xref: /llvm-project/llvm/test/Transforms/GlobalOpt/preserve-comdats.ll (revision d586bd5ca231a6022f439d4c6e43cfeeb53eb1d6) 
1; RUN: opt -passes=globalopt -S < %s | FileCheck %s
2
3$comdat_global = comdat any
4
5@comdat_global = weak_odr global i8 0, comdat($comdat_global)
6@simple_global = internal global i8 0
7; CHECK: @comdat_global = weak_odr global i8 0, comdat{{$}}
8; CHECK: @simple_global = internal global i8 42
9
10@llvm.global_ctors = appending global [2 x { i32, ptr, ptr }] [
11    { i32, ptr, ptr } { i32 65535, ptr @init_comdat_global, ptr @comdat_global },
12    { i32, ptr, ptr } { i32 65535, ptr @init_simple_global, ptr null }
13]
14; CHECK: @llvm.global_ctors = appending global [1 x { i32, ptr, ptr }]
15; CHECK: [{ i32, ptr, ptr } { i32 65535, ptr @init_comdat_global, ptr @comdat_global }]
16
17define void @init_comdat_global() {
18  store i8 42, ptr @comdat_global
19  ret void
20}
21; CHECK: define void @init_comdat_global()
22
23define internal void @init_simple_global() comdat($comdat_global) {
24  store i8 42, ptr @simple_global
25  ret void
26}
27; CHECK-NOT: @init_simple_global()
28
29define ptr @use_simple() {
30  ret ptr @simple_global
31}
32; CHECK: define ptr @use_simple()
33
34define ptr @use_comdat() {
35  ret ptr @comdat_global
36}
37; CHECK: define ptr @use_comdat()
38