[clang] [CIR] Add X86 prefetch builtins (PR #168051)

[Hendrik Hübner via cfe-commits]

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@@ -158,6 +163,33 @@ computeFullLaneShuffleMask(CIRGenFunction &cgf, const mlir::Value vec,
 
   outIndices.resize(numElts);
 }
+
+static mlir::Value emitPrefetch(CIRGenFunction &cgf, unsigned builtinID,
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HendrikHuebner wrote:

Updated. Can you take another look?

https://github.com/llvm/llvm-project/pull/168051