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builtins.cpp
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/*
Copyright (c) 2010-2015, 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 "type.h"
#include "util.h"
#include "sym.h"
#include "expr.h"
#include "llvmutil.h"
#include "module.h"
#include "ctx.h"
#include <math.h>
#include <stdlib.h>
#if ISPC_LLVM_VERSION == ISPC_LLVM_3_2
#include <llvm/Attributes.h>
#include <llvm/LLVMContext.h>
#include <llvm/Module.h>
#include <llvm/Type.h>
#include <llvm/Instructions.h>
#include <llvm/Intrinsics.h>
#include <llvm/DerivedTypes.h>
#else
#include <llvm/IR/Attributes.h>
#include <llvm/IR/LLVMContext.h>
#include <llvm/IR/Module.h>
#include <llvm/IR/Type.h>
#include <llvm/IR/Instructions.h>
#include <llvm/IR/Intrinsics.h>
#include <llvm/IR/DerivedTypes.h>
#endif
#if ISPC_LLVM_VERSION >= ISPC_LLVM_3_5
#include <llvm/Linker/Linker.h>
#else
#include <llvm/Linker.h>
#endif
#include <llvm/Target/TargetMachine.h>
#include <llvm/ADT/Triple.h>
#include <llvm/Support/MemoryBuffer.h>
#include <llvm/Bitcode/ReaderWriter.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 = 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) {
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_7 /* 3.2, 3.3, 3.4, 3.5, 3.6, 3.7 */
llvm::Function *func = iter;
#else /* LLVM 3.8+ */
llvm::Function *func = &*iter;
#endif
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) {
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_7 /* 3.2, 3.3, 3.4, 3.5, 3.6, 3.7 */
llvm::Function *func = iter;
#else /* LLVM 3.8+ */
llvm::Function *func = &*iter;
#endif
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) fprintf(stderr, "FATAL: intrinsic is not found: %s \n", funcName.c_str());
Assert(id != 0);
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) {
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_float",
//#ifdef ISPC_NVPTX_ENABLED
"__aos_to_soa3_float1",
//#endif /* ISPC_NVPTX_ENABLED */
"__aos_to_soa3_float16",
"__aos_to_soa3_float4",
"__aos_to_soa3_float8",
"__aos_to_soa3_int32",
"__aos_to_soa4_float",
//#ifdef ISPC_NVPTX_ENABLED
"__aos_to_soa4_float1",
//#endif /* ISPC_NVPTX_ENABLED */
"__aos_to_soa4_float16",
"__aos_to_soa4_float4",
"__aos_to_soa4_float8",
"__aos_to_soa4_int32",
"__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",
//#ifdef ISPC_NVPTX_ENABLED
"__atomic_add_varying_int32_global",
"__atomic_add_varying_int64_global",
"__atomic_and_varying_int32_global",
"__atomic_and_varying_int64_global",
"__atomic_compare_exchange_varying_double_global",
"__atomic_compare_exchange_varying_float_global",
"__atomic_compare_exchange_varying_int32_global",
"__atomic_compare_exchange_varying_int64_global",
"__atomic_max_varying_int32_global",
"__atomic_max_varying_int64_global",
"__atomic_min_varying_int32_global",
"__atomic_min_varying_int64_global",
"__atomic_or_varying_int32_global",
"__atomic_or_varying_int64_global",
"__atomic_sub_varying_int32_global",
"__atomic_sub_varying_int64_global",
"__atomic_swap_varying_double_global",
"__atomic_swap_varying_float_global",
"__atomic_swap_varying_int32_global",
"__atomic_swap_varying_int64_global",
"__atomic_umax_varying_uint32_global",
"__atomic_umax_varying_uint64_global",
"__atomic_umin_varying_uint32_global",
"__atomic_umin_varying_uint64_global",
"__atomic_xor_uniform_int32_global",
"__atomic_xor_uniform_int64_global",
"__atomic_xor_varying_int32_global",
"__atomic_xor_varying_int64_global",
"__atomic_xor_varying_int32_global",
"__atomic_xor_varying_int64_global",
//#endif /* ISPC_NVPTX_ENABLED */
"__broadcast_double",
"__broadcast_float",
"__broadcast_i16",
"__broadcast_i32",
"__broadcast_i64",
"__broadcast_i8",
"__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",
//#ifdef ISPC_NVPTX_ENABLED
"__do_print_nvptx",
//#endif /* ISPC_NVPTX_ENABLED */
"__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_int16",
"__extract_int32",
"__extract_int64",
"__extract_int8",
//#ifdef ISPC_NVPTX_ENABLED
"__extract_float",
"__extract_double",
//#endif /* ISPC_NVPTX_ENABLED */
"__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_int16",
"__insert_int32",
"__insert_int64",
"__insert_int8",
//#ifdef ISPC_NVPTX_ENABLED
"__insert_float",
"__insert_double",
//#endif /* ISPC_NVPTX_ENABLED */
"__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",
//#ifdef ISPC_NVPTX_ENABLED
"__movmsk_ptx",
//#endif /* ISPC_NVPTX_ENABLED */
"__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_uniform_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_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_float",
"__soa_to_aos3_float16",
"__soa_to_aos3_float4",
"__soa_to_aos3_float8",
"__soa_to_aos3_int32",
"__soa_to_aos4_float",
//#ifdef ISPC_NVPTX_ENABLED
"__soa_to_aos3_float1",
"__soa_to_aos4_float1",
//#endif /* ISPC_NVPTX_ENABLED */
"__soa_to_aos4_float16",
"__soa_to_aos4_float4",
"__soa_to_aos4_float8",
"__soa_to_aos4_int32",
"__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",
"__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",
//#ifdef ISPC_NVPTX_ENABLED
"__program_index",
"__program_count",
"__warp_index",
"__task_index0",
"__task_index1",
"__task_index2",
"__task_index",
"__task_count0",
"__task_count1",
"__task_count2",
"__task_count",
"__cvt_loc2gen",
"__cvt_loc2gen_var",
"__cvt_const2gen",
"__puts_nvptx",
"ISPCAlloc",
"ISPCLaunch",
"ISPCSync",
//#endif /* ISPC_NVPTX_ENABLED */
"__vselect_i32"
};
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);
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 bitcode Binary LLVM bitcode (e.g. the contents of a *.bc file)
@param length Length of the bitcode buffer
@param module Module to link the bitcode into
@param symbolTable Symbol table to add definitions to
*/
void
AddBitcodeToModule(const unsigned char *bitcode, int length,
llvm::Module *module, SymbolTable *symbolTable, bool warn) {
llvm::StringRef sb = llvm::StringRef((char *)bitcode, length);
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_5
llvm::MemoryBuffer *bcBuf = llvm::MemoryBuffer::getMemBuffer(sb);
#else // LLVM 3.6+
llvm::MemoryBufferRef bcBuf = llvm::MemoryBuffer::getMemBuffer(sb)->getMemBufferRef();
#endif
#if ISPC_LLVM_VERSION >= ISPC_LLVM_3_7 // LLVM 3.7+
llvm::ErrorOr<std::unique_ptr<llvm::Module>> ModuleOrErr = llvm::parseBitcodeFile(bcBuf, *g->ctx);
if (std::error_code EC = ModuleOrErr.getError())
Error(SourcePos(), "Error parsing stdlib bitcode: %s", EC.message().c_str());
else {
llvm::Module *bcModule = ModuleOrErr.get().release();
#elif ISPC_LLVM_VERSION == ISPC_LLVM_3_5 || ISPC_LLVM_VERSION == ISPC_LLVM_3_6
llvm::ErrorOr<llvm::Module *> ModuleOrErr = llvm::parseBitcodeFile(bcBuf, *g->ctx);
if (std::error_code EC = ModuleOrErr.getError())
Error(SourcePos(), "Error parsing stdlib bitcode: %s", EC.message().c_str());
else {
llvm::Module *bcModule = ModuleOrErr.get();
#else // LLVM 3.2 - 3.4
std::string bcErr;
llvm::Module *bcModule = llvm::ParseBitcodeFile(bcBuf, *g->ctx, &bcErr);
if (!bcModule)
Error(SourcePos(), "Error parsing stdlib bitcode: %s", bcErr.c_str());
else {
#endif
// 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());
#if defined(ISPC_ARM_ENABLED) && !defined(__arm__)
// FIXME: More ugly and dangerous stuff. We really haven't set up
// proper build and runtime infrastructure for ispc to do
// cross-compilation, yet it's at minimum useful to be able to emit
// ARM code from x86 for ispc development. One side-effect is that
// when the build process turns builtins/builtins.c to LLVM bitcode
// for us to link in at runtime, that bitcode has been compiled for
// an IA target, which in turn causes the checks in the following
// code to (appropraitely) fail.
//
// In order to be able to have some ability to generate ARM code on
// IA, we'll just skip those tests in that case and allow the
// setTargetTriple() and setDataLayout() calls below to shove in
// the values for an ARM target. This maybe won't cause problems
// in the generated code, since bulitins.c doesn't do anything too
// complex w.r.t. struct layouts, etc.
if (g->target->getISA() != Target::NEON32 &&
g->target->getISA() != Target::NEON16 &&
g->target->getISA() != Target::NEON8)
#endif // !__arm__
#ifdef ISPC_NVPTX_ENABLED
if (g->target->getISA() != Target::NVPTX)
#endif /* ISPC_NVPTX_ENABLED */
{
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 ISPC_LLVM_VERSION >= ISPC_LLVM_3_5
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());
}
#else
if (!VerifyDataLayoutCompatibility(module->getDataLayout(),
bcModule->getDataLayout())
&& warn) {
Warning(SourcePos(), "Module DataLayout is incompatible with "
"library DataLayout:\n"
"Module DL: %s\n"
"Library DL: %s\n",
module->getDataLayout().c_str(),
bcModule->getDataLayout().c_str());
}
#endif
}
bcModule->setTargetTriple(mTriple.str());
bcModule->setDataLayout(module->getDataLayout());
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_5 // 3.2-3.5
std::string(linkError);
if (llvm::Linker::LinkModules(module, bcModule,
llvm::Linker::DestroySource,
&linkError))
Error(SourcePos(), "Error linking stdlib bitcode: %s", linkError.c_str());
#elif ISPC_LLVM_VERSION <= ISPC_LLVM_3_7 // 3.6-3.7
llvm::Linker::LinkModules(module, bcModule);
#else // LLVM 3.8+
// 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.");
}
#endif
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) {
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);
// Use WeakODRLinkage rather than InternalLinkage so that a definition
// survives even if it's not used in the module, so that the symbol is
// there in the debugger.
llvm::GlobalValue::LinkageTypes linkage = g->generateDebuggingSymbols ?
llvm::GlobalValue::WeakODRLinkage : llvm::GlobalValue::InternalLinkage;
sym->storagePtr = new llvm::GlobalVariable(*module, ltype, true, linkage,
linit, name);
symbolTable->AddVariable(sym);
if (m->diBuilder != NULL) {
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_6
llvm::DIFile file;
llvm::DIType diType = sym->type->GetDIType(file);
Assert(diType.Verify());
#else // LLVM 3.7+
llvm::DIFile *file =
m->diBuilder->createFile(m->diCompileUnit->getFilename(),
m->diCompileUnit->getDirectory());
llvm::DIType *diType = sym->type->GetDIType(file);
// Assert(diType.Verify());
#endif
// 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.
#if ISPC_LLVM_VERSION <= ISPC_LLVM_3_5
llvm::DIGlobalVariable var = m->diBuilder->createGlobalVariable(
name,
file,
0 /* line */,
diType,
true /* static */,
sym->storagePtr);
#elif ISPC_LLVM_VERSION == ISPC_LLVM_3_6 // LLVM 3.6
llvm::Constant *sym_const_storagePtr = llvm::dyn_cast<llvm::Constant>(sym->storagePtr);
Assert(sym_const_storagePtr);
llvm::DIGlobalVariable var = m->diBuilder->createGlobalVariable(
file,
name,
name,
file,
0 /* line */,
diType,
true /* static */,
sym_const_storagePtr);
#else // LLVM 3.7+
llvm::Constant *sym_const_storagePtr = llvm::dyn_cast<llvm::Constant>(sym->storagePtr);
Assert(sym_const_storagePtr);
m->diBuilder->createGlobalVariable(
file,
name,
name,
file,
0 /* line */,
diType,
true /* static */,
sym_const_storagePtr);
#endif