[clang] [CIR] Add math and builtin intrinsics support (PR #175233)

[Hendrik Hübner via cfe-commits]

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@@ -799,6 +904,11 @@ RValue CIRGenFunction::emitBuiltinExpr(const GlobalDecl &gd, unsigned builtinID,
   case Builtin::BI__builtin_popcountg:
     return emitBuiltinBitOp<cir::BitPopcountOp>(*this, e);
 
+  case Builtin::BI__builtin_unpredictable: {
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HendrikHuebner wrote:

This should be a separate PR

https://github.com/llvm/llvm-project/pull/175233