https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120670
Bug ID: 120670
Summary: vector_loop caused FAIL:
go.test/test/fixedbugs/issue13160.go execution, -O2
-g
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: hubicka at ucw dot cz, ubizjak at gmail dot com
Target Milestone: ---
Target: x86-64
Created attachment 61646
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61646&action=edit
A patch to use vector_loop
On x86-64, enable vector_loop with
diff --git a/gcc/config/i386/x86-tune-costs.h
b/gcc/config/i386/x86-tune-costs.h
index b08081e37cf..b3a7cb02157 100644
--- a/gcc/config/i386/x86-tune-costs.h
+++ b/gcc/config/i386/x86-tune-costs.h
@@ -4074,10 +4074,14 @@ static stringop_algs generic_memcpy[2] = {
{libcall, {{32, loop, false}, {8192, rep_prefix_8_byte, false},
{-1, libcall, false}}}};
static stringop_algs generic_memset[2] = {
- {libcall, {{32, loop, false}, {8192, rep_prefix_4_byte, false},
- {-1, libcall, false}}},
- {libcall, {{32, loop, false}, {8192, rep_prefix_8_byte, false},
- {-1, libcall, false}}}};
+ {libcall,
+ {{256, vector_loop, true},
+ {256, unrolled_loop, true},
+ {-1, libcall, true}}},
+ {libcall,
+ {{256, vector_loop, true},
+ {256, unrolled_loop, true},
+ {-1, libcall, true}}}};
static const
struct processor_costs generic_cost = {
{
caused:
FAIL: go.test/test/fixedbugs/issue13160.go execution, -O2 -g
libgo.so.24 is miscompiled.
