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llvm-api.cpp
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llvm-api.cpp
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// This file is a part of Julia. License is MIT: https://julialang.org/license
// Extensions of the LLVM C API for LLVM.jl
//
// These are part of the Julia repository as they need to be
// built with the same C++ toolchain Julia & LLVM are built with
//
// They are not to be considered a stable API, and will be removed
// when better package build systems are available
#include "llvm-version.h"
#include <llvm-c/Core.h>
#include <llvm-c/Types.h>
#include <llvm/ADT/Triple.h>
#include <llvm/Analysis/TargetLibraryInfo.h>
#include <llvm/IR/Attributes.h>
#include <llvm/IR/CallSite.h>
#include <llvm/IR/DebugInfo.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/GlobalValue.h>
#include <llvm/IR/Instruction.h>
#include <llvm/IR/LegacyPassManager.h>
#include <llvm/IR/Module.h>
#include <llvm/Support/TargetSelect.h>
#include <llvm/Transforms/IPO.h>
#include "julia.h"
using namespace llvm::legacy;
namespace llvm {
// Initialization functions
//
// The LLVMInitialize* functions and friends are defined `static inline`
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllTargetInfos()
{
InitializeAllTargetInfos();
}
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllTargets()
{
InitializeAllTargets();
}
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllTargetMCs()
{
InitializeAllTargetMCs();
}
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllAsmPrinters()
{
InitializeAllAsmPrinters();
}
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllAsmParsers()
{
InitializeAllAsmParsers();
}
extern "C" JL_DLLEXPORT void LLVMExtraInitializeAllDisassemblers()
{
InitializeAllDisassemblers();
}
extern "C" JL_DLLEXPORT LLVMBool LLVMExtraInitializeNativeTarget()
{
return InitializeNativeTarget();
}
extern "C" JL_DLLEXPORT LLVMBool LLVMExtraInitializeNativeAsmParser()
{
return InitializeNativeTargetAsmParser();
}
extern "C" JL_DLLEXPORT LLVMBool LLVMExtraInitializeNativeAsmPrinter()
{
return InitializeNativeTargetAsmPrinter();
}
extern "C" JL_DLLEXPORT LLVMBool LLVMExtraInitializeNativeDisassembler()
{
return InitializeNativeTargetDisassembler();
}
// Exporting the Barrier LLVM pass
extern "C" JL_DLLEXPORT void LLVMExtraAddBarrierNoopPass(LLVMPassManagerRef PM)
{
unwrap(PM)->add(createBarrierNoopPass());
}
// Infrastructure for writing LLVM passes in Julia
typedef struct LLVMOpaquePass *LLVMPassRef;
DEFINE_STDCXX_CONVERSION_FUNCTIONS(Pass, LLVMPassRef)
extern "C" JL_DLLEXPORT void
LLVMExtraAddPass(LLVMPassManagerRef PM, LLVMPassRef P)
{
unwrap(PM)->add(unwrap(P));
}
StringMap<char *> PassIDs;
char &CreatePassID(const char *Name)
{
std::string NameStr(Name);
if (PassIDs.find(NameStr) != PassIDs.end())
return *PassIDs[NameStr];
else
return *(PassIDs[NameStr] = new char);
}
class JuliaModulePass : public ModulePass {
public:
JuliaModulePass(const char *Name, jl_value_t *Callback)
: ModulePass(CreatePassID(Name)), Callback(Callback)
{
}
bool runOnModule(Module &M)
{
jl_value_t **argv;
JL_GC_PUSHARGS(argv, 2);
argv[0] = Callback;
argv[1] = jl_box_voidpointer(wrap(&M));
jl_value_t *ret = jl_apply(argv, 2);
bool changed = jl_unbox_bool(ret);
JL_GC_POP();
return changed;
}
private:
jl_value_t *Callback;
};
extern "C" JL_DLLEXPORT LLVMPassRef
LLVMExtraCreateModulePass(const char *Name, jl_value_t *Callback)
{
return wrap(new JuliaModulePass(Name, Callback));
}
class JuliaFunctionPass : public FunctionPass {
public:
JuliaFunctionPass(const char *Name, jl_value_t *Callback)
: FunctionPass(CreatePassID(Name)), Callback(Callback)
{
}
bool runOnFunction(Function &Fn)
{
jl_value_t **argv;
JL_GC_PUSHARGS(argv, 2);
argv[0] = Callback;
argv[1] = jl_box_voidpointer(wrap(&Fn));
jl_value_t *ret = jl_apply(argv, 2);
bool changed = jl_unbox_bool(ret);
JL_GC_POP();
return changed;
}
private:
jl_value_t *Callback;
};
extern "C" JL_DLLEXPORT LLVMPassRef
LLVMExtraCreateFunctionPass(const char *Name, jl_value_t *Callback)
{
return wrap(new JuliaFunctionPass(Name, Callback));
}
// Various missing functions
extern "C" JL_DLLEXPORT unsigned int LLVMExtraGetDebugMDVersion()
{
return DEBUG_METADATA_VERSION;
}
extern "C" JL_DLLEXPORT LLVMContextRef LLVMExtraGetValueContext(LLVMValueRef V)
{
return wrap(&unwrap(V)->getContext());
}
extern "C" JL_DLLEXPORT void
LLVMExtraAddTargetLibraryInfoByTiple(const char *T, LLVMPassManagerRef PM)
{
unwrap(PM)->add(new TargetLibraryInfoWrapperPass(Triple(T)));
}
extern "C" JL_DLLEXPORT void LLVMExtraAddInternalizePassWithExportList(
LLVMPassManagerRef PM, const char **ExportList, size_t Length)
{
auto PreserveFobj = [=](const GlobalValue &GV) {
for (size_t i = 0; i < Length; i++) {
if (strcmp(ExportList[i], GV.getName().data()) == 0)
return true;
}
return false;
};
unwrap(PM)->add(createInternalizePass(PreserveFobj));
}
// Awaiting D46627
extern "C" JL_DLLEXPORT int LLVMExtraGetSourceLocation(LLVMValueRef V, int index,
const char** Name,
const char** Filename,
unsigned int* Line,
unsigned int* Column)
{
if (auto I = dyn_cast<Instruction>(unwrap(V))) {
const DILocation* DIL = I->getDebugLoc();
if (!DIL)
return 0;
for (int i = index; i > 0; i--) {
DIL = DIL->getInlinedAt();
if (!DIL)
return 0;
}
*Name = DIL->getScope()->getName().data();
*Filename = DIL->getScope()->getFilename().data();
*Line = DIL->getLine();
*Column = DIL->getColumn();
return 1;
} else {
jl_exceptionf(jl_argumenterror_type, "Can only get source location information of instructions");
}
}
} // namespace llvm