re PR middle-end/52650 (FAIL: gcc.dg/torture/pr51106-2.c * (internal compiler error))

	PR middle-end/52650
	* function.c (instantiate_virtual_regs_in_insn): Don't delete invalid
	asm gotos, instead just clear their template and inputs.

From-SVN: r193846

gcc/ChangeLog

 2012-11-27  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/52650
+	* function.c (instantiate_virtual_regs_in_insn): Don't delete invalid
+	asm gotos, instead just clear their template and inputs.
+
 	PR tree-optimization/55110
 	* tree-vect-loop.c (vectorizable_reduction): Don't assert
 	that STMT_VINFO_RELATED_STMT of orig_stmt is stmt.

gcc/function.c

@@ -1738,7 +1738,18 @@ instantiate_virtual_regs_in_insn (rtx insn)
       if (!check_asm_operands (PATTERN (insn)))
 	{
 	  error_for_asm (insn, "impossible constraint in %<asm%>");
-	  delete_insn_and_edges (insn);
+	  /* For asm goto, instead of fixing up all the edges
+	     just clear the template and clear input operands
+	     (asm goto doesn't have any output operands).  */
+	  if (JUMP_P (insn))
+	    {
+	      rtx asm_op = extract_asm_operands (PATTERN (insn));
+	      ASM_OPERANDS_TEMPLATE (asm_op) = ggc_strdup ("");
+	      ASM_OPERANDS_INPUT_VEC (asm_op) = rtvec_alloc (0);
+	      ASM_OPERANDS_INPUT_CONSTRAINT_VEC (asm_op) = rtvec_alloc (0);
+	    }
+	  else
+	    delete_insn (insn);
 	}
     }
   else