[clang] [llvm] [HLSL][SPIRV]Add SPIRV generation for HLSL dot (PR #104656)

[Greg Roth via cfe-commits]

================
@@ -2157,6 +2221,16 @@ bool SPIRVInstructionSelector::selectIntrinsic(Register 
ResVReg,
     break;
   case Intrinsic::spv_thread_id:
     return selectSpvThreadId(ResVReg, ResType, I);
+  case Intrinsic::spv_fdot:
+    return BuildMI(BB, I, I.getDebugLoc(), TII.get(SPIRV::OpDot))
----------------
pow2clk wrote:

I don't mind creating a float function to expand the fdot. I don't think you're 
suggesting that I have one call for float and integer as that's the opposite of 
what you suggested 
[here](https://github.com/llvm/llvm-project/pull/102872#discussion_r1714053193).
 Are the checks you're referring to the asserts? 

https://github.com/llvm/llvm-project/pull/104656
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