[COMMITTED] testsuite: Require lto-plugin support in gcc.dg/lto/modref-3 etc. [PR98237]

[COMMITTED] testsuite: Require lto-plugin support in gcc.dg/lto/modref-3 etc. [PR98237]

[Rainer Orth]

[-- Attachment #1: Type: text/plain, Size: 1755 bytes --]

gcc.dg/lto/modref-3 etc. FAIL on Solaris with the native linker:

FAIL: gcc-dg-lto-modref-3-01.exe scan-wpa-ipa-dump modref "parm 1 flags: no_direct_clobber no_direct_escape"
FAIL: gcc-dg-lto-modref-4-01.exe scan-wpa-ipa-dump modref "parm 1 flags: no_direct_clobber no_direct_escape"
FAIL: gcc.dg/lto/modref-3 c_lto_modref-3_0.o-c_lto_modref-3_1.o execute -O2 -flto-partition=max -fdump-ipa-modref -fno-ipa-sra -fno-ipa-cp -flto
FAIL: gcc.dg/lto/modref-4 c_lto_modref-4_0.o-c_lto_modref-4_1.o execute -O2 -flto-partition=max -fdump-ipa-modref -fno-ipa-sra -flto

The issue is that the tests require the linker plugin, which isn't
available with Solaris ld.  Thus, it also FAILs when gcc is configured
with --disable-lto-plugin.

This patch thus declares the requirement.  As it turns out, there's an
undocumented dg-require-linker-plugin already, but I introduce and use
the corresponding effective-target keyword and document both.

Given that the effective-target form is more flexible, I'm tempted to
remove dg-require-* with an empty arg as already mentioned in
sourcebuild.texi.  That is not this patch, however.

Tested on i386-pc-solaris2.11 with ld and gld.

Committed to trunk.

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University


2024-02-14  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>

	gcc/testsuite:
	PR ipa/98237
	* lib/target-supports.exp (is-effective-target): Handle
	linker_plugin.
	* gcc.dg/lto/modref-3_0.c: Require linker_plugin support.
	* gcc.dg/lto/modref-4_0.c: Likewise.

	gcc:
	* doc/sourcebuild.texi (Effective-Target Keywords, Other
	attribugs): Document linker_plugin.
	(Require Support): Document dg-require-linker-plugin.


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: testsuite-lto-plugin.patch --]
[-- Type: text/x-patch, Size: 2540 bytes --]

# HG changeset patch
# Parent  c4cd589ec9c0ac709c6678e47799d87d82fbad00
testsuite: Require lto-plugin support in gcc.dg/lto/modref-3 etc. [PR98237]

diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
--- a/gcc/doc/sourcebuild.texi
+++ b/gcc/doc/sourcebuild.texi
@@ -3009,6 +3009,9 @@ Target supports @option{-mpe-aligned-com
 @item pie
 Target supports @option{-pie}, @option{-fpie} and @option{-fPIE}.
 
+@item linker_plugin
+Target supports the linker plugin.
+
 @item rdynamic
 Target supports @option{-rdynamic}.
 
@@ -3337,6 +3340,10 @@ system.  Some tests are incompatible wit
 hosts, which involves copying the source file to the host and compiling
 it with a relative path and "@code{-o a.out}".
 
+@item dg-require-linker-plugin ""
+Skip the test is the target does not support the linker plugin.
+This is equivalent to @code{dg-require-effective-target linker_plugin}.
+
 @item dg-require-mkfifo ""
 Skip the test if the target does not support @code{mkfifo}.
 
diff --git a/gcc/testsuite/gcc.dg/lto/modref-3_0.c b/gcc/testsuite/gcc.dg/lto/modref-3_0.c
--- a/gcc/testsuite/gcc.dg/lto/modref-3_0.c
+++ b/gcc/testsuite/gcc.dg/lto/modref-3_0.c
@@ -1,5 +1,6 @@
 /* { dg-lto-do run } */
 /* { dg-lto-options { {-O2 -flto-partition=max -fdump-ipa-modref -fno-ipa-sra -fno-ipa-cp -flto} } } */
+/* { dg-require-effective-target linker_plugin } */
 extern void copy (int *a, int *b);
 extern void barrier ();
 extern int *ptr;
diff --git a/gcc/testsuite/gcc.dg/lto/modref-4_0.c b/gcc/testsuite/gcc.dg/lto/modref-4_0.c
--- a/gcc/testsuite/gcc.dg/lto/modref-4_0.c
+++ b/gcc/testsuite/gcc.dg/lto/modref-4_0.c
@@ -1,5 +1,6 @@
 /* { dg-lto-do run } */
 /* { dg-lto-options { {-O2 -flto-partition=max -fdump-ipa-modref -fno-ipa-sra -flto} } } */
+/* { dg-require-effective-target linker_plugin } */
 extern void copy (int *a, int *b);
 extern void barrier ();
 extern int *ptr;
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -9914,6 +9914,7 @@ proc is-effective-target { arg } {
 	  "htm_hw"         { set selected [check_htm_hw_available] }
 	  "named_sections" { set selected [check_named_sections_available] }
 	  "gc_sections"    { set selected [check_gc_sections_available] }
+	  "linker_plugin"  { set selected [check_linker_plugin_available] }
 	  "cxa_atexit"     { set selected [check_cxa_atexit_available] }
 	  default          { error "unknown effective target keyword `$arg'" }
 	}