1; RUN: opt -module-summary %s -o %t.o
2; RUN: opt -module-summary %p/Inputs/thinlto_weak_resolution.ll -o %t2.o
3
4; Verify that prevailing weak for linker symbol is kept.
5; Note that gold picks the first copy of a function as the prevailing one,
6; so listing %t.o first is sufficient to ensure that its copies are prevailing.
7; RUN: %gold -m elf_x86_64 -plugin %llvmshlibdir/LLVMgold.so \
8; RUN:     --plugin-opt=thinlto \
9; RUN:     --plugin-opt=save-temps \
10; RUN:     -shared \
11; RUN:     -o %t3.o %t.o %t2.o
12
13; RUN: llvm-nm %t3.o | FileCheck %s
14; CHECK: weakfunc
15
16; Most of the preempted functions should have been eliminated (the plugin will
17; set linkage of odr functions to available_externally and linkonce functions
18; are removed by globaldce). FIXME: Need to introduce combined index linkage
19; that means "drop this function" so we can avoid importing linkonce functions
20; and drop weak functions.
21; RUN: llvm-dis %t2.o.4.opt.bc -o - | FileCheck --check-prefix=OPT2 %s
22; OPT2-NOT: @
23; OPT2: @weakfunc
24; OPT2-NOT: @
25
26; RUN: llvm-dis %t.o.3.import.bc -o - | FileCheck --check-prefix=IMPORT %s
27; RUN llvm-dis %t2.o.3.import.bc -o - | FileCheck --check-prefix=IMPORT2 %s
28
29target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
30target triple = "x86_64-unknown-linux-gnu"
31
32
33define i32 @main() #0 {
34entry:
35  call void @linkonceodralias()
36  call void @linkoncealias()
37  call void @linkonceodrfuncwithalias()
38  call void @linkoncefuncwithalias()
39  call void @linkonceodrfunc()
40  call void @linkoncefunc()
41  call void @weakodrfunc()
42  call void @weakfunc()
43  call void @linkonceodrfuncInSingleModule()
44  ret i32 0
45}
46
47; Alias are resolved to weak_odr in prevailing module, but left as linkonce_odr
48; in non-prevailing module (illegal to have an available_externally alias).
49; IMPORT: @linkonceodralias = weak_odr alias void (), void ()* @linkonceodrfuncwithalias
50; IMPORT2: @linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
51@linkonceodralias = linkonce_odr alias void (), void ()* @linkonceodrfuncwithalias
52
53; Alias are resolved in prevailing module, but not optimized in
54; non-prevailing module (illegal to have an available_externally alias).
55; IMPORT: @linkoncealias = weak alias void (), void ()* @linkoncefuncwithalias
56; IMPORT2: @linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
57@linkoncealias = linkonce alias void (), void ()* @linkoncefuncwithalias
58
59; Function with an alias are resolved in prevailing module, but
60; not optimized in non-prevailing module (illegal to have an
61; available_externally aliasee).
62; IMPORT: define weak_odr void @linkonceodrfuncwithalias()
63; IMPORT2: define linkonce_odr void @linkonceodrfuncwithalias()
64define linkonce_odr void @linkonceodrfuncwithalias() #0 {
65entry:
66  ret void
67}
68
69; Function with an alias are resolved to weak in prevailing module, but
70; not optimized in non-prevailing module (illegal to have an
71; available_externally aliasee).
72; IMPORT: define weak void @linkoncefuncwithalias()
73; IMPORT2: define linkonce void @linkoncefuncwithalias()
74define linkonce void @linkoncefuncwithalias() #0 {
75entry:
76  ret void
77}
78
79; IMPORT: define weak_odr void @linkonceodrfunc()
80; IMPORT2: define available_externally void @linkonceodrfunc()
81define linkonce_odr void @linkonceodrfunc() #0 {
82entry:
83  ret void
84}
85; IMPORT: define weak void @linkoncefunc()
86; IMPORT2: define linkonce void @linkoncefunc()
87define linkonce void @linkoncefunc() #0 {
88entry:
89  ret void
90}
91; IMPORT: define weak_odr void @weakodrfunc()
92; IMPORT2: define available_externally void @weakodrfunc()
93define weak_odr void @weakodrfunc() #0 {
94entry:
95  ret void
96}
97; IMPORT: define weak void @weakfunc()
98; IMPORT2: define weak void @weakfunc()
99define weak void @weakfunc() #0 {
100entry:
101  ret void
102}
103
104; IMPORT: weak_odr void @linkonceodrfuncInSingleModule()
105define linkonce_odr void @linkonceodrfuncInSingleModule() #0 {
106entry:
107  ret void
108}
109