mirror of
https://github.com/intel/llvm.git
synced 2026-01-14 11:57:39 +08:00
d55dfeaf32
As we are moving towards support for multiple fragments, loops that iterate over all basic blocks of a function, but do not depend on the order of basic blocks in the final layout, should iterate over binary functions directly, rather than the layout. Eventually, all loops using the layout list should either iterate over the function, or be aware of multiple layouts. This patch replaces references to binary function's block layout with the binary function itself where only little code changes are necessary. Reviewed By: maksfb Differential Revision: https://reviews.llvm.org/D129585
77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//===- bolt/Passes/ADRRelaxationPass.cpp ----------------------------------===//
|
|
//
|
|
// 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 file implements the ADRRelaxationPass class.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "bolt/Passes/ADRRelaxationPass.h"
|
|
#include "bolt/Core/ParallelUtilities.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace opts {
|
|
extern cl::OptionCategory BoltCategory;
|
|
|
|
static cl::opt<bool>
|
|
AdrPassOpt("adr-relaxation",
|
|
cl::desc("Replace ARM non-local ADR instructions with ADRP"),
|
|
cl::init(true), cl::cat(BoltCategory), cl::ReallyHidden);
|
|
} // namespace opts
|
|
|
|
namespace llvm {
|
|
namespace bolt {
|
|
|
|
void ADRRelaxationPass::runOnFunction(BinaryFunction &BF) {
|
|
BinaryContext &BC = BF.getBinaryContext();
|
|
for (BinaryBasicBlock &BB : BF) {
|
|
for (auto It = BB.begin(); It != BB.end(); ++It) {
|
|
MCInst &Inst = *It;
|
|
if (!BC.MIB->isADR(Inst))
|
|
continue;
|
|
|
|
const MCSymbol *Symbol = BC.MIB->getTargetSymbol(Inst);
|
|
if (!Symbol)
|
|
continue;
|
|
|
|
if (BF.hasIslandsInfo()) {
|
|
BinaryFunction::IslandInfo &Islands = BF.getIslandInfo();
|
|
if (Islands.Symbols.count(Symbol) || Islands.ProxySymbols.count(Symbol))
|
|
continue;
|
|
}
|
|
|
|
BinaryFunction *TargetBF = BC.getFunctionForSymbol(Symbol);
|
|
if (TargetBF && TargetBF == &BF)
|
|
continue;
|
|
|
|
MCPhysReg Reg;
|
|
BC.MIB->getADRReg(Inst, Reg);
|
|
int64_t Addend = BC.MIB->getTargetAddend(Inst);
|
|
InstructionListType Addr =
|
|
BC.MIB->materializeAddress(Symbol, BC.Ctx.get(), Reg, Addend);
|
|
It = BB.replaceInstruction(It, Addr);
|
|
}
|
|
}
|
|
}
|
|
|
|
void ADRRelaxationPass::runOnFunctions(BinaryContext &BC) {
|
|
if (!opts::AdrPassOpt || !BC.HasRelocations)
|
|
return;
|
|
|
|
ParallelUtilities::WorkFuncTy WorkFun = [&](BinaryFunction &BF) {
|
|
runOnFunction(BF);
|
|
};
|
|
|
|
ParallelUtilities::runOnEachFunction(
|
|
BC, ParallelUtilities::SchedulingPolicy::SP_TRIVIAL, WorkFun, nullptr,
|
|
"ADRRelaxationPass", /* ForceSequential */ true);
|
|
}
|
|
|
|
} // end namespace bolt
|
|
} // end namespace llvm
|