mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-27 21:30:51 +00:00
68092989f3
This file lists every pass in LLVM, and is included by Pass.h, which is very popular. Every time we add, remove, or rename a pass in LLVM, it caused lots of recompilation. I found this fact by looking at this table, which is sorted by the number of times a file was changed over the last 100,000 git commits multiplied by the number of object files that depend on it in the current checkout: recompiles touches affected_files header 342380 95 3604 llvm/include/llvm/ADT/STLExtras.h 314730 234 1345 llvm/include/llvm/InitializePasses.h 307036 118 2602 llvm/include/llvm/ADT/APInt.h 213049 59 3611 llvm/include/llvm/Support/MathExtras.h 170422 47 3626 llvm/include/llvm/Support/Compiler.h 162225 45 3605 llvm/include/llvm/ADT/Optional.h 158319 63 2513 llvm/include/llvm/ADT/Triple.h 140322 39 3598 llvm/include/llvm/ADT/StringRef.h 137647 59 2333 llvm/include/llvm/Support/Error.h 131619 73 1803 llvm/include/llvm/Support/FileSystem.h Before this change, touching InitializePasses.h would cause 1345 files to recompile. After this change, touching it only causes 550 compiles in an incremental rebuild. Reviewers: bkramer, asbirlea, bollu, jdoerfert Differential Revision: https://reviews.llvm.org/D70211
78 lines
2.7 KiB
C++
78 lines
2.7 KiB
C++
//===-- llvm/CodeGen/FinalizeISel.cpp ---------------------------*- C++ -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
/// This pass expands Pseudo-instructions produced by ISel, fixes register
|
|
/// reservations and may do machine frame information adjustments.
|
|
/// The pseudo instructions are used to allow the expansion to contain control
|
|
/// flow, such as a conditional move implemented with a conditional branch and a
|
|
/// phi, or an atomic operation implemented with a loop.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/MachineFunction.h"
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/Passes.h"
|
|
#include "llvm/CodeGen/TargetLowering.h"
|
|
#include "llvm/CodeGen/TargetSubtargetInfo.h"
|
|
#include "llvm/InitializePasses.h"
|
|
#include "llvm/Support/Debug.h"
|
|
using namespace llvm;
|
|
|
|
#define DEBUG_TYPE "finalize-isel"
|
|
|
|
namespace {
|
|
class FinalizeISel : public MachineFunctionPass {
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
FinalizeISel() : MachineFunctionPass(ID) {}
|
|
|
|
private:
|
|
bool runOnMachineFunction(MachineFunction &MF) override;
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const override {
|
|
MachineFunctionPass::getAnalysisUsage(AU);
|
|
}
|
|
};
|
|
} // end anonymous namespace
|
|
|
|
char FinalizeISel::ID = 0;
|
|
char &llvm::FinalizeISelID = FinalizeISel::ID;
|
|
INITIALIZE_PASS(FinalizeISel, DEBUG_TYPE,
|
|
"Finalize ISel and expand pseudo-instructions", false, false)
|
|
|
|
bool FinalizeISel::runOnMachineFunction(MachineFunction &MF) {
|
|
bool Changed = false;
|
|
const TargetLowering *TLI = MF.getSubtarget().getTargetLowering();
|
|
|
|
// Iterate through each instruction in the function, looking for pseudos.
|
|
for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I) {
|
|
MachineBasicBlock *MBB = &*I;
|
|
for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end();
|
|
MBBI != MBBE; ) {
|
|
MachineInstr &MI = *MBBI++;
|
|
|
|
// If MI is a pseudo, expand it.
|
|
if (MI.usesCustomInsertionHook()) {
|
|
Changed = true;
|
|
MachineBasicBlock *NewMBB = TLI->EmitInstrWithCustomInserter(MI, MBB);
|
|
// The expansion may involve new basic blocks.
|
|
if (NewMBB != MBB) {
|
|
MBB = NewMBB;
|
|
I = NewMBB->getIterator();
|
|
MBBI = NewMBB->begin();
|
|
MBBE = NewMBB->end();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
TLI->finalizeLowering(MF);
|
|
|
|
return Changed;
|
|
}
|