https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64806
Bug ID: 64806
Summary: [5 Regression] FAIL: FAIL: g++.dg/ext/mv1.C
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
r220095 caused:
FAIL: g++.dg/ext/mv1.C -std=gnu++98 execution test
FAIL: g++.dg/ext/mv1.C -std=gnu++11 execution test
FAIL: g++.dg/ext/mv1.C -std=gnu++14 execution test
on Nehalem and Westmere machines. g++.dg/ext/mv1.C has
int __attribute__ ((target("arch=corei7,popcnt")))
foo ()
{
return 5;
}
and
int __attribute__ ((target("arch=corei7")))
foo ()
{
return 6;
}
r220095 changed the priority of P_POPCNT:
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
index 9ec40cb..441911d 100644
--- a/gcc/config/i386/i386.c
+++ b/gcc/config/i386/i386.c
@@ -34289,15 +34289,18 @@ get_builtin_code_for_version (tree decl, tree
*predica
te_list)
P_PROC_SSE4_A,
P_SSE4_1,
P_SSE4_2,
- P_PROC_SSE4_2,
P_POPCNT,
+ P_PROC_SSE4_2,
On Nehalem and Westmere machines, it selected foo for corei7 instead
of corei7,popcnt since P_PROC_SSE4_2 has the higher priority than
P_POPCNT.
