Temporarily revert r71010. It was causing massive failures during self-hosting.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71138 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 5f19660..faaa41b 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -193,7 +193,7 @@
// Perform stack slot coloring.
if (OptLevel != CodeGenOpt::None)
- PM.add(createStackSlotColoringPass(OptLevel >= CodeGenOpt::Aggressive));
+ PM.add(createStackSlotColoringPass());
if (PrintMachineCode) // Print the register-allocated code
PM.add(createMachineFunctionPrinterPass(cerr));
diff --git a/lib/CodeGen/StackSlotColoring.cpp b/lib/CodeGen/StackSlotColoring.cpp
index 18fe59f..0d9b85a 100644
--- a/lib/CodeGen/StackSlotColoring.cpp
+++ b/lib/CodeGen/StackSlotColoring.cpp
@@ -37,22 +37,21 @@
cl::desc("Suppress slot sharing during stack coloring"));
static cl::opt<bool>
-ColorWithRegsOpt("color-ss-with-regs",
- cl::init(false), cl::Hidden,
- cl::desc("Color stack slots with free registers"));
+ColorWithRegs("color-ss-with-regs",
+ cl::init(false), cl::Hidden,
+ cl::desc("Color stack slots with free registers"));
static cl::opt<int> DCELimit("ssc-dce-limit", cl::init(-1), cl::Hidden);
STATISTIC(NumEliminated, "Number of stack slots eliminated due to coloring");
STATISTIC(NumRegRepl, "Number of stack slot refs replaced with reg refs");
-STATISTIC(NumLoadElim, "Number of loads eliminated");
+STATISTIC(NumLoadElim, "Number of load eliminated");
STATISTIC(NumStoreElim, "Number of stores eliminated");
STATISTIC(NumDead, "Number of trivially dead stack accesses eliminated");
namespace {
class VISIBILITY_HIDDEN StackSlotColoring : public MachineFunctionPass {
- bool ColorWithRegs;
LiveStacks* LS;
VirtRegMap* VRM;
MachineFrameInfo *MFI;
@@ -90,10 +89,7 @@
public:
static char ID; // Pass identification
- StackSlotColoring() :
- MachineFunctionPass(&ID), ColorWithRegs(false), NextColor(-1) {}
- StackSlotColoring(bool RegColor) :
- MachineFunctionPass(&ID), ColorWithRegs(RegColor), NextColor(-1) {}
+ StackSlotColoring() : MachineFunctionPass(&ID), NextColor(-1) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<LiveStacks>();
@@ -140,8 +136,8 @@
static RegisterPass<StackSlotColoring>
X("stack-slot-coloring", "Stack Slot Coloring");
-FunctionPass *llvm::createStackSlotColoringPass(bool RegColor) {
- return new StackSlotColoring(RegColor);
+FunctionPass *llvm::createStackSlotColoringPass() {
+ return new StackSlotColoring();
}
namespace {
@@ -235,7 +231,7 @@
StackSlotColoring::ColorSlotsWithFreeRegs(SmallVector<int, 16> &SlotMapping,
SmallVector<SmallVector<int, 4>, 16> &RevMap,
BitVector &SlotIsReg) {
- if (!(ColorWithRegs || ColorWithRegsOpt) || !VRM->HasUnusedRegisters())
+ if (!ColorWithRegs || !VRM->HasUnusedRegisters())
return false;
bool Changed = false;
@@ -243,9 +239,7 @@
for (unsigned i = 0, e = SSIntervals.size(); i != e; ++i) {
LiveInterval *li = SSIntervals[i];
int SS = li->getStackSlotIndex();
- if (!UsedColors[SS] || li->weight < 20)
- // If the weight is < 20, i.e. two references in a loop with depth 1,
- // don't bother with it.
+ if (!UsedColors[SS])
continue;
// These slots allow to share the same registers.
@@ -478,9 +472,6 @@
bool StackSlotColoring::PropagateBackward(MachineBasicBlock::iterator MII,
MachineBasicBlock *MBB,
unsigned OldReg, unsigned NewReg) {
- if (MII == MBB->begin())
- return false;
-
SmallVector<MachineOperand*, 4> Refs;
while (--MII != MBB->begin()) {
bool FoundDef = false; // Not counting 2address def.
@@ -531,9 +522,6 @@
bool StackSlotColoring::PropagateForward(MachineBasicBlock::iterator MII,
MachineBasicBlock *MBB,
unsigned OldReg, unsigned NewReg) {
- if (MII == MBB->end())
- return false;
-
SmallVector<MachineOperand*, 4> Uses;
while (++MII != MBB->end()) {
bool FoundUse = false;