[clang] [CIR] Avoid folding non-integer constants as integer casts (PR #214551)

[Kunal Dubey via cfe-commits]

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@@ -0,0 +1,10 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -fclangir -emit-cir -verify %s -o - | FileCheck %s
+
+void test_stdc_trailing_zeros_undef_cast(unsigned long long x) {
+  // expected-error at +1 {{ClangIR code gen Not Yet Implemented: unimplemented builtin call: __builtin_stdc_trailing_zeros}}
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xakep8 wrote:

Good Point I'll move this test to `clang/test/CIR/Transforms/canonicalize.cir` so that I directly test the folding of undef.

https://github.com/llvm/llvm-project/pull/214551