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| author | Dale Johannesen <dalej@apple.com> | 2002-08-14 17:41:52 +0000 |
|---|---|---|
| committer | Dale Johannesen <dalej@gcc.gnu.org> | 2002-08-14 17:41:52 +0000 |
| commit | 260f91c2927c3850919f8ebdcbc294cfbd04daa9 (patch) | |
| tree | b89a47d1833a43c5e6808e162a723c626e81adbb /gcc/explow.c | |
| parent | 615d009f6d673f288348c4394d36da2fb0dbbcc8 (diff) | |
| download | gcc-260f91c2927c3850919f8ebdcbc294cfbd04daa9.zip gcc-260f91c2927c3850919f8ebdcbc294cfbd04daa9.tar.gz gcc-260f91c2927c3850919f8ebdcbc294cfbd04daa9.tar.bz2 | |
Insert memory clobbers before the code that pops variable arrays.
This prevents the scheduler from moving references to the arrays
below the stack pop.
From-SVN: r56328
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index 1d27640..f61d009 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -1079,7 +1079,17 @@ emit_stack_restore (save_level, sa, after) } if (sa != 0) - sa = validize_mem (sa); + { + sa = validize_mem (sa); + /* These clobbers prevent the scheduler from moving + references to variable arrays below the code + that deletes (pops) the arrays. */ + emit_insn (gen_rtx_CLOBBER (VOIDmode, + gen_rtx_MEM (BLKmode, + gen_rtx_SCRATCH (VOIDmode)))); + emit_insn (gen_rtx_CLOBBER (VOIDmode, + gen_rtx_MEM (BLKmode, stack_pointer_rtx))); + } if (after) { |