Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.222 -> 1.223
---
Log message:
Make sure that the node returned by SimplifySetCC is added to the worklist
so that it can be deleted if unused.
---
Diffs of the changes: (+5 -0)
DAGCombiner.cpp | 5 +++++
1 files changed, 5 insertions(+)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.222
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.223
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.222 Fri Oct 13 20:02:29 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri Oct 13 22:52:46 2006
@@ -1845,6 +1845,7 @@
// Determine if the condition we're dealing with is constant
SDOperand SCC = SimplifySetCC(TLI.getSetCCResultTy(), N0, N1, CC, false);
+ if (SCC.Val) AddToWorkList(SCC.Val);
if (ConstantSDNode *SCCC = dyn_cast_or_null<ConstantSDNode>(SCC.Val)) {
if (SCCC->getValue())
@@ -2660,6 +2661,8 @@
// Use SimplifySetCC to simplify SETCC's.
SDOperand Simp = SimplifySetCC(MVT::i1, CondLHS, CondRHS, CC->get(), false);
+ if (Simp.Val) AddToWorkList(Simp.Val);
+
ConstantSDNode *SCCC = dyn_cast_or_null<ConstantSDNode>(Simp.Val);
// fold br_cc true, dest -> br dest (unconditional branch)
@@ -2669,6 +2672,7 @@
// fold br_cc false, dest -> unconditional fall through
if (SCCC && SCCC->isNullValue())
return N->getOperand(0);
+
// fold to a simpler setcc
if (Simp.Val && Simp.getOpcode() == ISD::SETCC)
return DAG.getNode(ISD::BR_CC, MVT::Other, N->getOperand(0),
@@ -3424,6 +3428,7 @@
// Determine if the condition we're dealing with is constant
SDOperand SCC = SimplifySetCC(TLI.getSetCCResultTy(), N0, N1, CC, false);
+ if (SCC.Val) AddToWorkList(SCC.Val);
ConstantSDNode *SCCC = dyn_cast_or_null<ConstantSDNode>(SCC.Val);
// fold select_cc true, x, y -> x
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