Revision: 128838
Author: johannes
Date: 2007-06-26 09:45:24 -0700 (Tue, 26 Jun 2007)
Log Message:
-----------
Don't assume &P[0] is nonnull in LLVM.
Modified Paths:
--------------
apple-local/branches/llvm/gcc/c-common.c
Modified: apple-local/branches/llvm/gcc/c-common.c
===================================================================
--- apple-local/branches/llvm/gcc/c-common.c 2007-06-26 15:41:13 UTC (rev
128837)
+++ apple-local/branches/llvm/gcc/c-common.c 2007-06-26 16:45:24 UTC (rev
128838)
@@ -2636,6 +2636,18 @@
&& DECL_EXTERNAL (TREE_OPERAND (expr, 0)))
break;
+/* APPLE LOCAL begin llvm */
+#if ENABLE_LLVM
+ /* LLVM extends ARRAY_REF to allow pointers to be the base value. It
is not
+ valid to assume ADDR of this is nonzero, because it could be
derived from
+ original (P+constant). Radar 5286401. */
+ if (TREE_CODE (TREE_OPERAND (expr, 0)) == ARRAY_REF
+ && TREE_CODE (TREE_TYPE (TREE_OPERAND (TREE_OPERAND (expr, 0),
0)))
+ != ARRAY_TYPE)
+ break;
+#endif
+/* APPLE LOCAL end llvm */
+
if (TREE_SIDE_EFFECTS (TREE_OPERAND (expr, 0)))
return build2 (COMPOUND_EXPR, truthvalue_type_node,
TREE_OPERAND (expr, 0), truthvalue_true_node);
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