[PATCH] Handle noipa attribute in IPA visibility (PR ipa/83594).

[Martin Liška]

Hi.

As we introduced noipa attribute, I believe proper fix to not to crash
is to ignore all functions with the attribute in iteration of IPA visibility
pass.

Patch can bootstrap on ppc64le-redhat-linux and survives regression tests.

Ready to be installed?
Martin

gcc/ChangeLog:

2017-12-27  Martin Liska  <mli...@suse.cz>

        PR ipa/83594
        * ipa-visibility.c (function_and_variable_visibility): Skip
        functions with noipa attribure.

gcc/testsuite/ChangeLog:

2017-12-27  Martin Liska  <mli...@suse.cz>

        PR ipa/83594
        * gcc.dg/ipa/pr83594.c: New test.
---
 gcc/ipa-visibility.c               | 3 ++-
 gcc/testsuite/gcc.dg/ipa/pr83594.c | 5 +++++
 2 files changed, 7 insertions(+), 1 deletion(-)
 create mode 100644 gcc/testsuite/gcc.dg/ipa/pr83594.c



diff --git a/gcc/ipa-visibility.c b/gcc/ipa-visibility.c
index b6bc870b11d..9f136d9069c 100644
--- a/gcc/ipa-visibility.c
+++ b/gcc/ipa-visibility.c
@@ -623,7 +623,8 @@ function_and_variable_visibility (bool whole_program)
     {
       if (node->get_availability () != AVAIL_INTERPOSABLE
 	  || DECL_EXTERNAL (node->decl)
-	  || node->has_aliases_p ())
+	  || node->has_aliases_p ()
+	  || lookup_attribute ("noipa", DECL_ATTRIBUTES (node->decl)))
 	continue;
 
       cgraph_node *alias = 0;
diff --git a/gcc/testsuite/gcc.dg/ipa/pr83594.c b/gcc/testsuite/gcc.dg/ipa/pr83594.c
new file mode 100644
index 00000000000..1927c636ec0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/ipa/pr83594.c
@@ -0,0 +1,5 @@
+__attribute__((noipa))
+void foo ()
+{
+  foo ();
+}