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RegisterPressure: ArrayRefize some functions for better readability. No functionality change.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155795 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer
2012-04-29 18:52:56 +00:00
parent 5fe019835c
commit 2b8d0501b1
2 changed files with 40 additions and 38 deletions
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66
lib/CodeGen/RegisterPressure.cpp
View File

@@ -59,28 +59,34 @@ void RegisterPressure::decrease(const TargetRegisterClass *RC,
decreaseSetPressure(MaxSetPressure, RC, TRI); decreaseSetPressure(MaxSetPressure, RC, TRI);
} }
/// Increase the current pressure as impacted by this physical register and bump /// Increase the current pressure as impacted by these physical registers and
/// the high water mark if needed. /// bump the high water mark if needed.
void RegPressureTracker::increasePhysRegPressure(unsigned Reg) { void RegPressureTracker::increasePhysRegPressure(ArrayRef<unsigned> Regs) {
for (unsigned I = 0, E = Regs.size(); I != E; ++I)
increaseSetPressure(CurrSetPressure, P.MaxSetPressure, increaseSetPressure(CurrSetPressure, P.MaxSetPressure,
TRI->getMinimalPhysRegClass(Reg), TRI); TRI->getMinimalPhysRegClass(Regs[I]), TRI);
} }
/// Simply decrease the current pressure as impacted by this physcial register. /// Simply decrease the current pressure as impacted by these physcial
void RegPressureTracker::decreasePhysRegPressure(unsigned Reg) { /// registers.
decreaseSetPressure(CurrSetPressure, TRI->getMinimalPhysRegClass(Reg), TRI); void RegPressureTracker::decreasePhysRegPressure(ArrayRef<unsigned> Regs) {
for (unsigned I = 0, E = Regs.size(); I != E; ++I)
decreaseSetPressure(CurrSetPressure, TRI->getMinimalPhysRegClass(Regs[I]),
TRI);
} }
/// Increase the current pressure as impacted by this virtual register and bump /// Increase the current pressure as impacted by these virtual registers and
/// the high water mark if needed. /// bump the high water mark if needed.
void RegPressureTracker::increaseVirtRegPressure(unsigned Reg) { void RegPressureTracker::increaseVirtRegPressure(ArrayRef<unsigned> Regs) {
for (unsigned I = 0, E = Regs.size(); I != E; ++I)
increaseSetPressure(CurrSetPressure, P.MaxSetPressure, increaseSetPressure(CurrSetPressure, P.MaxSetPressure,
MRI->getRegClass(Reg), TRI); MRI->getRegClass(Regs[I]), TRI);
} }
/// Simply decrease the current pressure as impacted by this virtual register. /// Simply decrease the current pressure as impacted by these virtual registers.
void RegPressureTracker::decreaseVirtRegPressure(unsigned Reg) { void RegPressureTracker::decreaseVirtRegPressure(ArrayRef<unsigned> Regs) {
decreaseSetPressure(CurrSetPressure, MRI->getRegClass(Reg), TRI); for (unsigned I = 0, E = Regs.size(); I != E; ++I)
decreaseSetPressure(CurrSetPressure, MRI->getRegClass(Regs[I]), TRI);
} }
/// Clear the result so it can be used for another round of pressure tracking. /// Clear the result so it can be used for another round of pressure tracking.
@@ -390,7 +396,9 @@ bool RegPressureTracker::recede() {
static_cast<RegionPressure&>(P).openTop(CurrPos); static_cast<RegionPressure&>(P).openTop(CurrPos);
// Find the previous instruction. // Find the previous instruction.
while (--CurrPos != MBB->begin() && CurrPos->isDebugValue()); do
--CurrPos;
while (CurrPos != MBB->begin() && CurrPos->isDebugValue());
if (CurrPos->isDebugValue()) { if (CurrPos->isDebugValue()) {
closeRegion(); closeRegion();
@@ -409,14 +417,10 @@ bool RegPressureTracker::recede() {
collectOperands(CurrPos, PhysRegOpers, VirtRegOpers, TRI, RCI); collectOperands(CurrPos, PhysRegOpers, VirtRegOpers, TRI, RCI);
// Boost pressure for all dead defs together. // Boost pressure for all dead defs together.
for (unsigned i = 0; i < PhysRegOpers.DeadDefs.size(); ++i) increasePhysRegPressure(PhysRegOpers.DeadDefs);
increasePhysRegPressure(PhysRegOpers.DeadDefs[i]); increaseVirtRegPressure(VirtRegOpers.DeadDefs);
for (unsigned i = 0; i < VirtRegOpers.DeadDefs.size(); ++i) decreasePhysRegPressure(PhysRegOpers.DeadDefs);
increaseVirtRegPressure(VirtRegOpers.DeadDefs[i]); decreaseVirtRegPressure(VirtRegOpers.DeadDefs);
for (unsigned i = 0; i < PhysRegOpers.DeadDefs.size(); ++i)
decreasePhysRegPressure(PhysRegOpers.DeadDefs[i]);
for (unsigned i = 0; i < VirtRegOpers.DeadDefs.size(); ++i)
decreaseVirtRegPressure(VirtRegOpers.DeadDefs[i]);
// Kill liveness at live defs. // Kill liveness at live defs.
// TODO: consider earlyclobbers? // TODO: consider earlyclobbers?
@@ -528,16 +532,14 @@ bool RegPressureTracker::advance() {
} }
// Boost pressure for all dead defs together. // Boost pressure for all dead defs together.
for (unsigned i = 0; i < PhysRegOpers.DeadDefs.size(); ++i) increasePhysRegPressure(PhysRegOpers.DeadDefs);
increasePhysRegPressure(PhysRegOpers.DeadDefs[i]); increaseVirtRegPressure(VirtRegOpers.DeadDefs);
for (unsigned i = 0; i < VirtRegOpers.DeadDefs.size(); ++i) decreasePhysRegPressure(PhysRegOpers.DeadDefs);
increaseVirtRegPressure(VirtRegOpers.DeadDefs[i]); decreaseVirtRegPressure(VirtRegOpers.DeadDefs);
for (unsigned i = 0; i < PhysRegOpers.DeadDefs.size(); ++i)
decreasePhysRegPressure(PhysRegOpers.DeadDefs[i]);
for (unsigned i = 0; i < VirtRegOpers.DeadDefs.size(); ++i)
decreaseVirtRegPressure(VirtRegOpers.DeadDefs[i]);
// Find the next instruction. // Find the next instruction.
while (++CurrPos != MBB->end() && CurrPos->isDebugValue()); do
++CurrPos;
while (CurrPos != MBB->end() && CurrPos->isDebugValue());
return true; return true;
} }

8
lib/CodeGen/RegisterPressure.h
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@@ -158,11 +158,11 @@ protected:
void closeTop(); void closeTop();
void closeBottom(); void closeBottom();
void increasePhysRegPressure(unsigned Reg); void increasePhysRegPressure(ArrayRef<unsigned> Regs);
void decreasePhysRegPressure(unsigned Reg); void decreasePhysRegPressure(ArrayRef<unsigned> Regs);
void increaseVirtRegPressure(unsigned Reg); void increaseVirtRegPressure(ArrayRef<unsigned> Regs);
void decreaseVirtRegPressure(unsigned Reg); void decreaseVirtRegPressure(ArrayRef<unsigned> Regs);
void discoverPhysLiveIn(unsigned Reg); void discoverPhysLiveIn(unsigned Reg);
void discoverPhysLiveOut(unsigned Reg); void discoverPhysLiveOut(unsigned Reg);