Hello.
Following patch is fix for PR ipa/64813. The patch was tested on a darwin target
by Dominique.
Ready for trunk?
Thanks,
Martin
>From ce1c7031e2616d840ce55559c1bc45587d64134f Mon Sep 17 00:00:00 2001
From: mliska <mli...@suse.cz>
Date: Fri, 30 Jan 2015 15:12:59 +0100
Subject: [PATCH] Handle noreturn function thunk creation.
gcc/ChangeLog:
2015-02-09 Martin Liska <mli...@suse.cz>
PR ipa/64813
* cgraphunit.c (cgraph_node::expand_thunk): Do not create
a return value for call to a function that is noreturn.
---
gcc/cgraphunit.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c
index 8280fc4..77c8dd8 100644
--- a/gcc/cgraphunit.c
+++ b/gcc/cgraphunit.c
@@ -1572,6 +1572,7 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool force_gimple_thunk)
gcall *call;
greturn *ret;
+ bool alias_is_noreturn = TREE_THIS_VOLATILE (alias);
if (in_lto_p)
get_untransformed_body ();
@@ -1608,7 +1609,7 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool force_gimple_thunk)
bsi = gsi_start_bb (bb);
/* Build call to the function being thunked. */
- if (!VOID_TYPE_P (restype))
+ if (!VOID_TYPE_P (restype) && !alias_is_noreturn)
{
if (DECL_BY_REFERENCE (resdecl))
{
@@ -1667,14 +1668,14 @@ cgraph_node::expand_thunk (bool output_asm_thunks, bool force_gimple_thunk)
callees->call_stmt = call;
gimple_call_set_from_thunk (call, true);
gimple_call_set_with_bounds (call, instrumentation_clone);
- if (restmp)
+ if (restmp && !alias_is_noreturn)
{
gimple_call_set_lhs (call, restmp);
gcc_assert (useless_type_conversion_p (TREE_TYPE (restmp),
TREE_TYPE (TREE_TYPE (alias))));
}
gsi_insert_after (&bsi, call, GSI_NEW_STMT);
- if (!(gimple_call_flags (call) & ECF_NORETURN))
+ if (!alias_is_noreturn)
{
if (restmp && !this_adjusting
&& (fixed_offset || virtual_offset))
--
2.1.2
