1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/shark/sharkBuilder.cpp Wed Aug 11 05:51:21 2010 -0700
1.3 @@ -0,0 +1,591 @@
1.4 +/*
1.5 + * Copyright (c) 1999, 2007, Oracle and/or its affiliates. All rights reserved.
1.6 + * Copyright 2008, 2009, 2010 Red Hat, Inc.
1.7 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.8 + *
1.9 + * This code is free software; you can redistribute it and/or modify it
1.10 + * under the terms of the GNU General Public License version 2 only, as
1.11 + * published by the Free Software Foundation.
1.12 + *
1.13 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.14 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.15 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.16 + * version 2 for more details (a copy is included in the LICENSE file that
1.17 + * accompanied this code).
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License version
1.20 + * 2 along with this work; if not, write to the Free Software Foundation,
1.21 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.22 + *
1.23 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.24 + * or visit www.oracle.com if you need additional information or have any
1.25 + * questions.
1.26 + *
1.27 + */
1.28 +
1.29 +#include "incls/_precompiled.incl"
1.30 +#include "incls/_sharkBuilder.cpp.incl"
1.31 +
1.32 +using namespace llvm;
1.33 +
1.34 +SharkBuilder::SharkBuilder(SharkCodeBuffer* code_buffer)
1.35 + : IRBuilder<>(SharkContext::current()),
1.36 + _code_buffer(code_buffer) {
1.37 +}
1.38 +
1.39 +// Helpers for accessing structures
1.40 +Value* SharkBuilder::CreateAddressOfStructEntry(Value* base,
1.41 + ByteSize offset,
1.42 + const Type* type,
1.43 + const char* name) {
1.44 + return CreateBitCast(CreateStructGEP(base, in_bytes(offset)), type, name);
1.45 +}
1.46 +
1.47 +LoadInst* SharkBuilder::CreateValueOfStructEntry(Value* base,
1.48 + ByteSize offset,
1.49 + const Type* type,
1.50 + const char* name) {
1.51 + return CreateLoad(
1.52 + CreateAddressOfStructEntry(
1.53 + base, offset, PointerType::getUnqual(type)),
1.54 + name);
1.55 +}
1.56 +
1.57 +// Helpers for accessing arrays
1.58 +
1.59 +LoadInst* SharkBuilder::CreateArrayLength(Value* arrayoop) {
1.60 + return CreateValueOfStructEntry(
1.61 + arrayoop, in_ByteSize(arrayOopDesc::length_offset_in_bytes()),
1.62 + SharkType::jint_type(), "length");
1.63 +}
1.64 +
1.65 +Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
1.66 + const Type* element_type,
1.67 + int element_bytes,
1.68 + ByteSize base_offset,
1.69 + Value* index,
1.70 + const char* name) {
1.71 + Value* offset = CreateIntCast(index, SharkType::intptr_type(), false);
1.72 + if (element_bytes != 1)
1.73 + offset = CreateShl(
1.74 + offset,
1.75 + LLVMValue::intptr_constant(exact_log2(element_bytes)));
1.76 + offset = CreateAdd(
1.77 + LLVMValue::intptr_constant(in_bytes(base_offset)), offset);
1.78 +
1.79 + return CreateIntToPtr(
1.80 + CreateAdd(CreatePtrToInt(arrayoop, SharkType::intptr_type()), offset),
1.81 + PointerType::getUnqual(element_type),
1.82 + name);
1.83 +}
1.84 +
1.85 +Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
1.86 + BasicType basic_type,
1.87 + ByteSize base_offset,
1.88 + Value* index,
1.89 + const char* name) {
1.90 + return CreateArrayAddress(
1.91 + arrayoop,
1.92 + SharkType::to_arrayType(basic_type),
1.93 + type2aelembytes(basic_type),
1.94 + base_offset, index, name);
1.95 +}
1.96 +
1.97 +Value* SharkBuilder::CreateArrayAddress(Value* arrayoop,
1.98 + BasicType basic_type,
1.99 + Value* index,
1.100 + const char* name) {
1.101 + return CreateArrayAddress(
1.102 + arrayoop, basic_type,
1.103 + in_ByteSize(arrayOopDesc::base_offset_in_bytes(basic_type)),
1.104 + index, name);
1.105 +}
1.106 +
1.107 +// Helpers for creating intrinsics and external functions.
1.108 +
1.109 +const Type* SharkBuilder::make_type(char type, bool void_ok) {
1.110 + switch (type) {
1.111 + // Primitive types
1.112 + case 'c':
1.113 + return SharkType::jbyte_type();
1.114 + case 'i':
1.115 + return SharkType::jint_type();
1.116 + case 'l':
1.117 + return SharkType::jlong_type();
1.118 + case 'x':
1.119 + return SharkType::intptr_type();
1.120 + case 'f':
1.121 + return SharkType::jfloat_type();
1.122 + case 'd':
1.123 + return SharkType::jdouble_type();
1.124 +
1.125 + // Pointers to primitive types
1.126 + case 'C':
1.127 + case 'I':
1.128 + case 'L':
1.129 + case 'X':
1.130 + case 'F':
1.131 + case 'D':
1.132 + return PointerType::getUnqual(make_type(tolower(type), false));
1.133 +
1.134 + // VM objects
1.135 + case 'T':
1.136 + return SharkType::thread_type();
1.137 + case 'M':
1.138 + return PointerType::getUnqual(SharkType::monitor_type());
1.139 + case 'O':
1.140 + return SharkType::oop_type();
1.141 +
1.142 + // Miscellaneous
1.143 + case 'v':
1.144 + assert(void_ok, "should be");
1.145 + return SharkType::void_type();
1.146 + case '1':
1.147 + return SharkType::bit_type();
1.148 +
1.149 + default:
1.150 + ShouldNotReachHere();
1.151 + }
1.152 +}
1.153 +
1.154 +const FunctionType* SharkBuilder::make_ftype(const char* params,
1.155 + const char* ret) {
1.156 + std::vector<const Type*> param_types;
1.157 + for (const char* c = params; *c; c++)
1.158 + param_types.push_back(make_type(*c, false));
1.159 +
1.160 + assert(strlen(ret) == 1, "should be");
1.161 + const Type *return_type = make_type(*ret, true);
1.162 +
1.163 + return FunctionType::get(return_type, param_types, false);
1.164 +}
1.165 +
1.166 +// Create an object representing an intrinsic or external function by
1.167 +// referencing the symbol by name. This is the LLVM-style approach,
1.168 +// but it cannot be used on functions within libjvm.so its symbols
1.169 +// are not exported. Note that you cannot make this work simply by
1.170 +// exporting the symbols, as some symbols have the same names as
1.171 +// symbols in the standard libraries (eg, atan2, fabs) and would
1.172 +// obscure them were they visible.
1.173 +Value* SharkBuilder::make_function(const char* name,
1.174 + const char* params,
1.175 + const char* ret) {
1.176 + return SharkContext::current().get_external(name, make_ftype(params, ret));
1.177 +}
1.178 +
1.179 +// Create an object representing an external function by inlining a
1.180 +// function pointer in the code. This is not the LLVM way, but it's
1.181 +// the only way to access functions in libjvm.so and functions like
1.182 +// __kernel_dmb on ARM which is accessed via an absolute address.
1.183 +Value* SharkBuilder::make_function(address func,
1.184 + const char* params,
1.185 + const char* ret) {
1.186 + return CreateIntToPtr(
1.187 + LLVMValue::intptr_constant((intptr_t) func),
1.188 + PointerType::getUnqual(make_ftype(params, ret)));
1.189 +}
1.190 +
1.191 +// VM calls
1.192 +
1.193 +Value* SharkBuilder::find_exception_handler() {
1.194 + return make_function(
1.195 + (address) SharkRuntime::find_exception_handler, "TIi", "i");
1.196 +}
1.197 +
1.198 +Value* SharkBuilder::monitorenter() {
1.199 + return make_function((address) SharkRuntime::monitorenter, "TM", "v");
1.200 +}
1.201 +
1.202 +Value* SharkBuilder::monitorexit() {
1.203 + return make_function((address) SharkRuntime::monitorexit, "TM", "v");
1.204 +}
1.205 +
1.206 +Value* SharkBuilder::new_instance() {
1.207 + return make_function((address) SharkRuntime::new_instance, "Ti", "v");
1.208 +}
1.209 +
1.210 +Value* SharkBuilder::newarray() {
1.211 + return make_function((address) SharkRuntime::newarray, "Tii", "v");
1.212 +}
1.213 +
1.214 +Value* SharkBuilder::anewarray() {
1.215 + return make_function((address) SharkRuntime::anewarray, "Tii", "v");
1.216 +}
1.217 +
1.218 +Value* SharkBuilder::multianewarray() {
1.219 + return make_function((address) SharkRuntime::multianewarray, "TiiI", "v");
1.220 +}
1.221 +
1.222 +Value* SharkBuilder::register_finalizer() {
1.223 + return make_function((address) SharkRuntime::register_finalizer, "TO", "v");
1.224 +}
1.225 +
1.226 +Value* SharkBuilder::safepoint() {
1.227 + return make_function((address) SafepointSynchronize::block, "T", "v");
1.228 +}
1.229 +
1.230 +Value* SharkBuilder::throw_ArithmeticException() {
1.231 + return make_function(
1.232 + (address) SharkRuntime::throw_ArithmeticException, "TCi", "v");
1.233 +}
1.234 +
1.235 +Value* SharkBuilder::throw_ArrayIndexOutOfBoundsException() {
1.236 + return make_function(
1.237 + (address) SharkRuntime::throw_ArrayIndexOutOfBoundsException, "TCii", "v");
1.238 +}
1.239 +
1.240 +Value* SharkBuilder::throw_ClassCastException() {
1.241 + return make_function(
1.242 + (address) SharkRuntime::throw_ClassCastException, "TCi", "v");
1.243 +}
1.244 +
1.245 +Value* SharkBuilder::throw_NullPointerException() {
1.246 + return make_function(
1.247 + (address) SharkRuntime::throw_NullPointerException, "TCi", "v");
1.248 +}
1.249 +
1.250 +// High-level non-VM calls
1.251 +
1.252 +Value* SharkBuilder::f2i() {
1.253 + return make_function((address) SharedRuntime::f2i, "f", "i");
1.254 +}
1.255 +
1.256 +Value* SharkBuilder::f2l() {
1.257 + return make_function((address) SharedRuntime::f2l, "f", "l");
1.258 +}
1.259 +
1.260 +Value* SharkBuilder::d2i() {
1.261 + return make_function((address) SharedRuntime::d2i, "d", "i");
1.262 +}
1.263 +
1.264 +Value* SharkBuilder::d2l() {
1.265 + return make_function((address) SharedRuntime::d2l, "d", "l");
1.266 +}
1.267 +
1.268 +Value* SharkBuilder::is_subtype_of() {
1.269 + return make_function((address) SharkRuntime::is_subtype_of, "OO", "c");
1.270 +}
1.271 +
1.272 +Value* SharkBuilder::current_time_millis() {
1.273 + return make_function((address) os::javaTimeMillis, "", "l");
1.274 +}
1.275 +
1.276 +Value* SharkBuilder::sin() {
1.277 + return make_function("llvm.sin.f64", "d", "d");
1.278 +}
1.279 +
1.280 +Value* SharkBuilder::cos() {
1.281 + return make_function("llvm.cos.f64", "d", "d");
1.282 +}
1.283 +
1.284 +Value* SharkBuilder::tan() {
1.285 + return make_function((address) ::tan, "d", "d");
1.286 +}
1.287 +
1.288 +Value* SharkBuilder::atan2() {
1.289 + return make_function((address) ::atan2, "dd", "d");
1.290 +}
1.291 +
1.292 +Value* SharkBuilder::sqrt() {
1.293 + return make_function("llvm.sqrt.f64", "d", "d");
1.294 +}
1.295 +
1.296 +Value* SharkBuilder::log() {
1.297 + return make_function("llvm.log.f64", "d", "d");
1.298 +}
1.299 +
1.300 +Value* SharkBuilder::log10() {
1.301 + return make_function("llvm.log10.f64", "d", "d");
1.302 +}
1.303 +
1.304 +Value* SharkBuilder::pow() {
1.305 + return make_function("llvm.pow.f64", "dd", "d");
1.306 +}
1.307 +
1.308 +Value* SharkBuilder::exp() {
1.309 + return make_function("llvm.exp.f64", "d", "d");
1.310 +}
1.311 +
1.312 +Value* SharkBuilder::fabs() {
1.313 + return make_function((address) ::fabs, "d", "d");
1.314 +}
1.315 +
1.316 +Value* SharkBuilder::unsafe_field_offset_to_byte_offset() {
1.317 + extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset);
1.318 + return make_function((address) Unsafe_field_offset_to_byte_offset, "l", "l");
1.319 +}
1.320 +
1.321 +Value* SharkBuilder::osr_migration_end() {
1.322 + return make_function((address) SharedRuntime::OSR_migration_end, "C", "v");
1.323 +}
1.324 +
1.325 +// Semi-VM calls
1.326 +
1.327 +Value* SharkBuilder::throw_StackOverflowError() {
1.328 + return make_function((address) ZeroStack::handle_overflow, "T", "v");
1.329 +}
1.330 +
1.331 +Value* SharkBuilder::uncommon_trap() {
1.332 + return make_function((address) SharkRuntime::uncommon_trap, "Ti", "i");
1.333 +}
1.334 +
1.335 +Value* SharkBuilder::deoptimized_entry_point() {
1.336 + return make_function((address) CppInterpreter::main_loop, "iT", "v");
1.337 +}
1.338 +
1.339 +// Native-Java transition
1.340 +
1.341 +Value* SharkBuilder::check_special_condition_for_native_trans() {
1.342 + return make_function(
1.343 + (address) JavaThread::check_special_condition_for_native_trans,
1.344 + "T", "v");
1.345 +}
1.346 +
1.347 +// Low-level non-VM calls
1.348 +
1.349 +// The ARM-specific code here is to work around unimplemented
1.350 +// atomic exchange and memory barrier intrinsics in LLVM.
1.351 +//
1.352 +// Delegating to external functions for these would normally
1.353 +// incur a speed penalty, but Linux on ARM is a special case
1.354 +// in that atomic operations on that platform are handled by
1.355 +// external functions anyway. It would be *preferable* for
1.356 +// the calls to be hidden away in LLVM, but it's not hurting
1.357 +// performance so having the calls here is acceptable.
1.358 +//
1.359 +// If you are building Shark on a platform without atomic
1.360 +// exchange and/or memory barrier intrinsics then it is only
1.361 +// acceptable to mimic this approach if your platform cannot
1.362 +// perform these operations without delegating to a function.
1.363 +
1.364 +#ifdef ARM
1.365 +static jint zero_cmpxchg_int(volatile jint *ptr, jint oldval, jint newval) {
1.366 + return Atomic::cmpxchg(newval, ptr, oldval);
1.367 +}
1.368 +#endif // ARM
1.369 +
1.370 +Value* SharkBuilder::cmpxchg_int() {
1.371 + return make_function(
1.372 +#ifdef ARM
1.373 + (address) zero_cmpxchg_int,
1.374 +#else
1.375 + "llvm.atomic.cmp.swap.i32.p0i32",
1.376 +#endif // ARM
1.377 + "Iii", "i");
1.378 +}
1.379 +
1.380 +#ifdef ARM
1.381 +static intptr_t zero_cmpxchg_ptr(volatile intptr_t* ptr,
1.382 + intptr_t oldval,
1.383 + intptr_t newval) {
1.384 + return Atomic::cmpxchg_ptr(newval, ptr, oldval);
1.385 +}
1.386 +#endif // ARM
1.387 +
1.388 +Value* SharkBuilder::cmpxchg_ptr() {
1.389 + return make_function(
1.390 +#ifdef ARM
1.391 + (address) zero_cmpxchg_ptr,
1.392 +#else
1.393 + "llvm.atomic.cmp.swap.i" LP64_ONLY("64") NOT_LP64("32") ".p0i" LP64_ONLY("64") NOT_LP64("32"),
1.394 +#endif // ARM
1.395 + "Xxx", "x");
1.396 +}
1.397 +
1.398 +Value* SharkBuilder::frame_address() {
1.399 + return make_function("llvm.frameaddress", "i", "C");
1.400 +}
1.401 +
1.402 +Value* SharkBuilder::memory_barrier() {
1.403 + return make_function(
1.404 +#ifdef ARM
1.405 + (address) 0xffff0fa0, // __kernel_dmb
1.406 +#else
1.407 + "llvm.memory.barrier",
1.408 +#endif // ARM
1.409 + "11111", "v");
1.410 +}
1.411 +
1.412 +Value* SharkBuilder::memset() {
1.413 +#if SHARK_LLVM_VERSION >= 28
1.414 + // LLVM 2.8 added a fifth isVolatile field for memset
1.415 + // introduced with LLVM r100304
1.416 + return make_function("llvm.memset.i32", "Cciii", "v");
1.417 +#else
1.418 + return make_function("llvm.memset.i32", "Ccii", "v");
1.419 +#endif
1.420 +}
1.421 +
1.422 +Value* SharkBuilder::unimplemented() {
1.423 + return make_function((address) report_unimplemented, "Ci", "v");
1.424 +}
1.425 +
1.426 +Value* SharkBuilder::should_not_reach_here() {
1.427 + return make_function((address) report_should_not_reach_here, "Ci", "v");
1.428 +}
1.429 +
1.430 +Value* SharkBuilder::dump() {
1.431 + return make_function((address) SharkRuntime::dump, "Cx", "v");
1.432 +}
1.433 +
1.434 +// Public interface to low-level non-VM calls
1.435 +
1.436 +CallInst* SharkBuilder::CreateCmpxchgInt(Value* exchange_value,
1.437 + Value* dst,
1.438 + Value* compare_value) {
1.439 + return CreateCall3(cmpxchg_int(), dst, compare_value, exchange_value);
1.440 +}
1.441 +
1.442 +CallInst* SharkBuilder::CreateCmpxchgPtr(Value* exchange_value,
1.443 + Value* dst,
1.444 + Value* compare_value) {
1.445 + return CreateCall3(cmpxchg_ptr(), dst, compare_value, exchange_value);
1.446 +}
1.447 +
1.448 +CallInst* SharkBuilder::CreateGetFrameAddress() {
1.449 + return CreateCall(frame_address(), LLVMValue::jint_constant(0));
1.450 +}
1.451 +
1.452 +CallInst *SharkBuilder::CreateMemoryBarrier(int flags) {
1.453 + Value *args[] = {
1.454 + LLVMValue::bit_constant((flags & BARRIER_LOADLOAD) ? 1 : 0),
1.455 + LLVMValue::bit_constant((flags & BARRIER_LOADSTORE) ? 1 : 0),
1.456 + LLVMValue::bit_constant((flags & BARRIER_STORELOAD) ? 1 : 0),
1.457 + LLVMValue::bit_constant((flags & BARRIER_STORESTORE) ? 1 : 0),
1.458 + LLVMValue::bit_constant(1)};
1.459 +
1.460 + return CreateCall(memory_barrier(), args, args + 5);
1.461 +}
1.462 +
1.463 +CallInst* SharkBuilder::CreateMemset(Value* dst,
1.464 + Value* value,
1.465 + Value* len,
1.466 + Value* align) {
1.467 +#if SHARK_LLVM_VERSION >= 28
1.468 + return CreateCall5(memset(), dst, value, len, align,
1.469 + LLVMValue::jint_constant(0));
1.470 +#else
1.471 + return CreateCall4(memset(), dst, value, len, align);
1.472 +#endif
1.473 +}
1.474 +
1.475 +CallInst* SharkBuilder::CreateUnimplemented(const char* file, int line) {
1.476 + return CreateCall2(
1.477 + unimplemented(),
1.478 + CreateIntToPtr(
1.479 + LLVMValue::intptr_constant((intptr_t) file),
1.480 + PointerType::getUnqual(SharkType::jbyte_type())),
1.481 + LLVMValue::jint_constant(line));
1.482 +}
1.483 +
1.484 +CallInst* SharkBuilder::CreateShouldNotReachHere(const char* file, int line) {
1.485 + return CreateCall2(
1.486 + should_not_reach_here(),
1.487 + CreateIntToPtr(
1.488 + LLVMValue::intptr_constant((intptr_t) file),
1.489 + PointerType::getUnqual(SharkType::jbyte_type())),
1.490 + LLVMValue::jint_constant(line));
1.491 +}
1.492 +
1.493 +#ifndef PRODUCT
1.494 +CallInst* SharkBuilder::CreateDump(Value* value) {
1.495 + const char *name;
1.496 + if (value->hasName())
1.497 + // XXX this leaks, but it's only debug code
1.498 + name = strdup(value->getName().str().c_str());
1.499 + else
1.500 + name = "unnamed_value";
1.501 +
1.502 + if (isa<PointerType>(value->getType()))
1.503 + value = CreatePtrToInt(value, SharkType::intptr_type());
1.504 + else if (value->getType()->
1.505 +#if SHARK_LLVM_VERSION >= 27
1.506 + isIntegerTy()
1.507 +#else
1.508 + isInteger()
1.509 +#endif
1.510 + )
1.511 + value = CreateIntCast(value, SharkType::intptr_type(), false);
1.512 + else
1.513 + Unimplemented();
1.514 +
1.515 + return CreateCall2(
1.516 + dump(),
1.517 + CreateIntToPtr(
1.518 + LLVMValue::intptr_constant((intptr_t) name),
1.519 + PointerType::getUnqual(SharkType::jbyte_type())),
1.520 + value);
1.521 +}
1.522 +#endif // PRODUCT
1.523 +
1.524 +// HotSpot memory barriers
1.525 +
1.526 +void SharkBuilder::CreateUpdateBarrierSet(BarrierSet* bs, Value* field) {
1.527 + if (bs->kind() != BarrierSet::CardTableModRef)
1.528 + Unimplemented();
1.529 +
1.530 + CreateStore(
1.531 + LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card),
1.532 + CreateIntToPtr(
1.533 + CreateAdd(
1.534 + LLVMValue::intptr_constant(
1.535 + (intptr_t) ((CardTableModRefBS *) bs)->byte_map_base),
1.536 + CreateLShr(
1.537 + CreatePtrToInt(field, SharkType::intptr_type()),
1.538 + LLVMValue::intptr_constant(CardTableModRefBS::card_shift))),
1.539 + PointerType::getUnqual(SharkType::jbyte_type())));
1.540 +}
1.541 +
1.542 +// Helpers for accessing the code buffer
1.543 +
1.544 +Value* SharkBuilder::code_buffer_address(int offset) {
1.545 + return CreateAdd(
1.546 + code_buffer()->base_pc(),
1.547 + LLVMValue::intptr_constant(offset));
1.548 +}
1.549 +
1.550 +Value* SharkBuilder::CreateInlineOop(jobject object, const char* name) {
1.551 + return CreateLoad(
1.552 + CreateIntToPtr(
1.553 + code_buffer_address(code_buffer()->inline_oop(object)),
1.554 + PointerType::getUnqual(SharkType::oop_type())),
1.555 + name);
1.556 +}
1.557 +
1.558 +Value* SharkBuilder::CreateInlineData(void* data,
1.559 + size_t size,
1.560 + const Type* type,
1.561 + const char* name) {
1.562 + return CreateIntToPtr(
1.563 + code_buffer_address(code_buffer()->inline_data(data, size)),
1.564 + type,
1.565 + name);
1.566 +}
1.567 +
1.568 +// Helpers for creating basic blocks.
1.569 +
1.570 +BasicBlock* SharkBuilder::GetBlockInsertionPoint() const {
1.571 + BasicBlock *cur = GetInsertBlock();
1.572 +
1.573 + // BasicBlock::Create takes an insertBefore argument, so
1.574 + // we need to find the block _after_ the current block
1.575 + Function::iterator iter = cur->getParent()->begin();
1.576 + Function::iterator end = cur->getParent()->end();
1.577 + while (iter != end) {
1.578 + iter++;
1.579 + if (&*iter == cur) {
1.580 + iter++;
1.581 + break;
1.582 + }
1.583 + }
1.584 +
1.585 + if (iter == end)
1.586 + return NULL;
1.587 + else
1.588 + return iter;
1.589 +}
1.590 +
1.591 +BasicBlock* SharkBuilder::CreateBlock(BasicBlock* ip, const char* name) const {
1.592 + return BasicBlock::Create(
1.593 + SharkContext::current(), name, GetInsertBlock()->getParent(), ip);
1.594 +}
