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| author | Roger Sayle <roger@eyesopen.com> | 2007-01-19 00:30:47 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2007-01-19 00:30:47 +0000 |
| commit | f85242f0ce997c299c1a07f5fe94f5ffe63bf599 (patch) | |
| tree | beee2e7571eb302362386c8264bf2c958e486978 /gcc | |
| parent | 63d71dea804d48244d7bdd506d8ae48f2f312b3b (diff) | |
| download | gcc-f85242f0ce997c299c1a07f5fe94f5ffe63bf599.zip gcc-f85242f0ce997c299c1a07f5fe94f5ffe63bf599.tar.gz gcc-f85242f0ce997c299c1a07f5fe94f5ffe63bf599.tar.bz2 | |
fold-const.c (fold_unary): Optimize away a VIEW_CONVERT_EXPR to the same type as it's operand.
* fold-const.c (fold_unary) <VIEW_CONVERT_EXPR>: Optimize away a
VIEW_CONVERT_EXPR to the same type as it's operand.
From-SVN: r120945
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 2 |
2 files changed, 7 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 99a5870..c2e1f70 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2007-01-18 Roger Sayle <roger@eyesopen.com> + + * fold-const.c (fold_unary) <VIEW_CONVERT_EXPR>: Optimize away a + VIEW_CONVERT_EXPR to the same type as it's operand. + 2007-01-18 David Edelsohn <edelsohn@gnu.org> * config/rs6000/darwin-ldouble.c: Only build _SOFT_FLOAT if diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 2ae560f..5588c37 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -7573,6 +7573,8 @@ fold_unary (enum tree_code code, tree type, tree op0) return tem ? tem : NULL_TREE; case VIEW_CONVERT_EXPR: + if (TREE_TYPE (op0) == type) + return op0; if (TREE_CODE (op0) == VIEW_CONVERT_EXPR) return fold_build1 (VIEW_CONVERT_EXPR, type, TREE_OPERAND (op0, 0)); return fold_view_convert_expr (type, op0); |