Constant *CtorData = nullptr;
Constant *DtorData = nullptr;
if (TargetTriple.supportsCOMDAT()) {
- // Use COMDAT to deduplicate constructor/destructor function.
+ // Use COMDAT to deduplicate constructor/destructor function. The COMDAT
+ // key needs to be a non-local linkage.
Ctor->setComdat(Mod.getOrInsertComdat(Ctor->getName()));
Dtor->setComdat(Mod.getOrInsertComdat(Dtor->getName()));
+ Ctor->setLinkage(GlobalValue::ExternalLinkage);
+ Dtor->setLinkage(GlobalValue::ExternalLinkage);
CtorData = Ctor;
DtorData = Dtor;
}
--- /dev/null
+; RUN: opt < %s -passes='module(sanmd-module)' -sanitizer-metadata-atomics -S | FileCheck %s
+
+; CHECK: $__sanitizer_metadata_atomics.module_ctor = comdat any
+; CHECK: $__sanitizer_metadata_atomics.module_dtor = comdat any
+; CHECK: $__sanitizer_metadata_covered.module_ctor = comdat any
+; CHECK: $__sanitizer_metadata_covered.module_dtor = comdat any
+
+; CHECK: @llvm.used = appending global [4 x ptr] [ptr @__sanitizer_metadata_atomics.module_ctor, ptr @__sanitizer_metadata_atomics.module_dtor, ptr @__sanitizer_metadata_covered.module_ctor, ptr @__sanitizer_metadata_covered.module_dtor], section "llvm.metadata"
+; CHECK: @llvm.global_ctors = appending global [2 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_atomics.module_ctor, ptr @__sanitizer_metadata_atomics.module_ctor }, { i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_covered.module_ctor, ptr @__sanitizer_metadata_covered.module_ctor }]
+; CHECK: @llvm.global_dtors = appending global [2 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_atomics.module_dtor, ptr @__sanitizer_metadata_atomics.module_dtor }, { i32, ptr, ptr } { i32 2, ptr @__sanitizer_metadata_covered.module_dtor, ptr @__sanitizer_metadata_covered.module_dtor }]
+
+; CHECK: define dso_local void @__sanitizer_metadata_covered.module_ctor() #1 comdat {
+; CHECK: define dso_local void @__sanitizer_metadata_covered.module_dtor() #1 comdat {
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define i8 @foo(ptr %a) nounwind uwtable {
+entry:
+ %0 = load atomic i8, ptr %a unordered, align 1
+ ret i8 %0
+}