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| author | Richard Guenther <rguenther@suse.de> | 2010-06-15 15:37:50 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2010-06-15 15:37:50 +0000 |
| commit | 7fc1dad61dd02355750fcb54484f6174c3dbef96 (patch) | |
| tree | 656bc157f503e875f3dc85e936ccc480715fc49a /gcc/tree-ssa-pre.c | |
| parent | 8a86e760712f136623c1f5ae80a95f827c80014b (diff) | |
| download | gcc-7fc1dad61dd02355750fcb54484f6174c3dbef96.zip gcc-7fc1dad61dd02355750fcb54484f6174c3dbef96.tar.gz gcc-7fc1dad61dd02355750fcb54484f6174c3dbef96.tar.bz2 | |
tree-ssa-pre.c (eliminate): Handle PHI elimination to constants.
2010-06-15 Richard Guenther <rguenther@suse.de>
* tree-ssa-pre.c (eliminate): Handle PHI elimination to constants.
* gcc.dg/tree-ssa/ssa-sccvn-4.c: Adjust.
From-SVN: r160793
Diffstat (limited to 'gcc/tree-ssa-pre.c')
| -rw-r--r-- | gcc/tree-ssa-pre.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 687a363..a62439f 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4330,7 +4330,14 @@ eliminate (void) else gcc_unreachable (); } - if (!sprimeexpr + if (!sprime && is_gimple_min_invariant (VN_INFO (res)->valnum)) + { + sprime = VN_INFO (res)->valnum; + if (!useless_type_conversion_p (TREE_TYPE (res), + TREE_TYPE (sprime))) + sprime = fold_convert (TREE_TYPE (res), sprime); + } + if (!sprime || sprime == res) { gsi_next (&gsi); |