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| -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); |