derek.holloway
7502bf64a4
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42 lines
1.2 KiB
LLVM
42 lines
1.2 KiB
LLVM
; REQUIRES: x86
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;; Test linking of weak symbols with LTO. The weak symbol may be defined
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;; by another object file, or may be left undefined. When compiling the
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;; IR with an undefined weak symbol, the emitted object file will contain
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;; a weak alias pointing at an absolute symbol for the address null.
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;; Make sure both cases can be linked correctly.
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; RUN: split-file %s %t.dir
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; RUN: llvm-as %t.dir/main.ll -o %t.main.obj
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; RUN: llvm-as %t.dir/optional.ll -o %t.optional.obj
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; RUN: lld-link /entry:main %t.main.obj /out:%t-undef.exe
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; RUN: lld-link /entry:main %t.main.obj %t.optional.obj /out:%t-def.exe
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;--- main.ll
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target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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define dso_local i32 @main() {
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entry:
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%cmp = icmp ne ptr @optionalFunc, null
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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tail call void @optionalFunc()
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br label %if.end
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if.end:
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ret i32 0
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}
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declare extern_weak void @optionalFunc()
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;--- optional.ll
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target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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define void @optionalFunc() {
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ret void
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}
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