[llvm] [SPIR-V] Implement sample and sample_clamp intrinsics for HLSL resources (PR #177234)

[Nathan Gauër via llvm-commits]

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@@ -3019,6 +3023,45 @@ Register SPIRVInstructionSelector::buildZerosVal(const SPIRVType *ResType,
   return GR.getOrCreateConstInt(0, I, ResType, TII, ZeroAsNull);
 }
 
+bool SPIRVInstructionSelector::isConstantZero(Register Reg) const {
+  auto IsZero = [this](Register Reg) {
+    Register R = Reg;
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Keenuts wrote:

Why this locale?

https://github.com/llvm/llvm-project/pull/177234