llvm-reduce: Fix invalid reduction on tokens in operands-to-args (#133855)

Author: arsenm

llvm/test/tools/llvm-reduce/reduce-operands-to-args-token.ll

@@ -0,0 +1,27 @@
+; Check no invalid reduction caused by introducing a token typed
+; function argument
+
+; RUN: llvm-reduce --abort-on-invalid-reduction --delta-passes=operands-to-args --test FileCheck --test-arg --check-prefix=INTERESTING --test-arg %s --test-arg --input-file %s -o %t
+; RUN: FileCheck -check-prefix=RESULT %s < %t
+
+; INTERESTING-LABEL: define void @tokens(
+; INTERESTING: call void @llvm.token.consumer
+
+; RESULT-LABEL: define void @tokens(ptr %local.ptr) {
+; RESULT-NEXT: %local.ptr1 = alloca i32, align 4
+; RESULT-NEXT: %token = call token @llvm.token.producer()
+; RESULT-NEXT: store i32 0, ptr %local.ptr, align 4
+; RESULT-NEXT: call void @llvm.token.consumer(token %token)
+; RESULT-NEXT: store i32 1, ptr %local.ptr, align 4
+; RESULT-NEXT: ret void
+define void @tokens() {
+  %local.ptr = alloca i32
+  %token = call token @llvm.token.producer()
+  store i32 0, ptr %local.ptr
+  call void @llvm.token.consumer(token %token)
+  store i32 1, ptr %local.ptr
+  ret void
+}
+
+declare token @llvm.token.producer()
+declare void @llvm.token.consumer(token)

llvm/tools/llvm-reduce/deltas/ReduceOperandsToArgs.cpp

@@ -36,7 +36,7 @@ static bool canReduceUse(Use &Op) {
     return false;
 
   // Don't pass labels/metadata as arguments.
-  if (Ty->isLabelTy() || Ty->isMetadataTy())
+  if (Ty->isLabelTy() || Ty->isMetadataTy() || Ty->isTokenTy())
     return false;
 
   // No need to replace values that are already arguments.