reg_note (insn, REG_DEAD, src), dst_note = NULL_RTX;
|
||||
int length, s_length;
|
||||
|
||||
/* If SRC is marked as unchanging, we may not change it.
|
||||
??? Maybe we could get better code by removing the unchanging bit
|
||||
instead, and changing it back if we don't succeed? */
|
||||
if (RTX_UNCHANGING_P (src))
|
||||
return 0;
|
||||
|
||||
if (! src_note)
|
||||
{
|
||||
/* Look for (set (regX) (op regA constX))
|
||||
@ -2039,10 +2031,7 @@ fixup_match_1 (rtx insn, rtx set, rtx src, rtx src_subreg, rtx dst,
|
||||
mentioning SRC or mentioning / changing DST . If in doubt, presume
|
||||
it is unstable.
|
||||
The rationale is that we want to check if we can move an insn easily
|
||||
while just paying attention to SRC and DST. A register is considered
|
||||
stable if it has the RTX_UNCHANGING_P bit set, but that would still
|
||||
leave the burden to update REG_DEAD / REG_UNUSED notes, so we don't
|
||||
want any registers but SRC and DST. */
|
||||
while just paying attention to SRC and DST. */
|
||||
static int
|
||||
stable_and_no_regs_but_for_p (rtx x, rtx src, rtx dst)
|
||||
{
|
||||
|
||||
@ -1129,8 +1129,7 @@ reload (rtx first, int global)
|
||||
MEM_COPY_ATTRIBUTES (reg, reg_equiv_memory_loc[i]);
|
||||
else
|
||||
{
|
||||
RTX_UNCHANGING_P (reg) = MEM_IN_STRUCT_P (reg)
|
||||
= MEM_SCALAR_P (reg) = 0;
|
||||
MEM_IN_STRUCT_P (reg) = MEM_SCALAR_P (reg) = 0;
|
||||
MEM_ATTRS (reg) = 0;
|
||||
}
|
||||
}
|
||||
@ -1965,8 +1964,6 @@ alter_reg (int i, int from_reg)
|
||||
below. */
|
||||
adjust = inherent_size - total_size;
|
||||
|
||||
RTX_UNCHANGING_P (x) = RTX_UNCHANGING_P (regno_reg_rtx[i]);
|
||||
|
||||
/* Nothing can alias this slot except this pseudo. */
|
||||
set_mem_alias_set (x, new_alias_set ());
|
||||
}
|
||||
|
||||
@ -256,7 +256,7 @@ mark_referenced_resources (rtx x, struct resources *res,
|
||||
case MEM:
|
||||
/* If this memory shouldn't change, it really isn't referencing
|
||||
memory. */
|
||||
if (RTX_UNCHANGING_P (x))
|
||||
if (MEM_READONLY_P (x))
|
||||
res->unch_memory = 1;
|
||||
else
|
||||
res->memory = 1;
|
||||
@ -753,7 +753,7 @@ mark_set_resources (rtx x, struct resources *res, int in_dest,
|
||||
if (in_dest)
|
||||
{
|
||||
res->memory = 1;
|
||||
res->unch_memory |= RTX_UNCHANGING_P (x);
|
||||
res->unch_memory |= MEM_READONLY_P (x);
|
||||
res->volatil |= MEM_VOLATILE_P (x);
|
||||
}
|
||||
|
||||
|
||||
@ -676,8 +676,6 @@ do { \
|
||||
They are always in the same basic block as this insn. */
|
||||
#define LOG_LINKS(INSN) XEXP(INSN, 7)
|
||||
|
||||
#define RTX_UNCHANGING_P(RTX) \
|
||||
(RTL_FLAG_CHECK3("RTX_UNCHANGING_P", (RTX), REG, MEM, CONCAT)->unchanging)
|
||||
#define RTX_FRAME_RELATED_P(RTX) \
|
||||
(RTL_FLAG_CHECK5("RTX_FRAME_RELATED_P", (RTX), INSN, CALL_INSN, \
|
||||
JUMP_INSN, BARRIER, SET)->frame_related)
|
||||
@ -1249,6 +1247,10 @@ do { \
|
||||
#define ASM_OPERANDS_SOURCE_LINE(RTX) XCINT (RTX, 6, ASM_OPERANDS)
|
||||
#endif
|
||||
|
||||
/* 1 if RTX is a mem that is statically allocated in read-only memory. */
|
||||
#define MEM_READONLY_P(RTX) \
|
||||
(RTL_FLAG_CHECK1("MEM_READONLY_P", (RTX), MEM)->unchanging)
|
||||
|
||||
/* 1 if RTX is a mem and we should keep the alias set for this mem
|
||||
unchanged when we access a component. Set to 1, or example, when we
|
||||
are already in a non-addressable component of an aggregate. */
|
||||
@ -1345,7 +1347,7 @@ do { \
|
||||
MEM_IN_STRUCT_P (LHS) = MEM_IN_STRUCT_P (RHS), \
|
||||
MEM_SCALAR_P (LHS) = MEM_SCALAR_P (RHS), \
|
||||
MEM_NOTRAP_P (LHS) = MEM_NOTRAP_P (RHS), \
|
||||
RTX_UNCHANGING_P (LHS) = RTX_UNCHANGING_P (RHS), \
|
||||
MEM_READONLY_P (LHS) = MEM_READONLY_P (RHS), \
|
||||
MEM_KEEP_ALIAS_SET_P (LHS) = MEM_KEEP_ALIAS_SET_P (RHS), \
|
||||
MEM_ATTRS (LHS) = MEM_ATTRS (RHS))
|
||||
|
||||
@ -2367,7 +2369,6 @@ extern int canon_true_dependence (rtx, enum machine_mode, rtx, rtx,
|
||||
extern int read_dependence (rtx, rtx);
|
||||
extern int anti_dependence (rtx, rtx);
|
||||
extern int output_dependence (rtx, rtx);
|
||||
extern int unchanging_anti_dependence (rtx, rtx);
|
||||
extern void mark_constant_function (void);
|
||||
extern void init_alias_once (void);
|
||||
extern void init_alias_analysis (void);
|
||||
|
||||
@ -81,7 +81,7 @@ rtx_unstable_p (rtx x)
|
||||
switch (code)
|
||||
{
|
||||
case MEM:
|
||||
return ! RTX_UNCHANGING_P (x) || rtx_unstable_p (XEXP (x, 0));
|
||||
return !MEM_READONLY_P (x) || rtx_unstable_p (XEXP (x, 0));
|
||||
|
||||
case CONST:
|
||||
case CONST_INT:
|
||||
@ -95,8 +95,7 @@ rtx_unstable_p (rtx x)
|
||||
/* As in rtx_varies_p, we have to use the actual rtx, not reg number. */
|
||||
if (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
|
||||
/* The arg pointer varies if it is not a fixed register. */
|
||||
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM])
|
||||
|| RTX_UNCHANGING_P (x))
|
||||
|| (x == arg_pointer_rtx && fixed_regs[ARG_POINTER_REGNUM]))
|
||||
return 0;
|
||||
#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
|
||||
/* ??? When call-clobbered, the value is stable modulo the restore
|
||||
@ -156,7 +155,7 @@ rtx_varies_p (rtx x, int for_alias)
|
||||
switch (code)
|
||||
{
|
||||
case MEM:
|
||||
return ! RTX_UNCHANGING_P (x) || rtx_varies_p (XEXP (x, 0), for_alias);
|
||||
return !MEM_READONLY_P (x) || rtx_varies_p (XEXP (x, 0), for_alias);
|
||||
|
||||
case CONST:
|
||||
case CONST_INT:
|
||||
@ -1027,7 +1026,7 @@ modified_between_p (rtx x, rtx start, rtx end)
|
||||
return 1;
|
||||
|
||||
case MEM:
|
||||
if (RTX_UNCHANGING_P (x))
|
||||
if (MEM_READONLY_P (x))
|
||||
return 0;
|
||||
if (modified_between_p (XEXP (x, 0), start, end))
|
||||
return 1;
|
||||
@ -1085,7 +1084,7 @@ modified_in_p (rtx x, rtx insn)
|
||||
return 1;
|
||||
|
||||
case MEM:
|
||||
if (RTX_UNCHANGING_P (x))
|
||||
if (MEM_READONLY_P (x))
|
||||
return 0;
|
||||
if (modified_in_p (XEXP (x, 0), insn))
|
||||
return 1;
|
||||
|
||||
@ -1956,8 +1956,6 @@ expand_decl (tree decl)
|
||||
mark_reg_pointer (DECL_RTL (decl),
|
||||
TYPE_ALIGN (TREE_TYPE (TREE_TYPE (decl))));
|
||||
}
|
||||
|
||||
maybe_set_unchanging (DECL_RTL (decl), decl);
|
||||
}
|
||||
|
||||
else if (TREE_CODE (DECL_SIZE_UNIT (decl)) == INTEGER_CST
|
||||
|
||||
@ -120,7 +120,6 @@ extern void pop_gimplify_context (tree);
|
||||
extern void gimplify_and_add (tree, tree *);
|
||||
|
||||
/* Miscellaneous helpers. */
|
||||
extern tree get_base_address (tree t);
|
||||
extern void gimple_add_tmp_var (tree);
|
||||
extern tree gimple_current_bind_expr (void);
|
||||
extern void gimple_push_bind_expr (tree);
|
||||
|
||||
@ -3781,11 +3781,13 @@ extern int tree_node_sizes[];
|
||||
extern bool in_gimple_form;
|
||||
|
||||
/* In tree-ssa-loop-niter.c. */
|
||||
|
||||
tree lower_bound_in_type (tree, tree);
|
||||
tree upper_bound_in_type (tree, tree);
|
||||
|
||||
/* In tree-ssa-threadupdate.c. */
|
||||
extern bool thread_through_all_blocks (void);
|
||||
|
||||
/* In tree-gimple.c. */
|
||||
extern tree get_base_address (tree t);
|
||||
|
||||
#endif /* GCC_TREE_H */
|
||||
|
||||
10
gcc/varasm.c
10
gcc/varasm.c
@ -118,12 +118,8 @@ char *unlikely_section_label = NULL;
|
||||
|
||||
char *unlikely_text_section_name = NULL;
|
||||
|
||||
/* RTX_UNCHANGING_P in a MEM can mean it is stored into, for initialization.
|
||||
So giving constant the alias set for the type will allow such
|
||||
initializations to appear to conflict with the load of the constant. We
|
||||
avoid this by giving all constants an alias set for just constants.
|
||||
Since there will be no stores to that alias set, nothing will ever
|
||||
conflict with them. */
|
||||
/* We give all constants their own alias set. Perhaps redundant with
|
||||
MEM_READONLY_P, but pre-dates it. */
|
||||
|
||||
static HOST_WIDE_INT const_alias_set;
|
||||
|
||||
@ -2947,7 +2943,7 @@ force_const_mem (enum machine_mode mode, rtx x)
|
||||
/* Construct the MEM. */
|
||||
desc->mem = def = gen_rtx_MEM (mode, symbol);
|
||||
set_mem_attributes (def, lang_hooks.types.type_for_mode (mode, 0), 1);
|
||||
RTX_UNCHANGING_P (def) = 1;
|
||||
MEM_READONLY_P (def) = 1;
|
||||
|
||||
/* If we're dropping a label to the constant pool, make sure we
|
||||
don't delete it. */
|
||||
|
||||
@ -202,7 +202,6 @@ entry_register (struct web_entry *entry, struct ref *ref, char *used)
|
||||
REG_USERVAR_P (newreg) = REG_USERVAR_P (reg);
|
||||
REG_POINTER (newreg) = REG_POINTER (reg);
|
||||
REG_LOOP_TEST_P (newreg) = REG_LOOP_TEST_P (reg);
|
||||
RTX_UNCHANGING_P (newreg) = RTX_UNCHANGING_P (reg);
|
||||
REG_ATTRS (newreg) = REG_ATTRS (reg);
|
||||
if (dump_file)
|
||||
fprintf (dump_file, "Web oldreg=%i newreg=%i\n", REGNO (reg),
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user