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28fa9e1e9f
This change includes the most basic possible GCStrategy for a GC which is using the statepoint lowering code. At the moment, this GCStrategy doesn't really do much - aside from actually generate correct stackmaps that is - but I went ahead and added a few extra correctness checks as proof of concept. It's mostly here to provide documentation on how to do one, and to provide a point for various optimization legality hooks I'd like to add going forward. (For context, see the TODOs in InstCombine around gc.relocate.) Most of the validation logic added here as proof of concept will soon move in to the Verifier. That move is dependent on http://reviews.llvm.org/D6811 There was discussion in the review thread about addrspace(1) being reserved for something. I'm going to follow up on a seperate llvmdev thread. If needed, I'll update all the code at once. Note that I am deliberately not making a GCStrategy required to use gc.statepoints with this change. I want to give folks out of tree - including myself - a chance to migrate. In a week or two, I'll make having a GCStrategy be required for gc.statepoints. To this end, I added the gc tag to one of the test cases but not others. Differential Revision: http://reviews.llvm.org/D6808 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225365 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/GCs.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/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::createFastRegisterAllocator();
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(void) llvm::createBasicRegisterAllocator();
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(void) llvm::createGreedyRegisterAllocator();
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(void) llvm::createDefaultPBQPRegisterAllocator();
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llvm::linkOcamlGC();
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llvm::linkErlangGC();
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llvm::linkShadowStackGC();
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llvm::linkStatepointExampleGC();
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(void) llvm::createBURRListDAGScheduler(nullptr,
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llvm::CodeGenOpt::Default);
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(void) llvm::createSourceListDAGScheduler(nullptr,
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llvm::CodeGenOpt::Default);
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(void) llvm::createHybridListDAGScheduler(nullptr,
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llvm::CodeGenOpt::Default);
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(void) llvm::createFastDAGScheduler(nullptr, llvm::CodeGenOpt::Default);
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(void) llvm::createDefaultScheduler(nullptr, llvm::CodeGenOpt::Default);
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(void) llvm::createVLIWDAGScheduler(nullptr, 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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