Fix DAGCombine to deal with ext-conversion of pre/post_inc loads.
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
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 3517b7c..4b56e41 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -2524,7 +2524,14 @@
Load->getOffset(), Load->getMemoryVT(),
Load->getMemOperand());
// 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