[clang] [llvm] [HLSL] Implement ddx/ddy_coarse intrinsics (PR #164831)

[Farzon Lotfi via cfe-commits]

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@@ -12,3 +12,5 @@ include "clang/Basic/BuiltinsSPIRVBase.td"
 def reflect : SPIRVBuiltin<"void(...)", [NoThrow, Const]>;
 def faceforward : SPIRVBuiltin<"void(...)", [NoThrow, Const, CustomTypeChecking]>;
 def refract : SPIRVBuiltin<"void(...)", [NoThrow, Const, CustomTypeChecking]>;
+def ddx_coarse : SPIRVBuiltin<"void(...)", [NoThrow, Const, CustomTypeChecking]>;
+def ddy_coarse : SPIRVBuiltin<"void(...)", [NoThrow, Const, CustomTypeChecking]>;
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farzonl wrote:

revert

https://github.com/llvm/llvm-project/pull/164831