Correctly add chain dependencies around calls and unknown-side-effect instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86080 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp
index 6070ff6..f8b219d 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -367,6 +367,7 @@
for (unsigned i = 0, e = I->second.size(); i != e; ++i)
I->second[i]->addPred(SDep(SU, SDep::Order, TrueMemOrderLatency));
I->second.clear();
+ I->second.push_back(SU);
}
// See if it is known to just have a single memory reference.
MachineInstr *ChainMI = Chain->getInstr();
@@ -413,7 +414,7 @@
if (Chain)
Chain->addPred(SDep(SU, SDep::Order, /*Latency=*/0));
}
- } else if (MayAlias) {
+ } else {
// Treat all other stores conservatively.
goto new_chain;
}
@@ -439,7 +440,7 @@
// Treat volatile loads conservatively. Note that this includes
// cases where memoperand information is unavailable.
goto new_chain;
- } else if (MayAlias) {
+ } else {
// A "MayAlias" load. Depend on the general chain, as well as on
// all stores. In the absense of MachineMemOperand information,
// we can't even assume that the load doesn't alias well-behaved