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re PR tree-optimization/36504 (ICE when building xorg-server with -O3 -fprefetch-loop-arrays) 

PR tree-optimization/36504
	* tree-ssa-loop-prefetch.c (gather_memory_references_ref): Skip
	references without base address.

	* gcc.dg/pr36504.c: New test.

From-SVN: r137061
This commit is contained in:
Jakub Jelinek 2008-06-24 12:06:17 +02:00 committed by Jakub Jelinek
parent 190a9bd7ee
commit a80a27015e
4 changed files with 39 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2008-06-24 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/36504
* tree-ssa-loop-prefetch.c (gather_memory_references_ref): Skip
references without base address.
2008-06-23 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/PR36584

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2008-06-24 Jakub Jelinek <jakub@redhat.com>
PR tree-optimization/36504
* gcc.dg/pr36504.c: New test.
2008-06-23 Uros Bizjak <ubizjak@gmail.com>
PR middle-end/PR36584

25
gcc/testsuite/gcc.dg/pr36504.c Normal file
View File

@ -0,0 +1,25 @@
/* PR tree-optimization/36504 */
/* { dg-do compile } */
/* { dg-options "-O3 -fprefetch-loop-arrays" } */
struct A { struct { int a; } b[8]; };
struct B { int c; int d; };
struct C { struct B d; };
void bar (struct C *, int);
struct B
foo (struct C *p, struct A *e, int b)
{
struct B q;
bar (p, e->b[b].a);
return q;
}
void
baz (int b, struct A *e)
{
struct C p;
for (; b; ++b)
p.d = foo (&p, e, b);
}

3
gcc/tree-ssa-loop-prefetch.c
View File

@ -457,6 +457,9 @@ gather_memory_references_ref (struct loop *loop, struct mem_ref_group **refs,
HOST_WIDE_INT step, delta;
struct mem_ref_group *agrp;
if (get_base_address (ref) == NULL)
return false;
if (!analyze_ref (loop, &ref, &base, &step, &delta, stmt))
return false;