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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
102 lines
3.8 KiB
C++
102 lines
3.8 KiB
C++
//===-- DarwinTargetAsmInfo.cpp - Darwin 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 defines target asm properties related what form asm statements
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// should take in general on Darwin-based targets
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Function.h"
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#include "llvm/GlobalVariable.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/Mangler.h"
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#include "llvm/Target/DarwinTargetAsmInfo.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetData.h"
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using namespace llvm;
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DarwinTargetAsmInfo::DarwinTargetAsmInfo(const TargetMachine &TM)
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: TargetAsmInfo(TM) {
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// Common settings for all Darwin targets.
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// Syntax:
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GlobalPrefix = "_";
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PrivateGlobalPrefix = "L";
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LinkerPrivateGlobalPrefix = "l"; // Marker for some ObjC metadata
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NeedsSet = true;
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NeedsIndirectEncoding = true;
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AllowQuotesInName = true;
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HasSingleParameterDotFile = false;
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// In non-PIC modes, emit a special label before jump tables so that the
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// linker can perform more accurate dead code stripping. We do not check the
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// relocation model here since it can be overridden later.
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JumpTableSpecialLabelPrefix = "l";
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// Directives:
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WeakDefDirective = "\t.weak_definition ";
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WeakRefDirective = "\t.weak_reference ";
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HiddenDirective = "\t.private_extern ";
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// Sections:
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CStringSection = "\t.cstring";
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JumpTableDataSection = "\t.const";
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BSSSection = 0;
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if (TM.getRelocationModel() == Reloc::Static) {
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StaticCtorsSection = ".constructor";
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StaticDtorsSection = ".destructor";
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} else {
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StaticCtorsSection = ".mod_init_func";
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StaticDtorsSection = ".mod_term_func";
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}
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// _foo.eh symbols are currently always exported so that the linker knows
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// about them. This may not strictly be necessary on 10.6 and later, but it
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// doesn't hurt anything.
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Is_EHSymbolPrivate = false;
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DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
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DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
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DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
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DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
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DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
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DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
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DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
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DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
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DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
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DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
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DwarfMacroInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
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}
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/// emitUsedDirectiveFor - On Darwin, internally linked data beginning with
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/// the PrivateGlobalPrefix or the LinkerPrivateGlobalPrefix does not have the
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/// directive emitted (this occurs in ObjC metadata).
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bool DarwinTargetAsmInfo::emitUsedDirectiveFor(const GlobalValue* GV,
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Mangler *Mang) const {
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if (!GV) return false;
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// Check whether the mangled name has the "Private" or "LinkerPrivate" prefix.
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if (GV->hasLocalLinkage() && !isa<Function>(GV)) {
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// FIXME: ObjC metadata is currently emitted as internal symbols that have
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// \1L and \0l prefixes on them. Fix them to be Private/LinkerPrivate and
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// this horrible hack can go away.
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const std::string &Name = Mang->getMangledName(GV);
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if (Name[0] == 'L' || Name[0] == 'l')
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return false;
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}
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return true;
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}
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