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This is a prototype of an experimental register allocation

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framework. It's purpose is not to improve register allocation per se,
but to make it easier to develop powerful live range splitting. I call
it the basic allocator because it is as simple as a global allocator
can be but provides the building blocks for sophisticated register
allocation with live range splitting. 

A minimal implementation is provided that trivially spills whenever it
runs out of registers. I'm checking in now to get high-level design
and style feedback. I've only done minimal testing. The next step is
implementing a "greedy" allocation algorithm that does some register
reassignment and makes better splitting decisions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117174 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andrew Trick
2010-10-22 23:09:15 +00:00
parent c9db331433
commit 14e8d71cc9
8 changed files with 807 additions and 1 deletions
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include/llvm/CodeGen/LinkAllCodegenComponents.h
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@@ -34,6 +34,7 @@ namespace {
(void) llvm::createDeadMachineInstructionElimPass();
(void) llvm::createFastRegisterAllocator();
(void) llvm::createBasicRegisterAllocator();
(void) llvm::createLinearScanRegisterAllocator();
(void) llvm::createDefaultPBQPRegisterAllocator();