MachineInstr: Remove unused parameter.

llvm-svn: 237726

MachineRegisterInfo can access TII off of the MachineFunction's
subtarget and so doesn't need the TargetMachine or to access via
getSubtargetImpl. Update all callers.

llvm-svn: 227160

LiveIntervalAnalysis: Factor out code to update liveness on vreg def removal

This cleans up code and is more in line with the general philosophy of
modifying LiveIntervals through LiveIntervalAnalys

LiveIntervalAnalysis: Factor out code to update liveness on vreg def removal

This cleans up code and is more in line with the general philosophy of
modifying LiveIntervals through LiveIntervalAnalysis instead of changing
them directly.

This also fixes a case where SplitEditor::removeBackCopies() would miss
the subregister ranges.

llvm-svn: 226690

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LiveIntervalAnalysis: Factor out code to update liveness on physreg def removal

This cleans up code and is more in line with the general philosophy of
modifying LiveIntervals through LiveIntervalAna

LiveIntervalAnalysis: Factor out code to update liveness on physreg def removal

This cleans up code and is more in line with the general philosophy of
modifying LiveIntervals through LiveIntervalAnalysis instead of changing
them directly.

llvm-svn: 226687

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LiveRangeEdit: Check for completely empy subranges after removing ValNos.

Completely empty subranges are not allowed and must be removed when
subreg liveness is enabled.

llvm-svn: 224804

LiveInterval: Use range based for loops for subregister ranges.

llvm-svn: 223991

LiveInterval: Use more range based for loops for value numbers and segments.

llvm-svn: 223978

LiveRangeEdit: Adapt eliminateDeadDef() to subregister liveness.

llvm-svn: 223882

Add missing semicolon from r222118.

llvm-svn: 222119

Move register class name strings to a single array in MCRegisterInfo to reduce static table size and number of relocation entries.

Indices into the table are stored in each MCRegisterClass instead o

Move register class name strings to a single array in MCRegisterInfo to reduce static table size and number of relocation entries.

Indices into the table are stored in each MCRegisterClass instead of a pointer. A new method, getRegClassName, is added to MCRegisterInfo and TargetRegisterInfo to lookup the string in the table.

llvm-svn: 222118

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Add TargetInstrInfo interface isAsCheapAsAMove.

llvm-svn: 214158

[Modules] Remove potential ODR violations by sinking the DEBUG_TYPE
define below all header includes in the lib/CodeGen/... tree. While the
current modules implementation doesn't check for this kind

[Modules] Remove potential ODR violations by sinking the DEBUG_TYPE
define below all header includes in the lib/CodeGen/... tree. While the
current modules implementation doesn't check for this kind of ODR
violation yet, it is likely to grow support for it in the future. It
also removes one layer of macro pollution across all the included
headers.

Other sub-trees will follow.

llvm-svn: 206837

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[C++11] More 'nullptr' conversion. In some cases just using a boolean check instead of comparing to nullptr.

llvm-svn: 206142

Switch a number of loops in lib/CodeGen over to range-based for-loops, now that
the MachineRegisterInfo iterators are compatible with it.

llvm-svn: 204075

Phase 2 of the great MachineRegisterInfo cleanup. This time, we're changing
operator* on the by-operand iterators to return a MachineOperand& rather than
a MachineInstr&. At this point they almost

Phase 2 of the great MachineRegisterInfo cleanup. This time, we're changing
operator* on the by-operand iterators to return a MachineOperand& rather than
a MachineInstr&. At this point they almost behave like normal iterators!

Again, this requires making some existing loops more verbose, but should pave
the way for the big range-based for-loop cleanups in the future.

llvm-svn: 203865

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CalcSpillWeights: give a better describing name to calculateSpillWeights

Besides, this relates it more obviously to the VirtRegAuxInfo::calculateSpillWeightAndHint.

No functionnal change.

llvm-svn

CalcSpillWeights: give a better describing name to calculateSpillWeights

Besides, this relates it more obviously to the VirtRegAuxInfo::calculateSpillWeightAndHint.

No functionnal change.

llvm-svn: 194404

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Represent RegUnit liveness with LiveRange instance

Previously LiveInterval has been used, but having a spill weight and
register number is unnecessary for a register unit.

llvm-svn: 192397

Pass LiveQueryResult by value

This makes the API a bit more natural to use and makes it easier to make
LiveRanges implementation details private.

llvm-svn: 192394

Use LiveRangeQuery for instruction-level liveness queries.

Remove redundant or bug-prone LiveInterval APIs.

llvm-svn: 189685

Replace LiveInterval::killedAt with isKilledAtInstr.

Return true for LRGs that end at EarlyClobber or Register slots.

llvm-svn: 189642

Auto-compute live intervals on demand.

When new virtual registers are created during splitting/spilling, defer
creation of the live interval until we need to use the live interval.

Along with the r

Auto-compute live intervals on demand.

When new virtual registers are created during splitting/spilling, defer
creation of the live interval until we need to use the live interval.

Along with the recent commits to notify LiveRangeEdit when new virtual
registers are created, this makes it possible for functions like
TargetInstrInfo::loadRegFromStackSlot() and
TargetInstrInfo::storeRegToStackSlot() to create multiple virtual
registers as part of the process of generating loads/stores for
different register classes, and then have the live intervals for those
new registers computed when they are needed.

llvm-svn: 188437

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Notify LiveRangeEdit of new virtual registers.

Add a delegate class to MachineRegisterInfo with a single virtual
function, MRI_NoteNewVirtualRegister(). Update LiveRangeEdit to inherit
from this del

Notify LiveRangeEdit of new virtual registers.

Add a delegate class to MachineRegisterInfo with a single virtual
function, MRI_NoteNewVirtualRegister(). Update LiveRangeEdit to inherit
from this delegate class and override the definition of the callback
with an implementation that tracks the newly created virtual registers.

llvm-svn: 188435

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Track new virtual registers by register number.

Track new virtual registers by register number, rather than by the live
interval created for them. This is the first step in separating the
creation o

Track new virtual registers by register number.

Track new virtual registers by register number, rather than by the live
interval created for them. This is the first step in separating the
creation of new virtual registers and new live intervals. Eventually
live intervals will be created and populated on demand after the virtual
registers have been created and used in instructions.

llvm-svn: 188434

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Remove unnecessary parameter to RenumberValues.

Patch by Matthias Braun!

llvm-svn: 188393

Prevent LiveRangeEdit from deleting bundled instructions.

We have no targets on trunk that bundle before regalloc. However, we
have been advertising regalloc as bundle safe for use with out-of-tree

Prevent LiveRangeEdit from deleting bundled instructions.

We have no targets on trunk that bundle before regalloc. However, we
have been advertising regalloc as bundle safe for use with out-of-tree
targets. We need to at least contain the parts of the code that are
still unsafe.

llvm-svn: 184620

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