Make LLVMIsAtomicSingleThread and LLVMGetAtomicSyncScopeID work on no…

…n-atomic instructions.
llvm · Aug 19, 2024 · 88b495d · 88b495d
1 parent 0028d86
commit 88b495d
Showing 1 changed file with 5 additions and 3 deletions.
diff --git a/llvm/lib/IR/Core.cpp b/llvm/lib/IR/Core.cpp
@@ -4369,12 +4369,14 @@ int LLVMGetMaskValue(LLVMValueRef SVInst, unsigned Elt) {
 int LLVMGetUndefMaskElem(void) { return PoisonMaskElem; }
 
 LLVMBool LLVMIsAtomicSingleThread(LLVMValueRef AtomicInst) {
-  return getAtomicSyncScopeID(unwrap<Instruction>(AtomicInst)).value() ==
-         SyncScope::SingleThread;
+  Instruction *I = unwrap<Instruction>(AtomicInst);
+  if (!I->isAtomic())
+    return 0;
+  return getAtomicSyncScopeID(I).value() == SyncScope::SingleThread;
 }
 
 unsigned LLVMGetAtomicSyncScopeID(LLVMValueRef AtomicInst) {
-  return getAtomicSyncScopeID(unwrap<Instruction>(AtomicInst)).value();
+  return getAtomicSyncScopeID(unwrap<Instruction>(AtomicInst)).value_or(-1);
 }
 
 void LLVMSetAtomicSingleThread(LLVMValueRef AtomicInst, LLVMBool NewValue) {