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[SelectionDAG] Teach the vector scalarizer about TRUNCATE.

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When a truncate node defines a legal vector type but uses an illegal
vector type, the legalization process was splitting the vector until
<1 x vector> type, but then it was failing to scalarize the node because
it did not know how to handle TRUNCATE.

<rdar://problem/14989896>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190830 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Quentin Colombet
2013-09-17 00:26:56 +00:00
parent 06b005f17a
commit 24e1b39a24
3 changed files with 24 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/CodeGen/SelectionDAG/LegalizeTypes.h
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@@ -537,7 +537,7 @@ private:
// Vector Operand Scalarization: <1 x ty> -> ty.
bool ScalarizeVectorOperand(SDNode *N, unsigned OpNo);
SDValue ScalarizeVecOp_BITCAST(SDNode *N);
SDValue ScalarizeVecOp_EXTEND(SDNode *N);
SDValue ScalarizeVecOp_UnaryOp(SDNode *N);
SDValue ScalarizeVecOp_CONCAT_VECTORS(SDNode *N);
SDValue ScalarizeVecOp_EXTRACT_VECTOR_ELT(SDNode *N);
SDValue ScalarizeVecOp_STORE(StoreSDNode *N, unsigned OpNo);

5
lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
View File

@@ -371,7 +371,8 @@ bool DAGTypeLegalizer::ScalarizeVectorOperand(SDNode *N, unsigned OpNo) {
case ISD::ANY_EXTEND:
case ISD::ZERO_EXTEND:
case ISD::SIGN_EXTEND:
Res = ScalarizeVecOp_EXTEND(N);
case ISD::TRUNCATE:
Res = ScalarizeVecOp_UnaryOp(N);
break;
case ISD::CONCAT_VECTORS:
Res = ScalarizeVecOp_CONCAT_VECTORS(N);
@@ -410,7 +411,7 @@ SDValue DAGTypeLegalizer::ScalarizeVecOp_BITCAST(SDNode *N) {
/// ScalarizeVecOp_EXTEND - If the value to extend is a vector that needs
/// to be scalarized, it must be <1 x ty>. Extend the element instead.
SDValue DAGTypeLegalizer::ScalarizeVecOp_EXTEND(SDNode *N) {
SDValue DAGTypeLegalizer::ScalarizeVecOp_UnaryOp(SDNode *N) {
assert(N->getValueType(0).getVectorNumElements() == 1 &&
"Unexected vector type!");
SDValue Elt = GetScalarizedVector(N->getOperand(0));