[clang] [llvm] [HLSL] Implement the `degrees` intrinsic (PR #111209)

[Greg Roth via cfe-commits]

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@@ -0,0 +1,54 @@
+; RUN: opt -S -dxil-intrinsic-expansion -scalarizer -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
+
+; Make sure dxil op function calls for degrees are expanded and lowered as fmul for float and half.
+
+define noundef half @degrees_half(half noundef %a) {
+; CHECK-LABEL: define noundef half @degrees_half(
+; CHECK-SAME: half noundef [[A:%.*]]) {
+; CHECK-NEXT:  [[ENTRY:.*:]]
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pow2clk wrote:

I see a similar issue with the existing tests that this may have used as a template, but this check and the corresponding checks below do nothing except accept a line that can really only be `entry:`. It accepts anything ending in `:` and saves it to a variable that is never used. I wonder if perhaps it was the result of an overzealous search and replace at one point. 
```suggestion
; CHECK-NEXT:  entry:
```

https://github.com/llvm/llvm-project/pull/111209