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[msan] Change linkage type of __msan_track_origins.
LinkOnceODRLinkage globals may be removed in GlobalOpt if not used in the current module. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169377 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -244,7 +244,7 @@ bool MemorySanitizer::doInitialization(Module &M) {
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appendToGlobalCtors(M, cast<Function>(M.getOrInsertFunction(
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"__msan_init", IRB.getVoidTy(), NULL)), 0);
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new GlobalVariable(M, IRB.getInt32Ty(), true, GlobalValue::LinkOnceODRLinkage,
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new GlobalVariable(M, IRB.getInt32Ty(), true, GlobalValue::WeakODRLinkage,
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IRB.getInt32(ClTrackOrigins), "__msan_track_origins");
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// Create the callback.
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@ -4,6 +4,9 @@ target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f3
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; Check the presence of __msan_init
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; CHECK: @llvm.global_ctors {{.*}} @__msan_init
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; Check the presence and the linkage type of __msan_track_origins
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; CHECK: @__msan_track_origins = weak_odr constant i32 0
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; load followed by cmp: check that we load the shadow and call __msan_warning.
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define void @LoadAndCmp(i32* nocapture %a) nounwind uwtable {
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entry:
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