================
@@ -0,0 +1,39 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
+
+constexpr int increment(int& x) {
+ x++;
+ return x;
+}
+
+constexpr int test_clzg_0() {
+ int x = 0;
+ [[maybe_unused]] int unused = __builtin_clzg(0U, increment(x));
+ return x;
+}
+
+static_assert(test_clzg_0() == 1);
+
+constexpr int test_clzg_1() {
+ int x = 0;
+ [[maybe_unused]] int unused = __builtin_clzg(1U, increment(x));
+ return x;
+}
+
+static_assert(test_clzg_1() == 1);
+
+constexpr int test_ctzg_0() {
+ int x = 0;
+ [[maybe_unused]] int unused = __builtin_ctzg(0U, increment(x));
+ return x;
+}
+
+static_assert(test_ctzg_0() == 1);
+
+constexpr int test_ctzg_1() {
+ int x = 0;
+ [[maybe_unused]] int unused = __builtin_ctzg(1U, increment(x));
----------------
overmighty wrote:
I guess using a C-style cast is fine if it's to cast to `void`.
Adding `-Wno-unused-value` sounds a bit excessive however.
https://github.com/llvm/llvm-project/pull/86742
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