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[PATCH] Fix PR69574
- From: Richard Biener <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Mon, 1 Feb 2016 16:36:33 +0100 (CET)
- Subject: [PATCH] Fix PR69574
- Authentication-results: sourceware.org; auth=none
I've bootstrapped and tested the followgn safe patch on
x86_64-unknown-linux-gnu.
Applied.
Richard.
2016-02-01 Richard Biener <rguenther@suse.de>
PR tree-optimization/69574
* tree-chrec.c (hide_evolution_in_other_loops_than_loop): Instead
of asserting return chrec_dont_know.
* gcc.dg/torture/pr69574.c: New testcase.
Index: gcc/tree-chrec.c
===================================================================
*** gcc/tree-chrec.c (revision 233033)
--- gcc/tree-chrec.c (working copy)
*************** hide_evolution_in_other_loops_than_loop
*** 728,739 ****
/* There is no evolution in this loop. */
return initial_condition (chrec);
else
! {
! gcc_assert (flow_loop_nested_p (loop, chloop));
! return hide_evolution_in_other_loops_than_loop (CHREC_LEFT (chrec),
! loop_num);
! }
default:
return chrec;
--- 728,739 ----
/* There is no evolution in this loop. */
return initial_condition (chrec);
+ else if (flow_loop_nested_p (loop, chloop))
+ return hide_evolution_in_other_loops_than_loop (CHREC_LEFT (chrec),
+ loop_num);
+
else
! return chrec_dont_know;
default:
return chrec;
Index: gcc/testsuite/gcc.dg/torture/pr69574.c
===================================================================
*** gcc/testsuite/gcc.dg/torture/pr69574.c (revision 0)
--- gcc/testsuite/gcc.dg/torture/pr69574.c (working copy)
***************
*** 0 ****
--- 1,15 ----
+ /* { dg-do compile } */
+
+ typedef unsigned mytype;
+
+ struct S {
+ mytype *pu;
+ };
+
+ mytype f(struct S *e)
+ {
+ mytype x;
+ if(&x != e->pu)
+ __builtin_memcpy(&x, e->pu, sizeof(unsigned));
+ return x;
+ }