bb3f5e1fed
Following discussions in #110443, and the following earlier discussions in https://lists.llvm.org/pipermail/llvm-dev/2017-October/117907.html, https://reviews.llvm.org/D38482, https://reviews.llvm.org/D38489, this PR attempts to overhaul the `TargetMachine` and `LLVMTargetMachine` interface classes. More specifically: 1. Makes `TargetMachine` the only class implemented under `TargetMachine.h` in the `Target` library. 2. `TargetMachine` contains target-specific interface functions that relate to IR/CodeGen/MC constructs, whereas before (at least on paper) it was supposed to have only IR/MC constructs. Any Target that doesn't want to use the independent code generator simply does not implement them, and returns either `false` or `nullptr`. 3. Renames `LLVMTargetMachine` to `CodeGenCommonTMImpl`. This renaming aims to make the purpose of `LLVMTargetMachine` clearer. Its interface was moved under the CodeGen library, to further emphasis its usage in Targets that use CodeGen directly. 4. Makes `TargetMachine` the only interface used across LLVM and its projects. With these changes, `CodeGenCommonTMImpl` is simply a set of shared function implementations of `TargetMachine`, and CodeGen users don't need to static cast to `LLVMTargetMachine` every time they need a CodeGen-specific feature of the `TargetMachine`. 5. More importantly, does not change any requirements regarding library linking. cc @arsenm @aeubanks
109 lines
4.1 KiB
C++
109 lines
4.1 KiB
C++
//===- MachineBasicBlockTest.cpp ------------------------------------------===//
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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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#include "llvm/CodeGen/MachineBasicBlock.h"
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#include "llvm/CodeGen/CodeGenTargetMachineImpl.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/CodeGen/TargetFrameLowering.h"
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#include "llvm/CodeGen/TargetInstrInfo.h"
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#include "llvm/CodeGen/TargetLowering.h"
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#include "llvm/CodeGen/TargetSubtargetInfo.h"
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#include "llvm/IR/DIBuilder.h"
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#include "llvm/IR/DebugInfoMetadata.h"
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#include "llvm/IR/IRBuilder.h"
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#include "llvm/IR/Module.h"
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#include "llvm/MC/TargetRegistry.h"
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#include "gmock/gmock.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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namespace {
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// Include helper functions to ease the manipulation of MachineFunctions.
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#include "MFCommon.inc"
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TEST(FindDebugLocTest, DifferentIterators) {
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LLVMContext Ctx;
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Module Mod("Module", Ctx);
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auto MF = createMachineFunction(Ctx, Mod);
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auto &MBB = *MF->CreateMachineBasicBlock();
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// Create metadata: CU, subprogram, some blocks and an inline function
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// scope.
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DIBuilder DIB(Mod);
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DIFile *OurFile = DIB.createFile("foo.c", "/bar");
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DICompileUnit *OurCU =
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DIB.createCompileUnit(dwarf::DW_LANG_C99, OurFile, "", false, "", 0);
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auto OurSubT = DIB.createSubroutineType(DIB.getOrCreateTypeArray({}));
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DISubprogram *OurFunc =
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DIB.createFunction(OurCU, "bees", "", OurFile, 1, OurSubT, 1,
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DINode::FlagZero, DISubprogram::SPFlagDefinition);
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DebugLoc DL0;
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DebugLoc DL1 = DILocation::get(Ctx, 1, 0, OurFunc);
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DebugLoc DL2 = DILocation::get(Ctx, 2, 0, OurFunc);
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DebugLoc DL3 = DILocation::get(Ctx, 3, 0, OurFunc);
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// Test using and empty MBB.
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EXPECT_EQ(DL0, MBB.findDebugLoc(MBB.instr_begin()));
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EXPECT_EQ(DL0, MBB.findDebugLoc(MBB.instr_end()));
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EXPECT_EQ(DL0, MBB.rfindDebugLoc(MBB.instr_rbegin()));
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EXPECT_EQ(DL0, MBB.rfindDebugLoc(MBB.instr_rend()));
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EXPECT_EQ(DL0, MBB.findPrevDebugLoc(MBB.instr_begin()));
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EXPECT_EQ(DL0, MBB.findPrevDebugLoc(MBB.instr_end()));
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EXPECT_EQ(DL0, MBB.rfindPrevDebugLoc(MBB.instr_rbegin()));
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EXPECT_EQ(DL0, MBB.rfindPrevDebugLoc(MBB.instr_rend()));
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// Insert two MIs with DebugLoc DL1 and DL3.
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// Also add a DBG_VALUE with a different DebugLoc in between.
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MCInstrDesc COPY = {TargetOpcode::COPY, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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MCInstrDesc DBG = {TargetOpcode::DBG_VALUE, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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auto MI3 = MF->CreateMachineInstr(COPY, DL3);
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MBB.insert(MBB.begin(), MI3);
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auto MI2 = MF->CreateMachineInstr(DBG, DL2);
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MBB.insert(MBB.begin(), MI2);
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auto MI1 = MF->CreateMachineInstr(COPY, DL1);
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MBB.insert(MBB.begin(), MI1);
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// Test using two MIs with a debug instruction in between.
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EXPECT_EQ(DL1, MBB.findDebugLoc(MBB.instr_begin()));
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EXPECT_EQ(DL1, MBB.findDebugLoc(MI1));
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EXPECT_EQ(DL3, MBB.findDebugLoc(MI2));
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EXPECT_EQ(DL3, MBB.findDebugLoc(MI3));
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EXPECT_EQ(DL0, MBB.findDebugLoc(MBB.instr_end()));
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EXPECT_EQ(DL1, MBB.rfindDebugLoc(MBB.instr_rend()));
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EXPECT_EQ(DL1, MBB.rfindDebugLoc(MI1));
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EXPECT_EQ(DL3, MBB.rfindDebugLoc(MI2));
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EXPECT_EQ(DL3, MBB.rfindDebugLoc(MI3));
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EXPECT_EQ(DL3, MBB.rfindDebugLoc(MBB.instr_rbegin()));
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EXPECT_EQ(DL0, MBB.findPrevDebugLoc(MBB.instr_begin()));
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EXPECT_EQ(DL0, MBB.findPrevDebugLoc(MI1));
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EXPECT_EQ(DL1, MBB.findPrevDebugLoc(MI2));
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EXPECT_EQ(DL1, MBB.findPrevDebugLoc(MI3));
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EXPECT_EQ(DL3, MBB.findPrevDebugLoc(MBB.instr_end()));
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EXPECT_EQ(DL0, MBB.rfindPrevDebugLoc(MBB.instr_rend()));
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EXPECT_EQ(DL0, MBB.rfindPrevDebugLoc(MI1));
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EXPECT_EQ(DL1, MBB.rfindPrevDebugLoc(MI2));
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EXPECT_EQ(DL1, MBB.rfindPrevDebugLoc(MI3));
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EXPECT_EQ(DL1, MBB.rfindPrevDebugLoc(MBB.instr_rbegin()));
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// Finalize DIBuilder to avoid memory leaks.
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DIB.finalize();
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}
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} // end namespace
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