[DAGCombiner] Use SDValue::getConstantOperandVal helper where possible. NFCI.

llvm-svn: 301300

1 files changed, 5 insertions, 7 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index aeca3c2aa2b..f7a15ba8054 100644
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -5617,8 +5617,7 @@ SDValue DAGCombiner::visitSRL(SDNode *N) {
   if (N1C && N0.getOpcode() == ISD::TRUNCATE &&
       N0.getOperand(0).getOpcode() == ISD::SRL &&
       isa<ConstantSDNode>(N0.getOperand(0)->getOperand(1))) {
-    uint64_t c1 =
-      cast<ConstantSDNode>(N0.getOperand(0)->getOperand(1))->getZExtValue();
+    uint64_t c1 = N0.getOperand(0).getConstantOperandVal(1);
     uint64_t c2 = N1C->getZExtValue();
     EVT InnerShiftVT = N0.getOperand(0).getValueType();
     EVT ShiftCountVT = N0.getOperand(0)->getOperand(1).getValueType();
@@ -11645,7 +11644,7 @@ bool DAGCombiner::SliceUpLoad(SDNode *N) {
     // Check if this is a trunc(lshr).
     if (User->getOpcode() == ISD::SRL && User->hasOneUse() &&
         isa<ConstantSDNode>(User->getOperand(1))) {
-      Shift = cast<ConstantSDNode>(User->getOperand(1))->getZExtValue();
+      Shift = User->getConstantOperandVal(1);
       User = *User->use_begin();
     }
 
@@ -13124,8 +13123,7 @@ SDValue DAGCombiner::visitINSERT_VECTOR_ELT(SDNode *N) {
   // do this only if indices are both constants and Idx1 < Idx0.
   if (InVec.getOpcode() == ISD::INSERT_VECTOR_ELT && InVec.hasOneUse()
       && isa<ConstantSDNode>(InVec.getOperand(2))) {
-    unsigned OtherElt =
-      cast<ConstantSDNode>(InVec.getOperand(2))->getZExtValue();
+    unsigned OtherElt = InVec.getConstantOperandVal(2);
     if (Elt < OtherElt) {
       // Swap nodes.
       SDValue NewOp = DAG.getNode(ISD::INSERT_VECTOR_ELT, DL, VT,
@@ -14069,7 +14067,7 @@ static SDValue combineConcatVectorOfExtracts(SDNode *N, SelectionDAG &DAG) {
 
     if (!isa<ConstantSDNode>(Op.getOperand(1)))
       return SDValue();
-    int ExtIdx = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
+    int ExtIdx = Op.getConstantOperandVal(1);
 
     // Ensure that we are extracting a subvector from a vector the same
     // size as the result.
@@ -15053,7 +15051,7 @@ SDValue DAGCombiner::visitINSERT_SUBVECTOR(SDNode *N) {
   if (N0.getOpcode() == ISD::INSERT_SUBVECTOR && N0.hasOneUse() &&
       N1.getValueType() == N0.getOperand(1).getValueType() &&
       isa<ConstantSDNode>(N0.getOperand(2))) {
-    unsigned OtherIdx = cast<ConstantSDNode>(N0.getOperand(2))->getZExtValue();
+    unsigned OtherIdx = N0.getConstantOperandVal(2);
     if (InsIdx < OtherIdx) {
       // Swap nodes.
       SDValue NewOp = DAG.getNode(ISD::INSERT_SUBVECTOR, SDLoc(N), VT,