Changes in directory llvm/lib/CodeGen/SelectionDAG:
DAGCombiner.cpp updated: 1.167 -> 1.168
---
Log message:
Two simplifications for token factor nodes: simplify tf(x,x) -> x.
simplify tf(x,y,y,z) -> tf(x,y,z).
---
Diffs of the changes: (+6 -2)
DAGCombiner.cpp | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
Index: llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.167
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.168
--- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp:1.167 Tue May 9 01:55:15 2006
+++ llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp Fri May 12 00:01:37 2006
@@ -680,7 +680,8 @@
// If the token factor has two operands and one is the entry token, replace
// the token factor with the other operand.
if (N->getNumOperands() == 2) {
- if (N->getOperand(0).getOpcode() == ISD::EntryToken)
+ if (N->getOperand(0).getOpcode() == ISD::EntryToken ||
+ N->getOperand(0) == N->getOperand(1))
return N->getOperand(1);
if (N->getOperand(1).getOpcode() == ISD::EntryToken)
return N->getOperand(0);
@@ -694,8 +695,11 @@
Changed = true;
for (unsigned j = 0, e = Op.getNumOperands(); j != e; ++j)
Ops.push_back(Op.getOperand(j));
- } else {
+ } else if (i == 0 || N->getOperand(i) != N->getOperand(i-1)) {
Ops.push_back(Op);
+ } else {
+ // Deleted an operand that was the same as the last one.
+ Changed = true;
}
}
if (Changed)
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
