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Revert r153516: "Invalidate liveness in Thumb2ITBlockPass."

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Revert r153519: "ARMLoadStoreOptimizer invalidates register liveness."

These patches caused miscompilations in povray by turning off branch
folding's updating of live-in lists.

It turns out the the late scheduler depends on the live-in lists, even
if it doesn't need correct kill flags.

<rdar://problem/11139228>

llvm-svn: 153593
This commit is contained in:
Jakob Stoklund Olesen 2012-03-28 20:11:44 +00:00
parent 7c56ad07a6
commit 2c29e5d7f9
2 changed files with 0 additions and 8 deletions
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4
lib/Target/ARM/ARMLoadStoreOptimizer.cpp
View File

@ -1411,10 +1411,6 @@ bool ARMLoadStoreOpt::runOnMachineFunction(MachineFunction &Fn) {
}
delete RS;
// Kill flags aren't updated accurately by this pass.
Fn.getRegInfo().invalidateLiveness();
return Modified;
}

4
lib/Target/ARM/Thumb2ITBlockPass.cpp
View File

@ -15,7 +15,6 @@
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineInstrBundle.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/Statistic.h"
using namespace llvm;
@ -259,9 +258,6 @@ bool Thumb2ITBlockPass::runOnMachineFunction(MachineFunction &Fn) {
if (!AFI->isThumbFunction())
return false;
// IT block insertion invalidates accurate register liveness.
Fn.getRegInfo().invalidateLiveness();
bool Modified = false;
for (MachineFunction::iterator MFI = Fn.begin(), E = Fn.end(); MFI != E; ) {
MachineBasicBlock &MBB = *MFI;