[llvm] [Spirv][HLSL] Add OpAll lowering and float vec support (PR #87952)

[Vyacheslav Levytskyy via llvm-commits]

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@@ -1391,9 +1452,35 @@ bool SPIRVInstructionSelector::selectFCmp(Register ResVReg,
 
 Register SPIRVInstructionSelector::buildZerosVal(const SPIRVType *ResType,
                                                  MachineInstr &I) const {
+  // OpenCL uses nulls for Zero. In HLSL we don't use null constants.
+  bool ZeroAsNull = STI.isOpenCLEnv();
+  if (ResType->getOpcode() == SPIRV::OpTypeVector)
+    return GR.getOrCreateConstVector(0UL, I, ResType, TII, ZeroAsNull);
+  return GR.getOrCreateConstInt(0, I, ResType, TII, ZeroAsNull);
+}
+
+APFloat getZeroFP(const Type *LLVMFloatTy) {
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VyacheslavLevytskyy wrote:

I mean just a free standing static fun, like isGenericCastablePtr or isUSMStorageClass

https://github.com/llvm/llvm-project/pull/87952