[InstCombine] Use setAllBits in place of getAllOnesValue since we know the bitwidths are the same. NFCI

llvm-svn: 299413

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
index b126992103e..8eca22ae284 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
@@ -235,7 +235,7 @@ Value *InstCombiner::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
   // operands.  This allows visitTruncInst (for example) to simplify the
   // operand of a trunc without duplicating all the logic below.
   if (Depth == 0 && !V->hasOneUse())
-    DemandedMask = APInt::getAllOnesValue(BitWidth);
+    DemandedMask.setAllBits();
 
   switch (I->getOpcode()) {
   default: