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re PR tree-optimization/51301 (Compiler ICE in vect_is_simple_use_1)

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PR tree-optimization/51301
        * tree-vect-patterns.c (vect_recog_over_widening_pattern): Check
        that the last statement doesn't convert to a bigger type than the
        original type of the computation.

From-SVN: r181797
This commit is contained in:
Ira Rosen 2011-11-29 07:00:53 +00:00 • committed by Ira Rosen
parent db4e52814d
commit b2a1a74d99
4 changed files with 33 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2011-11-29 Ira Rosen <ira.rosen@linaro.org>
PR tree-optimization/51301
* tree-vect-patterns.c (vect_recog_over_widening_pattern): Check that
the last statement doesn't convert to a bigger type than the original
type of the computation.
2011-11-28 Richard Henderson <rth@redhat.com>
* config/rs6000/rs6000.c (rs6000_expand_atomic_compare_and_swap):

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2011-11-29 Ira Rosen <ira.rosen@linaro.org>
PR tree-optimization/51301
* gcc.dg/vect/pr51301.c: New test.
2011-11-28 Uros Bizjak <ubizjak@gmail.com>
* g++.dg/cdce3.C: Use dg-additional-options.

15
gcc/testsuite/gcc.dg/vect/pr51301.c Normal file
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@ -0,0 +1,15 @@
/* { dg-do compile } */
typedef signed char int8_t;
typedef signed long long int64_t;
int64_t
f0a (int8_t * __restrict__ arg1)
{
int idx;
int64_t result = 0;
for (idx = 0; idx < 416; idx += 1)
result += arg1[idx] << (arg1[idx] == arg1[idx]);
return result;
}
/* { dg-final { cleanup-tree-dump "vect" } } */

8
gcc/tree-vect-patterns.c
View file

@ -1088,6 +1088,7 @@ vect_recog_over_widening_pattern (VEC (gimple, heap) **stmts,
tree var = NULL_TREE, new_type = NULL_TREE, tmp, new_oprnd;
bool first;
struct loop *loop = (gimple_bb (stmt))->loop_father;
tree type = NULL;
first = true;
while (1)
@ -1150,6 +1151,7 @@ vect_recog_over_widening_pattern (VEC (gimple, heap) **stmts,
print_gimple_stmt (vect_dump, pattern_stmt, 0, TDF_SLIM);
}
type = gimple_expr_type (stmt);
prev_stmt = stmt;
stmt = use_stmt;
@ -1165,9 +1167,11 @@ 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. */
/* Support only type promotion or signedess change. Check that USE_TYPE
is not bigger than the original type. */
if (!INTEGRAL_TYPE_P (use_type)
|| TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type))
|| TYPE_PRECISION (new_type) > TYPE_PRECISION (use_type)
|| TYPE_PRECISION (type) < TYPE_PRECISION (use_type))
return NULL;
if (TYPE_UNSIGNED (new_type) != TYPE_UNSIGNED (use_type)