[APInt] Inline the single word case of lshrInPlace similar to what we do for <<=.

llvm-svn: 300577

llvm/include/llvm/ADT/APInt.h

@@ -191,6 +191,9 @@ private:
   /// out-of-line slow case for shl
   void shlSlowCase(unsigned ShiftAmt);
 
+  /// out-of-line slow case for lshr.
+  void lshrSlowCase(unsigned ShiftAmt);
+
   /// out-of-line slow case for operator=
   APInt &AssignSlowCase(const APInt &RHS);
 
@@ -889,7 +892,16 @@ public:
   }
 
   /// Logical right-shift this APInt by ShiftAmt in place.
-  void lshrInPlace(unsigned ShiftAmt);
+  void lshrInPlace(unsigned ShiftAmt) {
+    if (isSingleWord()) {
+      if (ShiftAmt >= BitWidth)
+        VAL = 0;
+      else
+        VAL >>= ShiftAmt;
+      return;
+    }
+    lshrSlowCase(ShiftAmt);
+  }
 
   /// \brief Left-shift function.
   ///

llvm/lib/Support/APInt.cpp

@@ -1140,15 +1140,7 @@ void APInt::lshrInPlace(const APInt &shiftAmt) {
 
 /// Logical right-shift this APInt by shiftAmt.
 /// @brief Logical right-shift function.
-void APInt::lshrInPlace(unsigned ShiftAmt) {
-  if (isSingleWord()) {
-    if (ShiftAmt >= BitWidth)
-      VAL = 0;
-    else
-      VAL >>= ShiftAmt;
-    return;
-  }
-
+void APInt::lshrSlowCase(unsigned ShiftAmt) {
   tcShiftRight(pVal, getNumWords(), ShiftAmt);
 }