From ac9c032e4d7e6350c529707cedda7250b77190cc Mon Sep 17 00:00:00 2001 From: Jeff Law Date: Tue, 19 Sep 2017 23:43:28 -0600 Subject: 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 --- gcc/sched-deps.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'gcc/sched-deps.c') 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; -- cgit v1.1