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[PATCH] Fix ICE on __builtin_stack_restore (PR middle-end/34134)


Hi!

This fixes ICE in __builtin_stack_restore expansion if the argument
isn't a decl, but e.g. NOP_EXPR etc.

Ok for trunk?

2007-12-03  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/34134
	* stmt.c (expand_stack_restore): Call expand_normal on var to get
	rtx for it instead of assuming it will be a VAR_DECL.

	* gcc.c-torture/compile/20071117-1.c: New test.

--- gcc/stmt.c.jj	2007-10-19 14:39:55.000000000 +0200
+++ gcc/stmt.c	2007-11-17 18:31:17.000000000 +0100
@@ -1995,7 +1995,7 @@ expand_stack_save (void)
 void
 expand_stack_restore (tree var)
 {
-  rtx sa = DECL_RTL (var);
+  rtx sa = expand_normal (var);
 
   emit_stack_restore (SAVE_BLOCK, sa, NULL_RTX);
 }
--- gcc/testsuite/gcc.c-torture/compile/20071117-1.c.jj	2007-11-17 18:35:51.000000000 +0100
+++ gcc/testsuite/gcc.c-torture/compile/20071117-1.c	2007-11-17 18:35:30.000000000 +0100
@@ -0,0 +1,13 @@
+/* PR middle-end/34134 */
+
+extern void bar (void *, int);
+
+int foo (int i)
+{
+  char *p = __builtin_stack_save ();
+  void *q = __builtin_alloca (i);
+  bar (q, i);
+  __builtin_stack_restore (p);
+  bar ("", 0);
+  return 6;
+}

	Jakub


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