[llvm] 3e8d200 - [SelectionDAG] Remove PromoteIntOp_EXTRACT_SUBVECTOR.

[Sander de Smalen via llvm-commits]

Author: Sander de Smalen
Date: 2021-09-22T14:23:35+01:00
New Revision: 3e8d2008f74245e9e1ca60bc97e4e619b0d42c6c

URL: https://github.com/llvm/llvm-project/commit/3e8d2008f74245e9e1ca60bc97e4e619b0d42c6c
DIFF: https://github.com/llvm/llvm-project/commit/3e8d2008f74245e9e1ca60bc97e4e619b0d42c6c.diff

LOG: [SelectionDAG] Remove PromoteIntOp_EXTRACT_SUBVECTOR.

This code seems untested and is likely obsolete, because this case
should already be handled by the code that legalizes the result type
of EXTRACT_SUBVECTOR.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D110061

Added: 
    

Modified: 
    llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
    llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h

Removed: 
    


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diff  --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
index a6a1b0b55831..0f5128a6caa0 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp
@@ -1577,7 +1577,6 @@ bool DAGTypeLegalizer::PromoteIntegerOperand(SDNode *N, unsigned OpNo) {
   case ISD::UINT_TO_FP:   Res = PromoteIntOp_UINT_TO_FP(N); break;
   case ISD::STRICT_UINT_TO_FP:  Res = PromoteIntOp_STRICT_UINT_TO_FP(N); break;
   case ISD::ZERO_EXTEND:  Res = PromoteIntOp_ZERO_EXTEND(N); break;
-  case ISD::EXTRACT_SUBVECTOR: Res = PromoteIntOp_EXTRACT_SUBVECTOR(N); break;
   case ISD::INSERT_SUBVECTOR: Res = PromoteIntOp_INSERT_SUBVECTOR(N); break;
 
   case ISD::SHL:
@@ -5094,16 +5093,6 @@ SDValue DAGTypeLegalizer::PromoteIntOp_INSERT_SUBVECTOR(SDNode *N) {
   return DAG.getAnyExtOrTrunc(Ext, dl, N->getValueType(0));
 }
 
-SDValue DAGTypeLegalizer::PromoteIntOp_EXTRACT_SUBVECTOR(SDNode *N) {
-  SDLoc dl(N);
-  SDValue V0 = GetPromotedInteger(N->getOperand(0));
-  MVT InVT = V0.getValueType().getSimpleVT();
-  MVT OutVT = MVT::getVectorVT(InVT.getVectorElementType(),
-                               N->getValueType(0).getVectorNumElements());
-  SDValue Ext = DAG.getNode(ISD::EXTRACT_SUBVECTOR, dl, OutVT, V0, N->getOperand(1));
-  return DAG.getNode(ISD::TRUNCATE, dl, N->getValueType(0), Ext);
-}
-
 SDValue DAGTypeLegalizer::PromoteIntOp_CONCAT_VECTORS(SDNode *N) {
   SDLoc dl(N);
 

diff  --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
index 1d46946364dd..89470c5a7ca5 100644
--- a/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
+++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeTypes.h
@@ -368,7 +368,6 @@ class LLVM_LIBRARY_VISIBILITY DAGTypeLegalizer {
   SDValue PromoteIntOp_BUILD_VECTOR(SDNode *N);
   SDValue PromoteIntOp_INSERT_VECTOR_ELT(SDNode *N, unsigned OpNo);
   SDValue PromoteIntOp_EXTRACT_VECTOR_ELT(SDNode *N);
-  SDValue PromoteIntOp_EXTRACT_SUBVECTOR(SDNode *N);
   SDValue PromoteIntOp_INSERT_SUBVECTOR(SDNode *N);
   SDValue PromoteIntOp_CONCAT_VECTORS(SDNode *N);
   SDValue PromoteIntOp_SCALAR_TO_VECTOR(SDNode *N);