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| author | Jakub Jelinek <jakub@redhat.com> | 2001-12-05 15:17:49 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2001-12-05 15:17:49 +0100 |
| commit | 1218665b70c0577046f86c7d950832dd703a67d1 (patch) | |
| tree | 7da38ae698680c56e10b64fb0ae11aa0acbcc3a2 /gcc/gcse.c | |
| parent | 7254c5fa7355f071477c329a9495a726810a5d63 (diff) | |
| download | gcc-1218665b70c0577046f86c7d950832dd703a67d1.zip gcc-1218665b70c0577046f86c7d950832dd703a67d1.tar.gz gcc-1218665b70c0577046f86c7d950832dd703a67d1.tar.bz2 | |
gcse.c (store_killed_in_insn): Consider pure calls as potential store killers in addition to normal calls.
* gcse.c (store_killed_in_insn): Consider pure calls
as potential store killers in addition to normal calls.
* gcc.c-torture/execute/20011024-1.c: New test.
From-SVN: r47675
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 15 |
1 files changed, 14 insertions, 1 deletions
@@ -6498,8 +6498,21 @@ store_killed_in_insn (x, insn) if (GET_CODE (insn) == CALL_INSN) { + /* A normal or pure call might read from pattern, + but a const call will not. */ if (CONST_OR_PURE_CALL_P (insn)) - return 0; + { + rtx link; + + for (link = CALL_INSN_FUNCTION_USAGE (insn); + link; + link = XEXP (link, 1)) + if (GET_CODE (XEXP (link, 0)) == USE + && GET_CODE (XEXP (XEXP (link, 0), 0)) == MEM + && GET_CODE (XEXP (XEXP (XEXP (link, 0), 0), 0)) == SCRATCH) + return 1; + return 0; + } else return 1; } |