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mips.h (TARGET_SPLIT_CALLS): Check TARGET_CALL_CLOBBERED_GP.
gcc/ * config/mips/mips.h (TARGET_SPLIT_CALLS): Check TARGET_CALL_CLOBBERED_GP. (TARGET_SIBCALLS): Check TARGET_USE_GOT instead of TARGET_ABICALLS. (TARGET_USE_GOT, TARGET_CALL_CLOBBERED_GP): New macros. (TARGET_CALL_SAVED_GP, TARGET_USE_PIC_FN_ADDR_REG): Likewise. (STARTING_FRAME_OFFSET): Check TARGET_CALL_CLOBBERED_GP instead of TARGET_ABICALLS && !TARGET_NEWABI. (MIPS_CALL): Check TARGET_USE_GOT instead of TARGET_ABICALLS. * config/mips/mips.c (mips_load_call_address): Check TARGET_CALL_SAVED_GP instead of TARGET_NEWABI. (mips_global_pointer): Check TARGET_USE_GOT instead of TARGET_ABICALLS. Check TARGET_CALL_SAVED_GP instead of TARGET_NEWABI. (mips_save_reg_p): Check TARGET_CALL_SAVED_GP instead of TARGET_ABICALLS && TARGET_NEWABI. (mips_current_loadgp_style): Check TARGET_USE_GOT instead of TARGET_ABICALLS. (mips_expand_prologue): Check TARGET_OLDABI instead of !TARGET_NEWABI. (mips_expand_epilogue): Check TARGET_CALL_SAVED_GP instead of TARGET_ABICALLS && TARGET_NEWABI. (mips_output_mi_thunk): Check TARGET_USE_GOT instead of TARGET_ABICALLS. Check TARGET_CALL_SAVED_GP instead of TARGET_NEWABI. Use TARGET_USE_PIC_FN_ADDR_REG to decide whether indirect calls must use $25. (mips_extra_live_on_entry): Check TARGET_GOT instead of TARGET_ABICALLS. * config/mips/mips.md (jal_macro): Check flag_pic and TARGET_CALL_CLOBBERED_GP instead of TARGET_ABICALLS and TARGET_NEWABI. (builtin_setjmp_setup, builtin_longjmp): Check TARGET_USE_GOT instead of TARGET_ABICALLS. (exception_receiver): Check TARGET_CALL_CLOBBERED_GP instead of TARGET_ABICALLS && TARGET_OLDABI. (load_call<mode>): Check TARGET_USE_GOT instead of TARGET_ABICALLS. (sibcall): In the comment above the define_insn, mention TARGET_USE_PIC_FN_ADDR_REG instead of TARGET_ABICALLS. * config/mips/constraints.md (c): Check TARGET_USE_PIC_FN_ADDR_REG instead of TARGET_ABICALLS. From-SVN: r123751
This commit is contained in:
Richard Sandiford
Richard Sandiford
parent
2f11881446
commit
14976818e7
@ -1,3 +1,42 @@
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2007-04-12 Richard Sandiford <richard@codesourcery.com>
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* config/mips/mips.h (TARGET_SPLIT_CALLS): Check
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TARGET_CALL_CLOBBERED_GP.
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(TARGET_SIBCALLS): Check TARGET_USE_GOT instead of TARGET_ABICALLS.
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(TARGET_USE_GOT, TARGET_CALL_CLOBBERED_GP): New macros.
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(TARGET_CALL_SAVED_GP, TARGET_USE_PIC_FN_ADDR_REG): Likewise.
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(STARTING_FRAME_OFFSET): Check TARGET_CALL_CLOBBERED_GP instead
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of TARGET_ABICALLS && !TARGET_NEWABI.
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(MIPS_CALL): Check TARGET_USE_GOT instead of TARGET_ABICALLS.
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* config/mips/mips.c (mips_load_call_address): Check
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TARGET_CALL_SAVED_GP instead of TARGET_NEWABI.
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(mips_global_pointer): Check TARGET_USE_GOT instead of TARGET_ABICALLS.
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Check TARGET_CALL_SAVED_GP instead of TARGET_NEWABI.
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(mips_save_reg_p): Check TARGET_CALL_SAVED_GP instead of
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TARGET_ABICALLS && TARGET_NEWABI.
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(mips_current_loadgp_style): Check TARGET_USE_GOT instead of
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TARGET_ABICALLS.
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(mips_expand_prologue): Check TARGET_OLDABI instead of !TARGET_NEWABI.
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(mips_expand_epilogue): Check TARGET_CALL_SAVED_GP instead of
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TARGET_ABICALLS && TARGET_NEWABI.
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(mips_output_mi_thunk): Check TARGET_USE_GOT instead of
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TARGET_ABICALLS. Check TARGET_CALL_SAVED_GP instead of
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TARGET_NEWABI. Use TARGET_USE_PIC_FN_ADDR_REG to decide
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whether indirect calls must use $25.
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(mips_extra_live_on_entry): Check TARGET_GOT instead of
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TARGET_ABICALLS.
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* config/mips/mips.md (jal_macro): Check flag_pic and
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TARGET_CALL_CLOBBERED_GP instead of TARGET_ABICALLS and TARGET_NEWABI.
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(builtin_setjmp_setup, builtin_longjmp): Check TARGET_USE_GOT
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instead of TARGET_ABICALLS.
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(exception_receiver): Check TARGET_CALL_CLOBBERED_GP instead of
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TARGET_ABICALLS && TARGET_OLDABI.
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(load_call<mode>): Check TARGET_USE_GOT instead of TARGET_ABICALLS.
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(sibcall): In the comment above the define_insn, mention
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TARGET_USE_PIC_FN_ADDR_REG instead of TARGET_ABICALLS.
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* config/mips/constraints.md (c): Check TARGET_USE_PIC_FN_ADDR_REG
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instead of TARGET_ABICALLS.
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2007-04-12 Bernd Schmidt <bernd.schmidt@analog.com>
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* doc/md.texi (Blackfin family constraints): Document PA and PB.
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@ -42,7 +42,7 @@
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(define_register_constraint "b" "ALL_REGS"
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"@internal")
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(define_register_constraint "c" "TARGET_ABICALLS ? PIC_FN_ADDR_REG
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(define_register_constraint "c" "TARGET_USE_PIC_FN_ADDR_REG ? PIC_FN_ADDR_REG
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: TARGET_MIPS16 ? M16_NA_REGS
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: GR_REGS"
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"A register suitable for use in an indirect jump. This will always be
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@ -3354,10 +3354,10 @@ mips_load_call_address (rtx dest, rtx addr, int sibcall_p)
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{
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/* If we're generating PIC, and this call is to a global function,
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try to allow its address to be resolved lazily. This isn't
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possible for NewABI sibcalls since the value of $gp on entry
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possible if TARGET_CALL_SAVED_GP since the value of $gp on entry
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to the stub would be our caller's gp, not ours. */
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if (TARGET_EXPLICIT_RELOCS
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&& !(sibcall_p && TARGET_NEWABI)
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&& !(sibcall_p && TARGET_CALL_SAVED_GP)
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&& global_got_operand (addr, VOIDmode))
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{
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rtx high, lo_sum_symbol;
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@ -6144,8 +6144,8 @@ mips_global_pointer (void)
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{
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unsigned int regno;
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/* $gp is always available in non-abicalls code. */
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if (!TARGET_ABICALLS)
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/* $gp is always available unless we're using a GOT. */
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if (!TARGET_USE_GOT)
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return GLOBAL_POINTER_REGNUM;
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/* We must always provide $gp when it is used implicitly. */
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@ -6182,7 +6182,7 @@ mips_global_pointer (void)
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/* We need a global pointer, but perhaps we can use a call-clobbered
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register instead of $gp. */
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if (TARGET_NEWABI && current_function_is_leaf)
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if (TARGET_CALL_SAVED_GP && current_function_is_leaf)
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for (regno = GP_REG_FIRST; regno <= GP_REG_LAST; regno++)
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if (!regs_ever_live[regno]
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&& call_used_regs[regno]
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@ -6199,10 +6199,10 @@ mips_global_pointer (void)
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static bool
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mips_save_reg_p (unsigned int regno)
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{
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/* We only need to save $gp for NewABI PIC. */
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/* We only need to save $gp if TARGET_CALL_SAVED_GP and only then
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if we have not chosen a call-clobbered substitute. */
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if (regno == GLOBAL_POINTER_REGNUM)
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return (TARGET_ABICALLS && TARGET_NEWABI
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&& cfun->machine->global_pointer == regno);
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return TARGET_CALL_SAVED_GP && cfun->machine->global_pointer == regno;
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/* Check call-saved registers. */
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if (regs_ever_live[regno] && !call_used_regs[regno])
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@ -6546,7 +6546,7 @@ mips_output_cplocal (void)
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enum mips_loadgp_style
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mips_current_loadgp_style (void)
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{
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if (!TARGET_ABICALLS || cfun->machine->global_pointer == 0)
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if (!TARGET_USE_GOT || cfun->machine->global_pointer == 0)
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return LOADGP_NONE;
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if (TARGET_ABSOLUTE_ABICALLS)
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@ -6858,7 +6858,7 @@ mips_expand_prologue (void)
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mips_emit_loadgp ();
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/* If generating o32/o64 abicalls, save $gp on the stack. */
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if (TARGET_ABICALLS && !TARGET_NEWABI && !current_function_is_leaf)
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if (TARGET_ABICALLS && TARGET_OLDABI && !current_function_is_leaf)
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emit_insn (gen_cprestore (GEN_INT (current_function_outgoing_args_size)));
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/* If we are profiling, make sure no instructions are scheduled before
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@ -6992,10 +6992,10 @@ mips_expand_epilogue (int sibcall_p)
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if (target != stack_pointer_rtx)
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emit_move_insn (stack_pointer_rtx, target);
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/* If we're using addressing macros for n32/n64 abicalls, $gp is
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implicitly used by all SYMBOL_REFs. We must emit a blockage
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insn before restoring it. */
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if (TARGET_ABICALLS && TARGET_NEWABI && !TARGET_EXPLICIT_RELOCS)
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/* If we're using addressing macros, $gp is implicitly used by all
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SYMBOL_REFs. We must emit a blockage insn before restoring $gp
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from the stack. */
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if (TARGET_CALL_SAVED_GP && !TARGET_EXPLICIT_RELOCS)
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emit_insn (gen_blockage ());
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/* Restore the registers. */
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@ -7086,12 +7086,12 @@ mips_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
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reload_completed = 1;
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reset_block_changes ();
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/* Pick a global pointer for -mabicalls. Use $15 rather than $28
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for TARGET_NEWABI since the latter is a call-saved register. */
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if (TARGET_ABICALLS)
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/* Pick a global pointer. Use a call-clobbered register if
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TARGET_CALL_SAVED_GP, so that we can use a sibcall. */
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if (TARGET_USE_GOT)
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cfun->machine->global_pointer
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= REGNO (pic_offset_table_rtx)
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= TARGET_NEWABI ? 15 : GLOBAL_POINTER_REGNUM;
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= TARGET_CALL_SAVED_GP ? 15 : GLOBAL_POINTER_REGNUM;
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/* Set up the global pointer for n32 or n64 abicalls. */
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mips_emit_loadgp ();
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@ -7137,24 +7137,27 @@ mips_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
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/* Jump to the target function. Use a sibcall if direct jumps are
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allowed, otherwise load the address into a register first. */
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fnaddr = XEXP (DECL_RTL (function), 0);
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if (TARGET_MIPS16 || TARGET_ABICALLS || TARGET_LONG_CALLS)
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if (TARGET_MIPS16 || TARGET_USE_GOT || TARGET_LONG_CALLS)
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{
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/* This is messy. gas treats "la $25,foo" as part of a call
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sequence and may allow a global "foo" to be lazily bound.
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The general move patterns therefore reject this combination.
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In this context, lazy binding would actually be OK for o32 and o64,
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but it's still wrong for n32 and n64; see mips_load_call_address.
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We must therefore load the address via a temporary register if
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mips_dangerous_for_la25_p.
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In this context, lazy binding would actually be OK
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for TARGET_CALL_CLOBBERED_GP, but it's still wrong for
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TARGET_CALL_SAVED_GP; see mips_load_call_address.
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We must therefore load the address via a temporary
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register if mips_dangerous_for_la25_p.
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If we jump to the temporary register rather than $25, the assembler
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can use the move insn to fill the jump's delay slot. */
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if (TARGET_ABICALLS && !mips_dangerous_for_la25_p (fnaddr))
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if (TARGET_USE_PIC_FN_ADDR_REG
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&& !mips_dangerous_for_la25_p (fnaddr))
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temp1 = gen_rtx_REG (Pmode, PIC_FUNCTION_ADDR_REGNUM);
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mips_load_call_address (temp1, fnaddr, true);
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if (TARGET_ABICALLS && REGNO (temp1) != PIC_FUNCTION_ADDR_REGNUM)
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if (TARGET_USE_PIC_FN_ADDR_REG
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&& REGNO (temp1) != PIC_FUNCTION_ADDR_REGNUM)
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emit_move_insn (gen_rtx_REG (Pmode, PIC_FUNCTION_ADDR_REGNUM), temp1);
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emit_jump_insn (gen_indirect_jump (temp1));
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}
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@ -10878,13 +10881,13 @@ mips_encode_section_info (tree decl, rtx rtl, int first)
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}
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}
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/* Implement TARGET_EXTRA_LIVE_ON_ENTRY. PIC_FUNCTION_ADDR_REGNUM is live
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on entry to a function when generating -mshared abicalls code. */
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/* Implement TARGET_EXTRA_LIVE_ON_ENTRY. Some code models use the incoming
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value of PIC_FUNCTION_ADDR_REGNUM to set up the global pointer. */
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static void
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mips_extra_live_on_entry (bitmap regs)
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{
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if (TARGET_ABICALLS && !TARGET_ABSOLUTE_ABICALLS)
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if (TARGET_USE_GOT && !TARGET_ABSOLUTE_ABICALLS)
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bitmap_set_bit (regs, PIC_FUNCTION_ADDR_REGNUM);
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}
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@ -144,12 +144,11 @@ extern const struct mips_rtx_cost_data *mips_cost;
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/* Run-time compilation parameters selecting different hardware subsets. */
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/* True if the call patterns should be split into a jalr followed by
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an instruction to restore $gp. This is only ever true for SVR4 PIC,
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in which $gp is call-clobbered. It is only safe to split the load
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an instruction to restore $gp. It is only safe to split the load
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from the call when every use of $gp is explicit. */
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#define TARGET_SPLIT_CALLS \
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(TARGET_EXPLICIT_RELOCS && TARGET_ABICALLS && !TARGET_NEWABI)
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(TARGET_EXPLICIT_RELOCS && TARGET_CALL_CLOBBERED_GP)
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/* True if we're generating a form of -mabicalls in which we can use
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operators like %hi and %lo to refer to locally-binding symbols.
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@ -173,12 +172,22 @@ extern const struct mips_rtx_cost_data *mips_cost;
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using sibling calls in this case anyway; they would usually
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be longer than normal calls.
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- TARGET_ABICALLS && !TARGET_EXPLICIT_RELOCS. call_insn_operand
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accepts global constants, but "jr $25" is the only allowed
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sibcall. */
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- TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS. call_insn_operand
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accepts global constants, but all sibcalls must be indirect. */
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#define TARGET_SIBCALLS \
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(!TARGET_MIPS16 && (!TARGET_ABICALLS || TARGET_EXPLICIT_RELOCS))
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(!TARGET_MIPS16 && (!TARGET_USE_GOT || TARGET_EXPLICIT_RELOCS))
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/* True if we need to use a global offset table to access some symbols. */
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#define TARGET_USE_GOT TARGET_ABICALLS
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/* True if TARGET_USE_GOT and if $gp is a call-clobbered register. */
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#define TARGET_CALL_CLOBBERED_GP (TARGET_ABICALLS && TARGET_OLDABI)
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/* True if TARGET_USE_GOT and if $gp is a call-saved register. */
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#define TARGET_CALL_SAVED_GP (TARGET_USE_GOT && !TARGET_CALL_CLOBBERED_GP)
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/* True if indirect calls must use register class PIC_FN_ADDR_REG. */
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#define TARGET_USE_PIC_FN_ADDR_REG TARGET_ABICALLS
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/* True if .gpword or .gpdword should be used for switch tables.
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@ -1746,8 +1755,7 @@ extern const enum reg_class mips_regno_to_class[];
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((flag_profile_values && ! TARGET_64BIT \
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? MAX (REG_PARM_STACK_SPACE(NULL), current_function_outgoing_args_size) \
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: current_function_outgoing_args_size) \
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+ (TARGET_ABICALLS && !TARGET_NEWABI \
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? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
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+ (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
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#define RETURN_ADDR_RTX mips_return_addr
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@ -2301,13 +2309,13 @@ typedef struct mips_args {
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("j" or "jal"), OPERANDS are its operands, and OPNO is the operand number
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of the target.
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When generating -mabicalls without explicit relocation operators,
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When generating GOT code without explicit relocation operators,
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all calls should use assembly macros. Otherwise, all indirect
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calls should use "jr" or "jalr"; we will arrange to restore $gp
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afterwards if necessary. Finally, we can only generate direct
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calls for -mabicalls by temporarily switching to non-PIC mode. */
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#define MIPS_CALL(INSN, OPERANDS, OPNO) \
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(TARGET_ABICALLS && !TARGET_EXPLICIT_RELOCS \
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(TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS \
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? "%*" INSN "\t%" #OPNO "%/" \
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: REG_P (OPERANDS[OPNO]) \
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? "%*" INSN "r\t%" #OPNO "%/" \
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@ -221,15 +221,16 @@
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;; This attribute is YES if the instruction is a jal macro (not a
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;; real jal instruction).
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;;
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;; jal is always a macro for o32 and o64 abicalls because it includes an
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;; instruction to restore $gp. Direct jals are also macros for -mshared
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;; abicalls because they first load the target address into $25.
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;; jal is always a macro for TARGET_CALL_CLOBBERED_GP because it includes
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;; an instruction to restore $gp. Direct jals are also macros for
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;; flag_pic && !TARGET_ABSOLUTE_ABICALLS because they first load
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;; the target address into a register.
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(define_attr "jal_macro" "no,yes"
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(cond [(eq_attr "jal" "direct")
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(symbol_ref "TARGET_ABICALLS
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&& (TARGET_OLDABI || !TARGET_ABSOLUTE_ABICALLS)")
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(symbol_ref "TARGET_CALL_CLOBBERED_GP
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|| (flag_pic && !TARGET_ABSOLUTE_ABICALLS)")
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(eq_attr "jal" "indirect")
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(symbol_ref "TARGET_ABICALLS && TARGET_OLDABI")]
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(symbol_ref "TARGET_CALL_CLOBBERED_GP")]
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(const_string "no")))
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;; Classification of each insn.
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@ -4947,14 +4948,14 @@
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[(set_attr "type" "jump")
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(set_attr "mode" "none")])
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;; For TARGET_ABICALLS, we save the gp in the jmp_buf as well.
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;; For TARGET_USE_GOT, we save the gp in the jmp_buf as well.
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;; While it is possible to either pull it off the stack (in the
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;; o32 case) or recalculate it given t9 and our target label,
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;; it takes 3 or 4 insns to do so.
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(define_expand "builtin_setjmp_setup"
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[(use (match_operand 0 "register_operand"))]
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"TARGET_ABICALLS"
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"TARGET_USE_GOT"
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{
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rtx addr;
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@ -4969,7 +4970,7 @@
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(define_expand "builtin_longjmp"
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[(use (match_operand 0 "register_operand"))]
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"TARGET_ABICALLS"
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"TARGET_USE_GOT"
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{
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/* The elements of the buffer are, in order: */
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int W = GET_MODE_SIZE (Pmode);
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@ -5105,7 +5106,7 @@
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(define_insn_and_split "exception_receiver"
|
||||
[(set (reg:SI 28)
|
||||
(unspec_volatile:SI [(const_int 0)] UNSPEC_EH_RECEIVER))]
|
||||
"TARGET_ABICALLS && TARGET_OLDABI"
|
||||
"TARGET_CALL_CLOBBERED_GP"
|
||||
"#"
|
||||
"&& reload_completed"
|
||||
[(const_int 0)]
|
||||
@ -5143,7 +5144,7 @@
|
||||
(match_operand:P 2 "immediate_operand" "")
|
||||
(reg:P FAKE_CALL_REGNO)]
|
||||
UNSPEC_LOAD_CALL))]
|
||||
"TARGET_ABICALLS"
|
||||
"TARGET_USE_GOT"
|
||||
"<load>\t%0,%R2(%1)"
|
||||
[(set_attr "type" "load")
|
||||
(set_attr "mode" "<MODE>")
|
||||
@ -5157,9 +5158,10 @@
|
||||
;; constraints.
|
||||
|
||||
;; When we use an indirect jump, we need a register that will be
|
||||
;; preserved by the epilogue. Since TARGET_ABICALLS forces us to
|
||||
;; use $25 for this purpose -- and $25 is never clobbered by the
|
||||
;; epilogue -- we might as well use it for !TARGET_ABICALLS as well.
|
||||
;; preserved by the epilogue. Since TARGET_USE_PIC_FN_ADDR_REG forces
|
||||
;; us to use $25 for this purpose -- and $25 is never clobbered by the
|
||||
;; epilogue -- we might as well use it for !TARGET_USE_PIC_FN_ADDR_REG
|
||||
;; as well.
|
||||
|
||||
(define_expand "sibcall"
|
||||
[(parallel [(call (match_operand 0 "")
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user