When optimizing with debug info, don't keep the
stoppoint nodes around until Legalize; doing this
imposed an ordering on a sequence of loads that
came from different lines, interfering with scheduling.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67692 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 8457bc3..a5d4caf 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -3895,10 +3895,11 @@
DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
if (DW && DW->ValidDebugInfo(SPI.getContext())) {
MachineFunction &MF = DAG.getMachineFunction();
- DAG.setRoot(DAG.getDbgStopPoint(getRoot(),
- SPI.getLine(),
- SPI.getColumn(),
- SPI.getContext()));
+ if (Fast)
+ DAG.setRoot(DAG.getDbgStopPoint(getRoot(),
+ SPI.getLine(),
+ SPI.getColumn(),
+ SPI.getContext()));
DICompileUnit CU(cast<GlobalVariable>(SPI.getContext()));
std::string Dir, FN;
unsigned SrcFile = DW->getOrCreateSourceID(CU.getDirectory(Dir),