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Fix a dag combiner bug exposed by my recent instcombine patch. This fixes

Browse Source 
CodeGen/Generic/2006-11-10-DAGCombineMiscompile.ll and PPC gsm/toast


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31644 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-11-10 21:37:15 +00:00
parent 6832780bda
commit 734c91d250
1 changed files with 1 additions and 1 deletions

2
lib/CodeGen/SelectionDAG/DAGCombiner.cpp

@ -1723,7 +1723,7 @@ SDOperand DAGCombiner::visitXOR(SDNode *N) {
abort(); abort();
} }
// fold !(x or y) -> (!x and !y) iff x or y are setcc // fold !(x or y) -> (!x and !y) iff x or y are setcc
if (N1C && N1C->getValue() == 1 && if (N1C && N1C->getValue() == 1 && VT == MVT::i1 &&
(N0.getOpcode() == ISD::OR || N0.getOpcode() == ISD::AND)) { (N0.getOpcode() == ISD::OR || N0.getOpcode() == ISD::AND)) {
SDOperand LHS = N0.getOperand(0), RHS = N0.getOperand(1); SDOperand LHS = N0.getOperand(0), RHS = N0.getOperand(1);
if (isOneUseSetCC(RHS) || isOneUseSetCC(LHS)) { if (isOneUseSetCC(RHS) || isOneUseSetCC(LHS)) {