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| author | Bernd Schmidt <bernds@cygnus.co.uk> | 1999-08-26 17:33:35 +0000 |
|---|---|---|
| committer | Bernd Schmidt <crux@gcc.gnu.org> | 1999-08-26 17:33:35 +0000 |
| commit | 21e3a717241e4b6f70b933212278db63c239563a (patch) | |
| tree | f2eb991fa7372c76eac5bd3689a5e2244beb4ffd /gcc/gcse.c | |
| parent | 49b1e9eb966d7ded474167d5a5463b05ee8bc479 (diff) | |
| download | gcc-21e3a717241e4b6f70b933212278db63c239563a.zip gcc-21e3a717241e4b6f70b933212278db63c239563a.tar.gz gcc-21e3a717241e4b6f70b933212278db63c239563a.tar.bz2 | |
Ignore no-ops in cprop pass.
From-SVN: r28901
Diffstat (limited to 'gcc/gcse.c')
| -rw-r--r-- | gcc/gcse.c | 6 |
1 files changed, 5 insertions, 1 deletions
@@ -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; |