[APInt] Use operator<<= instead of shl where possible. NFC

llvm-svn: 301103

1 files changed, 4 insertions, 3 deletions

diff --git a/llvm/lib/Support/APInt.cpp b/llvm/lib/Support/APInt.cpp
index c72e3bf9872..5f3358d1dcf 100644
--- a/llvm/lib/Support/APInt.cpp
+++ b/llvm/lib/Support/APInt.cpp
@@ -844,7 +844,7 @@ APInt llvm::APIntOps::RoundDoubleToAPInt(double Double, unsigned width) {
 
   // Otherwise, we have to shift the mantissa bits up to the right location
   APInt Tmp(width, mantissa);
-  Tmp = Tmp.shl((unsigned)exp - 52);
+  Tmp <<= (unsigned)exp - 52;
   return isNeg ? -Tmp : Tmp;
 }
 
@@ -1081,9 +1081,10 @@ void APInt::lshrSlowCase(unsigned ShiftAmt) {
 
 /// Left-shift this APInt by shiftAmt.
 /// @brief Left-shift function.
-APInt APInt::shl(const APInt &shiftAmt) const {
+APInt &APInt::operator<<=(const APInt &shiftAmt) {
   // It's undefined behavior in C to shift by BitWidth or greater.
-  return shl((unsigned)shiftAmt.getLimitedValue(BitWidth));
+  *this <<= (unsigned)shiftAmt.getLimitedValue(BitWidth);
+  return *this;
 }
 
 void APInt::shlSlowCase(unsigned ShiftAmt) {