[PATCH] Fix PR58532

[Richard Biener]

This fixes PR58532, a bootstrap-debug issue with -O3.  Debug stmts
got in the way of adding abnormal edges during inlining.

Bootstrapped on x86_64-unkown-linux-gnu (with -O3 and default flags),
committed to trunk.

Richard.

2013-09-30  Richard Biener  <rguent...@suse.de>

        PR middle-end/58532
        * tree-cfg.c (make_abnormal_goto_edges): Skip debug statements
        before looking for setjmp-like calls.

        * g++.dg/torture/pr58552.C: New testcase.

Index: gcc/tree-cfg.c
===================================================================
--- gcc/tree-cfg.c      (revision 202971)
+++ gcc/tree-cfg.c      (working copy)
@@ -1013,6 +1013,9 @@ make_abnormal_goto_edges (basic_block bb
              break;
            }
        }
+      if (!gsi_end_p (gsi)
+         && is_gimple_debug (gsi_stmt (gsi)))
+       gsi_next_nondebug (&gsi);
       if (!gsi_end_p (gsi))
        {
          /* Make an edge to every setjmp-like call.  */
Index: gcc/testsuite/g++.dg/torture/pr58552.C
===================================================================
--- gcc/testsuite/g++.dg/torture/pr58552.C      (revision 0)
+++ gcc/testsuite/g++.dg/torture/pr58552.C      (working copy)
@@ -0,0 +1,29 @@
+// { dg-do compile }
+// { dg-additional-options "-fcompare-debug" }
+
+extern void fancy_abort () __attribute__ ((__noreturn__));
+extern "C" {
+    struct __jmp_buf_tag { };
+    typedef struct __jmp_buf_tag jmp_buf[1];
+    extern int _setjmp (struct __jmp_buf_tag __env[1]) throw ();
+}
+extern void *gfc_state_stack;
+static jmp_buf eof_buf;
+static void push_state ()
+{
+  if (!gfc_state_stack)
+    fancy_abort ();
+}
+bool gfc_parse_file (void)
+{
+  int seen_program=0;
+  if (_setjmp (eof_buf))
+    return false;
+  if (seen_program)
+    goto duplicate_main;
+  seen_program = 1;
+  push_state ();
+  push_state ();
+duplicate_main:
+  return true;
+}