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Reapply r60997, this time without forgetting that

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target constants are allowed to have an illegal
type.

llvm-svn: 61006
This commit is contained in:
Duncan Sands 2008-12-14 09:43:15 +00:00
parent 4231a32eaf
commit ef671b5627
3 changed files with 15 additions and 8 deletions
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2
include/llvm/CodeGen/SelectionDAG.h
View File

@ -212,7 +212,7 @@ public:
///
/// Note that this is an involved process that may invalidate pointers into
/// the graph.
void Legalize();
void Legalize(bool TypesNeedLegalizing);
/// RemoveDeadNodes - This method deletes all unreachable nodes in the
/// SelectionDAG.

17
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
View File

@ -51,6 +51,7 @@ namespace {
class VISIBILITY_HIDDEN SelectionDAGLegalize {
TargetLowering &TLI;
SelectionDAG &DAG;
bool TypesNeedLegalizing;
// Libcall insertion helpers.
@ -127,7 +128,7 @@ class VISIBILITY_HIDDEN SelectionDAGLegalize {
}
public:
explicit SelectionDAGLegalize(SelectionDAG &DAG);
explicit SelectionDAGLegalize(SelectionDAG &DAG, bool TypesNeedLegalizing);
/// getTypeAction - Return how we should legalize values of this type, either
/// it is already legal or we need to expand it into multiple registers of
@ -348,8 +349,8 @@ SDNode *SelectionDAGLegalize::isShuffleLegal(MVT VT, SDValue Mask) const {
return TLI.isShuffleMaskLegal(Mask, VT) ? Mask.getNode() : 0;
}
SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag)
: TLI(dag.getTargetLoweringInfo()), DAG(dag),
SelectionDAGLegalize::SelectionDAGLegalize(SelectionDAG &dag, bool types)
: TLI(dag.getTargetLoweringInfo()), DAG(dag), TypesNeedLegalizing(types),
ValueTypeActions(TLI.getValueTypeActions()) {
assert(MVT::LAST_VALUETYPE <= 32 &&
"Too many value types for ValueTypeActions to hold!");
@ -488,6 +489,12 @@ bool SelectionDAGLegalize::LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
/// appropriate for its type.
void SelectionDAGLegalize::HandleOp(SDValue Op) {
MVT VT = Op.getValueType();
// If the type legalizer was run then we should never see any illegal result
// types here except for target constants (the type legalizer does not touch
// those).
assert((TypesNeedLegalizing || getTypeAction(VT) == Legal ||
Op.getOpcode() == ISD::TargetConstant) &&
"Illegal type introduced after type legalization?");
switch (getTypeAction(VT)) {
default: assert(0 && "Bad type action!");
case Legal: (void)LegalizeOp(Op); break;
@ -8602,9 +8609,9 @@ SDValue SelectionDAGLegalize::StoreWidenVectorOp(StoreSDNode *ST,
// SelectionDAG::Legalize - This is the entry point for the file.
//
void SelectionDAG::Legalize() {
void SelectionDAG::Legalize(bool TypesNeedLegalizing) {
/// run - This is the main entry point to this class.
///
SelectionDAGLegalize(*this).LegalizeDAG();
SelectionDAGLegalize(*this, TypesNeedLegalizing).LegalizeDAG();
}

4
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -620,9 +620,9 @@ void SelectionDAGISel::CodeGenAndEmitDAG() {
if (TimePassesIsEnabled) {
NamedRegionTimer T("DAG Legalization", GroupName);
CurDAG->Legalize();
CurDAG->Legalize(DisableLegalizeTypes);
} else {
CurDAG->Legalize();
CurDAG->Legalize(DisableLegalizeTypes);
}
DOUT << "Legalized selection DAG:\n";