diff options
| author | Chris Lattner <sabre@nondot.org> | 2005-12-14 19:25:30 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2005-12-14 19:25:30 +0000 |
| commit | d4771840fd59654becb989675fbc0d0dc54c6dd4 (patch) | |
| tree | 4916247bd8d17348274383708f3c38641e77f7e8 | |
| parent | e4e49132af74a69aba92a35c38e1c87be8907ecd (diff) | |
When folding loads into ops, immediately replace uses of the op with the
load. This reduces number of worklist iterations and avoid missing optimizations
depending on folding of things into sext_inreg nodes (which aren't supported by
all targets).
Tested by Regression/CodeGen/X86/extend.ll:test2
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24712 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 8077709c94..031bf61c74 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -1554,7 +1554,7 @@ SDOperand DAGCombiner::visitSIGN_EXTEND(SDNode *N) { SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), N0.getValueType()); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad), ExtLoad.getValue(1)); return SDOperand(); @@ -1567,7 +1567,7 @@ SDOperand DAGCombiner::visitSIGN_EXTEND(SDNode *N) { SDOperand ExtLoad = DAG.getNode(ISD::SEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), N0.getOperand(3)); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad), ExtLoad.getValue(1)); return SDOperand(); @@ -1596,7 +1596,7 @@ SDOperand DAGCombiner::visitZERO_EXTEND(SDNode *N) { SDOperand ExtLoad = DAG.getExtLoad(ISD::ZEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), N0.getValueType()); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad), ExtLoad.getValue(1)); return SDOperand(); @@ -1609,7 +1609,7 @@ SDOperand DAGCombiner::visitZERO_EXTEND(SDNode *N) { SDOperand ExtLoad = DAG.getNode(ISD::ZEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), N0.getOperand(3)); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, DAG.getNode(ISD::TRUNCATE, N0.getValueType(), ExtLoad), ExtLoad.getValue(1)); return SDOperand(); @@ -1673,7 +1673,7 @@ SDOperand DAGCombiner::visitSIGN_EXTEND_INREG(SDNode *N) { SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), EVT); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, ExtLoad, ExtLoad.getValue(1)); return SDOperand(); } @@ -1684,7 +1684,7 @@ SDOperand DAGCombiner::visitSIGN_EXTEND_INREG(SDNode *N) { SDOperand ExtLoad = DAG.getExtLoad(ISD::SEXTLOAD, VT, N0.getOperand(0), N0.getOperand(1), N0.getOperand(2), EVT); - WorkList.push_back(N); + CombineTo(N, ExtLoad); CombineTo(N0.Val, ExtLoad, ExtLoad.getValue(1)); return SDOperand(); } |