[clang] [llvm] [PowerPC] Add Support for BCDSHIFT, BCDSHIFTR, BCDTRUNC, BCDUTRUNC, and BCDUSHIFT instruction support (PR #154715)

[Lei Huang via cfe-commits]

================
@@ -114,6 +114,36 @@ bool SemaPPC::CheckPPCBuiltinFunctionCall(const TargetInfo &TI,
     return Diag(TheCall->getBeginLoc(), diag::err_64_bit_builtin_32_bit_tgt)
            << TheCall->getSourceRange();
 
+  // Common BCD type-validation helpers
+  // Emit error diagnostics and return true on success
+  //  - IsVectorType: enforces vector unsigned char
+  //  - IsIntType: enforces any integer type
+  // Lambdas centralize type checks for BCD builtin handlers
+
+  // Lambda 1: verify vector unsigned char type
+  auto IsVectorType = [&](QualType ArgTy, unsigned ArgIndex) -> bool {
----------------
lei137 wrote:

nit: lambda name should be more specific to your check.  eg `IsTypeVecUChar()`

https://github.com/llvm/llvm-project/pull/154715