It apparently got changed when the conversion to the new create_input_operand
interface was done. This restores the simple control flow of 4.6.x and stops
the compiler when the probe cannot be generated if HAVE_check_stack, instead
of silently dropping it (but no architectures HAVE_check_stack so...).
Tested on i586-suse-linux, applied on the mainline and 4.7 branch as obvious.
2012-05-30 Eric Botcazou <ebotca...@adacore.com>
* explow.c (probe_stack_range): Restore simple control flow and stop
again when the probe cannot be generated if HAVE_check_stack.
--
Eric Botcazou
Index: explow.c
===================================================================
--- explow.c (revision 187922)
+++ explow.c (working copy)
@@ -1579,12 +1579,11 @@ probe_stack_range (HOST_WIDE_INT first,
size, first)));
emit_library_call (stack_check_libfunc, LCT_NORMAL, VOIDmode, 1, addr,
Pmode);
- return;
}
/* Next see if we have an insn to check the stack. */
#ifdef HAVE_check_stack
- if (HAVE_check_stack)
+ else if (HAVE_check_stack)
{
struct expand_operand ops[1];
rtx addr = memory_address (Pmode,
@@ -1592,10 +1591,10 @@ probe_stack_range (HOST_WIDE_INT first,
stack_pointer_rtx,
plus_constant (Pmode,
size, first)));
-
+ bool success;
create_input_operand (&ops[0], addr, Pmode);
- if (maybe_expand_insn (CODE_FOR_check_stack, 1, ops))
- return;
+ success = maybe_expand_insn (CODE_FOR_check_stack, 1, ops);
+ gcc_assert (success);
}
#endif
