llvm-6502/include/llvm/CodeGen/LinkAllCodegenComponents.h
Dan Gohman 79ce276083 Move a few containers out of ScheduleDAGInstrs::BuildSchedGraph
and into the ScheduleDAGInstrs class, so that they don't get
destructed and re-constructed for each block. This fixes a
compile-time hot spot in the post-pass scheduler.

To help facilitate this, tidy and do some minor reorganization
in the scheduler constructor functions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62275 91177308-0d34-0410-b5e6-96231b3b80d8
2009-01-15 19:20:50 +00:00

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