Tell TargetLoweringOpt whether it is running before

or after legalize.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45321 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 4 insertions, 2 deletions

diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h
index 5439ff6..f96322f 100644
--- a/include/llvm/Target/TargetLowering.h
+++ b/include/llvm/Target/TargetLowering.h
@@ -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; 
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index a1d8ad9..6eaf7ae 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -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))