1// RUN: %clang_cc1 -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
2// RUN: %clang_cc1 -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s
3// RUN: %clang_cc1 -flto -O2 -fno-inline -emit-llvm -o - -triple x86_64-apple-darwin10 %s | FileCheck %s -check-prefix=LTO
4
5// Ensure that we don't emit available_externally functions at -O0.
6// Also should not emit them at -O2, unless -flto is present in which case
7// we should preserve them for link-time inlining decisions.
8int x;
9
10inline void f0(int y) { x = y; }
11
12// CHECK-LABEL: define void @test()
13// CHECK: declare void @f0(i32)
14// LTO-LABEL: define void @test()
15// LTO: define available_externally void @f0
16void test() {
17  f0(17);
18}
19
20inline int __attribute__((always_inline)) f1(int x) {
21  int blarg = 0;
22  for (int i = 0; i < x; ++i)
23    blarg = blarg + x * i;
24  return blarg;
25}
26
27// CHECK: @test1
28// LTO: @test1
29int test1(int x) {
30  // CHECK: br i1
31  // CHECK-NOT: call {{.*}} @f1
32  // CHECK: ret i32
33  // LTO: br i1
34  // LTO-NOT: call {{.*}} @f1
35  // LTO: ret i32
36  return f1(x);
37}
38