96 lines
2.6 KiB
C++
96 lines
2.6 KiB
C++
//===- bolt/Passes/FixRISCVCallsPass.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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "bolt/Passes/FixRISCVCallsPass.h"
|
|
#include "bolt/Core/ParallelUtilities.h"
|
|
|
|
#include <iterator>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
namespace bolt {
|
|
|
|
void FixRISCVCallsPass::runOnFunction(BinaryFunction &BF) {
|
|
auto &BC = BF.getBinaryContext();
|
|
auto &MIB = BC.MIB;
|
|
auto *Ctx = BC.Ctx.get();
|
|
|
|
for (auto &BB : BF) {
|
|
for (auto II = BB.begin(); II != BB.end();) {
|
|
if (MIB->isCall(*II) && !MIB->isIndirectCall(*II)) {
|
|
auto *Target = MIB->getTargetSymbol(*II);
|
|
assert(Target && "Cannot find call target");
|
|
|
|
MCInst OldCall = *II;
|
|
auto L = BC.scopeLock();
|
|
|
|
if (MIB->isTailCall(*II))
|
|
MIB->createTailCall(*II, Target, Ctx);
|
|
else
|
|
MIB->createCall(*II, Target, Ctx);
|
|
|
|
MIB->moveAnnotations(std::move(OldCall), *II);
|
|
++II;
|
|
continue;
|
|
}
|
|
|
|
auto NextII = std::next(II);
|
|
|
|
if (NextII == BB.end())
|
|
break;
|
|
|
|
if (MIB->isRISCVCall(*II, *NextII)) {
|
|
auto *Target = MIB->getTargetSymbol(*II);
|
|
assert(Target && "Cannot find call target");
|
|
|
|
MCInst OldCall = *NextII;
|
|
auto L = BC.scopeLock();
|
|
|
|
if (MIB->isTailCall(*NextII))
|
|
MIB->createTailCall(*II, Target, Ctx);
|
|
else
|
|
MIB->createCall(*II, Target, Ctx);
|
|
|
|
MIB->moveAnnotations(std::move(OldCall), *II);
|
|
|
|
// The original offset was set on the jalr of the auipc+jalr pair. Since
|
|
// the whole pair is replaced by a call, adjust the offset by -4 (the
|
|
// size of a auipc).
|
|
if (std::optional<uint32_t> Offset = MIB->getOffset(*II)) {
|
|
assert(*Offset >= 4 && "Illegal jalr offset");
|
|
MIB->setOffset(*II, *Offset - 4);
|
|
}
|
|
|
|
II = BB.eraseInstruction(NextII);
|
|
continue;
|
|
}
|
|
|
|
++II;
|
|
}
|
|
}
|
|
}
|
|
|
|
Error FixRISCVCallsPass::runOnFunctions(BinaryContext &BC) {
|
|
if (!BC.isRISCV() || !BC.HasRelocations)
|
|
return Error::success();
|
|
|
|
ParallelUtilities::WorkFuncTy WorkFun = [&](BinaryFunction &BF) {
|
|
runOnFunction(BF);
|
|
};
|
|
|
|
ParallelUtilities::runOnEachFunction(
|
|
BC, ParallelUtilities::SchedulingPolicy::SP_INST_LINEAR, WorkFun, nullptr,
|
|
"FixRISCVCalls");
|
|
|
|
return Error::success();
|
|
}
|
|
|
|
} // namespace bolt
|
|
} // namespace llvm
|