re PR c++/27451 (ICE with invalid asm statement)

	PR c++/27451
	* stmt.c (expand_asm_operands): Skip asm statement with erroneous
	clobbers.

	* g++.dg/ext/asm9.C: New test.

From-SVN: r113985

gcc/ChangeLog

+2006-05-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR c++/27451
+	* stmt.c (expand_asm_operands): Skip asm statement with erroneous
+	clobbers.
+
 2006-05-22  Richard Sandiford  <richard@codesourcery.com>
 
 	PR rtl-optimization/25514

gcc/stmt.c

@@ -693,7 +693,11 @@ expand_asm_operands (tree string, tree outputs, tree inputs,
   CLEAR_HARD_REG_SET (clobbered_regs);
   for (tail = clobbers; tail; tail = TREE_CHAIN (tail))
     {
-      const char *regname = TREE_STRING_POINTER (TREE_VALUE (tail));
+      const char *regname;
+
+      if (TREE_VALUE (tail) == error_mark_node)
+	return;
+      regname = TREE_STRING_POINTER (TREE_VALUE (tail));
 
       i = decode_reg_name (regname);
       if (i >= 0 || i == -4)

gcc/testsuite/ChangeLog

+2006-05-22  Volker Reichelt  <reichelt@igpm.rwth-aachen.de>
+
+	PR c++/27451
+	* g++.dg/ext/asm9.C: New test.
+
 2006-05-22  Richard Sandiford  <richard@codesourcery.com>
 
 	PR rtl-optimization/25514

gcc/testsuite/g++.dg/ext/asm9.C

+// PR 27451
+// { dg-do compile }
+
+void foo()
+{
+  asm("" ::: X); // { dg-error "before" }
+}