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| author | Ira Rosen <irar@il.ibm.com> | 2012-01-12 14:41:44 +0000 |
|---|---|---|
| committer | Ira Rosen <irar@gcc.gnu.org> | 2012-01-12 14:41:44 +0000 |
| commit | 82db3d43de58dd1c6e0c074fc2e0e85cdc09f0cc (patch) | |
| tree | 3467c5cd21b186bcb2ee3ad3559793fbeb64f44e /gcc/tree-vect-patterns.c | |
| parent | 869eea243d175a1c6b6ac152795c28ae986512d3 (diff) | |
| download | gcc-82db3d43de58dd1c6e0c074fc2e0e85cdc09f0cc.zip gcc-82db3d43de58dd1c6e0c074fc2e0e85cdc09f0cc.tar.gz gcc-82db3d43de58dd1c6e0c074fc2e0e85cdc09f0cc.tar.bz2 | |
re PR tree-optimization/51799 (Compiler ICE in vect_is_simple_use_1)
PR tree-optimization/51799
* tree-vect-patterns.c (vect_recog_over_widening_pattern): Check
that the last operation is a type demotion.
From-SVN: r183126
Diffstat (limited to 'gcc/tree-vect-patterns.c')
| -rw-r--r-- | gcc/tree-vect-patterns.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c index 46d43ce..34ac2e5 100644 --- a/gcc/tree-vect-patterns.c +++ b/gcc/tree-vect-patterns.c @@ -1186,13 +1186,15 @@ vect_recog_over_widening_pattern (VEC (gimple, heap) **stmts, { use_lhs = gimple_assign_lhs (use_stmt); use_type = TREE_TYPE (use_lhs); - /* Support only type promotion or signedess change. Check that USE_TYPE - is not bigger than the original type. */ + /* Support only type demotion or signedess change. */ if (!INTEGRAL_TYPE_P (use_type) - || TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type) - || TYPE_PRECISION (type) < TYPE_PRECISION (use_type)) + || TYPE_PRECISION (type) <= TYPE_PRECISION (use_type)) return NULL; + /* Check that NEW_TYPE is not bigger than the conversion result. */ + if (TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type)) + return NULL; + if (TYPE_UNSIGNED (new_type) != TYPE_UNSIGNED (use_type) || TYPE_PRECISION (new_type) != TYPE_PRECISION (use_type)) { |