1; REQUIRES: x86 2 3;; Test linking of weak symbols with LTO. The weak symbol may be defined 4;; by another object file, or may be left undefined. When compiling the 5;; IR with an undefined weak symbol, the emitted object file will contain 6;; a weak alias pointing at an absolute symbol for the address null. 7;; Make sure both cases can be linked correctly. 8 9; RUN: split-file %s %t.dir 10; RUN: llvm-as %t.dir/main.ll -o %t.main.obj 11; RUN: llvm-as %t.dir/optional.ll -o %t.optional.obj 12 13; RUN: lld-link /entry:main %t.main.obj /out:%t-undef.exe 14; RUN: lld-link /entry:main %t.main.obj %t.optional.obj /out:%t-def.exe 15 16;--- main.ll 17target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 18target triple = "x86_64-pc-windows-msvc" 19 20define dso_local i32 @main() { 21entry: 22 %cmp = icmp ne ptr @optionalFunc, null 23 br i1 %cmp, label %if.then, label %if.end 24 25if.then: 26 tail call void @optionalFunc() 27 br label %if.end 28 29if.end: 30 ret i32 0 31} 32 33declare extern_weak void @optionalFunc() 34 35;--- optional.ll 36target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 37target triple = "x86_64-pc-windows-msvc" 38 39define void @optionalFunc() { 40 ret void 41} 42