41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
|
; REQUIRES: x86
|
||
|
|
|
||
|
|
;; Test linking of weak symbols with LTO. The weak symbol may be defined
|
||
|
|
;; by another object file, or may be left undefined. When compiling the
|
||
|
|
;; IR with an undefined weak symbol, the emitted object file will contain
|
||
|
|
;; a weak alias pointing at an absolute symbol for the address null.
|
||
|
|
;; Make sure both cases can be linked correctly.
|
||
|
|
|
||
|
|
; RUN: split-file %s %t.dir
|
||
|
|
; RUN: llvm-as %t.dir/main.ll -o %t.main.obj
|
||
|
|
; RUN: llvm-as %t.dir/optional.ll -o %t.optional.obj
|
||
|
|
|
||
|
|
; RUN: lld-link /entry:main %t.main.obj /out:%t-undef.exe
|
||
|
|
; RUN: lld-link /entry:main %t.main.obj %t.optional.obj /out:%t-def.exe
|
||
|
|
|
||
|
|
;--- main.ll
|
||
|
|
target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-pc-windows-msvc"
|
||
|
|
|
||
|
|
define dso_local i32 @main() {
|
||
|
|
entry:
|
||
|
|
br i1 icmp ne (ptr @optionalFunc, ptr null), label %if.then, label %if.end
|
||
|
|
|
||
|
|
if.then:
|
||
|
|
tail call void @optionalFunc()
|
||
|
|
br label %if.end
|
||
|
|
|
||
|
|
if.end:
|
||
|
|
ret i32 0
|
||
|
|
}
|
||
|
|
|
||
|
|
declare extern_weak void @optionalFunc()
|
||
|
|
|
||
|
|
;--- optional.ll
|
||
|
|
target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-pc-windows-msvc"
|
||
|
|
|
||
|
|
define void @optionalFunc() {
|
||
|
|
ret void
|
||
|
|
}
|