mirror of
https://github.com/c64scene-ar/llvm-6502.git
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f0144127b9
it is highly specific to the object file that will be generated in the end, this introduces a new TargetLoweringObjectFile interface that is implemented for each of ELF/MachO/COFF/Alpha/PIC16 and XCore. Though still is still a brutal and ugly refactoring, this is a major step towards goodness. This patch also: 1. fixes a bunch of dangling pointer problems in the PIC16 backend. 2. disables the TargetLowering copy ctor which PIC16 was accidentally using. 3. gets us closer to xcore having its own crazy target section flags and pic16 not having to shadow sections with its own objects. 4. fixes wierdness where ELF targets would set CStringSection but not CStringSection_. Factor the code better. 5. fixes some bugs in string lowering on ELF targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77294 91177308-0d34-0410-b5e6-96231b3b80d8
262 lines
8.2 KiB
C++
262 lines
8.2 KiB
C++
//===-- X86TargetAsmInfo.cpp - X86 asm properties ---------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains the declarations of the X86TargetAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "X86TargetAsmInfo.h"
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#include "X86TargetMachine.h"
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#include "X86Subtarget.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/InlineAsm.h"
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#include "llvm/Instructions.h"
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#include "llvm/Intrinsics.h"
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#include "llvm/Module.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/Dwarf.h"
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#include "llvm/Support/ErrorHandling.h"
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using namespace llvm;
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using namespace llvm::dwarf;
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const char *const llvm::x86_asm_table[] = {
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"{si}", "S",
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"{di}", "D",
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"{ax}", "a",
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"{cx}", "c",
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"{memory}", "memory",
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"{flags}", "",
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"{dirflag}", "",
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"{fpsr}", "",
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"{cc}", "cc",
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0,0};
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X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
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X86TargetAsmInfo<DarwinTargetAsmInfo>(TM) {
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const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
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bool is64Bit = Subtarget->is64Bit();
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AlignmentIsInBytes = false;
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TextAlignFillValue = 0x90;
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if (!is64Bit)
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Data64bitsDirective = 0; // we can't emit a 64-bit unit
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ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
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ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
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if (TM.getRelocationModel() != Reloc::Static)
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ConstantPoolSection = "\t.const_data";
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else
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ConstantPoolSection = "\t.const\n";
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LCOMMDirective = "\t.lcomm\t";
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// Leopard and above support aligned common symbols.
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COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
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HasDotTypeDotSizeDirective = false;
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if (is64Bit) {
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PersonalityPrefix = "";
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PersonalitySuffix = "+4@GOTPCREL";
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} else {
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PersonalityPrefix = "L";
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PersonalitySuffix = "$non_lazy_ptr";
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}
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InlineAsmStart = "## InlineAsm Start";
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InlineAsmEnd = "## InlineAsm End";
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CommentString = "##";
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SetDirective = "\t.set";
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PCSymbol = ".";
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UsedDirective = "\t.no_dead_strip\t";
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ProtectedDirective = "\t.globl\t";
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SupportsDebugInformation = true;
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DwarfDebugInlineSection = ".section __DWARF,__debug_inlined,regular,debug";
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DwarfUsesInlineInfoSection = true;
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// Exceptions handling
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SupportsExceptionHandling = true;
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GlobalEHDirective = "\t.globl\t";
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SupportsWeakOmittedEHFrame = false;
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AbsoluteEHSectionOffsets = false;
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DwarfEHFrameSection =
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".section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support";
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DwarfExceptionSection = ".section __DATA,__gcc_except_tab";
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}
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unsigned
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X86DarwinTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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if (Reason == DwarfEncoding::Functions && Global)
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return (DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4);
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if (Reason == DwarfEncoding::CodeLabels || !Global)
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return DW_EH_PE_pcrel;
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return DW_EH_PE_absptr;
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}
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const char *
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X86DarwinTargetAsmInfo::getEHGlobalPrefix() const {
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const X86Subtarget* Subtarget = &TM.getSubtarget<X86Subtarget>();
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if (Subtarget->getDarwinVers() > 9)
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return PrivateGlobalPrefix;
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return "";
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}
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X86ELFTargetAsmInfo::X86ELFTargetAsmInfo(const X86TargetMachine &TM) :
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X86TargetAsmInfo<ELFTargetAsmInfo>(TM) {
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CStringSection = ".rodata.str";
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PrivateGlobalPrefix = ".L";
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WeakRefDirective = "\t.weak\t";
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SetDirective = "\t.set\t";
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PCSymbol = ".";
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// Set up DWARF directives
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HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
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// Debug Information
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AbsoluteDebugSectionOffsets = true;
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SupportsDebugInformation = true;
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DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
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DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
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DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
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DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
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DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
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DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
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DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
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DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
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DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
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DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
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DwarfMacroInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
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// Exceptions handling
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SupportsExceptionHandling = true;
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AbsoluteEHSectionOffsets = false;
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DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
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DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
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// On Linux we must declare when we can use a non-executable stack.
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if (TM.getSubtarget<X86Subtarget>().isLinux())
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NonexecutableStackDirective = "\t.section\t.note.GNU-stack,\"\",@progbits";
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}
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unsigned
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X86ELFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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CodeModel::Model CM = TM.getCodeModel();
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bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
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if (TM.getRelocationModel() == Reloc::PIC_) {
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unsigned Format = 0;
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if (!is64Bit)
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// 32 bit targets always encode pointers as 4 bytes
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Format = DW_EH_PE_sdata4;
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else {
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// 64 bit targets encode pointers in 4 bytes iff:
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// - code model is small OR
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// - code model is medium and we're emitting externally visible symbols
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// or any code symbols
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if (CM == CodeModel::Small ||
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(CM == CodeModel::Medium && (Global ||
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Reason != DwarfEncoding::Data)))
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Format = DW_EH_PE_sdata4;
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else
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Format = DW_EH_PE_sdata8;
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}
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if (Global)
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Format |= DW_EH_PE_indirect;
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return (Format | DW_EH_PE_pcrel);
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} else {
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if (is64Bit &&
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(CM == CodeModel::Small ||
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(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
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return DW_EH_PE_udata4;
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else
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return DW_EH_PE_absptr;
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}
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}
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unsigned
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X86COFFTargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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bool Global) const {
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CodeModel::Model CM = TM.getCodeModel();
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bool is64Bit = TM.getSubtarget<X86Subtarget>().is64Bit();
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if (TM.getRelocationModel() == Reloc::PIC_) {
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unsigned Format = 0;
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if (!is64Bit)
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// 32 bit targets always encode pointers as 4 bytes
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Format = DW_EH_PE_sdata4;
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else {
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// 64 bit targets encode pointers in 4 bytes iff:
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// - code model is small OR
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// - code model is medium and we're emitting externally visible symbols
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// or any code symbols
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if (CM == CodeModel::Small ||
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(CM == CodeModel::Medium && (Global ||
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Reason != DwarfEncoding::Data)))
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Format = DW_EH_PE_sdata4;
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else
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Format = DW_EH_PE_sdata8;
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}
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if (Global)
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Format |= DW_EH_PE_indirect;
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return (Format | DW_EH_PE_pcrel);
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}
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if (is64Bit &&
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(CM == CodeModel::Small ||
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(CM == CodeModel::Medium && Reason != DwarfEncoding::Data)))
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return DW_EH_PE_udata4;
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return DW_EH_PE_absptr;
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}
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X86WinTargetAsmInfo::X86WinTargetAsmInfo(const X86TargetMachine &TM):
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X86TargetAsmInfo<TargetAsmInfo>(TM) {
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GlobalPrefix = "_";
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CommentString = ";";
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InlineAsmStart = "; InlineAsm Start";
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InlineAsmEnd = "; InlineAsm End";
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PrivateGlobalPrefix = "$";
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AlignDirective = "\tALIGN\t";
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ZeroDirective = "\tdb\t";
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ZeroDirectiveSuffix = " dup(0)";
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AsciiDirective = "\tdb\t";
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AscizDirective = 0;
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Data8bitsDirective = "\tdb\t";
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Data16bitsDirective = "\tdw\t";
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Data32bitsDirective = "\tdd\t";
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Data64bitsDirective = "\tdq\t";
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HasDotTypeDotSizeDirective = false;
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HasSingleParameterDotFile = false;
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AlignmentIsInBytes = true;
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JumpTableDataSection = NULL;
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SwitchToSectionDirective = "";
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TextSectionStartSuffix = "\tSEGMENT PARA 'CODE'";
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DataSectionStartSuffix = "\tSEGMENT PARA 'DATA'";
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SectionEndDirectiveSuffix = "\tends\n";
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}
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// Instantiate default implementation.
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TEMPLATE_INSTANTIATION(class X86TargetAsmInfo<TargetAsmInfo>);
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