Hi!
This patch introduces a new effective target check and adds it to the pr64612.C
- if comdat groups aren't used, there is no guarantee that the D2 dtor will
be emitted always alongside of D1 dtor.
Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
2015-01-27 Jakub Jelinek <ja...@redhat.com>
PR bootstrap/64612
* lib/target-supports.exp (check_effective_target_comdat_group): New.
* g++.dg/ipa/pr64612.C: Guard scan-assembler test with
{ target comdat_group }.
* doc/sourcebuild.texi (comdat_group): Document.
--- gcc/testsuite/lib/target-supports.exp.jj 2015-01-15 23:39:06.000000000
+0100
+++ gcc/testsuite/lib/target-supports.exp 2015-01-26 15:24:55.325236098
+0100
@@ -6198,3 +6198,13 @@ proc check_effective_target_pie_copyrelo
return $pie_copyreloc_available_saved
}
+
+# Return 1 if the target uses comdat groups.
+
+proc check_effective_target_comdat_group {} {
+ return [check_no_messages_and_pattern comdat_group
"\.section\[^\n\r]*,comdat" assembly {
+ // C++
+ inline int foo () { return 1; }
+ int (*fn) () = foo;
+ }]
+}
--- gcc/testsuite/g++.dg/ipa/pr64612.C.jj 2015-01-26 15:25:43.301410027
+0100
+++ gcc/testsuite/g++.dg/ipa/pr64612.C 2015-01-26 15:23:11.380025863 +0100
@@ -1,6 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-O3 -std=c++11" } */
-/* { dg-final { scan-assembler "_ZN5QListI7QStringED1Ev" } } */
+/* { dg-final { scan-assembler "_ZN5QListI7QStringED1Ev" { target comdat_group
} } } */
class A
{
--- gcc/doc/sourcebuild.texi.jj 2015-01-15 23:39:02.000000000 +0100
+++ gcc/doc/sourcebuild.texi 2015-01-27 16:07:37.504081520 +0100
@@ -1930,6 +1930,9 @@ Target supports @code{wchar_t} that is c
@item wchar_t_char32_t_compatible
Target supports @code{wchar_t} that is compatible with @code{char32_t}.
+
+@item comdat_group
+Target uses comdat groups.
@end table
@subsubsection Local to tests in @code{gcc.target/i386}
Jakub
