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[PATCH] Fix PR69801
- From: Richard Biener <rguenther at suse dot de>
- To: gcc-patches at gcc dot gnu dot org
- Date: Tue, 16 Feb 2016 09:35:25 +0100 (CET)
- Subject: [PATCH] Fix PR69801
- Authentication-results: sourceware.org; auth=none
Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.
Richard.
2016-02-16 Richard Biener <rguenther@suse.de>
PR middle-end/69801
* fold-const.c (operand_equal_p): For COND_EXPR zero operand
mask OEP_ADDRESS_OF.
* gcc.dg/pr69801.c: New testcase.
Index: gcc/fold-const.c
===================================================================
*** gcc/fold-const.c (revision 233418)
--- gcc/fold-const.c (working copy)
*************** operand_equal_p (const_tree arg0, const_
*** 3118,3123 ****
--- 3118,3128 ----
TREE_OPERAND (arg1, 0), flags));
case COND_EXPR:
+ if (! OP_SAME (1) || ! OP_SAME (2))
+ return 0;
+ flags &= ~OEP_ADDRESS_OF;
+ return OP_SAME (0);
+
case VEC_COND_EXPR:
case DOT_PROD_EXPR:
return OP_SAME (0) && OP_SAME (1) && OP_SAME (2);
Index: gcc/testsuite/gcc.dg/pr69801.c
===================================================================
*** gcc/testsuite/gcc.dg/pr69801.c (revision 0)
--- gcc/testsuite/gcc.dg/pr69801.c (working copy)
***************
*** 0 ****
--- 1,7 ----
+ /* { dg-do compile } */
+
+ struct {
+ char c[1];
+ } b, c;
+ int d, e;
+ void fn1() { e ? (d ? b : c).c : (d ? b : c).c; }