1; Test to ensure that we import a single copy of a global variable. This is
2; important when we link in an object file twice, which is normally works when
3; all symbols have either weak or internal linkage. If we import an internal
4; global variable twice it will get promoted in each module, and given the same
5; name as the IR hash will be identical, resulting in multiple defs when linking.
6; RUN: opt -module-summary %s -o %t1.bc
7; RUN: opt -module-summary %p/Inputs/globals-import.ll -o %t2.bc
8; RUN: opt -module-summary %p/Inputs/globals-import.ll -o %t2b.bc
9; RUN: llvm-lto -thinlto-action=thinlink %t1.bc %t2.bc %t2b.bc -o %t3.index.bc
10
11; RUN: llvm-lto -thinlto-action=import %t1.bc -thinlto-index=%t3.index.bc
12; RUN: llvm-dis %t1.bc.thinlto.imported.bc -o - | FileCheck --check-prefix=IMPORT %s
13; RUN: llvm-lto -thinlto-action=promote %t2.bc -thinlto-index=%t3.index.bc
14; RUN: llvm-lto -thinlto-action=promote %t2b.bc -thinlto-index=%t3.index.bc
15; RUN: llvm-dis %t2.bc.thinlto.promoted.bc -o - | FileCheck --check-prefix=PROMOTE1 %s
16; RUN: llvm-dis %t2b.bc.thinlto.promoted.bc -o - | FileCheck --check-prefix=PROMOTE2 %s
17
18; IMPORT: @baz.llvm.0 = available_externally hidden constant i32 10, align 4
19
20; PROMOTE1: @baz.llvm.0 = hidden constant i32 10, align 4
21; PROMOTE1: define weak_odr i32 @foo() {
22
23; Second copy of IR object should not have any symbols imported/promoted.
24; PROMOTE2: @baz = internal constant i32 10, align 4
25; PROMOTE2: define available_externally i32 @foo() {
26
27target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
28target triple = "x86_64-pc-linux-gnu"
29
30declare i32 @foo()
31
32define i32 @main() local_unnamed_addr {
33  %1 = call i32 @foo()
34  ret i32 %1
35}
36