[APInt] No need for a copy when taking min/max of an APInt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@260827 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/ADT/APInt.h

@@ -1744,16 +1744,24 @@ inline raw_ostream &operator<<(raw_ostream &OS, const APInt &I) {
 namespace APIntOps {
 
 /// \brief Determine the smaller of two APInts considered to be signed.
-inline APInt smin(const APInt &A, const APInt &B) { return A.slt(B) ? A : B; }
+inline const APInt &smin(const APInt &A, const APInt &B) {
+  return A.slt(B) ? A : B;
+}
 
 /// \brief Determine the larger of two APInts considered to be signed.
-inline APInt smax(const APInt &A, const APInt &B) { return A.sgt(B) ? A : B; }
+inline const APInt &smax(const APInt &A, const APInt &B) {
+  return A.sgt(B) ? A : B;
+}
 
 /// \brief Determine the smaller of two APInts considered to be signed.
-inline APInt umin(const APInt &A, const APInt &B) { return A.ult(B) ? A : B; }
+inline const APInt &umin(const APInt &A, const APInt &B) {
+  return A.ult(B) ? A : B;
+}
 
 /// \brief Determine the larger of two APInts considered to be unsigned.
-inline APInt umax(const APInt &A, const APInt &B) { return A.ugt(B) ? A : B; }
+inline const APInt &umax(const APInt &A, const APInt &B) {
+  return A.ugt(B) ? A : B;
+}
 
 /// \brief Check if the specified APInt has a N-bits unsigned integer value.
 inline bool isIntN(unsigned N, const APInt &APIVal) { return APIVal.isIntN(N); }