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| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-12-07 20:33:07 +0000 |
|---|---|---|
| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-12-07 20:33:07 +0000 |
| commit | cd5ffed9f5bd9f92a5972c6544bc640ac1991940 (patch) | |
| tree | dc230a771ff4feb71ae8d166dd3ed4608d98ee72 | |
| parent | 833b5dc68608872f540731e9bfa2dfe5c29265e0 (diff) | |
| download | ppe42-gcc-cd5ffed9f5bd9f92a5972c6544bc640ac1991940.tar.gz ppe42-gcc-cd5ffed9f5bd9f92a5972c6544bc640ac1991940.zip | |
2008-12-07 Richard Guenther <rguenther@suse.de>
PR tree-optimization/38405
* tree-vrp.c (simplify_truth_ops_using_ranges): Make sure to
not sign-extend truth values.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@142539 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-vrp.c | 6 |
2 files changed, 12 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 85cd145d8e4..19d56b0bfc7 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-12-07 Richard Guenther <rguenther@suse.de> + + PR tree-optimization/38405 + * tree-vrp.c (simplify_truth_ops_using_ranges): Make sure to + not sign-extend truth values. + 2008-12-07 Eric Botcazou <ebotcazou@adacore.com> * tree-sra.c (scalarize_use): Create another temporary with the proper diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index 1289c49ef1d..a69b216b796 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -6512,6 +6512,12 @@ simplify_truth_ops_using_ranges (gimple_stmt_iterator *gsi, gimple stmt) !useless_type_conversion_p (TREE_TYPE (gimple_assign_lhs (stmt)), TREE_TYPE (op0)); + /* Make sure to not sign-extend -1 as a boolean value. */ + if (need_conversion + && !TYPE_UNSIGNED (TREE_TYPE (op0)) + && TYPE_PRECISION (TREE_TYPE (op0)) == 1) + return false; + switch (rhs_code) { case TRUTH_AND_EXPR: |
