Hello.
Not being expert in multi_target area, however it consists of 2 passes. The
first
one (ipa_target_clone) is responsible for creation of multiple targets for
functions
decorated with __attribute__((target_clones("xxx"))). I guess the pass should be
called just in LGEN phase and consecutive clone materialization takes care of
these
clones. I'm also adding lto test-case.
Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.
mvc test-cases work find on x86_64-linux-gnu.
Ready to be installed?
Martin
>From 7ec7045680e10838c43b2713a4fa34b205ba5004 Mon Sep 17 00:00:00 2001
From: marxin <mli...@suse.cz>
Date: Fri, 13 Jan 2017 15:26:45 +0100
Subject: [PATCH] Make multiple_target.c aware of LTO (PR lto/66295)
gcc/ChangeLog:
2017-01-13 Martin Liska <mli...@suse.cz>
PR lto/66295
* multiple_target.c (pass_target_clone::gate): Run the pass
just in LGEN (in LTO mode).
gcc/testsuite/ChangeLog:
2017-01-13 Martin Liska <mli...@suse.cz>
PR lto/66295
* gcc.target/i386/mvc9.c: New test.
---
gcc/multiple_target.c | 2 +-
gcc/testsuite/gcc.target/i386/mvc9.c | 29 +++++++++++++++++++++++++++++
2 files changed, 30 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/i386/mvc9.c
diff --git a/gcc/multiple_target.c b/gcc/multiple_target.c
index 5be3980db20..3df1e297122 100644
--- a/gcc/multiple_target.c
+++ b/gcc/multiple_target.c
@@ -378,7 +378,7 @@ public:
bool
pass_target_clone::gate (function *)
{
- return true;
+ return !flag_wpa && !flag_ltrans;
}
} // anon namespace
diff --git a/gcc/testsuite/gcc.target/i386/mvc9.c b/gcc/testsuite/gcc.target/i386/mvc9.c
new file mode 100644
index 00000000000..d510b6c18b4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mvc9.c
@@ -0,0 +1,29 @@
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+/* { dg-require-effective-target lto } */
+/* { dg-options "-flto" } */
+
+__attribute__((target_clones("avx","arch=slm","arch=core-avx2","default")))
+int
+foo ()
+{
+ return -2;
+}
+
+int
+bar ()
+{
+ return 2;
+}
+
+int
+main ()
+{
+ int r = 0;
+ r += bar ();
+ r += foo ();
+ r += bar ();
+ r += foo ();
+ r += bar ();
+ return r - 2;
+}
--
2.11.0
