re PR tree-optimization/70169 (ICE at -O1 and above on x86_64-linux-gnu in gen_lsm_tmp_name, at tree-ssa-loop.c:791)

PR tree-optimization/70169
	* tree-ssa-loop.c (gen_lsm_tmp_name): Handle FUNCTION_DECL and
	LABEL_DECL like VAR_DECL.  Emit nothing instead of gcc_unreachable
	for unknown codes.

	* gcc.dg/pr70169.c: New test.

From-SVN: r234136

gcc/ChangeLog

@@ -1,3 +1,10 @@
+2016-03-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/70169
+	* tree-ssa-loop.c (gen_lsm_tmp_name): Handle FUNCTION_DECL and
+	LABEL_DECL like VAR_DECL.  Emit nothing instead of gcc_unreachable
+	for unknown codes.
+
 2016-03-11  Ilya Enkovich  <enkovich.gnu@gmail.com>
 	    Jakub Jelinek  <jakub@redhat.com>
 

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2016-03-11  Jakub Jelinek  <jakub@redhat.com>
+
+	PR tree-optimization/70169
+	* gcc.dg/pr70169.c: New test.
+
 2016-03-11  Ilya Enkovich  <enkovich.gnu@gmail.com>
 
 	PR target/70160

gcc/testsuite/gcc.dg/pr70169.c

@@ -0,0 +1,40 @@
+/* PR tree-optimization/70169 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -fno-strict-aliasing -fno-tree-dce" } */
+
+int printf (const char *, ...); 
+
+void
+foo ()
+{
+  unsigned char *p = (unsigned char *) &printf;
+  for (;;)
+    (*p)++;
+}
+
+void
+bar (int x)
+{
+  unsigned char *p = (unsigned char *) &printf;
+  int i;
+  for (i = 0; i < x; i++)
+    (*p)++;
+}
+
+void
+baz (int x, int y)
+{
+  unsigned char *p = (unsigned char *) &&lab;
+  int i;
+  if (y)
+    {
+      for (i = 0; i < x; i++)
+	(*p)++;
+    }
+  else
+    {
+     lab:
+      asm volatile ("");
+      foo ();
+    }
+}

gcc/tree-ssa-loop.c

@@ -769,6 +769,8 @@ gen_lsm_tmp_name (tree ref)
     case SSA_NAME:
     case VAR_DECL:
     case PARM_DECL:
+    case FUNCTION_DECL:
+    case LABEL_DECL:
       name = get_name (ref);
       if (!name)
 	name = "D";
@@ -784,11 +786,9 @@ gen_lsm_tmp_name (tree ref)
       break;
 
     case INTEGER_CST:
+    default:
       /* Nothing.  */
       break;
-
-    default:
-      gcc_unreachable ();
     }
 }