InstrProf: Test for appropriate linkage of the profiling structures

This test checks that the symbols instrprof creates have appropriate
linkage. The tests already exist in clang in a slightly different form
from before we sunk profile generation into an LLVM pass, but that's
an awkward place for them now. I'll remove/simplify the clang versions
shortly.

llvm-svn: 230383

1 files changed, 46 insertions, 0 deletions

diff --git a/llvm/test/Instrumentation/InstrProfiling/linkage.ll b/llvm/test/Instrumentation/InstrProfiling/linkage.ll
new file mode 100644
index 00000000000..0e3dd05510a
--- /dev/null
+++ b/llvm/test/Instrumentation/InstrProfiling/linkage.ll
@@ -0,0 +1,46 @@
+;; Check that runtime symbols get appropriate linkage.
+
+; RUN: opt < %s -mtriple=x86_64-apple-macosx10.10.0 -instrprof -S | FileCheck %s
+; RUN: opt < %s -mtriple=x86_64-unknown-linux -instrprof -S | FileCheck %s
+
+@__llvm_profile_name_foo = hidden constant [3 x i8] c"foo"
+@__llvm_profile_name_foo_weak = weak hidden constant [8 x i8] c"foo_weak"
+@"__llvm_profile_name_linkage.ll:foo_internal" = internal constant [23 x i8] c"linkage.ll:foo_internal"
+@__llvm_profile_name_foo_inline = linkonce_odr hidden constant [10 x i8] c"foo_inline"
+
+; CHECK: @__llvm_profile_counters_foo = hidden global
+; CHECK: @__llvm_profile_data_foo = hidden constant
+define void @foo() {
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([3 x i8]* @__llvm_profile_name_foo, i32 0, i32 0), i64 0, i32 1, i32 0)
+  ret void
+}
+
+; CHECK: @__llvm_profile_counters_foo_weak = weak hidden global
+; CHECK: @__llvm_profile_data_foo_weak = weak hidden constant
+define weak void @foo_weak() {
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([8 x i8]* @__llvm_profile_name_foo_weak, i32 0, i32 0), i64 0, i32 1, i32 0)
+  ret void
+}
+
+; CHECK: @"__llvm_profile_counters_linkage.ll:foo_internal" = internal global
+; CHECK: @"__llvm_profile_data_linkage.ll:foo_internal" = internal constant
+define internal void @foo_internal() {
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([23 x i8]* @"__llvm_profile_name_linkage.ll:foo_internal", i32 0, i32 0), i64 0, i32 1, i32 0)
+  ret void
+}
+
+; CHECK: @__llvm_profile_counters_foo_inline = linkonce_odr hidden global
+; CHECK: @__llvm_profile_data_foo_inline = linkonce_odr hidden constant
+define linkonce_odr void @foo_inline() {
+  call void @llvm.instrprof.increment(i8* getelementptr inbounds ([10 x i8]* @__llvm_profile_name_foo_inline, i32 0, i32 0), i64 0, i32 1, i32 0)
+  ret void
+}
+
+declare void @llvm.instrprof.increment(i8*, i64, i32, i32)
+
+; CHECK: @__llvm_profile_runtime = external global i32
+
+; CHECK: define linkonce_odr i32 @__llvm_profile_runtime_user() {{.*}} {
+; CHECK:   %[[REG:.*]] = load i32* @__llvm_profile_runtime
+; CHECK:   ret i32 %[[REG]]
+; CHECK: }