Fix non-deterministic SDNodeOrder-dependent codegen
Reset SelectionDAGBuilder's SDNodeOrder to ensure deterministic code
generation.
llvm-svn: 199050
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index e40a7c4..6c8e2f8 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -892,6 +892,7 @@
PendingExports.clear();
CurInst = NULL;
HasTailCall = false;
+ SDNodeOrder = LowestSDNodeOrder;
}
/// clearDanglingDebugInfo - Clear the dangling debug information
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
index d67c846..d32d13f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
@@ -488,6 +488,10 @@
private:
const TargetMachine &TM;
public:
+ /// Lowest valid SDNodeOrder. The special case 0 is reserved for scheduling
+ /// nodes without a corresponding SDNode.
+ static const unsigned LowestSDNodeOrder = 1;
+
SelectionDAG &DAG;
const DataLayout *TD;
AliasAnalysis *AA;
@@ -534,7 +538,7 @@
SelectionDAGBuilder(SelectionDAG &dag, FunctionLoweringInfo &funcinfo,
CodeGenOpt::Level ol)
- : CurInst(NULL), SDNodeOrder(0), TM(dag.getTarget()),
+ : CurInst(NULL), SDNodeOrder(LowestSDNodeOrder), TM(dag.getTarget()),
DAG(dag), FuncInfo(funcinfo), OptLevel(ol),
HasTailCall(false) {
}