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| author | Jeff Law <law@redhat.com> | 2017-09-19 23:43:28 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2017-09-19 23:43:28 -0600 |
| commit | ac9c032e4d7e6350c529707cedda7250b77190cc (patch) | |
| tree | 926f3e77aacdcb0040c2b0731fb7dd61d5f8b7aa /gcc/sched-deps.c | |
| parent | 8e7a09c353842f38c05b8cb171efa9784ab84862 (diff) | |
| download | gcc-ac9c032e4d7e6350c529707cedda7250b77190cc.zip gcc-ac9c032e4d7e6350c529707cedda7250b77190cc.tar.gz gcc-ac9c032e4d7e6350c529707cedda7250b77190cc.tar.bz2 | |
combine-stack-adj.c (combine_stack_adjustments_for_block): Do nothing for stack adjustments with REG_STACK_CHECK.
* combine-stack-adj.c (combine_stack_adjustments_for_block): Do
nothing for stack adjustments with REG_STACK_CHECK.
* sched-deps.c (parse_add_or_inc): Reject insns with
REG_STACK_CHECK from dependency breaking.
* config/i386/i386.c (pro_epilogue_adjust_stack): Return insn.
(ix86_adjust_satck_and_probe_stack_clash): Add REG_STACK_NOTEs.
* reg-notes.def (STACK_CHECK): New note.
* gcc.target/i386/stack-check-11.c: New test.
From-SVN: r252999
Diffstat (limited to 'gcc/sched-deps.c')
| -rw-r--r-- | gcc/sched-deps.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c index e7c4b87..a64e4e1 100644 --- a/gcc/sched-deps.c +++ b/gcc/sched-deps.c @@ -4714,6 +4714,11 @@ parse_add_or_inc (struct mem_inc_info *mii, rtx_insn *insn, bool before_mem) if (RTX_FRAME_RELATED_P (insn) || !pat) return false; + /* Do not allow breaking data dependencies for insns that are marked + with REG_STACK_CHECK. */ + if (find_reg_note (insn, REG_STACK_CHECK, NULL)) + return false; + /* Result must be single reg. */ if (!REG_P (SET_DEST (pat))) return false; |