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https://github.com/c64scene-ar/llvm-6502.git
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14e8d71cc9
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
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
//===- llvm/Codegen/LinkAllCodegenComponents.h ------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file pulls in all codegen related passes for tools like lli and
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// llc that need this functionality.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
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#define LLVM_CODEGEN_LINKALLCODEGENCOMPONENTS_H
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#include "llvm/CodeGen/Passes.h"
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#include "llvm/CodeGen/SchedulerRegistry.h"
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#include "llvm/CodeGen/GCs.h"
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#include "llvm/Target/TargetMachine.h"
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#include <cstdlib>
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namespace {
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struct ForceCodegenLinking {
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ForceCodegenLinking() {
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// We must reference the passes in such a way that compilers will not
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// delete it all as dead code, even with whole program optimization,
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// yet is effectively a NO-OP. As the compiler isn't smart enough
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// to know that getenv() never returns -1, this will do the job.
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if (std::getenv("bar") != (char*) -1)
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return;
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(void) llvm::createDeadMachineInstructionElimPass();
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(void) llvm::createFastRegisterAllocator();
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(void) llvm::createBasicRegisterAllocator();
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(void) llvm::createLinearScanRegisterAllocator();
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(void) llvm::createDefaultPBQPRegisterAllocator();
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(void) llvm::createSimpleRegisterCoalescer();
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llvm::linkOcamlGC();
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llvm::linkShadowStackGC();
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(void) llvm::createBURRListDAGScheduler(NULL, llvm::CodeGenOpt::Default);
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(void) llvm::createTDRRListDAGScheduler(NULL, llvm::CodeGenOpt::Default);
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(void) llvm::createSourceListDAGScheduler(NULL,llvm::CodeGenOpt::Default);
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(void) llvm::createHybridListDAGScheduler(NULL,llvm::CodeGenOpt::Default);
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(void) llvm::createTDListDAGScheduler(NULL, llvm::CodeGenOpt::Default);
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(void) llvm::createFastDAGScheduler(NULL, llvm::CodeGenOpt::Default);
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(void) llvm::createDefaultScheduler(NULL, llvm::CodeGenOpt::Default);
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}
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} ForceCodegenLinking; // Force link by creating a global definition.
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}
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#endif
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