/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/lib/Target/XCore/XCoreFrameToArgsOffsetElim.cpp
Line | Count | Source |
1 | | //===-- XCoreFrameToArgsOffsetElim.cpp ----------------------------*- C++ -*-=// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // Replace Pseudo FRAME_TO_ARGS_OFFSET with the appropriate real offset. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #include "XCore.h" |
14 | | #include "XCoreInstrInfo.h" |
15 | | #include "XCoreSubtarget.h" |
16 | | #include "llvm/CodeGen/MachineFrameInfo.h" |
17 | | #include "llvm/CodeGen/MachineFunctionPass.h" |
18 | | #include "llvm/CodeGen/MachineInstrBuilder.h" |
19 | | #include "llvm/Support/raw_ostream.h" |
20 | | #include "llvm/Target/TargetMachine.h" |
21 | | using namespace llvm; |
22 | | |
23 | | namespace { |
24 | | struct XCoreFTAOElim : public MachineFunctionPass { |
25 | | static char ID; |
26 | 70 | XCoreFTAOElim() : MachineFunctionPass(ID) {} |
27 | | |
28 | | bool runOnMachineFunction(MachineFunction &Fn) override; |
29 | 70 | MachineFunctionProperties getRequiredProperties() const override { |
30 | 70 | return MachineFunctionProperties().set( |
31 | 70 | MachineFunctionProperties::Property::NoVRegs); |
32 | 70 | } |
33 | | |
34 | 349 | StringRef getPassName() const override { |
35 | 349 | return "XCore FRAME_TO_ARGS_OFFSET Elimination"; |
36 | 349 | } |
37 | | }; |
38 | | char XCoreFTAOElim::ID = 0; |
39 | | } |
40 | | |
41 | | /// createXCoreFrameToArgsOffsetEliminationPass - returns an instance of the |
42 | | /// Frame to args offset elimination pass |
43 | 70 | FunctionPass *llvm::createXCoreFrameToArgsOffsetEliminationPass() { |
44 | 70 | return new XCoreFTAOElim(); |
45 | 70 | } |
46 | | |
47 | 279 | bool XCoreFTAOElim::runOnMachineFunction(MachineFunction &MF) { |
48 | 279 | const XCoreInstrInfo &TII = |
49 | 279 | *static_cast<const XCoreInstrInfo *>(MF.getSubtarget().getInstrInfo()); |
50 | 279 | unsigned StackSize = MF.getFrameInfo().getStackSize(); |
51 | 625 | for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E; |
52 | 346 | ++MFI) { |
53 | 346 | MachineBasicBlock &MBB = *MFI; |
54 | 346 | for (MachineBasicBlock::iterator MBBI = MBB.begin(), EE = MBB.end(); |
55 | 2.12k | MBBI != EE; ++MBBI1.78k ) { |
56 | 1.78k | if (MBBI->getOpcode() == XCore::FRAME_TO_ARGS_OFFSET) { |
57 | 12 | MachineInstr &OldInst = *MBBI; |
58 | 12 | unsigned Reg = OldInst.getOperand(0).getReg(); |
59 | 12 | MBBI = TII.loadImmediate(MBB, MBBI, Reg, StackSize); |
60 | 12 | OldInst.eraseFromParent(); |
61 | 12 | } |
62 | 1.78k | } |
63 | 346 | } |
64 | 279 | return true; |
65 | 279 | } |