re PR middle-end/17965 (ice in expand_call)

	PR middle-end/17965
	* calls.c (expand_call, emit_library_call_value_1): Use xmalloc/free
	instead of alloca for really big argument sizes.

	* gcc.c-torture/compile/20050622-1.c: New test.

From-SVN: r101333

gcc/ChangeLog

 2005-06-26  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/17965
+	* calls.c (expand_call, emit_library_call_value_1): Use xmalloc/free
+	instead of alloca for really big argument sizes.
+
 	PR middle-end/22028
 	* gimplify.c (gimplify_type_sizes): Check for type == error_mark_node
 	earlier in the function.

gcc/calls.c

@@ -1864,6 +1864,7 @@ expand_call (tree exp, rtx target, int ignore)
 
   int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
   char *initial_stack_usage_map = stack_usage_map;
+  char *stack_usage_map_buf = NULL;
 
   int old_stack_allocated;
 
@@ -2350,7 +2351,10 @@ expand_call (tree exp, rtx target, int ignore)
 		  highest_outgoing_arg_in_use = MAX (initial_highest_arg_in_use,
 						     needed);
 #endif
-		  stack_usage_map = alloca (highest_outgoing_arg_in_use);
+		  if (stack_usage_map_buf)
+		    free (stack_usage_map_buf);
+		  stack_usage_map_buf = xmalloc (highest_outgoing_arg_in_use);
+		  stack_usage_map = stack_usage_map_buf;
 
 		  if (initial_highest_arg_in_use)
 		    memcpy (stack_usage_map, initial_stack_usage_map,
@@ -2455,7 +2459,10 @@ expand_call (tree exp, rtx target, int ignore)
 		    = stack_arg_under_construction;
 		  stack_arg_under_construction = 0;
 		  /* Make a new map for the new argument list.  */
-		  stack_usage_map = alloca (highest_outgoing_arg_in_use);
+		  if (stack_usage_map_buf)
+		    free (stack_usage_map_buf);
+		  stack_usage_map_buf = xmalloc (highest_outgoing_arg_in_use);
+		  stack_usage_map = stack_usage_map_buf;
 		  memset (stack_usage_map, 0, highest_outgoing_arg_in_use);
 		  highest_outgoing_arg_in_use = 0;
 		}
@@ -3009,6 +3016,9 @@ expand_call (tree exp, rtx target, int ignore)
       emit_move_insn (virtual_stack_dynamic_rtx, stack_pointer_rtx);
     }
 
+  if (stack_usage_map_buf)
+    free (stack_usage_map_buf);
+
   return target;
 }
 
@@ -3203,6 +3213,7 @@ emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
   /* Size of the stack reserved for parameter registers.  */
   int initial_highest_arg_in_use = highest_outgoing_arg_in_use;
   char *initial_stack_usage_map = stack_usage_map;
+  char *stack_usage_map_buf = NULL;
 
   rtx struct_value = targetm.calls.struct_value_rtx (0, 0);
 
@@ -3481,7 +3492,8 @@ emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
       highest_outgoing_arg_in_use = MAX (initial_highest_arg_in_use,
 					 needed);
 #endif
-      stack_usage_map = alloca (highest_outgoing_arg_in_use);
+      stack_usage_map_buf = xmalloc (highest_outgoing_arg_in_use);
+      stack_usage_map = stack_usage_map_buf;
 
       if (initial_highest_arg_in_use)
 	memcpy (stack_usage_map, initial_stack_usage_map,
@@ -3835,6 +3847,9 @@ emit_library_call_value_1 (int retval, rtx orgfun, rtx value,
       stack_usage_map = initial_stack_usage_map;
     }
 
+  if (stack_usage_map_buf)
+    free (stack_usage_map_buf);
+
   return value;
 
 }

gcc/testsuite/ChangeLog

 2005-06-26  Jakub Jelinek  <jakub@redhat.com>
 
+	PR middle-end/17965
+	* gcc.c-torture/compile/20050622-1.c: New test.
+
 	PR middle-end/22028
 	* gcc.dg/20050620-1.c: New test.
 

gcc/testsuite/gcc.c-torture/compile/20050622-1.c

+#if __SCHAR_MAX__ == 127 && __INT_MAX__ >= 2147483647
+struct S { char buf[72*1024*1024]; };
+#else
+struct S { char buf[64]; };
+#endif
+
+extern void bar (struct S);
+
+struct S s;
+
+int
+foo (void)
+{
+  bar (s);
+  return 0;
+}