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Tell TargetLoweringOpt whether it is running before 

or after legalize.

llvm-svn: 45321
This commit is contained in:
Chris Lattner 2007-12-22 20:56:36 +00:00
parent 843cad4df2
commit efd1cddb5a
2 changed files with 4 additions and 2 deletions
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4
llvm/include/llvm/Target/TargetLowering.h
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@ -557,10 +557,12 @@ public:
/// that want to combine
struct TargetLoweringOpt {
SelectionDAG &DAG;
bool AfterLegalize;
SDOperand Old;
SDOperand New;
explicit TargetLoweringOpt(SelectionDAG &InDAG) : DAG(InDAG) {}
explicit TargetLoweringOpt(SelectionDAG &InDAG, bool afterLegalize)
: DAG(InDAG), AfterLegalize(afterLegalize) {}
bool CombineTo(SDOperand O, SDOperand N) {
Old = O;

2
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
View File

@ -141,7 +141,7 @@ namespace {
/// it can be simplified or if things it uses can be simplified by bit
/// propagation. If so, return true.
bool SimplifyDemandedBits(SDOperand Op, uint64_t Demanded = ~0ULL) {
TargetLowering::TargetLoweringOpt TLO(DAG);
TargetLowering::TargetLoweringOpt TLO(DAG, AfterLegalize);
uint64_t KnownZero, KnownOne;
Demanded &= MVT::getIntVTBitMask(Op.getValueType());
if (!TLI.SimplifyDemandedBits(Op, Demanded, KnownZero, KnownOne, TLO))