+2014-01-30 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/59993
+ * tree-ssa-forwprop.c (associate_pointerplus): Check we
+ can propagate form the earlier stmt and avoid the transform
+ when the intermediate result is needed.
+
2014-01-30 Alangi Derick <alangiderick@gmail.com>
* README.Portability: Fix typo.
+2014-01-30 Richard Biener <rguenther@suse.de>
+
+ PR tree-optimization/59993
+ * gcc.dg/torture/pr59993.c: New testcase.
+
2014-01-30 Richard Sandiford <rdsandiford@googlemail.com>
* g++.dg/vect/pr33426-ivdep.cc, g++.dg/vect/pr33426-ivdep-2.cc,
--- /dev/null
+/* { dg-do compile } */
+
+#include <setjmp.h>
+
+extern int optind;
+jmp_buf jump_buf;
+int
+main (int argc, char **argv)
+{
+ foo (jump_buf, setjmp(jump_buf));
+ argv += optind;
+ bar(argv[1]);
+}
/* Associate (p +p off1) +p off2 as (p +p (off1 + off2)). */
ptr = gimple_assign_rhs1 (stmt);
off1 = gimple_assign_rhs2 (stmt);
- if (TREE_CODE (ptr) != SSA_NAME)
+ if (TREE_CODE (ptr) != SSA_NAME
+ || !has_single_use (ptr))
return false;
def_stmt = SSA_NAME_DEF_STMT (ptr);
if (!is_gimple_assign (def_stmt)
- || gimple_assign_rhs_code (def_stmt) != POINTER_PLUS_EXPR)
+ || gimple_assign_rhs_code (def_stmt) != POINTER_PLUS_EXPR
+ || !can_propagate_from (def_stmt))
return false;
ptr = gimple_assign_rhs1 (def_stmt);
off2 = gimple_assign_rhs2 (def_stmt);