19ebfa6d0b
Also starts pruning out these calls if the exception model is forced to none. I worked backwards from the logic in addPassesToHandleExceptions and the pass content. There appears to be some tolerance for mixing and matching exception modes inside of a single module. As far as I can tell _Unwind_CallPersonality is only relevant for wasm, so just add it there. As usual, the arm64ec case makes things difficult and is missing test coverage. The set of calls in list form is necessary to use foreach for the duplication, but in every other context a dag is more convenient. You cannot use foreach over a dag, and I haven't found a way to flatten a dag into a list. This removes the last manual setLibcallImpl call in generic code.
97 lines
3.4 KiB
C++
97 lines
3.4 KiB
C++
//===- RuntimeLibcalls.cpp - Interface for runtime libcalls -----*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/RuntimeLibcalls.h"
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#include "llvm/ADT/StringTable.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/xxhash.h"
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#include "llvm/TargetParser/ARMTargetParser.h"
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#define DEBUG_TYPE "runtime-libcalls-info"
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using namespace llvm;
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using namespace RTLIB;
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#define GET_INIT_RUNTIME_LIBCALL_NAMES
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#define GET_SET_TARGET_RUNTIME_LIBCALL_SETS
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#define DEFINE_GET_LOOKUP_LIBCALL_IMPL_NAME
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#include "llvm/IR/RuntimeLibcalls.inc"
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#undef GET_INIT_RUNTIME_LIBCALL_NAMES
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#undef GET_SET_TARGET_RUNTIME_LIBCALL_SETS
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#undef DEFINE_GET_LOOKUP_LIBCALL_IMPL_NAME
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/// Set default libcall names. If a target wants to opt-out of a libcall it
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/// should be placed here.
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void RuntimeLibcallsInfo::initLibcalls(const Triple &TT,
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ExceptionHandling ExceptionModel,
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FloatABI::ABIType FloatABI,
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EABI EABIVersion, StringRef ABIName) {
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setTargetRuntimeLibcallSets(TT, ExceptionModel, FloatABI, EABIVersion,
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ABIName);
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if (TT.isARM() || TT.isThumb()) {
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// The half <-> float conversion functions are always soft-float on
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// non-watchos platforms, but are needed for some targets which use a
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// hard-float calling convention by default.
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if (!TT.isWatchABI()) {
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if (isAAPCS_ABI(TT, ABIName)) {
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setLibcallImplCallingConv(RTLIB::__truncsfhf2, CallingConv::ARM_AAPCS);
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setLibcallImplCallingConv(RTLIB::__truncdfhf2, CallingConv::ARM_AAPCS);
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setLibcallImplCallingConv(RTLIB::__extendhfsf2, CallingConv::ARM_AAPCS);
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} else {
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setLibcallImplCallingConv(RTLIB::__truncsfhf2, CallingConv::ARM_APCS);
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setLibcallImplCallingConv(RTLIB::__truncdfhf2, CallingConv::ARM_APCS);
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setLibcallImplCallingConv(RTLIB::__extendhfsf2, CallingConv::ARM_APCS);
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}
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}
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return;
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}
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}
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LLVM_ATTRIBUTE_ALWAYS_INLINE
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iota_range<RTLIB::LibcallImpl>
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RuntimeLibcallsInfo::libcallImplNameHit(uint16_t NameOffsetEntry,
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uint16_t StrOffset) {
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int NumAliases = 1;
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for (uint16_t Entry : ArrayRef(RuntimeLibcallNameOffsetTable)
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.drop_front(NameOffsetEntry + 1)) {
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if (Entry != StrOffset)
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break;
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++NumAliases;
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}
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RTLIB::LibcallImpl ImplStart = static_cast<RTLIB::LibcallImpl>(
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&RuntimeLibcallNameOffsetTable[NameOffsetEntry] -
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&RuntimeLibcallNameOffsetTable[0]);
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return enum_seq(ImplStart,
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static_cast<RTLIB::LibcallImpl>(ImplStart + NumAliases));
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}
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bool RuntimeLibcallsInfo::isAAPCS_ABI(const Triple &TT, StringRef ABIName) {
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const ARM::ARMABI TargetABI = ARM::computeTargetABI(TT, ABIName);
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return TargetABI == ARM::ARM_ABI_AAPCS || TargetABI == ARM::ARM_ABI_AAPCS16;
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}
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bool RuntimeLibcallsInfo::darwinHasExp10(const Triple &TT) {
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switch (TT.getOS()) {
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case Triple::MacOSX:
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return !TT.isMacOSXVersionLT(10, 9);
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case Triple::IOS:
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return !TT.isOSVersionLT(7, 0);
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case Triple::DriverKit:
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case Triple::TvOS:
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case Triple::WatchOS:
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case Triple::XROS:
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case Triple::BridgeOS:
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return true;
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default:
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return false;
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}
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}
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