Address code review comments

Author: AmrDeveloper

clang/include/clang/CIR/Dialect/IR/CIROps.td

@@ -3261,7 +3261,8 @@ def CIR_ComplexRealOp : CIR_Op<"complex.real", [Pure]> {
   let summary = "Extract the real part of a complex value";
   let description = [{
     `cir.complex.real` operation takes an operand of `!cir.complex`, `!cir.int`
-    or `!cir.float` type and yields the real part of it.
+    or `!cir.float`. If the operand is `!cir.complex`, the real part of it will
+    be returned, otherwise the value returned unmodified. 
 
     Example:
 

clang/test/CIR/CodeGen/complex.cpp

@@ -1140,7 +1140,7 @@ void real_on_scalar_glvalue() {
 // CIR: %[[A_ADDR:.*]] = cir.alloca !cir.float, !cir.ptr<!cir.float>, ["a"]
 // CIR: %[[B_ADDR:.*]] = cir.alloca !cir.float, !cir.ptr<!cir.float>, ["b", init]
 // CIR: %[[TMP_A:.*]] = cir.load{{.*}} %[[A_ADDR]] : !cir.ptr<!cir.float>, !cir.float
-// CIR: %[[A_REAL:.*]] = cir.complex.real %2 : !cir.float -> !cir.float
+// CIR: %[[A_REAL:.*]] = cir.complex.real %[[TMP_A]] : !cir.float -> !cir.float
 // CIR: cir.store{{.*}} %[[A_REAL]], %[[B_ADDR]] : !cir.float, !cir.ptr<!cir.float>
 
 // LLVM: %[[A_ADDR:.*]] = alloca float, i64 1, align 4