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Fix DAGCombine to deal with ext-conversion of pre/post_inc loads.

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The test case for this will come with the PPC indexed preinc loads commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158822 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Hal Finkel 2012-06-20 15:42:48 +00:00
parent 9905dbc379
commit d65e463ff9
1 changed files with 8 additions and 1 deletions
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9
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -2524,7 +2524,14 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
Load->getOffset(), Load->getMemoryVT(), Load->getOffset(), Load->getMemoryVT(),
Load->getMemOperand()); Load->getMemOperand());
// Replace uses of the EXTLOAD with the new ZEXTLOAD. // Replace uses of the EXTLOAD with the new ZEXTLOAD.
CombineTo(Load, NewLoad.getValue(0), NewLoad.getValue(1)); if (Load->getNumValues() == 3) {
// PRE/POST_INC loads have 3 values.
SDValue To[] = { NewLoad.getValue(0), NewLoad.getValue(1),
NewLoad.getValue(2) };
CombineTo(Load, To, 3, true);
} else {
CombineTo(Load, NewLoad.getValue(0), NewLoad.getValue(1));
}
} }
// Fold the AND away, taking care not to fold to the old load node if we // Fold the AND away, taking care not to fold to the old load node if we