| //===- subzero/src/IceTargetLoweringX8632.cpp - x86-32 lowering -----------===// |
| // |
| // The Subzero Code Generator |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// |
| /// \file |
| /// \brief Implements the TargetLoweringX8632 class, which consists almost |
| /// entirely of the lowering sequence for each high-level instruction. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #include "IceTargetLoweringX8632.h" |
| |
| #include "IceTargetLoweringX8632Traits.h" |
| |
| #if defined(_WIN32) |
| extern "C" void _chkstk(); |
| #endif |
| |
| namespace X8632 { |
| std::unique_ptr<::Ice::TargetLowering> createTargetLowering(::Ice::Cfg *Func) { |
| return ::Ice::X8632::TargetX8632::create(Func); |
| } |
| |
| std::unique_ptr<::Ice::TargetDataLowering> |
| createTargetDataLowering(::Ice::GlobalContext *Ctx) { |
| return ::Ice::X8632::TargetDataX86<::Ice::X8632::TargetX8632Traits>::create( |
| Ctx); |
| } |
| |
| std::unique_ptr<::Ice::TargetHeaderLowering> |
| createTargetHeaderLowering(::Ice::GlobalContext *Ctx) { |
| return ::Ice::X8632::TargetHeaderX86::create(Ctx); |
| } |
| |
| void staticInit(::Ice::GlobalContext *Ctx) { |
| ::Ice::X8632::TargetX8632::staticInit(Ctx); |
| } |
| |
| bool shouldBePooled(const class ::Ice::Constant *C) { |
| return ::Ice::X8632::TargetX8632::shouldBePooled(C); |
| } |
| |
| ::Ice::Type getPointerType() { |
| return ::Ice::X8632::TargetX8632::getPointerType(); |
| } |
| |
| } // end of namespace X8632 |
| |
| namespace Ice { |
| namespace X8632 { |
| |
| //------------------------------------------------------------------------------ |
| // ______ ______ ______ __ ______ ______ |
| // /\__ _\ /\ == \ /\ __ \ /\ \ /\__ _\ /\ ___\ |
| // \/_/\ \/ \ \ __< \ \ __ \ \ \ \ \/_/\ \/ \ \___ \ |
| // \ \_\ \ \_\ \_\ \ \_\ \_\ \ \_\ \ \_\ \/\_____\ |
| // \/_/ \/_/ /_/ \/_/\/_/ \/_/ \/_/ \/_____/ |
| // |
| //------------------------------------------------------------------------------ |
| const TargetX8632Traits::TableFcmpType TargetX8632Traits::TableFcmp[] = { |
| #define X(val, dflt, swapS, C1, C2, swapV, pred) \ |
| {dflt, \ |
| swapS, \ |
| X8632::Traits::Cond::C1, \ |
| X8632::Traits::Cond::C2, \ |
| swapV, \ |
| X8632::Traits::Cond::pred}, |
| FCMPX8632_TABLE |
| #undef X |
| }; |
| |
| const size_t TargetX8632Traits::TableFcmpSize = llvm::array_lengthof(TableFcmp); |
| |
| const TargetX8632Traits::TableIcmp32Type TargetX8632Traits::TableIcmp32[] = { |
| #define X(val, C_32, C1_64, C2_64, C3_64) {X8632::Traits::Cond::C_32}, |
| ICMPX8632_TABLE |
| #undef X |
| }; |
| |
| const size_t TargetX8632Traits::TableIcmp32Size = |
| llvm::array_lengthof(TableIcmp32); |
| |
| const TargetX8632Traits::TableIcmp64Type TargetX8632Traits::TableIcmp64[] = { |
| #define X(val, C_32, C1_64, C2_64, C3_64) \ |
| {X8632::Traits::Cond::C1_64, X8632::Traits::Cond::C2_64, \ |
| X8632::Traits::Cond::C3_64}, |
| ICMPX8632_TABLE |
| #undef X |
| }; |
| |
| const size_t TargetX8632Traits::TableIcmp64Size = |
| llvm::array_lengthof(TableIcmp64); |
| |
| const TargetX8632Traits::TableTypeX8632AttributesType |
| TargetX8632Traits::TableTypeX8632Attributes[] = { |
| #define X(tag, elty, cvt, sdss, pdps, spsd, int_, unpack, pack, width, fld) \ |
| {IceType_##elty}, |
| ICETYPEX8632_TABLE |
| #undef X |
| }; |
| |
| const size_t TargetX8632Traits::TableTypeX8632AttributesSize = |
| llvm::array_lengthof(TableTypeX8632Attributes); |
| |
| #if defined(_WIN32) |
| // Windows 32-bit only guarantees 4 byte stack alignment |
| const uint32_t TargetX8632Traits::X86_STACK_ALIGNMENT_BYTES = 4; |
| #else |
| const uint32_t TargetX8632Traits::X86_STACK_ALIGNMENT_BYTES = 16; |
| #endif |
| const char *TargetX8632Traits::TargetName = "X8632"; |
| |
| template <> |
| std::array<SmallBitVector, RCX86_NUM> |
| TargetX86Base<X8632::Traits>::TypeToRegisterSet = {{}}; |
| |
| template <> |
| std::array<SmallBitVector, RCX86_NUM> |
| TargetX86Base<X8632::Traits>::TypeToRegisterSetUnfiltered = {{}}; |
| |
| template <> |
| std::array<SmallBitVector, |
| TargetX86Base<X8632::Traits>::Traits::RegisterSet::Reg_NUM> |
| TargetX86Base<X8632::Traits>::RegisterAliases = {{}}; |
| |
| //------------------------------------------------------------------------------ |
| // __ ______ __ __ ______ ______ __ __ __ ______ |
| // /\ \ /\ __ \/\ \ _ \ \/\ ___\/\ == \/\ \/\ "-.\ \/\ ___\ |
| // \ \ \___\ \ \/\ \ \ \/ ".\ \ \ __\\ \ __<\ \ \ \ \-. \ \ \__ \ |
| // \ \_____\ \_____\ \__/".~\_\ \_____\ \_\ \_\ \_\ \_\\"\_\ \_____\ |
| // \/_____/\/_____/\/_/ \/_/\/_____/\/_/ /_/\/_/\/_/ \/_/\/_____/ |
| // |
| //------------------------------------------------------------------------------ |
| void TargetX8632::_add_sp(Operand *Adjustment) { |
| Variable *esp = getPhysicalRegister(Traits::RegisterSet::Reg_esp); |
| _add(esp, Adjustment); |
| } |
| |
| void TargetX8632::_mov_sp(Operand *NewValue) { |
| Variable *esp = getPhysicalRegister(Traits::RegisterSet::Reg_esp); |
| _redefined(_mov(esp, NewValue)); |
| } |
| |
| void TargetX8632::_sub_sp(Operand *Adjustment) { |
| Variable *esp = getPhysicalRegister(Traits::RegisterSet::Reg_esp); |
| _sub(esp, Adjustment); |
| // Add a fake use of the stack pointer, to prevent the stack pointer adustment |
| // from being dead-code eliminated in a function that doesn't return. |
| Context.insert<InstFakeUse>(esp); |
| } |
| |
| void TargetX8632::_link_bp() { |
| Variable *ebp = getPhysicalRegister(Traits::RegisterSet::Reg_ebp); |
| Variable *esp = getPhysicalRegister(Traits::RegisterSet::Reg_esp); |
| _push(ebp); |
| _mov(ebp, esp); |
| // Keep ebp live for late-stage liveness analysis (e.g. asm-verbose mode). |
| Context.insert<InstFakeUse>(ebp); |
| } |
| |
| void TargetX8632::_unlink_bp() { |
| Variable *esp = getPhysicalRegister(Traits::RegisterSet::Reg_esp); |
| Variable *ebp = getPhysicalRegister(Traits::RegisterSet::Reg_ebp); |
| // For late-stage liveness analysis (e.g. asm-verbose mode), adding a fake |
| // use of esp before the assignment of esp=ebp keeps previous esp |
| // adjustments from being dead-code eliminated. |
| Context.insert<InstFakeUse>(esp); |
| _mov(esp, ebp); |
| _pop(ebp); |
| } |
| |
| void TargetX8632::_push_reg(RegNumT RegNum) { |
| _push(getPhysicalRegister(RegNum, Traits::WordType)); |
| } |
| |
| void TargetX8632::_pop_reg(RegNumT RegNum) { |
| _pop(getPhysicalRegister(RegNum, Traits::WordType)); |
| } |
| |
| void TargetX8632::lowerIndirectJump(Variable *JumpTarget) { _jmp(JumpTarget); } |
| |
| Inst *TargetX8632::emitCallToTarget(Operand *CallTarget, Variable *ReturnReg, |
| size_t NumVariadicFpArgs) { |
| (void)NumVariadicFpArgs; |
| // Note that NumVariadicFpArgs is only used for System V x86-64 variadic |
| // calls, because floating point arguments are passed via vector registers, |
| // whereas for x86-32, all args are passed via the stack. |
| |
| return Context.insert<Traits::Insts::Call>(ReturnReg, CallTarget); |
| } |
| |
| Variable *TargetX8632::moveReturnValueToRegister(Operand *Value, |
| Type ReturnType) { |
| if (isVectorType(ReturnType)) { |
| return legalizeToReg(Value, Traits::RegisterSet::Reg_xmm0); |
| } else if (isScalarFloatingType(ReturnType)) { |
| _fld(Value); |
| return nullptr; |
| } else { |
| assert(ReturnType == IceType_i32 || ReturnType == IceType_i64); |
| if (ReturnType == IceType_i64) { |
| Variable *eax = |
| legalizeToReg(loOperand(Value), Traits::RegisterSet::Reg_eax); |
| Variable *edx = |
| legalizeToReg(hiOperand(Value), Traits::RegisterSet::Reg_edx); |
| Context.insert<InstFakeUse>(edx); |
| return eax; |
| } else { |
| Variable *Reg = nullptr; |
| _mov(Reg, Value, Traits::RegisterSet::Reg_eax); |
| return Reg; |
| } |
| } |
| } |
| |
| void TargetX8632::emitStackProbe(size_t StackSizeBytes) { |
| #if defined(_WIN32) |
| if (StackSizeBytes >= 4096) { |
| // _chkstk on Win32 is actually __alloca_probe, which adjusts ESP by the |
| // stack amount specified in EAX, so we save ESP in ECX, and restore them |
| // both after the call. |
| |
| Variable *EAX = makeReg(IceType_i32, Traits::RegisterSet::Reg_eax); |
| Variable *ESP = makeReg(IceType_i32, Traits::RegisterSet::Reg_esp); |
| Variable *ECX = makeReg(IceType_i32, Traits::RegisterSet::Reg_ecx); |
| |
| _push_reg(ECX->getRegNum()); |
| _mov(ECX, ESP); |
| |
| _mov(EAX, Ctx->getConstantInt32(StackSizeBytes)); |
| |
| auto *CallTarget = |
| Ctx->getConstantInt32(reinterpret_cast<int32_t>(&_chkstk)); |
| emitCallToTarget(CallTarget, nullptr); |
| |
| _mov(ESP, ECX); |
| _pop_reg(ECX->getRegNum()); |
| } |
| #endif |
| } |
| |
| // In some cases, there are x-macros tables for both high-level and low-level |
| // instructions/operands that use the same enum key value. The tables are kept |
| // separate to maintain a proper separation between abstraction layers. There |
| // is a risk that the tables could get out of sync if enum values are reordered |
| // or if entries are added or deleted. The following dummy namespaces use |
| // static_asserts to ensure everything is kept in sync. |
| |
| namespace { |
| // Validate the enum values in FCMPX8632_TABLE. |
| namespace dummy1 { |
| // Define a temporary set of enum values based on low-level table entries. |
| enum _tmp_enum { |
| #define X(val, dflt, swapS, C1, C2, swapV, pred) _tmp_##val, |
| FCMPX8632_TABLE |
| #undef X |
| _num |
| }; |
| // Define a set of constants based on high-level table entries. |
| #define X(tag, str) static const int _table1_##tag = InstFcmp::tag; |
| ICEINSTFCMP_TABLE |
| #undef X |
| // Define a set of constants based on low-level table entries, and ensure the |
| // table entry keys are consistent. |
| #define X(val, dflt, swapS, C1, C2, swapV, pred) \ |
| static const int _table2_##val = _tmp_##val; \ |
| static_assert( \ |
| _table1_##val == _table2_##val, \ |
| "Inconsistency between FCMPX8632_TABLE and ICEINSTFCMP_TABLE"); |
| FCMPX8632_TABLE |
| #undef X |
| // Repeat the static asserts with respect to the high-level table entries in |
| // case the high-level table has extra entries. |
| #define X(tag, str) \ |
| static_assert( \ |
| _table1_##tag == _table2_##tag, \ |
| "Inconsistency between FCMPX8632_TABLE and ICEINSTFCMP_TABLE"); |
| ICEINSTFCMP_TABLE |
| #undef X |
| } // end of namespace dummy1 |
| |
| // Validate the enum values in ICMPX8632_TABLE. |
| namespace dummy2 { |
| // Define a temporary set of enum values based on low-level table entries. |
| enum _tmp_enum { |
| #define X(val, C_32, C1_64, C2_64, C3_64) _tmp_##val, |
| ICMPX8632_TABLE |
| #undef X |
| _num |
| }; |
| // Define a set of constants based on high-level table entries. |
| #define X(tag, reverse, str) static const int _table1_##tag = InstIcmp::tag; |
| ICEINSTICMP_TABLE |
| #undef X |
| // Define a set of constants based on low-level table entries, and ensure the |
| // table entry keys are consistent. |
| #define X(val, C_32, C1_64, C2_64, C3_64) \ |
| static const int _table2_##val = _tmp_##val; \ |
| static_assert( \ |
| _table1_##val == _table2_##val, \ |
| "Inconsistency between ICMPX8632_TABLE and ICEINSTICMP_TABLE"); |
| ICMPX8632_TABLE |
| #undef X |
| // Repeat the static asserts with respect to the high-level table entries in |
| // case the high-level table has extra entries. |
| #define X(tag, reverse, str) \ |
| static_assert( \ |
| _table1_##tag == _table2_##tag, \ |
| "Inconsistency between ICMPX8632_TABLE and ICEINSTICMP_TABLE"); |
| ICEINSTICMP_TABLE |
| #undef X |
| } // end of namespace dummy2 |
| |
| // Validate the enum values in ICETYPEX8632_TABLE. |
| namespace dummy3 { |
| // Define a temporary set of enum values based on low-level table entries. |
| enum _tmp_enum { |
| #define X(tag, elty, cvt, sdss, pdps, spsd, int_, unpack, pack, width, fld) \ |
| _tmp_##tag, |
| ICETYPEX8632_TABLE |
| #undef X |
| _num |
| }; |
| // Define a set of constants based on high-level table entries. |
| #define X(tag, sizeLog2, align, elts, elty, str, rcstr) \ |
| static const int _table1_##tag = IceType_##tag; |
| ICETYPE_TABLE |
| #undef X |
| // Define a set of constants based on low-level table entries, and ensure the |
| // table entry keys are consistent. |
| #define X(tag, elty, cvt, sdss, pdps, spsd, int_, unpack, pack, width, fld) \ |
| static const int _table2_##tag = _tmp_##tag; \ |
| static_assert(_table1_##tag == _table2_##tag, \ |
| "Inconsistency between ICETYPEX8632_TABLE and ICETYPE_TABLE"); |
| ICETYPEX8632_TABLE |
| #undef X |
| // Repeat the static asserts with respect to the high-level table entries in |
| // case the high-level table has extra entries. |
| #define X(tag, sizeLog2, align, elts, elty, str, rcstr) \ |
| static_assert(_table1_##tag == _table2_##tag, \ |
| "Inconsistency between ICETYPEX8632_TABLE and ICETYPE_TABLE"); |
| ICETYPE_TABLE |
| #undef X |
| } // end of namespace dummy3 |
| } // end of anonymous namespace |
| |
| } // end of namespace X8632 |
| } // end of namespace Ice |
