Link symbols with different visibilities according to the rules in the

System V Application Binary Interface. This lets us use
-fvisibility-inlines-hidden with LTO.
Fixes PR11697.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147624 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 73 insertions, 0 deletions

diff --git a/test/Linker/visibility1.ll b/test/Linker/visibility1.ll
new file mode 100644
index 0000000000..131f6d59b5
--- /dev/null
+++ b/test/Linker/visibility1.ll
@@ -0,0 +1,46 @@
+; RUN: llvm-link %s %p/visibility2.ll -S | FileCheck %s
+; RUN: llvm-link %p/visibility2.ll %s -S | FileCheck %s
+
+; The values in this file are strong, the ones in visibility2.ll are weak,
+; but we should still get the visibility from them.
+
+; Variables
+; CHECK: @v1 = hidden global i32 0
+@v1 = global i32 0
+
+; CHECK: @v2 = protected  global i32 0
+@v2 = global i32 0
+
+; CHECK: @v3 = hidden global i32 0
+@v3 = protected global i32 0
+
+
+; Aliases
+; CHECK: @a1 = hidden alias i32* @v1
+@a1 = alias i32* @v1
+
+; CHECK: @a2 = protected alias i32* @v2
+@a2 = alias i32* @v2
+
+; CHECK: @a3 = hidden alias i32* @v3
+@a3 = protected alias i32* @v3
+
+
+; Functions
+; CHECK: define hidden void @f1()
+define void @f1()  {
+entry:
+  ret void
+}
+
+; CHECK: define protected void @f2()
+define void @f2()  {
+entry:
+  ret void
+}
+
+; CHECK: define hidden void @f3()
+define protected void @f3()  {
+entry:
+  ret void
+}
diff --git a/test/Linker/visibility2.ll b/test/Linker/visibility2.ll
new file mode 100644
index 0000000000..e6363ca2f3
--- /dev/null
+++ b/test/Linker/visibility2.ll
@@ -0,0 +1,27 @@
+; This file is used by visibility1.ll, so it doesn't actually do anything itself
+;
+; RUN: true
+
+; Variables
+@v1 = weak hidden global i32 0
+@v2 = weak protected global i32 0
+@v3 = weak hidden global i32 0
+
+; Aliases
+@a1 = hidden alias weak i32* @v1
+@a2 = protected alias weak i32* @v2
+@a3 = hidden alias weak i32* @v3
+
+; Functions
+define weak hidden void @f1() {
+entry:
+  ret void
+}
+define weak protected void @f2() {
+entry:
+  ret void
+}
+define weak hidden void @f3() {
+entry:
+  ret void
+}