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https://github.com/c64scene-ar/llvm-6502.git
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ee2e403545
copy of the BURRList scheduler, but with several parts ripped out, such as backtracking, online topological sort maintenance (needed by backtracking), the priority queue, and Sethi-Ullman number computation and maintenance (needed by the priority queue). As a result of all this, it generates somewhat lower quality code, but that's its tradeoff for running about 30% faster than list-burr in -fast mode in many cases. This is somewhat experimental. Moving forward, major pieces of this can be refactored with pieces in common with ScheduleDAGRRList.cpp. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56307 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
2.0 KiB
C++
55 lines
2.0 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/ScheduleDAG.h"
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#include "llvm/CodeGen/GCs.h"
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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::createSimpleRegisterAllocator();
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(void) llvm::createLocalRegisterAllocator();
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(void) llvm::createBigBlockRegisterAllocator();
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(void) llvm::createLinearScanRegisterAllocator();
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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, NULL, NULL, false);
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(void) llvm::createTDRRListDAGScheduler(NULL, NULL, NULL, false);
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(void) llvm::createTDListDAGScheduler(NULL, NULL, NULL, false);
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(void) llvm::createFastDAGScheduler(NULL, NULL, NULL, false);
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(void) llvm::createDefaultScheduler(NULL, NULL, NULL, false);
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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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