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| author | crux <crux@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-08-26 17:33:35 +0000 |
|---|---|---|
| committer | crux <crux@138bc75d-0d04-0410-961f-82ee72b054a4> | 1999-08-26 17:33:35 +0000 |
| commit | 9ddb4deaca9e4109f0e50951ab033be8bec027d9 (patch) | |
| tree | f2eb991fa7372c76eac5bd3689a5e2244beb4ffd /gcc/gcse.c | |
| parent | 9873a5932f067566599692944675fd29b9332708 (diff) | |
| download | gcc-9ddb4deaca9e4109f0e50951ab033be8bec027d9.tar.gz | |
Ignore no-ops in cprop pass.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@28901 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/gcse.c b/gcc/gcse.c index 7a484ab2be7..3fa620a9c29 100644 --- a/gcc/gcse.c +++ b/gcc/gcse.c @@ -1919,7 +1919,11 @@ hash_scan_insn (insn, set_p, in_libcall_block) what's been modified. */ if (GET_CODE (pat) == SET && ! in_libcall_block) - hash_scan_set (pat, insn, set_p); + { + /* Ignore obvious no-ops. */ + if (SET_SRC (pat) != SET_DEST (pat)) + hash_scan_set (pat, insn, set_p); + } else if (GET_CODE (pat) == PARALLEL) { int i; |