llvm-svn: 159030

It is both smaller and faster than DenseMap.

llvm-svn: 159029

There is no need to check for physreg live ranges. They don't exist any
more.

llvm-svn: 159019

Everyone is using on-demand regunit ranges now.

llvm-svn: 159018

With regunit liveness permanently enabled, this function would always
return true.

Also remove now obsolete code for checking physreg interference.

llvm-svn: 159006

Register allocators depend on it being permanently enabled now.

llvm-svn: 158873

Deterministically enumerate the virtual registers instead.

llvm-svn: 158872

Soon we won't need to compute live intervals for physical registers.

llvm-svn: 158865

Regunit live ranges are computed on demand, so when mi-sched calls
handleMove, some regunits may not have live ranges yet.

That makes updating them easier: Just skip the non-existing ranges. They
will be computed correctly from the rescheduled machine code when they
are needed.

llvm-svn: 158831

llvm-svn: 158827

When LiveIntervals is tracking fixed interference in regunits, make sure
to update those intervals as well. Currently guarded by -live-regunits.

llvm-svn: 158766

llvm-svn: 158755

Remat has been stable for years, and it isn't done by
LiveIntervalAnalysis any longer. (See LiveRangeEdit).

llvm-svn: 158079

llvm-svn: 158037

Don't print out the register number and spill weight, making the TRI
argument unnecessary.

This allows callers to interpret the reg field. It can currently be a
virtual register, a physical register, a spill slot, or a register unit.

llvm-svn: 158031

Instead of computing a live interval per physreg, LiveIntervals can
compute live intervals per register unit. This makes impossible the
confusing situation where aliasing registers could have overlapping live
intervals. It should also make fixed interferernce checking cheaper
since registers have fewer register units than aliases.

Live intervals for regunits are computed on demand, using MRI use-def
chains and the new LiveRangeCalc class. Only regunits live in to ABI
blocks are precomputed during LiveIntervals::runOnMachineFunction().

The regunit liveness computations don't depend on LiveVariables.

llvm-svn: 158029

Rematerialization is handled by LiveRangeEdit now.

llvm-svn: 157974

llvm-svn: 157963

No functional change.

llvm-svn: 157957

ranges for the instruction about to be bundled. This fixes a bug in an external
project where an assertion was triggered due to spurious 'multiple defs' within
the bundle.

Patch by Ivan Llopard. Thanks Ivan!

llvm-svn: 157632

llvm-svn: 157145

LiveIntervalUpdate validators weren't recorded after the calls to std::for_each.  Turns out std::for_each doesn't update the variable passed in for the functor but instead copy constructs a new one.

llvm-svn: 155041

llvm-svn: 153162

llvm-svn: 153158

The first def of a virtual register cannot also read the register.
Assert on such bad machine code instead of trying to fix it.
TwoAddressInstructionPass should never create code like that.

llvm-svn: 152010

This allows the function to be inlined, and makes it suitable for use in
getInstructionIndex().

Also provide a const version. C++ is great for touch typing practice.

llvm-svn: 151782

bundles. This method takes a bundle start and an MI being bundled, and makes
the intervals for the MI's operands appear to start/end on the bundle start.

Also fixes some minor cosmetic issues (whitespace, naming convention) in the
HMEditor code.

llvm-svn: 151099

llvm-svn: 151006

llvm-svn: 150921

llvm-svn: 150915

llvm-svn: 150914

llvm-svn: 150912

llvm-svn: 150910

Defer sanity checks on live intervals until after all have been updated. Hold (LiveInterval, LiveRange) pairs to update, rather than vregs.

llvm-svn: 150909

llvm-svn: 150851

llvm-svn: 150841

llvm-svn: 150840

any changes.

Internally this adds a private inner class HMEditor, to LiveIntervals. HMEditor provides
an API for updating live intervals when code is moved or bundled.

llvm-svn: 150826

llvm-svn: 150771

llvm-svn: 150768