commit 24db6b800fcdf0b45f1e2489ec3a7fb57937f0d1
author Craig Topper <craig.topper@gmail.com> Fri Apr 28 16:58:05 2017 +0000
committer Craig Topper <craig.topper@gmail.com> Fri Apr 28 16:58:05 2017 +0000
tree 9bb13c2474c0f2d0e37ee8db12b9c27b7ebc4fa2
parent 96d6ee857653f7b155fa96e5200de3a527ec31c2

[APInt] Add clearSignBit method. Use it and setSignBit in a few places. NFCI

llvm-svn: 301656

llvm/lib/Analysis/DemandedBits.cpp

diff --git a/llvm/lib/Analysis/DemandedBits.cpp b/llvm/lib/Analysis/DemandedBits.cpp
index 285339d..9f5dc53 100644
--- a/llvm/lib/Analysis/DemandedBits.cpp
+++ b/llvm/lib/Analysis/DemandedBits.cpp
@@ -181,7 +181,7 @@
         // bits, then we must keep the highest input bit.
         if ((AOut & APInt::getHighBitsSet(BitWidth, ShiftAmt))
             .getBoolValue())
-          AB.setBit(BitWidth-1);
+          AB.setSignBit();
 
         // If the shift is exact, then the low bits are not dead
         // (they must be zero).
@@ -239,7 +239,7 @@
     if ((AOut & APInt::getHighBitsSet(AOut.getBitWidth(),
                                       AOut.getBitWidth() - BitWidth))
         .getBoolValue())
-      AB.setBit(BitWidth-1);
+      AB.setSignBit();
     break;
   case Instruction::Select:
     if (OperandNo != 0)