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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 | |
| 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')
| -rw-r--r-- | gcc/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/gcse.c | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b19980a..3351ad0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,7 @@ +Thu Aug 26 18:32:32 1999 Bernd Schmidt <bernds@cygnus.co.uk> + + * gcse.c (hash_scan_insn): Don't scan obvious no-ops. + 1999-08-26 09:42 -0700 Zack Weinberg <zack@bitmover.com> * tree.h: fancy_abort always takes three args. @@ -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; |