mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-07 16:54:48 +00:00
default, this option is not enabled to support clients who rely on this behavior. Fixes http://llvm.org/PR4483 A patch to allocate additional memory for globals after we run out is forthcoming. Patch by Reid Kleckner! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75059 91177308-0d34-0410-b5e6-96231b3b80d8
127 lines
4.1 KiB
C++
127 lines
4.1 KiB
C++
//===- JITEmitter.cpp - Unit tests for the JIT code emitter ---------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "llvm/ADT/OwningPtr.h"
|
|
#include "llvm/BasicBlock.h"
|
|
#include "llvm/Constant.h"
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/ExecutionEngine/JIT.h"
|
|
#include "llvm/ExecutionEngine/JITMemoryManager.h"
|
|
#include "llvm/Function.h"
|
|
#include "llvm/GlobalValue.h"
|
|
#include "llvm/GlobalVariable.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/ModuleProvider.h"
|
|
#include "llvm/Support/IRBuilder.h"
|
|
#include "llvm/Target/TargetSelect.h"
|
|
#include "llvm/Type.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
|
|
Function *makeReturnGlobal(std::string Name, GlobalVariable *G, Module *M) {
|
|
std::vector<const Type*> params;
|
|
const FunctionType *FTy = FunctionType::get(Type::VoidTy, params, false);
|
|
Function *F = Function::Create(FTy, GlobalValue::ExternalLinkage, Name, M);
|
|
BasicBlock *Entry = BasicBlock::Create("entry", F);
|
|
IRBuilder<> builder(Entry);
|
|
Value *Load = builder.CreateLoad(G);
|
|
const Type *GTy = G->getType()->getElementType();
|
|
Value *Add = builder.CreateAdd(Load, ConstantInt::get(GTy, 1LL));
|
|
builder.CreateStore(Add, G);
|
|
builder.CreateRet(Add);
|
|
return F;
|
|
}
|
|
|
|
// Regression test for a bug. The JIT used to allocate globals inside the same
|
|
// memory block used for the function, and when the function code was freed,
|
|
// the global was left in the same place. This test allocates a function
|
|
// that uses and global, deallocates it, and then makes sure that the global
|
|
// stays alive after that.
|
|
TEST(JIT, GlobalInFunction) {
|
|
LLVMContext context;
|
|
Module *M = new Module("<main>", context);
|
|
ExistingModuleProvider *MP = new ExistingModuleProvider(M);
|
|
|
|
JITMemoryManager *MemMgr = JITMemoryManager::CreateDefaultMemManager();
|
|
// Tell the memory manager to poison freed memory so that accessing freed
|
|
// memory is more easily tested.
|
|
MemMgr->setPoisonMemory(true);
|
|
std::string Error;
|
|
OwningPtr<ExecutionEngine> JIT(ExecutionEngine::createJIT(
|
|
MP,
|
|
&Error,
|
|
MemMgr,
|
|
CodeGenOpt::Default,
|
|
false)); // This last argument enables the fix.
|
|
ASSERT_EQ(Error, "");
|
|
|
|
// Create a global variable.
|
|
const Type *GTy = Type::Int32Ty;
|
|
GlobalVariable *G = new GlobalVariable(
|
|
*M,
|
|
GTy,
|
|
false, // Not constant.
|
|
GlobalValue::InternalLinkage,
|
|
Constant::getNullValue(GTy),
|
|
"myglobal");
|
|
|
|
// Make a function that points to a global.
|
|
Function *F1 = makeReturnGlobal("F1", G, M);
|
|
|
|
// Get the pointer to the native code to force it to JIT the function and
|
|
// allocate space for the global.
|
|
void (*F1Ptr)();
|
|
// Hack to avoid ISO C++ warning about casting function pointers.
|
|
*(void**)(void*)&F1Ptr = JIT->getPointerToFunction(F1);
|
|
|
|
// Since F1 was codegen'd, a pointer to G should be available.
|
|
int32_t *GPtr = (int32_t*)JIT->getPointerToGlobalIfAvailable(G);
|
|
ASSERT_NE((int32_t*)NULL, GPtr);
|
|
EXPECT_EQ(0, *GPtr);
|
|
|
|
// F1() should increment G.
|
|
F1Ptr();
|
|
EXPECT_EQ(1, *GPtr);
|
|
|
|
// Make a second function identical to the first, referring to the same
|
|
// global.
|
|
Function *F2 = makeReturnGlobal("F2", G, M);
|
|
// Hack to avoid ISO C++ warning about casting function pointers.
|
|
void (*F2Ptr)();
|
|
*(void**)(void*)&F2Ptr = JIT->getPointerToFunction(F2);
|
|
|
|
// F2() should increment G.
|
|
F2Ptr();
|
|
EXPECT_EQ(2, *GPtr);
|
|
|
|
// Deallocate F1.
|
|
JIT->freeMachineCodeForFunction(F1);
|
|
|
|
// F2() should *still* increment G.
|
|
F2Ptr();
|
|
EXPECT_EQ(3, *GPtr);
|
|
}
|
|
|
|
// TODO(rnk): This seems to only run once for both tests, which is unexpected.
|
|
// That works just fine, but we shouldn't duplicate the code.
|
|
class JITEnvironment : public testing::Environment {
|
|
virtual void SetUp() {
|
|
// Required for ExecutionEngine::createJIT to create a JIT.
|
|
InitializeNativeTarget();
|
|
}
|
|
};
|
|
testing::Environment* const jit_env =
|
|
testing::AddGlobalTestEnvironment(new JITEnvironment);
|
|
|
|
}
|