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; 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:
%cmp = icmp ne ptr @optionalFunc, null
br i1 %cmp, 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
}
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