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v1.13.0
src/builtins.cpp
1 010 строк
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Deepak
Fix for #1659 - adding bool implementation for insert and extract
17 апр 2020, 00:55
17 апр 2020, 00:55
c7340b5
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/* Copyright (c) 2010-2020, Intel Corporation All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of Intel Corporation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @file builtins.cpp @brief Definitions of functions related to setting up the standard library and other builtins. */ #include "builtins.h" #include "ctx.h" #include "expr.h" #include "llvmutil.h" #include "module.h" #include "sym.h" #include "type.h" #include "util.h" #include <math.h> #include <stdlib.h> #include <llvm/ADT/Triple.h> #include <llvm/Bitcode/BitcodeReader.h> #include <llvm/IR/Attributes.h> #include <llvm/IR/DerivedTypes.h> #include <llvm/IR/Instructions.h> #include <llvm/IR/Intrinsics.h> #include <llvm/IR/LLVMContext.h> #include <llvm/IR/Module.h> #include <llvm/IR/Type.h> #include <llvm/Linker/Linker.h> #include <llvm/Support/MemoryBuffer.h> #include <llvm/Target/TargetMachine.h> extern int yyparse(); struct yy_buffer_state; extern yy_buffer_state *yy_scan_string(const char *); /** Given an LLVM type, try to find the equivalent ispc type. Note that this is an under-constrained problem due to LLVM's type representations carrying less information than ispc's. (For example, LLVM doesn't distinguish between signed and unsigned integers in its types.) Because this function is only used for generating ispc declarations of functions defined in LLVM bitcode in the builtins-*.ll files, in practice we can get enough of what we need for the relevant cases to make things work, partially with the help of the intAsUnsigned parameter, which indicates whether LLVM integer types should be treated as being signed or unsigned. */ static const Type *lLLVMTypeToISPCType(const llvm::Type *t, bool intAsUnsigned) { if (t == LLVMTypes::VoidType) return AtomicType::Void; // uniform else if (t == LLVMTypes::BoolType) return AtomicType::UniformBool; else if (t == LLVMTypes::Int8Type) return intAsUnsigned ? AtomicType::UniformUInt8 : AtomicType::UniformInt8; else if (t == LLVMTypes::Int16Type) return intAsUnsigned ? AtomicType::UniformUInt16 : AtomicType::UniformInt16; else if (t == LLVMTypes::Int32Type) return intAsUnsigned ? AtomicType::UniformUInt32 : AtomicType::UniformInt32; else if (t == LLVMTypes::FloatType) return AtomicType::UniformFloat; else if (t == LLVMTypes::DoubleType) return AtomicType::UniformDouble; else if (t == LLVMTypes::Int64Type) return intAsUnsigned ? AtomicType::UniformUInt64 : AtomicType::UniformInt64; // varying if (t == LLVMTypes::Int8VectorType) return intAsUnsigned ? AtomicType::VaryingUInt8 : AtomicType::VaryingInt8; else if (t == LLVMTypes::Int16VectorType) return intAsUnsigned ? AtomicType::VaryingUInt16 : AtomicType::VaryingInt16; else if (t == LLVMTypes::Int32VectorType) return intAsUnsigned ? AtomicType::VaryingUInt32 : AtomicType::VaryingInt32; else if (t == LLVMTypes::FloatVectorType) return AtomicType::VaryingFloat; else if (t == LLVMTypes::DoubleVectorType) return AtomicType::VaryingDouble; else if (t == LLVMTypes::Int64VectorType) return intAsUnsigned ? AtomicType::VaryingUInt64 : AtomicType::VaryingInt64; else if (t == LLVMTypes::MaskType) return AtomicType::VaryingBool; // pointers to uniform else if (t == LLVMTypes::Int8PointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::UniformUInt8 : AtomicType::UniformInt8); else if (t == LLVMTypes::Int16PointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::UniformUInt16 : AtomicType::UniformInt16); else if (t == LLVMTypes::Int32PointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::UniformUInt32 : AtomicType::UniformInt32); else if (t == LLVMTypes::Int64PointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::UniformUInt64 : AtomicType::UniformInt64); else if (t == LLVMTypes::FloatPointerType) return PointerType::GetUniform(AtomicType::UniformFloat); else if (t == LLVMTypes::DoublePointerType) return PointerType::GetUniform(AtomicType::UniformDouble); // pointers to varying else if (t == LLVMTypes::Int8VectorPointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::VaryingUInt8 : AtomicType::VaryingInt8); else if (t == LLVMTypes::Int16VectorPointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::VaryingUInt16 : AtomicType::VaryingInt16); else if (t == LLVMTypes::Int32VectorPointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::VaryingUInt32 : AtomicType::VaryingInt32); else if (t == LLVMTypes::Int64VectorPointerType) return PointerType::GetUniform(intAsUnsigned ? AtomicType::VaryingUInt64 : AtomicType::VaryingInt64); else if (t == LLVMTypes::FloatVectorPointerType) return PointerType::GetUniform(AtomicType::VaryingFloat); else if (t == LLVMTypes::DoubleVectorPointerType) return PointerType::GetUniform(AtomicType::VaryingDouble); return NULL; } static void lCreateSymbol(const std::string &name, const Type *returnType, llvm::SmallVector<const Type *, 8> &argTypes, const llvm::FunctionType *ftype, llvm::Function *func, SymbolTable *symbolTable) { SourcePos noPos; noPos.name = "__stdlib"; FunctionType *funcType = new FunctionType(returnType, argTypes, noPos); Debug(noPos, "Created builtin symbol \"%s\" [%s]\n", name.c_str(), funcType->GetString().c_str()); Symbol *sym = new Symbol(name, noPos, funcType); sym->function = func; symbolTable->AddFunction(sym); } /** Given an LLVM function declaration, synthesize the equivalent ispc symbol for the function (if possible). Returns true on success, false on failure. */ static bool lCreateISPCSymbol(llvm::Function *func, SymbolTable *symbolTable) { SourcePos noPos; noPos.name = "__stdlib"; const llvm::FunctionType *ftype = func->getFunctionType(); std::string name = std::string(func->getName()); if (name.size() < 3 || name[0] != '_' || name[1] != '_') return false; Debug(SourcePos(), "Attempting to create ispc symbol for function \"%s\".", name.c_str()); // An unfortunate hack: we want this builtin function to have the // signature "int __sext_varying_bool(bool)", but the ispc function // symbol creation code below assumes that any LLVM vector of i32s is a // varying int32. Here, we need that to be interpreted as a varying // bool, so just have a one-off override for that one... if (g->target->getMaskBitCount() != 1 && name == "__sext_varying_bool") { const Type *returnType = AtomicType::VaryingInt32; llvm::SmallVector<const Type *, 8> argTypes; argTypes.push_back(AtomicType::VaryingBool); FunctionType *funcType = new FunctionType(returnType, argTypes, noPos); Symbol *sym = new Symbol(name, noPos, funcType); sym->function = func; symbolTable->AddFunction(sym); return true; } // If the function has any parameters with integer types, we'll make // two Symbols for two overloaded versions of the function, one with // all of the integer types treated as signed integers and one with all // of them treated as unsigned. for (int i = 0; i < 2; ++i) { bool intAsUnsigned = (i == 1); const Type *returnType = lLLVMTypeToISPCType(ftype->getReturnType(), intAsUnsigned); if (returnType == NULL) { Debug(SourcePos(), "Failed: return type not representable for " "builtin %s.", name.c_str()); // return type not representable in ispc -> not callable from ispc return false; } // Iterate over the arguments and try to find their equivalent ispc // types. Track if any of the arguments has an integer type. bool anyIntArgs = false; llvm::SmallVector<const Type *, 8> argTypes; for (unsigned int j = 0; j < ftype->getNumParams(); ++j) { const llvm::Type *llvmArgType = ftype->getParamType(j); const Type *type = lLLVMTypeToISPCType(llvmArgType, intAsUnsigned); if (type == NULL) { Debug(SourcePos(), "Failed: type of parameter %d not " "representable for builtin %s", j, name.c_str()); return false; } anyIntArgs |= (Type::Equal(type, lLLVMTypeToISPCType(llvmArgType, !intAsUnsigned)) == false); argTypes.push_back(type); } // Always create the symbol the first time through, in particular // so that we get symbols for things with no integer types! if (i == 0 || anyIntArgs == true) lCreateSymbol(name, returnType, argTypes, ftype, func, symbolTable); } return true; } /** Given an LLVM module, create ispc symbols for the functions in the module. */ static void lAddModuleSymbols(llvm::Module *module, SymbolTable *symbolTable) { #if 0 // FIXME: handle globals? Assert(module->global_empty()); #endif llvm::Module::iterator iter; for (iter = module->begin(); iter != module->end(); ++iter) { llvm::Function *func = &*iter; lCreateISPCSymbol(func, symbolTable); } } /** In many of the builtins-*.ll files, we have declarations of various LLVM intrinsics that are then used in the implementation of various target- specific functions. This function loops over all of the intrinsic declarations and makes sure that the signature we have in our .ll file matches the signature of the actual intrinsic. */ static void lCheckModuleIntrinsics(llvm::Module *module) { llvm::Module::iterator iter; for (iter = module->begin(); iter != module->end(); ++iter) { llvm::Function *func = &*iter; if (!func->isIntrinsic()) continue; const std::string funcName = func->getName().str(); // Work around http://llvm.org/bugs/show_bug.cgi?id=10438; only // check the llvm.x86.* intrinsics for now... if (!strncmp(funcName.c_str(), "llvm.x86.", 9)) { llvm::Intrinsic::ID id = (llvm::Intrinsic::ID)func->getIntrinsicID(); if (id == 0) { std::string error_message = "Intrinsic is not found: "; error_message += funcName; FATAL(error_message.c_str()); } llvm::Type *intrinsicType = llvm::Intrinsic::getType(*g->ctx, id); intrinsicType = llvm::PointerType::get(intrinsicType, 0); Assert(func->getType() == intrinsicType); } } } /** We'd like to have all of these functions declared as 'internal' in their respective bitcode files so that if they aren't needed by the user's program they are elimiated from the final output. However, if we do so, then they aren't brought in by the LinkModules() call below since they aren't yet used by anything in the module they're being linked with (in LLVM 3.1, at least). Therefore, we don't declare them as internal when we first define them, but instead mark them as internal after they've been linked in. This is admittedly a kludge. */ static void lSetInternalFunctions(llvm::Module *module) { // clang-format off const char *names[] = { "__add_float", "__add_int32", "__add_uniform_double", "__add_uniform_int32", "__add_uniform_int64", "__add_varying_double", "__add_varying_int32", "__add_varying_int64", "__all", "__any", "__aos_to_soa3_double", "__aos_to_soa3_double1", "__aos_to_soa3_double16", "__aos_to_soa3_double32", "__aos_to_soa3_double4", "__aos_to_soa3_double64", "__aos_to_soa3_double8", "__aos_to_soa3_float", "__aos_to_soa3_float1", "__aos_to_soa3_float16", "__aos_to_soa3_float32", "__aos_to_soa3_float4", "__aos_to_soa3_float64", "__aos_to_soa3_float8", "__aos_to_soa4_double", "__aos_to_soa4_double1", "__aos_to_soa4_double16", "__aos_to_soa4_double32", "__aos_to_soa4_double4", "__aos_to_soa4_double64", "__aos_to_soa4_double8", "__aos_to_soa4_float", "__aos_to_soa4_float1", "__aos_to_soa4_float16", "__aos_to_soa4_float32", "__aos_to_soa4_float4", "__aos_to_soa4_float64", "__aos_to_soa4_float8", "__atomic_add_int32_global", "__atomic_add_int64_global", "__atomic_add_uniform_int32_global", "__atomic_add_uniform_int64_global", "__atomic_and_int32_global", "__atomic_and_int64_global", "__atomic_and_uniform_int32_global", "__atomic_and_uniform_int64_global", "__atomic_compare_exchange_double_global", "__atomic_compare_exchange_float_global", "__atomic_compare_exchange_int32_global", "__atomic_compare_exchange_int64_global", "__atomic_compare_exchange_uniform_double_global", "__atomic_compare_exchange_uniform_float_global", "__atomic_compare_exchange_uniform_int32_global", "__atomic_compare_exchange_uniform_int64_global", "__atomic_max_uniform_int32_global", "__atomic_max_uniform_int64_global", "__atomic_min_uniform_int32_global", "__atomic_min_uniform_int64_global", "__atomic_or_int32_global", "__atomic_or_int64_global", "__atomic_or_uniform_int32_global", "__atomic_or_uniform_int64_global", "__atomic_sub_int32_global", "__atomic_sub_int64_global", "__atomic_sub_uniform_int32_global", "__atomic_sub_uniform_int64_global", "__atomic_swap_double_global", "__atomic_swap_float_global", "__atomic_swap_int32_global", "__atomic_swap_int64_global", "__atomic_swap_uniform_double_global", "__atomic_swap_uniform_float_global", "__atomic_swap_uniform_int32_global", "__atomic_swap_uniform_int64_global", "__atomic_umax_uniform_uint32_global", "__atomic_umax_uniform_uint64_global", "__atomic_umin_uniform_uint32_global", "__atomic_umin_uniform_uint64_global", "__atomic_xor_int32_global", "__atomic_xor_int64_global", "__atomic_xor_uniform_int32_global", "__atomic_xor_uniform_int64_global", "__broadcast_double", "__broadcast_float", "__broadcast_i16", "__broadcast_i32", "__broadcast_i64", "__broadcast_i8", "__cast_mask_to_i1", "__cast_mask_to_i8", "__cast_mask_to_i16", "__ceil_uniform_double", "__ceil_uniform_float", "__ceil_varying_double", "__ceil_varying_float", "__clock", "__count_trailing_zeros_i32", "__count_trailing_zeros_i64", "__count_leading_zeros_i32", "__count_leading_zeros_i64", "__delete_uniform_32rt", "__delete_uniform_64rt", "__delete_varying_32rt", "__delete_varying_64rt", "__do_assert_uniform", "__do_assert_varying", "__do_print", "__doublebits_uniform_int64", "__doublebits_varying_int64", "__exclusive_scan_add_double", "__exclusive_scan_add_float", "__exclusive_scan_add_i32", "__exclusive_scan_add_i64", "__exclusive_scan_and_i32", "__exclusive_scan_and_i64", "__exclusive_scan_or_i32", "__exclusive_scan_or_i64", "__extract_bool", "__extract_int16", "__extract_int32", "__extract_int64", "__extract_int8", "__extract_mask_low", "__extract_mask_hi", "__fastmath", "__float_to_half_uniform", "__float_to_half_varying", "__floatbits_uniform_int32", "__floatbits_varying_int32", "__floor_uniform_double", "__floor_uniform_float", "__floor_varying_double", "__floor_varying_float", "__get_system_isa", "__half_to_float_uniform", "__half_to_float_varying", "__insert_bool", "__insert_int16", "__insert_int32", "__insert_int64", "__insert_int8", "__intbits_uniform_double", "__intbits_uniform_float", "__intbits_varying_double", "__intbits_varying_float", "__max_uniform_double", "__max_uniform_float", "__max_uniform_int32", "__max_uniform_int64", "__max_uniform_uint32", "__max_uniform_uint64", "__max_varying_double", "__max_varying_float", "__max_varying_int32", "__max_varying_int64", "__max_varying_uint32", "__max_varying_uint64", "__memory_barrier", "__memcpy32", "__memcpy64", "__memmove32", "__memmove64", "__memset32", "__memset64", "__min_uniform_double", "__min_uniform_float", "__min_uniform_int32", "__min_uniform_int64", "__min_uniform_uint32", "__min_uniform_uint64", "__min_varying_double", "__min_varying_float", "__min_varying_int32", "__min_varying_int64", "__min_varying_uint32", "__min_varying_uint64", "__movmsk", "__new_uniform_32rt", "__new_uniform_64rt", "__new_varying32_32rt", "__new_varying32_64rt", "__new_varying64_64rt", "__none", "__num_cores", "__packed_load_active", "__packed_store_active", "__packed_store_active2", "__padds_vi8", "__padds_vi16", "__paddus_vi8", "__paddus_vi16", "__popcnt_int32", "__popcnt_int64", "__prefetch_read_uniform_1", "__prefetch_read_uniform_2", "__prefetch_read_uniform_3", "__prefetch_read_uniform_nt", "__pseudo_prefetch_read_varying_1", "__pseudo_prefetch_read_varying_2", "__pseudo_prefetch_read_varying_3", "__pseudo_prefetch_read_varying_nt", "__psubs_vi8", "__psubs_vi16", "__psubus_vi8", "__psubus_vi16", "__rcp_fast_uniform_float", "__rcp_uniform_float", "__rcp_fast_varying_float", "__rcp_varying_float", "__rcp_uniform_double", "__rcp_varying_double", "__rdrand_i16", "__rdrand_i32", "__rdrand_i64", "__reduce_add_double", "__reduce_add_float", "__reduce_add_int8", "__reduce_add_int16", "__reduce_add_int32", "__reduce_add_int64", "__reduce_equal_double", "__reduce_equal_float", "__reduce_equal_int32", "__reduce_equal_int64", "__reduce_max_double", "__reduce_max_float", "__reduce_max_int32", "__reduce_max_int64", "__reduce_max_uint32", "__reduce_max_uint64", "__reduce_min_double", "__reduce_min_float", "__reduce_min_int32", "__reduce_min_int64", "__reduce_min_uint32", "__reduce_min_uint64", "__rotate_double", "__rotate_float", "__rotate_i16", "__rotate_i32", "__rotate_i64", "__rotate_i8", "__round_uniform_double", "__round_uniform_float", "__round_varying_double", "__round_varying_float", "__rsqrt_fast_varying_float", "__rsqrt_uniform_float", "__rsqrt_fast_uniform_float", "__rsqrt_varying_float", "__rsqrt_uniform_double", "__rsqrt_varying_double", "__set_system_isa", "__sext_uniform_bool", "__sext_varying_bool", "__shift_double", "__shift_float", "__shift_i16", "__shift_i32", "__shift_i64", "__shift_i8", "__shuffle2_double", "__shuffle2_float", "__shuffle2_i16", "__shuffle2_i32", "__shuffle2_i64", "__shuffle2_i8", "__shuffle_double", "__shuffle_float", "__shuffle_i16", "__shuffle_i32", "__shuffle_i64", "__shuffle_i8", "__soa_to_aos3_double", "__soa_to_aos3_double1", "__soa_to_aos3_double16", "__soa_to_aos3_double32", "__soa_to_aos3_double4", "__soa_to_aos3_double64", "__soa_to_aos3_double8", "__soa_to_aos3_float", "__soa_to_aos3_float1", "__soa_to_aos3_float16", "__soa_to_aos3_float32", "__soa_to_aos3_float4", "__soa_to_aos3_float64", "__soa_to_aos3_float8", "__soa_to_aos4_double", "__soa_to_aos4_double1", "__soa_to_aos4_double16", "__soa_to_aos4_double32", "__soa_to_aos4_double4", "__soa_to_aos4_double64", "__soa_to_aos4_double8", "__soa_to_aos4_float", "__soa_to_aos4_float1", "__soa_to_aos4_float16", "__soa_to_aos4_float32", "__soa_to_aos4_float4", "__soa_to_aos4_float64", "__soa_to_aos4_float8", "__sqrt_uniform_double", "__sqrt_uniform_float", "__sqrt_varying_double", "__sqrt_varying_float", "__stdlib_acosf", "__stdlib_asinf", "__stdlib_atan", "__stdlib_atan2", "__stdlib_atan2f", "__stdlib_atanf", "__stdlib_cos", "__stdlib_cosf", "__stdlib_exp", "__stdlib_expf", "__stdlib_log", "__stdlib_logf", "__stdlib_pow", "__stdlib_powf", "__stdlib_sin", "__stdlib_asin", "__stdlib_sincos", "__stdlib_sincosf", "__stdlib_sinf", "__stdlib_tan", "__stdlib_tanf", "__streaming_load_uniform_double", "__streaming_load_uniform_float", "__streaming_load_uniform_i8", "__streaming_load_uniform_i16", "__streaming_load_uniform_i32", "__streaming_load_uniform_i64", "__streaming_load_varying_double", "__streaming_load_varying_float", "__streaming_load_varying_i8", "__streaming_load_varying_i16", "__streaming_load_varying_i32", "__streaming_load_varying_i64", "__streaming_store_uniform_double", "__streaming_store_uniform_float", "__streaming_store_uniform_i8", "__streaming_store_uniform_i16", "__streaming_store_uniform_i32", "__streaming_store_uniform_i64", "__streaming_store_varying_double", "__streaming_store_varying_float", "__streaming_store_varying_i8", "__streaming_store_varying_i16", "__streaming_store_varying_i32", "__streaming_store_varying_i64", "__svml_sind", "__svml_asind", "__svml_cosd", "__svml_acosd", "__svml_sincosd", "__svml_tand", "__svml_atand", "__svml_atan2d", "__svml_expd", "__svml_logd", "__svml_powd", "__svml_sinf", "__svml_asinf", "__svml_cosf", "__svml_acosf", "__svml_sincosf", "__svml_tanf", "__svml_atanf", "__svml_atan2f", "__svml_expf", "__svml_logf", "__svml_powf", "__log_uniform_float", "__log_varying_float", "__exp_uniform_float", "__exp_varying_float", "__pow_uniform_float", "__pow_varying_float", "__log_uniform_double", "__log_varying_double", "__exp_uniform_double", "__exp_varying_double", "__pow_uniform_double", "__pow_varying_double", "__sin_varying_float", "__asin_varying_float", "__cos_varying_float", "__acos_varying_float", "__sincos_varying_float", "__tan_varying_float", "__atan_varying_float", "__atan2_varying_float", "__sin_uniform_float", "__asin_uniform_float", "__cos_uniform_float", "__acos_uniform_float", "__sincos_uniform_float", "__tan_uniform_float", "__atan_uniform_float", "__atan2_uniform_float", "__sin_varying_double", "__asin_varying_double", "__cos_varying_double", "__acos_varying_double", "__sincos_varying_double", "__tan_varying_double", "__atan_varying_double", "__atan2_varying_double", "__sin_uniform_double", "__asin_uniform_double", "__cos_uniform_double", "__acos_uniform_double", "__sincos_uniform_double", "__tan_uniform_double", "__atan_uniform_double", "__atan2_uniform_double", "__undef_uniform", "__undef_varying", "__vec4_add_float", "__vec4_add_int32", "__vselect_float", "__vselect_i32", "ISPCAlloc", "ISPCLaunch", "ISPCSync" }; // clang-format on int count = sizeof(names) / sizeof(names[0]); for (int i = 0; i < count; ++i) { llvm::Function *f = module->getFunction(names[i]); if (f != NULL && f->empty() == false) { f->setLinkage(llvm::GlobalValue::InternalLinkage); // TO-DO : Revisit adding this back for ARM support. // g->target->markFuncWithTargetAttr(f); } } } /** This utility function takes serialized binary LLVM bitcode and adds its definitions to the given module. Functions in the bitcode that can be mapped to ispc functions are also added to the symbol table. @param lib Pointer to BitcodeLib class representing LLVM bitcode (e.g. the contents of a *.bc file) @param module Module to link the bitcode into @param symbolTable Symbol table to add definitions to */ void AddBitcodeToModule(const BitcodeLib *lib, llvm::Module *module, SymbolTable *symbolTable, bool warn) { llvm::StringRef sb = llvm::StringRef((const char *)lib->getLib(), lib->getSize()); llvm::MemoryBufferRef bcBuf = llvm::MemoryBuffer::getMemBuffer(sb)->getMemBufferRef(); llvm::Expected<std::unique_ptr<llvm::Module>> ModuleOrErr = llvm::parseBitcodeFile(bcBuf, *g->ctx); if (!ModuleOrErr) { Error(SourcePos(), "Error parsing stdlib bitcode: %s", toString(ModuleOrErr.takeError()).c_str()); } else { llvm::Module *bcModule = ModuleOrErr.get().release(); // FIXME: this feels like a bad idea, but the issue is that when we // set the llvm::Module's target triple in the ispc Module::Module // constructor, we start by calling llvm::sys::getHostTriple() (and // then change the arch if needed). Somehow that ends up giving us // strings like 'x86_64-apple-darwin11.0.0', while the stuff we // compile to bitcode with clang has module triples like // 'i386-apple-macosx10.7.0'. And then LLVM issues a warning about // linking together modules with incompatible target triples.. llvm::Triple mTriple(m->module->getTargetTriple()); llvm::Triple bcTriple(bcModule->getTargetTriple()); Debug(SourcePos(), "module triple: %s\nbitcode triple: %s\n", mTriple.str().c_str(), bcTriple.str().c_str()); // Disable this code for cross compilation #if 0 { Assert(bcTriple.getArch() == llvm::Triple::UnknownArch || mTriple.getArch() == bcTriple.getArch()); Assert(bcTriple.getVendor() == llvm::Triple::UnknownVendor || mTriple.getVendor() == bcTriple.getVendor()); // We unconditionally set module DataLayout to library, but we must // ensure that library and module DataLayouts are compatible. // If they are not, we should recompile the library for problematic // architecture and investigate what happened. // Generally we allow library DataLayout to be subset of module // DataLayout or library DataLayout to be empty. if (!VerifyDataLayoutCompatibility(module->getDataLayoutStr(), bcModule->getDataLayoutStr()) && warn) { Warning(SourcePos(), "Module DataLayout is incompatible with " "library DataLayout:\n" "Module DL: %s\n" "Library DL: %s\n", module->getDataLayoutStr().c_str(), bcModule->getDataLayoutStr().c_str()); } } #endif bcModule->setTargetTriple(mTriple.str()); bcModule->setDataLayout(module->getDataLayout()); // A hack to move over declaration, which have no definition. // New linker is kind of smart and think it knows better what to do, so // it removes unused declarations without definitions. // This trick should be legal, as both modules use the same LLVMContext. for (llvm::Function &f : *bcModule) { if (f.isDeclaration()) { // Declarations with uses will be moved by Linker. if (f.getNumUses() > 0) continue; module->getOrInsertFunction(f.getName(), f.getFunctionType(), f.getAttributes()); } } std::unique_ptr<llvm::Module> M(bcModule); if (llvm::Linker::linkModules(*module, std::move(M))) { Error(SourcePos(), "Error linking stdlib bitcode."); } lSetInternalFunctions(module); if (symbolTable != NULL) lAddModuleSymbols(module, symbolTable); lCheckModuleIntrinsics(module); } } /** Utility routine that defines a constant int32 with given value, adding the symbol to both the ispc symbol table and the given LLVM module. */ static void lDefineConstantInt(const char *name, int val, llvm::Module *module, SymbolTable *symbolTable, std::vector<llvm::Constant *> &dbg_sym) { Symbol *sym = new Symbol(name, SourcePos(), AtomicType::UniformInt32->GetAsConstType(), SC_STATIC); sym->constValue = new ConstExpr(sym->type, val, SourcePos()); llvm::Type *ltype = LLVMTypes::Int32Type; llvm::Constant *linit = LLVMInt32(val); auto GV = new llvm::GlobalVariable(*module, ltype, true, llvm::GlobalValue::InternalLinkage, linit, name); dbg_sym.push_back(GV); sym->storagePtr = GV; symbolTable->AddVariable(sym); if (m->diBuilder != NULL) { llvm::DIFile *file = m->diCompileUnit->getFile(); llvm::DICompileUnit *cu = m->diCompileUnit; llvm::DIType *diType = sym->type->GetDIType(file); // FIXME? DWARF says that this (and programIndex below) should // have the DW_AT_artifical attribute. It's not clear if this // matters for anything though. llvm::GlobalVariable *sym_GV_storagePtr = llvm::dyn_cast<llvm::GlobalVariable>(sym->storagePtr); llvm::DIGlobalVariableExpression *var = m->diBuilder->createGlobalVariableExpression(cu, name, name, file, 0 /* line */, diType, true /* static */); sym_GV_storagePtr->addDebugInfo(var); /*#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_6 Assert(var.Verify()); #else // LLVM 3.7+ // coming soon #endif*/ } } static void lDefineConstantIntFunc(const char *name, int val, llvm::Module *module, SymbolTable *symbolTable, std::vector<llvm::Constant *> &dbg_sym) { llvm::SmallVector<const Type *, 8> args; FunctionType *ft = new FunctionType(AtomicType::UniformInt32, args, SourcePos()); Symbol *sym = new Symbol(name, SourcePos(), ft, SC_STATIC); llvm::Function *func = module->getFunction(name); dbg_sym.push_back(func); Assert(func != NULL); // it should be declared already... func->addFnAttr(llvm::Attribute::AlwaysInline); llvm::BasicBlock *bblock = llvm::BasicBlock::Create(*g->ctx, "entry", func, 0); llvm::ReturnInst::Create(*g->ctx, LLVMInt32(val), bblock); sym->function = func; symbolTable->AddVariable(sym); } static void lDefineProgramIndex(llvm::Module *module, SymbolTable *symbolTable, std::vector<llvm::Constant *> &dbg_sym) { Symbol *sym = new Symbol("programIndex", SourcePos(), AtomicType::VaryingInt32->GetAsConstType(), SC_STATIC); int pi[ISPC_MAX_NVEC]; for (int i = 0; i < g->target->getVectorWidth(); ++i) pi[i] = i; sym->constValue = new ConstExpr(sym->type, pi, SourcePos()); llvm::Type *ltype = LLVMTypes::Int32VectorType; llvm::Constant *linit = LLVMInt32Vector(pi); auto GV = new llvm::GlobalVariable(*module, ltype, true, llvm::GlobalValue::InternalLinkage, linit, sym->name.c_str()); dbg_sym.push_back(GV); sym->storagePtr = GV; symbolTable->AddVariable(sym); if (m->diBuilder != NULL) { llvm::DIFile *file = m->diCompileUnit->getFile(); llvm::DICompileUnit *cu = m->diCompileUnit; llvm::DIType *diType = sym->type->GetDIType(file); llvm::GlobalVariable *sym_GV_storagePtr = llvm::dyn_cast<llvm::GlobalVariable>(sym->storagePtr); llvm::DIGlobalVariableExpression *var = m->diBuilder->createGlobalVariableExpression( cu, sym->name.c_str(), sym->name.c_str(), file, 0 /* line */, diType, false /* static */); sym_GV_storagePtr->addDebugInfo(var); /*#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_6 Assert(var.Verify()); #else // LLVM 3.7+ // coming soon #endif*/ } } static void emitLLVMUsed(llvm::Module &module, std::vector<llvm::Constant *> &list) { // Convert list to what ConstantArray needs. llvm::SmallVector<llvm::Constant *, 8> UsedArray; UsedArray.reserve(list.size()); for (auto c : list) { UsedArray.push_back(llvm::ConstantExpr::getPointerBitCastOrAddrSpaceCast(llvm::cast<llvm::Constant>(c), LLVMTypes::Int8PointerType)); } llvm::ArrayType *ATy = llvm::ArrayType::get(LLVMTypes::Int8PointerType, UsedArray.size()); auto *GV = new llvm::GlobalVariable(module, ATy, false, llvm::GlobalValue::AppendingLinkage, llvm::ConstantArray::get(ATy, UsedArray), "llvm.used"); GV->setSection("llvm.metadata"); } void DefineStdlib(SymbolTable *symbolTable, llvm::LLVMContext *ctx, llvm::Module *module, bool includeStdlibISPC) { // debug_symbols are symbols that supposed to be preserved in debug information. // They will be referenced in llvm.used intrinsic to prevent they removal from // the object file. std::vector<llvm::Constant *> debug_symbols; bool warn = g->target->getISA() != Target::GENERIC; // Add the definitions from the compiled builtins.c file. // When compiling for "generic" target family, data layout warnings for // "builtins_bitcode_c" have to be switched off: its DL is incompatible // with the DL of "generic". Anyway, AddBitcodeToModule() corrects this // automatically if DLs differ (by copying module`s DL to export`s DL). // Unlike regular builtins and dispatch module, which don't care about mangling of external functions, // so they only differentiate Windows/Unix and 32/64 bit, builtins-c need to take care about mangling. // Hence, different version for all potentially supported OSes. const BitcodeLib *builtins = g->target_registry->getBuiltinsCLib(g->target_os, g->target->getArch()); Assert(builtins); AddBitcodeToModule(builtins, module, symbolTable, warn); // Next, add the target's custom implementations of the various needed // builtin functions (e.g. __masked_store_32(), etc). const BitcodeLib *target = g->target_registry->getISPCTargetLib(g->target->getISPCTarget(), g->target_os, g->target->getArch()); Assert(target); AddBitcodeToModule(target, module, symbolTable, true); // define the 'programCount' builtin variable lDefineConstantInt("programCount", g->target->getVectorWidth(), module, symbolTable, debug_symbols); // define the 'programIndex' builtin lDefineProgramIndex(module, symbolTable, debug_symbols); // Define __math_lib stuff. This is used by stdlib.ispc, for example, to // figure out which math routines to end up calling... lDefineConstantInt("__math_lib", (int)g->mathLib, module, symbolTable, debug_symbols); lDefineConstantInt("__math_lib_ispc", (int)Globals::Math_ISPC, module, symbolTable, debug_symbols); lDefineConstantInt("__math_lib_ispc_fast", (int)Globals::Math_ISPCFast, module, symbolTable, debug_symbols); lDefineConstantInt("__math_lib_svml", (int)Globals::Math_SVML, module, symbolTable, debug_symbols); lDefineConstantInt("__math_lib_system", (int)Globals::Math_System, module, symbolTable, debug_symbols); lDefineConstantIntFunc("__fast_masked_vload", (int)g->opt.fastMaskedVload, module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_half", g->target->hasHalf(), module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_rand", g->target->hasRand(), module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_transcendentals", g->target->hasTranscendentals(), module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_trigonometry", g->target->hasTrigonometry(), module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_rsqrtd", g->target->hasRsqrtd(), module, symbolTable, debug_symbols); lDefineConstantInt("__have_native_rcpd", g->target->hasRcpd(), module, symbolTable, debug_symbols); if (g->forceAlignment != -1) { llvm::GlobalVariable *alignment = module->getGlobalVariable("memory_alignment", true); alignment->setInitializer(LLVMInt32(g->forceAlignment)); } if (g->generateDebuggingSymbols) { emitLLVMUsed(*module, debug_symbols); } if (includeStdlibISPC) { // If the user wants the standard library to be included, parse the // serialized version of the stdlib.ispc file to get its // definitions added. extern const char stdlib_mask1_code[], stdlib_mask8_code[]; extern const char stdlib_mask16_code[], stdlib_mask32_code[], stdlib_mask64_code[]; if (g->target->getISA() == Target::GENERIC && g->target->getVectorWidth() == 1) { // 1 wide uses 32 stdlib yy_scan_string(stdlib_mask32_code); } else { switch (g->target->getMaskBitCount()) { case 1: yy_scan_string(stdlib_mask1_code); break; case 8: yy_scan_string(stdlib_mask8_code); break; case 16: yy_scan_string(stdlib_mask16_code); break; case 32: yy_scan_string(stdlib_mask32_code); break; case 64: yy_scan_string(stdlib_mask64_code); break; default: FATAL("Unhandled mask bit size for stdlib.ispc"); } } yyparse(); } }