[clang] [llvm] [PowerPC][X86] Make cpu id builtins target independent and lower for PPC (PR #68919)

[Nemanja Ivanovic via cfe-commits]

================
@@ -2110,6 +2110,66 @@ static bool checkFPMathBuiltinElementType(Sema &S, SourceLocation Loc,
   return false;
 }
 
+/// SemaBuiltinCpuSupports - Handle __builtin_cpu_supports(char *).
+/// This checks that the target supports __builtin_cpu_supports and
+/// that the string argument is constant and valid.
+static bool SemaBuiltinCpuSupports(Sema &S, const TargetInfo &TI,
+                                   const TargetInfo *AuxTI, CallExpr *TheCall) {
+  Expr *Arg = TheCall->getArg(0);
+
+  const TargetInfo *TheTI = nullptr;
+  if (TI.supportsCpuSupports())
+    TheTI = &TI;
+  else if (AuxTI && AuxTI->supportsCpuSupports())
+    TheTI = AuxTI;
----------------
nemanjai wrote:

It does not appear that this is needed for the auxiliary target. I have removed that now.

https://github.com/llvm/llvm-project/pull/68919