[clang] [clang] [Sema] Check argument range for prefetchi* intrinsics (PR #149745)

[Phoebe Wang via cfe-commits]

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@@ -14,3 +14,7 @@ void test_m_prefetch_it1(void *p) {
   // CHECK-LABEL: define{{.*}} void @test_m_prefetch_it1
   // CHECK: call void @llvm.prefetch.p0(ptr {{.*}}, i32 0, i32 2, i32 0)
 }
+
+void test_invalid_prefetchi(void* p) {
+  return __builtin_ia32_prefetchi(p, 1); // expected-error {{argument value 1 is outside the valid range [2, 3]}}
+}
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phoebewang wrote:

The test needs to be in a seperate file.

https://github.com/llvm/llvm-project/pull/149745