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| author | Jakub Jelinek <jakub@redhat.com> | 2009-01-13 23:36:06 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2009-01-13 23:36:06 +0100 |
| commit | d3302fd3185bb03a499e9698d1995ade81ee0321 (patch) | |
| tree | 4718c31eaf240b0488be6f53ac949577827b42bc /gcc/combine.c | |
| parent | 7ab23fd0b97eff95faf1f48828784f4025ceca59 (diff) | |
| download | gcc-d3302fd3185bb03a499e9698d1995ade81ee0321.zip gcc-d3302fd3185bb03a499e9698d1995ade81ee0321.tar.gz gcc-d3302fd3185bb03a499e9698d1995ade81ee0321.tar.bz2 | |
re PR rtl-optimization/38774 (ice in df_refs_verify, at df-scan.c:4307)
PR rtl-optimization/38774
* combine.c (simplify_set): When undoing cc_use change, don't do
PUT_CODE on the newly created comparison, but instead put back the
old comparison.
* gcc.dg/torture/pr38774.c: New test.
From-SVN: r143355
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 82bf9f5..3aca075 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5706,6 +5706,7 @@ simplify_set (rtx x) { int other_changed_previously = other_changed; unsigned HOST_WIDE_INT mask; + rtx old_cc_use = *cc_use; SUBST (*cc_use, gen_rtx_fmt_ee (new_code, GET_MODE (*cc_use), dest, const0_rtx)); @@ -5728,7 +5729,7 @@ simplify_set (rtx x) if ((recog_for_combine (&pat, other_insn, ¬e) < 0 && ! check_asm_operands (pat))) { - PUT_CODE (*cc_use, old_code); + *cc_use = old_cc_use; other_changed = 0; op0 = simplify_gen_binary (XOR, GET_MODE (op0), |