From: Martin Liska <mliska@suse.cz>
Date: Fri, 16 Mar 2018 14:53:24 +0000 (+0100)
Subject: Properly redirect alias for MVC (PR ipa/84722).
X-Git-Tag: basepoints/gcc-9~643
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=a9a98049847fd8bafbb352818dd3ac86ff6ebf07;p=thirdparty%2Fgcc.git

Properly redirect alias for MVC (PR ipa/84722).

2018-03-16  Martin Liska  <mliska@suse.cz>

	PR ipa/84722
	* multiple_target.c (create_dispatcher_calls): Redirect also
	an alias.
2018-03-16  Martin Liska  <mliska@suse.cz>

	PR ipa/84722
	* gcc.target/i386/mvc10.c: New test.

From-SVN: r258595
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 627700ae9bd3..96b45d4d2f75 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-03-16  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/84722
+	* multiple_target.c (create_dispatcher_calls): Redirect also
+	an alias.
+
 2018-03-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/79937
diff --git a/gcc/multiple_target.c b/gcc/multiple_target.c
index a67679857743..95297f3cd307 100644
--- a/gcc/multiple_target.c
+++ b/gcc/multiple_target.c
@@ -145,6 +145,13 @@ create_dispatcher_calls (struct cgraph_node *node)
 		    walk_gimple_stmt (&it, NULL, replace_function_decl, &wi);
 		}
 	    }
+	  else if (ref->use == IPA_REF_ALIAS)
+	    {
+	      symtab_node *source = ref->referring;
+	      ref->remove_reference ();
+	      source->create_reference (inode, IPA_REF_ALIAS);
+	      source->add_to_same_comdat_group (inode);
+	    }
 	  else
 	    gcc_unreachable ();
 	}
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ff2ac8b33bed..d4fbd1b94e5b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-03-16  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/84722
+	* gcc.target/i386/mvc10.c: New test.
+
 2018-03-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/79937
diff --git a/gcc/testsuite/gcc.target/i386/mvc10.c b/gcc/testsuite/gcc.target/i386/mvc10.c
new file mode 100644
index 000000000000..9a7b609c0b37
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/mvc10.c
@@ -0,0 +1,16 @@
+/* PR ipa/84722.  */
+/* { dg-do run } */
+/* { dg-require-ifunc "" } */
+
+__attribute__ ((target_clones ("avx", "arch=core-avx2", "default"))) int
+foo (int i)
+{
+  return i - 1;
+}
+int weaks (int i) __attribute__ ((weak, alias ("foo")));
+
+int
+main (int argc, char **argv)
+{
+  return weaks (argc);
+}