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rs6000.md (allocate_stack): Always use an update form instruction to update the stack back chain word...
* config/rs6000/rs6000.md (allocate_stack): Always use an update form instruction to update the stack back chain word, even if the user has disabled the generation of update instructions. (movdi_<mode>_update_stack): New. (movsi_update_stack): Likewise. * config/rs6000/rs6000.c (rs6000_emit_allocate_stack): Likewise, always use an update form instruction to update the stack back chain word. From-SVN: r144047
This commit is contained in:
Ben Elliston
Ben Elliston
parent
48965b7c6d
commit
d4bacef026
@ -1,3 +1,14 @@
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2009-02-10 Ben Elliston <bje@au.ibm.com>
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* config/rs6000/rs6000.md (allocate_stack): Always use an update
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form instruction to update the stack back chain word, even if the
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user has disabled the generation of update instructions.
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(movdi_<mode>_update_stack): New.
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(movsi_update_stack): Likewise.
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* config/rs6000/rs6000.c (rs6000_emit_allocate_stack): Likewise,
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always use an update form instruction to update the stack back
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chain word.
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2009-02-09 Sebastian Pop <sebastian.pop@amd.com>
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PR middle-end/38953
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@ -15542,6 +15542,7 @@ rs6000_emit_allocate_stack (HOST_WIDE_INT size, int copy_r12, int copy_r11)
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rtx stack_reg = gen_rtx_REG (Pmode, STACK_POINTER_REGNUM);
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rtx tmp_reg = gen_rtx_REG (Pmode, 0);
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rtx todec = gen_int_mode (-size, Pmode);
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rtx par, set, mem;
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if (INTVAL (todec) != -size)
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{
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@ -15585,54 +15586,39 @@ rs6000_emit_allocate_stack (HOST_WIDE_INT size, int copy_r12, int copy_r11)
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warning (0, "stack limit expression is not supported");
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}
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if (copy_r12 || copy_r11 || ! TARGET_UPDATE)
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if (copy_r12 || copy_r11)
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emit_move_insn (copy_r11
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? gen_rtx_REG (Pmode, 11)
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: gen_rtx_REG (Pmode, 12),
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stack_reg);
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if (TARGET_UPDATE)
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if (size > 32767)
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{
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rtx par, set, mem;
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if (size > 32767)
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{
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/* Need a note here so that try_split doesn't get confused. */
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if (get_last_insn () == NULL_RTX)
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emit_note (NOTE_INSN_DELETED);
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insn = emit_move_insn (tmp_reg, todec);
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try_split (PATTERN (insn), insn, 0);
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todec = tmp_reg;
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}
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insn = emit_insn (TARGET_32BIT
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? gen_movsi_update (stack_reg, stack_reg,
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todec, stack_reg)
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: gen_movdi_di_update (stack_reg, stack_reg,
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todec, stack_reg));
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/* Since we didn't use gen_frame_mem to generate the MEM, grab
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it now and set the alias set/attributes. The above gen_*_update
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calls will generate a PARALLEL with the MEM set being the first
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operation. */
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par = PATTERN (insn);
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gcc_assert (GET_CODE (par) == PARALLEL);
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set = XVECEXP (par, 0, 0);
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gcc_assert (GET_CODE (set) == SET);
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mem = SET_DEST (set);
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gcc_assert (MEM_P (mem));
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MEM_NOTRAP_P (mem) = 1;
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set_mem_alias_set (mem, get_frame_alias_set ());
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}
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else
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{
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insn = emit_insn (TARGET_32BIT
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? gen_addsi3 (stack_reg, stack_reg, todec)
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: gen_adddi3 (stack_reg, stack_reg, todec));
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emit_move_insn (gen_frame_mem (Pmode, stack_reg),
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copy_r11
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? gen_rtx_REG (Pmode, 11)
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: gen_rtx_REG (Pmode, 12));
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/* Need a note here so that try_split doesn't get confused. */
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if (get_last_insn () == NULL_RTX)
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emit_note (NOTE_INSN_DELETED);
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insn = emit_move_insn (tmp_reg, todec);
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try_split (PATTERN (insn), insn, 0);
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todec = tmp_reg;
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}
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insn = emit_insn (TARGET_32BIT
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? gen_movsi_update_stack (stack_reg, stack_reg,
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todec, stack_reg)
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: gen_movdi_di_update_stack (stack_reg, stack_reg,
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todec, stack_reg));
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/* Since we didn't use gen_frame_mem to generate the MEM, grab
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it now and set the alias set/attributes. The above gen_*_update
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calls will generate a PARALLEL with the MEM set being the first
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operation. */
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par = PATTERN (insn);
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gcc_assert (GET_CODE (par) == PARALLEL);
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set = XVECEXP (par, 0, 0);
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gcc_assert (GET_CODE (set) == SET);
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mem = SET_DEST (set);
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gcc_assert (MEM_P (mem));
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MEM_NOTRAP_P (mem) = 1;
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set_mem_alias_set (mem, get_frame_alias_set ());
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RTX_FRAME_RELATED_P (insn) = 1;
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REG_NOTES (insn) =
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@ -10079,6 +10079,20 @@
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stdu %3,%2(%0)"
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[(set_attr "type" "store_ux,store_u")])
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;; This pattern is only conditional on TARGET_POWERPC64, as it is
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;; needed for stack allocation, even if the user passes -mno-update.
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(define_insn "movdi_<mode>_update_stack"
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[(set (mem:DI (plus:P (match_operand:P 1 "gpc_reg_operand" "0,0")
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(match_operand:P 2 "reg_or_aligned_short_operand" "r,I")))
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(match_operand:DI 3 "gpc_reg_operand" "r,r"))
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(set (match_operand:P 0 "gpc_reg_operand" "=b,b")
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(plus:P (match_dup 1) (match_dup 2)))]
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"TARGET_POWERPC64"
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"@
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stdux %3,%0,%2
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stdu %3,%2(%0)"
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[(set_attr "type" "store_ux,store_u")])
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(define_insn "*movsi_update1"
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[(set (match_operand:SI 3 "gpc_reg_operand" "=r,r")
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(mem:SI (plus:SI (match_operand:SI 1 "gpc_reg_operand" "0,0")
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@ -10121,6 +10135,20 @@
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{stu|stwu} %3,%2(%0)"
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[(set_attr "type" "store_ux,store_u")])
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;; This is an unconditional pattern; needed for stack allocation, even
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;; if the user passes -mno-update.
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(define_insn "movsi_update_stack"
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[(set (mem:SI (plus:SI (match_operand:SI 1 "gpc_reg_operand" "0,0")
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(match_operand:SI 2 "reg_or_short_operand" "r,I")))
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(match_operand:SI 3 "gpc_reg_operand" "r,r"))
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(set (match_operand:SI 0 "gpc_reg_operand" "=b,b")
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(plus:SI (match_dup 1) (match_dup 2)))]
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""
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"@
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{stux|stwux} %3,%0,%2
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{stu|stwu} %3,%2(%0)"
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[(set_attr "type" "store_ux,store_u")])
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(define_insn "*movhi_update1"
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[(set (match_operand:HI 3 "gpc_reg_operand" "=r,r")
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(mem:HI (plus:SI (match_operand:SI 1 "gpc_reg_operand" "0,0")
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@ -10543,6 +10571,7 @@
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{ rtx chain = gen_reg_rtx (Pmode);
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rtx stack_bot = gen_rtx_MEM (Pmode, stack_pointer_rtx);
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rtx neg_op0;
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rtx insn, par, set, mem;
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emit_move_insn (chain, stack_bot);
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@ -10569,34 +10598,22 @@
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else
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neg_op0 = GEN_INT (- INTVAL (operands[1]));
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if (TARGET_UPDATE)
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{
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rtx insn, par, set, mem;
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insn = emit_insn ((* ((TARGET_32BIT) ? gen_movsi_update
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: gen_movdi_di_update))
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insn = emit_insn ((* ((TARGET_32BIT) ? gen_movsi_update
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: gen_movdi_di_update))
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(stack_pointer_rtx, stack_pointer_rtx, neg_op0,
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chain));
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/* Since we didn't use gen_frame_mem to generate the MEM, grab
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it now and set the alias set/attributes. The above gen_*_update
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calls will generate a PARALLEL with the MEM set being the first
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operation. */
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par = PATTERN (insn);
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gcc_assert (GET_CODE (par) == PARALLEL);
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set = XVECEXP (par, 0, 0);
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gcc_assert (GET_CODE (set) == SET);
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mem = SET_DEST (set);
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gcc_assert (MEM_P (mem));
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MEM_NOTRAP_P (mem) = 1;
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set_mem_alias_set (mem, get_frame_alias_set ());
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}
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else
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{
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emit_insn ((* ((TARGET_32BIT) ? gen_addsi3 : gen_adddi3))
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(stack_pointer_rtx, stack_pointer_rtx, neg_op0));
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emit_move_insn (gen_frame_mem (Pmode, stack_pointer_rtx), chain);
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}
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/* Since we didn't use gen_frame_mem to generate the MEM, grab
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it now and set the alias set/attributes. The above gen_*_update
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calls will generate a PARALLEL with the MEM set being the first
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operation. */
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par = PATTERN (insn);
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gcc_assert (GET_CODE (par) == PARALLEL);
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set = XVECEXP (par, 0, 0);
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gcc_assert (GET_CODE (set) == SET);
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mem = SET_DEST (set);
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gcc_assert (MEM_P (mem));
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MEM_NOTRAP_P (mem) = 1;
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set_mem_alias_set (mem, get_frame_alias_set ());
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emit_move_insn (operands[0], virtual_stack_dynamic_rtx);
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DONE;
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