From: Jakub Jelinek <jakub@redhat.com>
Date: Thu, 12 Aug 2010 09:04:48 +0000 (+0200)
Subject: re PR debug/45259 (ICE in save_call_clobbered_regs)
X-Git-Tag: releases/gcc-4.6.0~5034
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=49b48605c822542b0ce623db4d5188ed3ae79401;p=thirdparty%2Fgcc.git

re PR debug/45259 (ICE in save_call_clobbered_regs)

	PR debug/45259
	* caller-save.c (save_call_clobbered_regs): Only swap notes with
	DEBUG_INSNs if n_regs_saved.

	* gcc.dg/pr45259.c: New test.

From-SVN: r163185
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d55ddbe40121..fff6268ff634 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-08-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/45259
+	* caller-save.c (save_call_clobbered_regs): Only swap notes with
+	DEBUG_INSNs if n_regs_saved.
+
 2010-08-12  Wei Guozhi  <carrot@google.com>
 
 	PR target/44999
diff --git a/gcc/caller-save.c b/gcc/caller-save.c
index 446da51acdf4..9ca8592bf34c 100644
--- a/gcc/caller-save.c
+++ b/gcc/caller-save.c
@@ -868,7 +868,10 @@ save_call_clobbered_regs (void)
 	     remain saved.  If the last insn in the block is a JUMP_INSN, put
 	     the restore before the insn, otherwise, put it after the insn.  */
 
-	  if (DEBUG_INSN_P (insn) && last && last->block == chain->block)
+	  if (n_regs_saved
+	      && DEBUG_INSN_P (insn)
+	      && last
+	      && last->block == chain->block)
 	    {
 	      rtx ins, prev;
 	      basic_block bb = BLOCK_FOR_INSN (insn);
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 6ac7bbac087d..84bd311b8999 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2010-08-12  Jakub Jelinek  <jakub@redhat.com>
+
+	PR debug/45259
+	* gcc.dg/pr45259.c: New test.
+
 2010-08-12  Wei Guozhi  <carrot@google.com>
 
 	PR target/44999
diff --git a/gcc/testsuite/gcc.dg/pr45259.c b/gcc/testsuite/gcc.dg/pr45259.c
new file mode 100644
index 000000000000..b8dc36503f8c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr45259.c
@@ -0,0 +1,42 @@
+/* PR debug/45259 */
+/* { dg-do compile } */
+/* { dg-options "-g -O2 -fpic -w" { target fpic } } */
+
+struct S { void (*bar) (long); };
+struct T { struct S *t; };
+int w;
+extern int baz (int);
+
+void
+foo (int x, int u, char *z)
+{
+  struct T *v;
+  static void *y[256] = { &&l1, &&l2 };
+  for (;;)
+    switch (x)
+      {
+      l2:
+	x = 9;
+      case 9:
+	goto *y[*z++];
+      case 10:
+      case 27:
+      case 54:
+      case 99:
+      case 100:
+      case 120:
+      case 122:
+      case 131:
+      case 132:
+      case 134:
+      case 141:
+      case 142:
+	v->t->bar (u);
+	v->t->bar (u);
+      case 143:
+	continue;
+      l1:
+      default:
+	baz (w);
+      }
+}