[clang] [clang][Interp] Implement builintin_expect (PR #69713)

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``````````bash
git-clang-format --diff ba8565fbcb975e2d067ce3ae5a7dbaae4953edd3 12cb6e61a8e77a7800fda0ae4dd1148e76844da8 -- clang/lib/AST/Interp/InterpBuiltin.cpp clang/test/AST/Interp/builtin-functions.cpp clang/test/Sema/builtin-expect-with-probability.cpp
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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/AST/Interp/InterpBuiltin.cpp b/clang/lib/AST/Interp/InterpBuiltin.cpp
index d5b694a97ca1..fb6c1dc7a257 100644
--- a/clang/lib/AST/Interp/InterpBuiltin.cpp
+++ b/clang/lib/AST/Interp/InterpBuiltin.cpp
@@ -450,8 +450,7 @@ static bool interp__builtin_popcount(InterpState &S, CodePtr OpPC,
 // __builtin_expect_with_probability(long, long, double)
 static bool interp__builtin_expect(InterpState &S, CodePtr OpPC,
                                    const InterpFrame *Frame,
-                                   const Function *Func,
-                                   const CallExpr *Call) {
+                                   const Function *Func, const CallExpr *Call) {
   // The return value is simply the value of the first parameter.
   // We ignore the probability.
   unsigned NumArgs = Call->getNumArgs();
@@ -459,9 +458,9 @@ static bool interp__builtin_expect(InterpState &S, CodePtr OpPC,
 
   assert(NumArgs == 2 || NumArgs == 3);
 
-  // The top of the stack is the probability (either as a long for builtin_expect()
-  // or as a float for builtin_expect_with_probability()), which we want to ignore
-  // entirely.
+  // The top of the stack is the probability (either as a long for
+  // builtin_expect() or as a float for builtin_expect_with_probability()),
+  // which we want to ignore entirely.
   size_t LongSize = align(primSize(getLongPrimType(S))) * 2;
   unsigned Offset = LongSize;
   if (NumArgs == 3)

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https://github.com/llvm/llvm-project/pull/69713