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| author | Richard Guenther <rguenther@suse.de> | 2012-06-18 14:05:27 +0000 |
|---|---|---|
| committer | Richard Guenther <rguenther@suse.de> | 2012-06-18 14:05:27 +0000 |
| commit | 73a1290b28cdc0b5f2e7ccaf9a7cc031298b390e (patch) | |
| tree | 63fda7b3c2847615a9a2cc1f82d7ccaca1f96618 /gcc/tree-vect-patterns.c | |
| parent | 850952f0e70529644d41c47c4397ee3a0b73d4be (diff) | |
2012-06-18 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53693
* tree-vect-patterns.c (vect_operation_fits_smaller_type):
Reject operands with more than one use.
* g++.dg/torture/pr53693.C: New testcase.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@188733 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-vect-patterns.c')
| -rw-r--r-- | gcc/tree-vect-patterns.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/gcc/tree-vect-patterns.c b/gcc/tree-vect-patterns.c index 4138d41c11d..11a5019985c 100644 --- a/gcc/tree-vect-patterns.c +++ b/gcc/tree-vect-patterns.c @@ -991,6 +991,11 @@ vect_operation_fits_smaller_type (gimple stmt, tree def, tree *new_type, || TREE_CODE (const_oprnd) != INTEGER_CST) return false; + /* If oprnd has other uses besides that in stmt we cannot mark it + as being part of a pattern only. */ + if (!has_single_use (oprnd)) + return false; + /* If we are in the middle of a sequence, we use DEF from a previous statement. Otherwise, OPRND has to be a result of type promotion. */ if (*new_type) |