void bcc::init::Initialize() {
static bool is_initialized = false;
if (is_initialized) {
return;
}
// Setup error handler for LLVM.
llvm::remove_fatal_error_handler();
llvm::install_fatal_error_handler(llvm_error_handler, NULL);
#if defined(PROVIDE_ARM_CODEGEN)
LLVMInitializeARMAsmPrinter();
# if USE_DISASSEMBLER
LLVMInitializeARMDisassembler();
# endif
LLVMInitializeARMTargetMC();
LLVMInitializeARMTargetInfo();
LLVMInitializeARMTarget();
MCLDInitializeARMLDTargetInfo();
MCLDInitializeARMLDTarget();
MCLDInitializeARMLDBackend();
MCLDInitializeARMDiagnosticLineInfo();
#endif
#if defined(PROVIDE_MIPS_CODEGEN)
LLVMInitializeMipsAsmPrinter();
# if USE_DISASSEMBLER
LLVMInitializeMipsDisassembler();
# endif
LLVMInitializeMipsTargetMC();
LLVMInitializeMipsTargetInfo();
LLVMInitializeMipsTarget();
MCLDInitializeMipsLDTargetInfo();
MCLDInitializeMipsLDTarget();
MCLDInitializeMipsLDBackend();
MCLDInitializeMipsDiagnosticLineInfo();
#endif
#if defined(PROVIDE_X86_CODEGEN)
LLVMInitializeX86AsmPrinter();
# if USE_DISASSEMBLER
LLVMInitializeX86Disassembler();
# endif
LLVMInitializeX86TargetMC();
LLVMInitializeX86TargetInfo();
LLVMInitializeX86Target();
MCLDInitializeX86LDTargetInfo();
MCLDInitializeX86LDTarget();
MCLDInitializeX86LDBackend();
MCLDInitializeX86DiagnosticLineInfo();
#endif
is_initialized = true;
return;
}
void Compiler::GlobalInitialization() {
if (GlobalInitialized)
return;
// if (!llvm::llvm_is_multithreaded())
// llvm::llvm_start_multithreaded();
// Set Triple, CPU and Features here
Triple = TARGET_TRIPLE_STRING;
#if defined(DEFAULT_ARM_CODEGEN)
#if defined(ARCH_ARM_HAVE_VFP)
Features.push_back("+vfp3");
#if !defined(ARCH_ARM_HAVE_VFP_D32)
Features.push_back("+d16");
#endif
#endif
// NOTE: Currently, we have to turn off the support for NEON explicitly.
// Since the ARMCodeEmitter.cpp is not ready for JITing NEON
// instructions.
// FIXME: Re-enable NEON when ARMCodeEmitter supports NEON.
#define USE_ARM_NEON 0
#if USE_ARM_NEON
Features.push_back("+neon");
Features.push_back("+neonfp");
#else
Features.push_back("-neon");
Features.push_back("-neonfp");
#endif // USE_ARM_NEON
#endif // DEFAULT_ARM_CODEGEN
#if defined(PROVIDE_ARM_CODEGEN)
LLVMInitializeARMAsmPrinter();
LLVMInitializeARMTargetMC();
LLVMInitializeARMTargetInfo();
LLVMInitializeARMTarget();
#endif
#if defined(PROVIDE_X86_CODEGEN)
LLVMInitializeX86AsmPrinter();
LLVMInitializeX86TargetMC();
LLVMInitializeX86TargetInfo();
LLVMInitializeX86Target();
#endif
#if USE_DISASSEMBLER
InitializeDisassembler();
#endif
// -O0: llvm::CodeGenOpt::None
// -O1: llvm::CodeGenOpt::Less
// -O2: llvm::CodeGenOpt::Default
// -O3: llvm::CodeGenOpt::Aggressive
CodeGenOptLevel = llvm::CodeGenOpt::Aggressive;
// Below are the global settings to LLVM
// Disable frame pointer elimination optimization
llvm::NoFramePointerElim = false;
// Use hardfloat ABI
//
// TODO(all): Need to detect the CPU capability and decide whether to use
// softfp. To use softfp, change following 2 lines to
//
// llvm::FloatABIType = llvm::FloatABI::Soft;
// llvm::UseSoftFloat = true;
//
llvm::FloatABIType = llvm::FloatABI::Soft;
llvm::UseSoftFloat = false;
// Register the scheduler
llvm::RegisterScheduler::setDefault(llvm::createDefaultScheduler);
// Register allocation policy:
// createFastRegisterAllocator: fast but bad quality
// createLinearScanRegisterAllocator: not so fast but good quality
llvm::RegisterRegAlloc::setDefault
((CodeGenOptLevel == llvm::CodeGenOpt::None) ?
llvm::createFastRegisterAllocator :
llvm::createLinearScanRegisterAllocator);
#if USE_CACHE
// Read in SHA1 checksum of libbcc and libRS.
readSHA1(sha1LibBCC_SHA1, sizeof(sha1LibBCC_SHA1), pathLibBCC_SHA1);
calcFileSHA1(sha1LibRS, pathLibRS);
#endif
GlobalInitialized = true;
}
int main(int Argc, char *Argv[]) {
int argc;
char *argv[128];
lGetAllArgs(Argc, Argv, argc, argv);
llvm::sys::AddSignalHandler(lSignal, NULL);
// initialize available LLVM targets
#ifndef __arm__
// FIXME: LLVM build on ARM doesn't build the x86 targets by default.
// It's not clear that anyone's going to want to generate x86 from an
// ARM host, though...
LLVMInitializeX86TargetInfo();
LLVMInitializeX86Target();
LLVMInitializeX86AsmPrinter();
LLVMInitializeX86AsmParser();
LLVMInitializeX86Disassembler();
LLVMInitializeX86TargetMC();
#endif // !__ARM__
#ifdef ISPC_ARM_ENABLED
// Generating ARM from x86 is more likely to be useful, though.
LLVMInitializeARMTargetInfo();
LLVMInitializeARMTarget();
LLVMInitializeARMAsmPrinter();
LLVMInitializeARMAsmParser();
LLVMInitializeARMDisassembler();
LLVMInitializeARMTargetMC();
#endif
#ifdef ISPC_NVPTX_ENABLED
LLVMInitializeNVPTXTargetInfo();
LLVMInitializeNVPTXTarget();
LLVMInitializeNVPTXAsmPrinter();
LLVMInitializeNVPTXTargetMC();
#endif /* ISPC_NVPTX_ENABLED */
char *file = NULL;
const char *headerFileName = NULL;
const char *outFileName = NULL;
const char *includeFileName = NULL;
const char *depsFileName = NULL;
const char *hostStubFileName = NULL;
const char *devStubFileName = NULL;
// Initiailize globals early so that we can set various option values
// as we're parsing below
g = new Globals;
Module::OutputType ot = Module::Object;
bool generatePIC = false;
const char *arch = NULL, *cpu = NULL, *target = NULL;
for (int i = 1; i < argc; ++i) {
if (!strcmp(argv[i], "--help"))
usage(0);
if (!strcmp(argv[i], "--help-dev"))
devUsage(0);
else if (!strncmp(argv[i], "-D", 2))
g->cppArgs.push_back(argv[i]);
else if (!strncmp(argv[i], "--addressing=", 13)) {
if (atoi(argv[i] + 13) == 64)
// FIXME: this doesn't make sense on 32 bit platform.
g->opt.force32BitAddressing = false;
else if (atoi(argv[i] + 13) == 32)
g->opt.force32BitAddressing = true;
else {
fprintf(stderr, "Addressing width \"%s\" invalid--only 32 and "
"64 are allowed.\n", argv[i]+13);
usage(1);
}
}
else if (!strncmp(argv[i], "--arch=", 7))
arch = argv[i] + 7;
else if (!strncmp(argv[i], "--cpu=", 6))
cpu = argv[i] + 6;
else if (!strcmp(argv[i], "--fast-math")) {
fprintf(stderr, "--fast-math option has been renamed to --opt=fast-math!\n");
usage(1);
}
else if (!strcmp(argv[i], "--fast-masked-vload")) {
fprintf(stderr, "--fast-masked-vload option has been renamed to "
"--opt=fast-masked-vload!\n");
usage(1);
}
else if (!strcmp(argv[i], "--debug"))
g->debugPrint = true;
else if (!strcmp(argv[i], "--instrument"))
g->emitInstrumentation = true;
else if (!strcmp(argv[i], "-g")) {
g->generateDebuggingSymbols = true;
}
else if (!strcmp(argv[i], "--emit-asm"))
ot = Module::Asm;
else if (!strcmp(argv[i], "--emit-c++"))
ot = Module::CXX;
else if (!strcmp(argv[i], "--emit-llvm"))
ot = Module::Bitcode;
else if (!strcmp(argv[i], "--emit-obj"))
ot = Module::Object;
else if (!strcmp(argv[i], "-I")) {
if (++i == argc) {
fprintf(stderr, "No path specified after -I option.\n");
usage(1);
}
lParseInclude(argv[i]);
}
else if (!strncmp(argv[i], "-I", 2))
lParseInclude(argv[i]+2);
else if (!strcmp(argv[i], "--fuzz-test"))
g->enableFuzzTest = true;
else if (!strncmp(argv[i], "--fuzz-seed=", 12))
g->fuzzTestSeed = atoi(argv[i] + 12);
else if (!strcmp(argv[i], "--target")) {
// FIXME: should remove this way of specifying the target...
if (++i == argc) {
fprintf(stderr, "No target specified after --target option.\n");
usage(1);
}
target = argv[i];
}
else if (!strncmp(argv[i], "--target=", 9))
target = argv[i] + 9;
else if (!strncmp(argv[i], "--math-lib=", 11)) {
const char *lib = argv[i] + 11;
if (!strcmp(lib, "default"))
g->mathLib = Globals::Math_ISPC;
else if (!strcmp(lib, "fast"))
g->mathLib = Globals::Math_ISPCFast;
else if (!strcmp(lib, "svml"))
g->mathLib = Globals::Math_SVML;
else if (!strcmp(lib, "system"))
g->mathLib = Globals::Math_System;
else {
fprintf(stderr, "Unknown --math-lib= option \"%s\".\n", lib);
usage(1);
}
}
else if (!strncmp(argv[i], "--opt=", 6)) {
const char *opt = argv[i] + 6;
if (!strcmp(opt, "fast-math"))
g->opt.fastMath = true;
else if (!strcmp(opt, "fast-masked-vload"))
g->opt.fastMaskedVload = true;
else if (!strcmp(opt, "disable-assertions"))
g->opt.disableAsserts = true;
else if (!strcmp(opt, "disable-loop-unroll"))
g->opt.unrollLoops = false;
else if (!strcmp(opt, "disable-fma"))
g->opt.disableFMA = true;
else if (!strcmp(opt, "force-aligned-memory"))
g->opt.forceAlignedMemory = true;
// These are only used for performance tests of specific
// optimizations
else if (!strcmp(opt, "disable-all-on-optimizations"))
g->opt.disableMaskAllOnOptimizations = true;
else if (!strcmp(opt, "disable-coalescing"))
g->opt.disableCoalescing = true;
else if (!strcmp(opt, "disable-handle-pseudo-memory-ops"))
g->opt.disableHandlePseudoMemoryOps = true;
else if (!strcmp(opt, "disable-blended-masked-stores"))
g->opt.disableBlendedMaskedStores = true;
else if (!strcmp(opt, "disable-coherent-control-flow"))
g->opt.disableCoherentControlFlow = true;
else if (!strcmp(opt, "disable-uniform-control-flow"))
g->opt.disableUniformControlFlow = true;
else if (!strcmp(opt, "disable-gather-scatter-optimizations"))
g->opt.disableGatherScatterOptimizations = true;
else if (!strcmp(opt, "disable-blending-removal"))
g->opt.disableMaskedStoreToStore = true;
else if (!strcmp(opt, "disable-gather-scatter-flattening"))
g->opt.disableGatherScatterFlattening = true;
else if (!strcmp(opt, "disable-uniform-memory-optimizations"))
g->opt.disableUniformMemoryOptimizations = true;
else {
fprintf(stderr, "Unknown --opt= option \"%s\".\n", opt);
usage(1);
}
}
else if (!strncmp(argv[i], "--force-alignment=", 18)) {
g->forceAlignment = atoi(argv[i] + 18);
}
else if (!strcmp(argv[i], "--woff") || !strcmp(argv[i], "-woff")) {
g->disableWarnings = true;
g->emitPerfWarnings = false;
}
else if (!strcmp(argv[i], "--werror"))
g->warningsAsErrors = true;
else if (!strcmp(argv[i], "--nowrap"))
g->disableLineWrap = true;
else if (!strcmp(argv[i], "--wno-perf") || !strcmp(argv[i], "-wno-perf"))
g->emitPerfWarnings = false;
else if (!strcmp(argv[i], "-o")) {
if (++i == argc) {
fprintf(stderr, "No output file specified after -o option.\n");
usage(1);
}
outFileName = argv[i];
}
else if (!strncmp(argv[i], "--outfile=", 10))
outFileName = argv[i] + strlen("--outfile=");
else if (!strcmp(argv[i], "-h")) {
if (++i == argc) {
fprintf(stderr, "No header file name specified after -h option.\n");
usage(1);
}
headerFileName = argv[i];
}
else if (!strncmp(argv[i], "--header-outfile=", 17)) {
headerFileName = argv[i] + strlen("--header-outfile=");
}
else if (!strncmp(argv[i], "--c++-include-file=", 19)) {
includeFileName = argv[i] + strlen("--c++-include-file=");
}
else if (!strcmp(argv[i], "-O0")) {
g->opt.level = 0;
}
else if (!strcmp(argv[i], "-O") || !strcmp(argv[i], "-O1") ||
!strcmp(argv[i], "-O2") || !strcmp(argv[i], "-O3")) {
g->opt.level = 1;
}
else if (!strcmp(argv[i], "-"))
;
else if (!strcmp(argv[i], "--nostdlib"))
g->includeStdlib = false;
else if (!strcmp(argv[i], "--nocpp"))
g->runCPP = false;
#ifndef ISPC_IS_WINDOWS
else if (!strcmp(argv[i], "--pic"))
generatePIC = true;
else if (!strcmp(argv[i], "--colored-output"))
g->forceColoredOutput = true;
#endif // !ISPC_IS_WINDOWS
else if (!strcmp(argv[i], "--quiet"))
g->quiet = true;
else if (!strcmp(argv[i], "--yydebug")) {
extern int yydebug;
yydebug = 1;
}
else if (!strcmp(argv[i], "-MMM")) {
if (++i == argc) {
fprintf(stderr, "No output file name specified after -MMM option.\n");
usage(1);
}
depsFileName = argv[i];
}
else if (!strcmp(argv[i], "--dev-stub")) {
if (++i == argc) {
fprintf(stderr, "No output file name specified after --dev-stub option.\n");
usage(1);
}
devStubFileName = argv[i];
}
else if (!strcmp(argv[i], "--host-stub")) {
if (++i == argc) {
fprintf(stderr, "No output file name specified after --host-stub option.\n");
usage(1);
}
hostStubFileName = argv[i];
}
else if (strncmp(argv[i], "--debug-phase=", 14) == 0) {
fprintf(stderr, "WARNING: Adding debug phases may change the way PassManager"
"handles the phases and it may possibly make some bugs go"
"away or introduce the new ones.\n");
g->debug_stages = ParsingPhases(argv[i] + strlen("--debug-phase="));
}
#if !defined(LLVM_3_2) && !defined(LLVM_3_3) // LLVM 3.4+
else if (strncmp(argv[i], "--debug-ir=", 11) == 0) {
g->debugIR = ParsingPhaseName(argv[i] + strlen("--debug-ir="));
}
#endif
else if (strncmp(argv[i], "--off-phase=", 12) == 0) {
g->off_stages = ParsingPhases(argv[i] + strlen("--off-phase="));
}
else if (!strcmp(argv[i], "-v") || !strcmp(argv[i], "--version")) {
lPrintVersion();
return 0;
}
else if (argv[i][0] == '-') {
fprintf(stderr, "Unknown option \"%s\".\n", argv[i]);
usage(1);
}
else {
if (file != NULL) {
fprintf(stderr, "Multiple input files specified on command "
"line: \"%s\" and \"%s\".\n", file, argv[i]);
usage(1);
}
else
file = argv[i];
}
}
if (g->enableFuzzTest) {
if (g->fuzzTestSeed == -1) {
#ifdef ISPC_IS_WINDOWS
int seed = (unsigned)time(NULL);
#else
int seed = getpid();
#endif
g->fuzzTestSeed = seed;
Warning(SourcePos(), "Using seed %d for fuzz testing",
g->fuzzTestSeed);
}
#ifdef ISPC_IS_WINDOWS
srand(g->fuzzTestSeed);
#else
srand48(g->fuzzTestSeed);
#endif
}
if (outFileName == NULL &&
headerFileName == NULL &&
depsFileName == NULL &&
hostStubFileName == NULL &&
devStubFileName == NULL)
Warning(SourcePos(), "No output file or header file name specified. "
"Program will be compiled and warnings/errors will "
"be issued, but no output will be generated.");
return Module::CompileAndOutput(file, arch, cpu, target, generatePIC,
ot,
outFileName,
headerFileName,
includeFileName,
depsFileName,
hostStubFileName,
devStubFileName);
}