[clang] [llvm] Add normalize builtins and normalize HLSL function to DirectX and SPIR-V backend (PR #102683)

[Farzon Lotfi via cfe-commits]

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@@ -0,0 +1,73 @@
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -fnative-half-type \
+// RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s \ 
+// RUN:   --check-prefixes=CHECK,NATIVE_HALF
+// RUN: %clang_cc1 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.3-library %s -emit-llvm -disable-llvm-passes \
+// RUN:   -o - | FileCheck %s --check-prefixes=CHECK,NO_HALF
+
+// NATIVE_HALF: define noundef half @
+// NATIVE_HALF: call half @llvm.dx.normalize.f16(half
+// NO_HALF: call float @llvm.dx.normalize.f32(float
+// NATIVE_HALF: ret half
+// NO_HALF: ret float
+half test_normalize_half(half p0)
+{
+	return normalize(p0);
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farzonl wrote:

Optional NIT: spacing seems off on this file. Maybe worth running clang format on this file so it looks like other tests in `clang/test/CodeGenHLSL/builtins/`.

https://github.com/llvm/llvm-project/pull/102683