[llvm] [clang] [AIX] support builtin_cpu_is() for aix (PR #80069)

[zhijian lin via cfe-commits]

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@@ -16542,22 +16542,75 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
 
   Intrinsic::ID ID = Intrinsic::not_intrinsic;
 
+#include "llvm/TargetParser/PPCTargetParser.def"
+  auto GetOpRes = [&](Value *FieldValue, unsigned Mask, unsigned Op,
+                      unsigned Op_Value) -> Value * {
+    Value *Value1 = FieldValue;
+    if (Mask)
+      Value1 = Builder.CreateAnd(Value1, Mask);
+    assert((Op == OP_EQ) && "Only support equal comparision");
+    return Builder.CreateICmp(ICmpInst::ICMP_EQ, FieldValue,
+                              ConstantInt::get(Int32Ty, Op_Value));
+  };
+
+  auto ConvBuiltinCpu = [&](unsigned SupportOP, unsigned FieldIdx,
+                            unsigned Op_Mask, unsigned Op,
+                            unsigned Op_Value) -> Value * {
+    if (SupportOP == AIX_BUILTIN_PPC_FALSE)
+      return llvm::ConstantInt::getFalse(ConvertType(E->getType()));
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diggerlin wrote:

I guess you want to let the code more efficiently with pulling out E->getType() ? 
but
1. if I pull out E->getType() , it means that  E->getType() will be run in the all call flow path even `SupportOP == OP_EQ`, which do not need the E->getType(). 
 2. the  `E->getType()` only be called once at maximum at each call flow path.  

https://github.com/llvm/llvm-project/pull/80069