mirror of
https://github.com/RPCS3/llvm.git
synced 2025-05-21 04:46:17 +00:00
0818e789cb
The DEBUG() macro is very generic so it might clash with other projects. The renaming was done as follows: - git grep -l 'DEBUG' | xargs sed -i 's/\bDEBUG\s\?(/LLVM_DEBUG(/g' - git diff -U0 master | ../clang/tools/clang-format/clang-format-diff.py -i -p1 -style LLVM - Manual change to APInt - Manually chage DOCS as regex doesn't match it. In the transition period the DEBUG() macro is still present and aliased to the LLVM_DEBUG() one. Differential Revision: https://reviews.llvm.org/D43624 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@332240 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
//===-- lib/CodeGen/GlobalISel/GICombiner.cpp -----------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file constains common code to combine machine functions at generic
|
|
// level.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/CodeGen/GlobalISel/Combiner.h"
|
|
#include "llvm/CodeGen/GlobalISel/CombinerInfo.h"
|
|
#include "llvm/CodeGen/GlobalISel/MachineIRBuilder.h"
|
|
#include "llvm/CodeGen/MachineOptimizationRemarkEmitter.h"
|
|
#include "llvm/CodeGen/GlobalISel/GISelWorkList.h"
|
|
#include "llvm/ADT/PostOrderIterator.h"
|
|
#include "llvm/CodeGen/GlobalISel/Utils.h"
|
|
#include "llvm/CodeGen/MachineRegisterInfo.h"
|
|
#include "llvm/Support/Debug.h"
|
|
|
|
#define DEBUG_TYPE "gi-combiner"
|
|
|
|
using namespace llvm;
|
|
|
|
Combiner::Combiner(CombinerInfo &Info, const TargetPassConfig *TPC)
|
|
: CInfo(Info), TPC(TPC) {
|
|
(void)this->TPC; // FIXME: Remove when used.
|
|
}
|
|
|
|
bool Combiner::combineMachineInstrs(MachineFunction &MF) {
|
|
// If the ISel pipeline failed, do not bother running this pass.
|
|
// FIXME: Should this be here or in individual combiner passes.
|
|
if (MF.getProperties().hasProperty(
|
|
MachineFunctionProperties::Property::FailedISel))
|
|
return false;
|
|
|
|
MRI = &MF.getRegInfo();
|
|
Builder.setMF(MF);
|
|
|
|
LLVM_DEBUG(dbgs() << "Generic MI Combiner for: " << MF.getName() << '\n');
|
|
|
|
MachineOptimizationRemarkEmitter MORE(MF, /*MBFI=*/nullptr);
|
|
|
|
bool MFChanged = false;
|
|
bool Changed;
|
|
|
|
do {
|
|
// Collect all instructions. Do a post order traversal for basic blocks and
|
|
// insert with list bottom up, so while we pop_back_val, we'll traverse top
|
|
// down RPOT.
|
|
Changed = false;
|
|
GISelWorkList<512> WorkList;
|
|
for (MachineBasicBlock *MBB : post_order(&MF)) {
|
|
if (MBB->empty())
|
|
continue;
|
|
for (auto MII = MBB->rbegin(), MIE = MBB->rend(); MII != MIE;) {
|
|
MachineInstr *CurMI = &*MII;
|
|
++MII;
|
|
// Erase dead insts before even adding to the list.
|
|
if (isTriviallyDead(*CurMI, *MRI)) {
|
|
LLVM_DEBUG(dbgs() << *CurMI << "Is dead; erasing.\n");
|
|
CurMI->eraseFromParentAndMarkDBGValuesForRemoval();
|
|
continue;
|
|
}
|
|
WorkList.insert(CurMI);
|
|
}
|
|
}
|
|
// Main Loop. Process the instructions here.
|
|
while (!WorkList.empty()) {
|
|
MachineInstr *CurrInst = WorkList.pop_back_val();
|
|
LLVM_DEBUG(dbgs() << "Try combining " << *CurrInst << "\n";);
|
|
Changed |= CInfo.combine(*CurrInst, Builder);
|
|
}
|
|
MFChanged |= Changed;
|
|
} while (Changed);
|
|
|
|
return MFChanged;
|
|
}
|