Duncan points out that the subtraction is unneeded since hte code

knows the vector is not pow2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44740 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/LegalizeTypesSplit.cpp b/lib/CodeGen/SelectionDAG/LegalizeTypesSplit.cpp
index c77bf12d9a35b5300a93e7458acd2d69804cc15e..685ae9e76b8f4052b82816315faabcca9403bd24 100644 (file)
--- a/lib/CodeGen/SelectionDAG/LegalizeTypesSplit.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeTypesSplit.cpp
@@ -27,7 +27,7 @@ static void GetSplitDestVTs(MVT::ValueType InVT,
     NumElements >>= 1;
     Lo = Hi =  MVT::getVectorType(NewEltVT, NumElements);
   } else {                                     // Non-power-of-two vectors.
-    unsigned NewNumElts_Lo = 1 << Log2_32(NumElements-1);
+    unsigned NewNumElts_Lo = 1 << Log2_32(NumElements);
     unsigned NewNumElts_Hi = NumElements - NewNumElts_Lo;
     Lo = MVT::getVectorType(NewEltVT, NewNumElts_Lo);
     Hi = MVT::getVectorType(NewEltVT, NewNumElts_Hi);