[PATCH, middle-end]: Fix PR67619, ICE at -O1 and above in int_mode_for_mode, at stor-layout.c

[Uros Bizjak]

Hello!

When expanding __bultin_eh_return, its address pointers can degrade to
a modeless constant. Use copy_addr_to_reg to always give temporary
register a Pmode.

2015-09-18  Uros Bizjak  <ubiz...@gmail.com>

    PR middle-end/67619
    * except.c (expand_builtin_eh_return): Use copy_addr_to_reg to copy
    the address to a register.

testsuite/ChangeLog:

2015-09-18  Uros Bizjak  <ubiz...@gmail.com>

    PR middle-end/67619
    * gcc.dg/torture/pr67619.c: New test.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN as obvious, the patch will be backported to
other release branches in a couple of days.

Uros.

Index: testsuite/gcc.dg/torture/pr67619.c
===================================================================
--- testsuite/gcc.dg/torture/pr67619.c  (revision 0)
+++ testsuite/gcc.dg/torture/pr67619.c  (revision 0)
@@ -0,0 +1,12 @@
+/* { dg-do compile } */
+
+void
+foo ()
+{
+  unsigned long l;
+  void *p = 0; 
+
+  __builtin_unwind_init ();
+  l = 0; 
+  __builtin_eh_return (l, p);
+}
Index: except.c
===================================================================
--- except.c    (revision 227896)
+++ except.c    (working copy)
@@ -2219,7 +2219,7 @@ expand_builtin_eh_return (tree stackadj_tree ATTRI
                     VOIDmode, EXPAND_NORMAL);
   tmp = convert_memory_address (Pmode, tmp);
   if (!crtl->eh.ehr_stackadj)
-    crtl->eh.ehr_stackadj = copy_to_reg (tmp);
+    crtl->eh.ehr_stackadj = copy_addr_to_reg (tmp);
   else if (tmp != crtl->eh.ehr_stackadj)
     emit_move_insn (crtl->eh.ehr_stackadj, tmp);
 #endif
@@ -2228,7 +2228,7 @@ expand_builtin_eh_return (tree stackadj_tree ATTRI
                     VOIDmode, EXPAND_NORMAL);
   tmp = convert_memory_address (Pmode, tmp);
   if (!crtl->eh.ehr_handler)
-    crtl->eh.ehr_handler = copy_to_reg (tmp);
+    crtl->eh.ehr_handler = copy_addr_to_reg (tmp);
   else if (tmp != crtl->eh.ehr_handler)
     emit_move_insn (crtl->eh.ehr_handler, tmp);