[CodeGen] Construct SmallVector with ArrayRef (NFC)

[kazutakahirata]

Note that we can drop the call to reserve because the constructor that
takes ArrayRef calls append, which in turn calls reserve.

[llvmbot]

@llvm/pr-subscribers-llvm-selectiondag

Author: Kazu Hirata (kazutakahirata)

Changes

Note that we can drop the call to reserve because the constructor that
takes ArrayRef calls append, which in turn calls reserve.

---

Full diff: https://github.com/llvm/llvm-project/pull/135930.diff

1 Files Affected:

• (modified) llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp (+1-3)

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index d72be359867ca..8322d243b5bc3 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -24741,10 +24741,8 @@ static SDValue combineConcatVectorOfShuffleAndItsOperands(
 
   // We are going to pad the shuffle operands, so any indice, that was picking
   // from the second operand, must be adjusted.
-  SmallVector<int, 16> AdjustedMask;
-  AdjustedMask.reserve(SVN->getMask().size());
+  SmallVector<int, 16> AdjustedMask(SVN->getMask());
   assert(SVN->getOperand(1).isUndef() && "Expected unary shuffle!");
-  append_range(AdjustedMask, SVN->getMask());
 
   // Identity masks for the operands of the (padded) shuffle.
   SmallVector<int, 32> IdentityMask(2 * OpVT.getVectorNumElements());

[RKSimon]

LGTM (I'm assuming the CI break is unrelated)