eac8e25ea5
The first member of the pair should be unsigned instead of Register because it is the hint type, 0 for simple (target independent) hints and other values for target dependent hints. Differential Revision: https://reviews.llvm.org/D146646
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
//===- ReduceVirtualRegisters.cpp - Specialized Delta Pass ----------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements a function which calls the Generic Delta pass in order
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// to simplify virtual registers in MIR.
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//
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//===----------------------------------------------------------------------===//
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#include "ReduceVirtualRegisters.h"
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#include "Delta.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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using namespace llvm;
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static void dropRegisterHintsFromFunction(Oracle &O, MachineFunction &MF) {
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MachineRegisterInfo &MRI = MF.getRegInfo();
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for (unsigned I = 0, E = MRI.getNumVirtRegs(); I != E; ++I) {
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Register Reg = Register::index2VirtReg(I);
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const std::pair<unsigned, SmallVector<Register, 4>> &Hints =
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MRI.getRegAllocationHints(Reg);
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if (Hints.second.empty())
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continue;
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if (!O.shouldKeep())
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MRI.clearSimpleHint(Reg);
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}
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}
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static void dropRegisterHintsFromFunctions(Oracle &O,
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ReducerWorkItem &WorkItem) {
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for (const Function &F : WorkItem.getModule()) {
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if (auto *MF = WorkItem.MMI->getMachineFunction(F))
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dropRegisterHintsFromFunction(O, *MF);
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}
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}
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void llvm::reduceVirtualRegisterHintsDeltaPass(TestRunner &Test) {
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runDeltaPass(Test, dropRegisterHintsFromFunctions,
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"Reducing virtual register hints from functions");
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}
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