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tree-ssa: Fix ICE in build_vector_type [PR93780] 

The following testcase ICEs, because execute_update_addresses_taken attempts
to create a VECTOR_TYPE with non-power of 2 number of elts.
Fixed by guarding it with the corresponding predicate.

2020-02-18  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/93780
	* tree-ssa.c (non_rewritable_lvalue_p): Check valid_vector_subparts_p
	before calling build_vector_type.
	(execute_update_addresses_taken): Likewise.

	* gcc.dg/pr93780.c: New test.
This commit is contained in:
Jakub Jelinek 2020-02-18 09:07:15 +01:00
parent 8def1d525c
commit be7c145ad5
4 changed files with 30 additions and 3 deletions
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5
gcc/ChangeLog
View File

@ -1,5 +1,10 @@
2020-02-18 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/93780
* tree-ssa.c (non_rewritable_lvalue_p): Check valid_vector_subparts_p
before calling build_vector_type.
(execute_update_addresses_taken): Likewise.
PR driver/93796
* params.opt (-param=ipa-max-switch-predicate-bounds=): Fix help
typo, functoin -> function.

7
gcc/testsuite/ChangeLog
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@ -1,9 +1,14 @@
2020-02-18 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/93780
* gcc.dg/pr93780.c: New test.
2020-02-17 David Malcolm <dmalcolm@redhat.com>
PR analyzer/93775
* gcc.dg/analyzer/20020129-1.c: New test.
2020-02-17 Alexandre Oliva <oliva@adacore.com>
2020-02-17 Alexandre Oliva <oliva@adacore.com>
* gcc.dg/tls/emutls-3.c: New, combining emutls-2.c and
thr-init-2.c into an execution test with explicitly common

15
gcc/testsuite/gcc.dg/pr93780.c Normal file
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@ -0,0 +1,15 @@
/* PR tree-optimization/93780 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-additional-options "-mavx" { target avx } } */
typedef float V __attribute__((vector_size (32)));
float
foo (void)
{
const float init[6] = {};
V v = {};
__builtin_memcpy (&v, init, sizeof (init));
return v[0];
}

6
gcc/tree-ssa.c
View File

@ -1550,7 +1550,8 @@ non_rewritable_lvalue_p (tree lhs)
&& multiple_p (lhs_bits,
tree_to_uhwi
(TYPE_SIZE (TREE_TYPE (TREE_TYPE (decl)))),
&nelts))
&nelts)
&& valid_vector_subparts_p (nelts))
{
if (known_eq (nelts, 1u))
return false;
@ -1925,7 +1926,8 @@ execute_update_addresses_taken (void)
(TYPE_SIZE (TREE_TYPE
(TREE_TYPE (sym)))),
&nelts)
&& maybe_ne (nelts, 1u))
&& maybe_ne (nelts, 1u)
&& valid_vector_subparts_p (nelts))
temtype = build_vector_type (temtype, nelts);
tree tem = make_ssa_name (temtype);
gimple *pun