The following makes sure to strip type conversions added by
build_fold_addr_expr before placing the result in a call argument.
PR tree-optimization/114246
* tree-ssa-dse.cc (increment_start_addr): Strip useless
type conversions from the adjusted address.
* gcc.dg/torture/pr114246.c: New testcase.
(cherry picked from commit
0249744a9fe0775c2c895727aeebec4c59fd5f95)
--- /dev/null
+/* { dg-do compile } */
+/* { dg-additional-options "-w" } */
+
+int a, b;
+
+void
+foo (void)
+{
+ __builtin_memcpy (&a, (char *)&b - 1, 2);
+ __builtin_memcpy (&a, &b, 1);
+}
#include "tree-ssa-loop-niter.h"
#include "cfgloop.h"
#include "tree-data-ref.h"
+#include "tree-ssa.h"
/* This file implements dead store elimination.
*where,
build_int_cst (ptr_type_node,
increment)));
+ STRIP_USELESS_TYPE_CONVERSION (*where);
}
/* STMT is builtin call that writes bytes in bitmap ORIG, some bytes are dead