backport: re PR tree-optimization/70169 (ICE at -O1 and above on x86_64-linux-gnu...

	Backported from mainline
	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.

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

From-SVN: r238139

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f05665ea44c8563865fca88d3705474ca20c16f6..1abaf860f55b468b90d3a3ff29b622a28110b6c3 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,6 +1,13 @@
 2016-07-07  Jakub Jelinek  <jakub@redhat.com>
 
        Backported from mainline
+       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.
+
        2016-03-09  Jakub Jelinek  <jakub@redhat.com>
 
        PR tree-optimization/70152

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index aec652448f325adff6aa165a9ca1974ce4677399..9a70102ba3e47f056341f5b1d059c932a55c9cf7 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,6 +1,11 @@
 2016-07-07  Jakub Jelinek  <jakub@redhat.com>
 
        Backported from mainline
+       2016-03-11  Jakub Jelinek  <jakub@redhat.com>
+
+       PR tree-optimization/70169
+       * gcc.dg/pr70169.c: New test.
+
        2016-03-09  Jakub Jelinek  <jakub@redhat.com>
 
        PR tree-optimization/70152

diff --git a/gcc/testsuite/gcc.dg/pr70169.c b/gcc/testsuite/gcc.dg/pr70169.c
new file mode 100644 (file)
index 0000000..8d08f5c
--- /dev/null
+++ b/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 ();
+    }
+}

diff --git a/gcc/tree-ssa-loop.c b/gcc/tree-ssa-loop.c
index e71519acf7b9ac42bad7a9bb0d7434af63dbc3a7..aabca0f67e32cf0339079b9f2a6f6c3cb1f4509c 100644 (file)
--- a/gcc/tree-ssa-loop.c
+++ b/gcc/tree-ssa-loop.c
@@ -621,6 +621,8 @@ 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";
@@ -636,11 +638,9 @@ gen_lsm_tmp_name (tree ref)
       break;
 
     case INTEGER_CST:
+    default:
       /* Nothing.  */
       break;
-
-    default:
-      gcc_unreachable ();
     }
 }