Test that the C++20 init statement works with range Cilk for

clang/test/Cilk/cilkfor-init.cpp

@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 %s -std=c++20 -triple x86_64-unknown-linux-gnu -fopencilk -disable-llvm-passes -verify -emit-llvm -o - | FileCheck %s
+// Make sure the C++20 init-statement works with cilk_for.
+
+extern bool *getarray(unsigned long size);
+
+extern unsigned int global[1000];
+
+// CHECK-LABEL: _Z4scanv
+void scan() {
+
+  // This syntax is new in C++20.
+  _Cilk_for (bool *array = getarray(666); unsigned int i : global) {
+    // expected-warning@-1{{experimental}}
+    // CHECK: %[[ARRAY:.+]] = call noundef ptr @_Z8getarraym(i64 noundef 666)
+    // CHECK-NEXT: store ptr %[[ARRAY]], ptr %array, align 8
+    // CHECK: pfor.body:
+    // CHECK: %[[ARRAY2:.+]] = load ptr, ptr %array
+    // CHECK: %[[ELEMENT:.+]] = getelementptr inbounds i8, ptr %[[ARRAY2]]
+    // CHECK: store i8 1, ptr %[[ELEMENT]]
+    // CHECK-NEXT: br label
+    array[i] = true;
+  }
+
+  // CHECK: ret void
+
+}