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|
//===- llvm/unittest/CodeGen/X86MCInstLowerTest.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
//
//===----------------------------------------------------------------------===//
#include "TestAsmPrinter.h"
#include "llvm/AsmParser/Parser.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/MDBuilder.h"
#include "llvm/IR/Module.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "gtest/gtest.h"
namespace llvm {
class X86MCInstLowerTest : public testing::Test {
protected:
static void SetUpTestCase() {
InitializeAllTargetMCs();
InitializeAllTargetInfos();
InitializeAllTargets();
InitializeAllAsmPrinters();
}
// Function to setup codegen pipeline and returns the AsmPrinter.
AsmPrinter *addPassesToEmitFile(llvm::legacy::PassManagerBase &PM,
llvm::raw_pwrite_stream &Out,
llvm::CodeGenFileType FileType,
llvm::MachineModuleInfoWrapperPass *MMIWP) {
TargetPassConfig *PassConfig = TM->createPassConfig(PM);
PassConfig->setDisableVerify(true);
PM.add(PassConfig);
PM.add(MMIWP);
if (PassConfig->addISelPasses())
return nullptr;
PassConfig->addMachinePasses();
PassConfig->setInitialized();
MC.reset(new MCContext(TM->getTargetTriple(), TM->getMCAsmInfo(),
TM->getMCRegisterInfo(), TM->getMCSubtargetInfo()));
MC->setObjectFileInfo(TM->getObjFileLowering());
TM->getObjFileLowering()->Initialize(*MC, *TM);
MC->setObjectFileInfo(TM->getObjFileLowering());
// Use a new MCContext for AsmPrinter for testing.
// AsmPrinter.OutContext will be different from
// MachineFunction's MCContext in MMIWP.
Expected<std::unique_ptr<MCStreamer>> MCStreamerOrErr =
TM->createMCStreamer(Out, nullptr, FileType, *MC);
if (auto Err = MCStreamerOrErr.takeError())
return nullptr;
AsmPrinter *Printer =
TM->getTarget().createAsmPrinter(*TM, std::move(*MCStreamerOrErr));
if (!Printer)
return nullptr;
PM.add(Printer);
return Printer;
}
void SetUp() override {
// Module to compile.
const char *FooStr = R""""(
@G = external global i32
define i32 @foo() {
%1 = load i32, i32* @G; load the global variable
%2 = call i32 @f()
%3 = mul i32 %1, %2
ret i32 %3
}
declare i32 @f() #0
)"""";
StringRef AssemblyF(FooStr);
// Get target triple for X86_64
Triple TargetTriple("x86_64--");
std::string Error;
const Target *T = TargetRegistry::lookupTarget("", TargetTriple, Error);
// Skip the test if target is not built.
if (!T)
GTEST_SKIP();
// Get TargetMachine.
// Use Reloc::Model::PIC_ and CodeModel::Model::Large
// to get GOT during codegen as MO_ExternalSymbol.
TargetOptions Options;
TM = std::unique_ptr<TargetMachine>(T->createTargetMachine(
TargetTriple, "", "", Options, Reloc::Model::PIC_,
CodeModel::Model::Large, CodeGenOptLevel::Default));
if (!TM)
GTEST_SKIP();
SMDiagnostic SMError;
// Parse the module.
M = parseAssemblyString(AssemblyF, SMError, Context);
if (!M)
report_fatal_error(SMError.getMessage());
M->setDataLayout(TM->createDataLayout());
// Get llvm::Function from M
Foo = M->getFunction("foo");
if (!Foo)
report_fatal_error("foo?");
// Prepare the MCContext for codegen M.
// MachineFunction for Foo will have this MCContext.
MCFoo.reset(new MCContext(TargetTriple, TM->getMCAsmInfo(),
TM->getMCRegisterInfo(),
TM->getMCSubtargetInfo()));
MCFoo->setObjectFileInfo(TM->getObjFileLowering());
TM->getObjFileLowering()->Initialize(*MCFoo, *TM);
MCFoo->setObjectFileInfo(TM->getObjFileLowering());
}
LLVMContext Context;
std::unique_ptr<TargetMachine> TM;
std::unique_ptr<Module> M;
std::unique_ptr<MCContext> MC;
std::unique_ptr<MCContext> MCFoo;
Function *Foo;
std::unique_ptr<MachineFunction> MFFoo;
};
TEST_F(X86MCInstLowerTest, moExternalSymbol_MCSYMBOL) {
MachineModuleInfoWrapperPass *MMIWP =
new MachineModuleInfoWrapperPass(TM.get(), &*MCFoo);
SmallString<1024> Buf;
llvm::raw_svector_ostream OS(Buf);
legacy::PassManager PassMgrF;
AsmPrinter *Printer =
addPassesToEmitFile(PassMgrF, OS, CodeGenFileType::AssemblyFile, MMIWP);
PassMgrF.run(*M);
// Check GOT MCSymbol is from Printer.OutContext.
MCSymbol *GOTPrinterPtr =
Printer->OutContext.lookupSymbol("_GLOBAL_OFFSET_TABLE_");
// Check GOT MCSymbol is NOT from MachineFunction's MCContext.
MCSymbol *GOTMFCtxPtr =
MMIWP->getMMI().getMachineFunction(*Foo)->getContext().lookupSymbol(
"_GLOBAL_OFFSET_TABLE_");
EXPECT_NE(GOTPrinterPtr, nullptr);
EXPECT_EQ(GOTMFCtxPtr, nullptr);
}
} // end namespace llvm
|
