Between scheduling regions, correctly maintain anti-dep breaking state so that we don't incorrectly rename registers that span these regions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85537 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/lib/CodeGen/AggressiveAntiDepBreaker.cpp
index 4d8ed69..5506a1f 100644
--- a/lib/CodeGen/AggressiveAntiDepBreaker.cpp
+++ b/lib/CodeGen/AggressiveAntiDepBreaker.cpp
@@ -195,8 +195,14 @@
unsigned InsertPosIndex) {
assert(Count < InsertPosIndex && "Instruction index out of expected range!");
+ std::set<unsigned> PassthruRegs;
+ GetPassthruRegs(MI, PassthruRegs);
+ PrescanInstruction(MI, Count, PassthruRegs);
+ ScanInstruction(MI, Count);
+
DEBUG(errs() << "Observe: ");
DEBUG(MI->dump());
+ DEBUG(errs() << "\tRegs:");
unsigned *DefIndices = State->GetDefIndices();
for (unsigned Reg = 0; Reg != TargetRegisterInfo::FirstVirtualRegister; ++Reg) {
@@ -215,11 +221,7 @@
DefIndices[Reg] = Count;
}
}
-
- std::set<unsigned> PassthruRegs;
- GetPassthruRegs(MI, PassthruRegs);
- PrescanInstruction(MI, Count, PassthruRegs);
- ScanInstruction(MI, Count);
+ DEBUG(errs() << '\n');
// We're starting a new schedule region so forget any saved state.
delete SavedState;