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Add a -regalloc=default option that chooses a register allocator based on the -O

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optimization level.

This only really affects llc for now because both the llvm-gcc and clang front
ends override the default register allocator. I intend to remove that code later.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104904 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen
2010-05-27 23:57:25 +00:00
parent 1fa1c7b23b
commit 700bfada63
7 changed files with 28 additions and 13 deletions
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5
include/llvm/CodeGen/Passes.h
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@@ -85,9 +85,10 @@ namespace llvm {
///
FunctionPass *createDeadMachineInstructionElimPass();
/// Creates a register allocator as the user specified on the command line.
/// Creates a register allocator as the user specified on the command line, or
/// picks one that matches OptLevel.
///
FunctionPass *createRegisterAllocator();
FunctionPass *createRegisterAllocator(CodeGenOpt::Level OptLevel);
/// LocalRegisterAllocation Pass - This pass register allocates the input code
/// a basic block at a time, yielding code better than the simple register