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//===- RuntimeLibcalls.cpp - Interface for runtime libcalls -----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/RuntimeLibcalls.h"
#include "llvm/ADT/StringTable.h"
using namespace llvm;
using namespace RTLIB;
#define GET_INIT_RUNTIME_LIBCALL_NAMES
#define GET_SET_TARGET_RUNTIME_LIBCALL_SETS
#include "llvm/IR/RuntimeLibcalls.inc"
#undef GET_INIT_RUNTIME_LIBCALL_NAMES
#undef GET_SET_TARGET_RUNTIME_LIBCALL_SETS
static void setARMLibcallNames(RuntimeLibcallsInfo &Info, const Triple &TT,
FloatABI::ABIType FloatABIType,
EABI EABIVersion) {
static const RTLIB::LibcallImpl AAPCS_Libcalls[] = {
RTLIB::__aeabi_dadd, RTLIB::__aeabi_ddiv,
RTLIB::__aeabi_dmul, RTLIB::__aeabi_dsub,
RTLIB::__aeabi_dcmpeq__oeq, RTLIB::__aeabi_dcmpeq__une,
RTLIB::__aeabi_dcmplt, RTLIB::__aeabi_dcmple,
RTLIB::__aeabi_dcmpge, RTLIB::__aeabi_dcmpgt,
RTLIB::__aeabi_dcmpun, RTLIB::__aeabi_fadd,
RTLIB::__aeabi_fdiv, RTLIB::__aeabi_fmul,
RTLIB::__aeabi_fsub, RTLIB::__aeabi_fcmpeq__oeq,
RTLIB::__aeabi_fcmpeq__une, RTLIB::__aeabi_fcmplt,
RTLIB::__aeabi_fcmple, RTLIB::__aeabi_fcmpge,
RTLIB::__aeabi_fcmpgt, RTLIB::__aeabi_fcmpun,
RTLIB::__aeabi_d2iz, RTLIB::__aeabi_d2uiz,
RTLIB::__aeabi_d2lz, RTLIB::__aeabi_d2ulz,
RTLIB::__aeabi_f2iz, RTLIB::__aeabi_f2uiz,
RTLIB::__aeabi_f2lz, RTLIB::__aeabi_f2ulz,
RTLIB::__aeabi_d2f, RTLIB::__aeabi_d2h,
RTLIB::__aeabi_f2d, RTLIB::__aeabi_i2d,
RTLIB::__aeabi_ui2d, RTLIB::__aeabi_l2d,
RTLIB::__aeabi_ul2d, RTLIB::__aeabi_i2f,
RTLIB::__aeabi_ui2f, RTLIB::__aeabi_l2f,
RTLIB::__aeabi_ul2f, RTLIB::__aeabi_lmul,
RTLIB::__aeabi_llsl, RTLIB::__aeabi_llsr,
RTLIB::__aeabi_lasr, RTLIB::__aeabi_idiv__i8,
RTLIB::__aeabi_idiv__i16, RTLIB::__aeabi_idiv__i32,
RTLIB::__aeabi_idivmod, RTLIB::__aeabi_uidivmod,
RTLIB::__aeabi_ldivmod, RTLIB::__aeabi_uidiv__i8,
RTLIB::__aeabi_uidiv__i16, RTLIB::__aeabi_uidiv__i32,
RTLIB::__aeabi_uldivmod, RTLIB::__aeabi_f2h,
RTLIB::__aeabi_d2h, RTLIB::__aeabi_h2f,
RTLIB::__aeabi_memcpy, RTLIB::__aeabi_memmove,
RTLIB::__aeabi_memset, RTLIB::__aeabi_memcpy4,
RTLIB::__aeabi_memcpy8, RTLIB::__aeabi_memmove4,
RTLIB::__aeabi_memmove8, RTLIB::__aeabi_memset4,
RTLIB::__aeabi_memset8, RTLIB::__aeabi_memclr,
RTLIB::__aeabi_memclr4, RTLIB::__aeabi_memclr8};
for (RTLIB::LibcallImpl Impl : AAPCS_Libcalls)
Info.setLibcallImplCallingConv(Impl, CallingConv::ARM_AAPCS);
}
void RTLIB::RuntimeLibcallsInfo::initDefaultLibCallImpls() {
std::memcpy(LibcallImpls, DefaultLibcallImpls, sizeof(LibcallImpls));
static_assert(sizeof(LibcallImpls) == sizeof(DefaultLibcallImpls),
"libcall array size should match");
}
/// Set default libcall names. If a target wants to opt-out of a libcall it
/// should be placed here.
void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
ExceptionHandling ExceptionModel,
FloatABI::ABIType FloatABI,
EABI EABIVersion, StringRef ABIName) {
setTargetRuntimeLibcallSets(TT, FloatABI);
// Early exit for targets that have fully ported to tablegen.
if (TT.isAMDGPU() || TT.isNVPTX() || TT.isWasm())
return;
if (TT.isX86() || TT.isVE() || TT.isARM() || TT.isThumb()) {
if (ExceptionModel == ExceptionHandling::SjLj)
setLibcallImpl(RTLIB::UNWIND_RESUME, RTLIB::_Unwind_SjLj_Resume);
}
// A few names are different on particular architectures or environments.
if (TT.isOSDarwin()) {
// For f16/f32 conversions, Darwin uses the standard naming scheme,
// instead of the gnueabi-style __gnu_*_ieee.
// FIXME: What about other targets?
setLibcallImpl(RTLIB::FPEXT_F16_F32, RTLIB::__extendhfsf2);
setLibcallImpl(RTLIB::FPROUND_F32_F16, RTLIB::__truncsfhf2);
if (!darwinHasExp10(TT)) {
setLibcallImpl(RTLIB::EXP10_F32, RTLIB::Unsupported);
setLibcallImpl(RTLIB::EXP10_F64, RTLIB::Unsupported);
}
}
if (TT.isOSOpenBSD()) {
setLibcallImpl(RTLIB::STACKPROTECTOR_CHECK_FAIL, RTLIB::Unsupported);
setLibcallImpl(RTLIB::STACK_SMASH_HANDLER, RTLIB::__stack_smash_handler);
}
// Skip default manual processing for targets that have been fully ported to
// tablegen for now. Eventually the rest of this should be deleted.
if (TT.isX86() || TT.isAArch64() || TT.isWasm())
return;
if (TT.isARM() || TT.isThumb()) {
setARMLibcallNames(*this, TT, FloatABI, EABIVersion);
return;
}
if (hasSinCos(TT)) {
setLibcallImpl(RTLIB::SINCOS_F32, RTLIB::sincosf);
setLibcallImpl(RTLIB::SINCOS_F64, RTLIB::sincos);
setLibcallImpl(RTLIB::SINCOS_F128, RTLIB::sincos_f128);
}
// These libcalls are only available in compiler-rt, not libgcc.
if (TT.isArch64Bit()) {
setLibcallImpl(RTLIB::SHL_I128, RTLIB::__ashlti3);
setLibcallImpl(RTLIB::SRL_I128, RTLIB::__lshrti3);
setLibcallImpl(RTLIB::SRA_I128, RTLIB::__ashrti3);
setLibcallImpl(RTLIB::MUL_I128, RTLIB::__multi3);
setLibcallImpl(RTLIB::MULO_I64, RTLIB::__mulodi4);
}
if (TT.getArch() == Triple::ArchType::msp430) {
setLibcallImplCallingConv(RTLIB::__mspabi_mpyll,
CallingConv::MSP430_BUILTIN);
}
}
bool RuntimeLibcallsInfo::darwinHasExp10(const Triple &TT) {
switch (TT.getOS()) {
case Triple::MacOSX:
return !TT.isMacOSXVersionLT(10, 9);
case Triple::IOS:
return !TT.isOSVersionLT(7, 0);
case Triple::DriverKit:
case Triple::TvOS:
case Triple::WatchOS:
case Triple::XROS:
case Triple::BridgeOS:
return true;
default:
return false;
}
}
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