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Move a few containers out of ScheduleDAGInstrs::BuildSchedGraph

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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
This commit is contained in:
Dan Gohman
2009-01-15 19:20:50 +00:00
parent 6ad2b2a3d2
commit 79ce276083
28 changed files with 144 additions and 155 deletions
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20
include/llvm/CodeGen/ScheduleDAGInstrs.h
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@@ -16,6 +16,7 @@
#define LLVM_CODEGEN_SCHEDULEDAGINSTRS_H
#include "llvm/CodeGen/ScheduleDAG.h"
#include "llvm/Target/TargetRegisterInfo.h"
namespace llvm {
class MachineLoopInfo;
@@ -25,11 +26,22 @@ namespace llvm {
const MachineLoopInfo &MLI;
const MachineDominatorTree &MDT;
/// Defs, Uses - Remember where defs and uses of each physical register
/// are as we iterate upward through the instructions. This is allocated
/// here instead of inside BuildSchedGraph to avoid the need for it to be
/// initialized and destructed for each block.
std::vector<SUnit *> Defs[TargetRegisterInfo::FirstVirtualRegister];
std::vector<SUnit *> Uses[TargetRegisterInfo::FirstVirtualRegister];
/// PendingLoads - Remember where unknown loads are after the most recent
/// unknown store, as we iterate. As with Defs and Uses, this is here
/// to minimize construction/destruction.
std::vector<SUnit *> PendingLoads;
public:
ScheduleDAGInstrs(MachineBasicBlock *bb,
const TargetMachine &tm,
const MachineLoopInfo &mli,
const MachineDominatorTree &mdt);
explicit ScheduleDAGInstrs(MachineFunction &mf,
const MachineLoopInfo &mli,
const MachineDominatorTree &mdt);
virtual ~ScheduleDAGInstrs() {}