Simplify the LiveRangeEdit::canRematerializeAt() interface a bit.

llvm-svn: 118661

Don't assign new registers created during a split to the same stack slot, but
give them individual stack slots once the are actually spilled.

llvm-svn: 117945

Remember to keep track of rematted values.

llvm-svn: 116962

Move some of the InlineSpiller rematerialization code into LiveRangeEdit.

llvm-svn: 116951

Move stack slot assignments into LiveRangeEdit.

All registers created during splitting or spilling are assigned to the same
stack slot as the parent register.

When splitting or rematting, we may no

Move stack slot assignments into LiveRangeEdit.

All registers created during splitting or spilling are assigned to the same
stack slot as the parent register.

When splitting or rematting, we may not spill at all. In that case the stack
slot is still assigned, but it will be dead.

llvm-svn: 116546

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Create a new LiveRangeEdit class to keep track of the new registers created when
splitting or spillling, and to help with rematerialization.

Use LiveRangeEdit in InlineSpiller and SplitKit. This wil

Create a new LiveRangeEdit class to keep track of the new registers created when
splitting or spillling, and to help with rematerialization.

Use LiveRangeEdit in InlineSpiller and SplitKit. This will eventually make it
possible to share remat code between InlineSpiller and SplitKit.

llvm-svn: 116543

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