[clang] [Clang][CodeGen] Avoid emitting poison immargs for __builtin_prefetch (PR #201623)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions c,cpp -- clang/test/CodeGen/prefetch-poison-arg.c clang/lib/CodeGen/CGBuiltin.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index e3aa7888a..f5d9211d1 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -4307,10 +4307,11 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
     Value *Locality, *RW, *Address = EmitScalarExpr(E->getArg(0));
     unsigned ICEArguments = (1 << 1) | (1 << 2);
     // FIXME: Technically these constants should of type 'int', yes?
-    RW = (E->getNumArgs() > 1) ? EmitScalarOrConstFoldImmArg(ICEArguments, 1, E) :
-      llvm::ConstantInt::get(Int32Ty, 0);
-    Locality = (E->getNumArgs() > 2) ? EmitScalarOrConstFoldImmArg(ICEArguments, 2, E) :
-      llvm::ConstantInt::get(Int32Ty, 3);
+    RW = (E->getNumArgs() > 1) ? EmitScalarOrConstFoldImmArg(ICEArguments, 1, E)
+                               : llvm::ConstantInt::get(Int32Ty, 0);
+    Locality = (E->getNumArgs() > 2)
+                   ? EmitScalarOrConstFoldImmArg(ICEArguments, 2, E)
+                   : llvm::ConstantInt::get(Int32Ty, 3);
     Value *Data = llvm::ConstantInt::get(Int32Ty, 1);
     Function *F = CGM.getIntrinsic(Intrinsic::prefetch, Address->getType());
     Builder.CreateCall(F, {Address, RW, Locality, Data});

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https://github.com/llvm/llvm-project/pull/201623