mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-29 07:53:33 +00:00
799c1ede71
RegAllocGreedy has been the default for six months now. Deleting RegAllocLinearScan makes it possible to also delete VirtRegRewriter and clean up the spiller code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144475 91177308-0d34-0410-b5e6-96231b3b80d8
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
//===-- Passes.cpp - Target independent code generation passes ------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file defines interfaces to access the target independent code
|
|
// generation passes provided by the LLVM backend.
|
|
//
|
|
//===---------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/RegAllocRegistry.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
|
|
using namespace llvm;
|
|
|
|
//===---------------------------------------------------------------------===//
|
|
///
|
|
/// RegisterRegAlloc class - Track the registration of register allocators.
|
|
///
|
|
//===---------------------------------------------------------------------===//
|
|
MachinePassRegistry RegisterRegAlloc::Registry;
|
|
|
|
static FunctionPass *createDefaultRegisterAllocator() { return 0; }
|
|
static RegisterRegAlloc
|
|
defaultRegAlloc("default",
|
|
"pick register allocator based on -O option",
|
|
createDefaultRegisterAllocator);
|
|
|
|
//===---------------------------------------------------------------------===//
|
|
///
|
|
/// RegAlloc command line options.
|
|
///
|
|
//===---------------------------------------------------------------------===//
|
|
static cl::opt<RegisterRegAlloc::FunctionPassCtor, false,
|
|
RegisterPassParser<RegisterRegAlloc> >
|
|
RegAlloc("regalloc",
|
|
cl::init(&createDefaultRegisterAllocator),
|
|
cl::desc("Register allocator to use"));
|
|
|
|
|
|
//===---------------------------------------------------------------------===//
|
|
///
|
|
/// createRegisterAllocator - choose the appropriate register allocator.
|
|
///
|
|
//===---------------------------------------------------------------------===//
|
|
FunctionPass *llvm::createRegisterAllocator(CodeGenOpt::Level OptLevel) {
|
|
RegisterRegAlloc::FunctionPassCtor Ctor = RegisterRegAlloc::getDefault();
|
|
|
|
if (!Ctor) {
|
|
Ctor = RegAlloc;
|
|
RegisterRegAlloc::setDefault(RegAlloc);
|
|
}
|
|
|
|
if (Ctor != createDefaultRegisterAllocator)
|
|
return Ctor();
|
|
|
|
// When the 'default' allocator is requested, pick one based on OptLevel.
|
|
switch (OptLevel) {
|
|
case CodeGenOpt::None:
|
|
return createFastRegisterAllocator();
|
|
default:
|
|
return createGreedyRegisterAllocator();
|
|
}
|
|
}
|