[Patch] Fix PR 49309, ICE with mudflap

[Andrew Pinski]

Hi,
  The problem here is that the type of the POINTER_PLUS_EXPR is
incorrect and also the non folded version leaks to the IR.  This patch
fixes those two problems and fixes the ICE.

OK? Bootstrapped and tested on x86_64-linux-gnu with no regressions.

Thanks,
Andrew Pinski

2011-07-13  Andrew Pinski  <pins...@gmail.com>

        PR tree-opt/49309
        * tree-mudflap.c (mf_xform_derefs_1 <case MEM_REF>):
        Use fold_build2_loc instead of build2.
        Use the correct type for the new tree.

2011-07-13  Andrew Pinski  <pins...@gmail.com>

        PR tree-opt/49309
        * g++.dg/torture/pr49309.C: New testcase.

Index: ChangeLog
===================================================================
--- ChangeLog   (revision 176249)
+++ ChangeLog   (working copy)
@@ -1,3 +1,10 @@
+2011-07-13  Andrew Pinski  <pins...@gmail.com>
+
+       PR tree-opt/49309
+       * tree-mudflap.c (mf_xform_derefs_1 <case MEM_REF>):
+       Use fold_build2_loc instead of build2.
+       Use the correct type for the new tree.
+
 2011-07-13  Ulrich Weigand  <ulrich.weig...@de.ibm.com>
 
        * config/spu/spu.c (spu_init_libfuncs): Install __clrsbdi2.
Index: testsuite/ChangeLog
===================================================================
--- testsuite/ChangeLog (revision 176249)
+++ testsuite/ChangeLog (working copy)
@@ -1,3 +1,8 @@
+2011-07-13  Andrew Pinski  <pins...@gmail.com>
+
+       PR tree-opt/49309
+       * g++.dg/torture/pr49309.C: New testcase.
+
 2011-07-13  Janne Blomqvist  <j...@gcc.gnu.org>
 
        PR libfortran/49296
Index: testsuite/g++.dg/torture/pr49309.C
===================================================================
--- testsuite/g++.dg/torture/pr49309.C  (revision 0)
+++ testsuite/g++.dg/torture/pr49309.C  (revision 0)
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-fmudflap"  } */
+struct A
+{
+  int i;
+
+  A();
+  A(const A&);
+};
+
+inline void foo(A a) { a = A(); }
+
+void bar() { foo(A()); }
+
Index: tree-mudflap.c
===================================================================
--- tree-mudflap.c      (revision 176218)
+++ tree-mudflap.c      (working copy)
@@ -869,7 +869,7 @@ mf_xform_derefs_1 (gimple_stmt_iterator
       break;
 
     case MEM_REF:
-      addr = build2 (POINTER_PLUS_EXPR, TREE_TYPE (TREE_OPERAND (t, 1)),
+      addr = fold_build2_loc (location, POINTER_PLUS_EXPR, TREE_TYPE 
(TREE_OPERAND (t, 0)),
                     TREE_OPERAND (t, 0),
                     fold_convert (sizetype, TREE_OPERAND (t, 1)));
       base = addr;