GlobalValue: Testcase for hidden visibility and local linkage

This is a testcase for r209227, a change in LLVM that automatically sets
visibility to default when the linkage is changed to local (rather than
asserting).

What this testcase triggers is hard to reproduce otherwise:  the
`GlobalValue` is created (with non-local linkage), the visibility is set
to hidden, and then the linkage is set to local.

PR19760

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209228 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/hidden-alias-to-internal-function.c b/test/CodeGen/hidden-alias-to-internal-function.c
new file mode 100644 (file)
index 0000000..37e3765
--- /dev/null
+++ b/test/CodeGen/hidden-alias-to-internal-function.c
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-obj -o - -x c %s
+// Reproduce the crash in PR19760.
+static void foo(void) {}
+void bar(void) __attribute__((alias("foo")))
+__attribute__((visibility("hidden")));
+
+// CHECK: @bar = hidden alias void ()* @foo
+// CHECK: define internal void @foo()