c2b701408e
This matches the structure used on X86 and ARM. This requires a little bit of duplication of the parts that are equal in both AArch64 COFF variants though. Before SVN r335286, these classes didn't add anything that MCAsmInfoCOFF didn't, but now they do. This makes AArch64 match X86 in how comdat is used for float constants for MinGW. Differential Revision: https://reviews.llvm.org/D49637 llvm-svn: 337755
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
//===-- AArch64MCAsmInfo.cpp - AArch64 asm properties ---------------------===//
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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 AArch64MCAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "AArch64MCAsmInfo.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/Support/CommandLine.h"
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using namespace llvm;
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enum AsmWriterVariantTy {
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Default = -1,
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Generic = 0,
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Apple = 1
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};
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static cl::opt<AsmWriterVariantTy> AsmWriterVariant(
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"aarch64-neon-syntax", cl::init(Default),
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cl::desc("Choose style of NEON code to emit from AArch64 backend:"),
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cl::values(clEnumValN(Generic, "generic", "Emit generic NEON assembly"),
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clEnumValN(Apple, "apple", "Emit Apple-style NEON assembly")));
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AArch64MCAsmInfoDarwin::AArch64MCAsmInfoDarwin() {
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// We prefer NEON instructions to be printed in the short, Apple-specific
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// form when targeting Darwin.
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AssemblerDialect = AsmWriterVariant == Default ? Apple : AsmWriterVariant;
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PrivateGlobalPrefix = "L";
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PrivateLabelPrefix = "L";
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SeparatorString = "%%";
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CommentString = ";";
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CodePointerSize = CalleeSaveStackSlotSize = 8;
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AlignmentIsInBytes = false;
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UsesELFSectionDirectiveForBSS = true;
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SupportsDebugInformation = true;
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UseDataRegionDirectives = true;
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ExceptionsType = ExceptionHandling::DwarfCFI;
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}
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const MCExpr *AArch64MCAsmInfoDarwin::getExprForPersonalitySymbol(
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const MCSymbol *Sym, unsigned Encoding, MCStreamer &Streamer) const {
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// On Darwin, we can reference dwarf symbols with foo@GOT-., which
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// is an indirect pc-relative reference. The default implementation
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// won't reference using the GOT, so we need this target-specific
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// version.
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MCContext &Context = Streamer.getContext();
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const MCExpr *Res =
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MCSymbolRefExpr::create(Sym, MCSymbolRefExpr::VK_GOT, Context);
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MCSymbol *PCSym = Context.createTempSymbol();
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Streamer.EmitLabel(PCSym);
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const MCExpr *PC = MCSymbolRefExpr::create(PCSym, Context);
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return MCBinaryExpr::createSub(Res, PC, Context);
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}
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AArch64MCAsmInfoELF::AArch64MCAsmInfoELF(const Triple &T) {
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if (T.getArch() == Triple::aarch64_be)
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IsLittleEndian = false;
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// We prefer NEON instructions to be printed in the generic form when
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// targeting ELF.
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AssemblerDialect = AsmWriterVariant == Default ? Generic : AsmWriterVariant;
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CodePointerSize = 8;
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// ".comm align is in bytes but .align is pow-2."
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AlignmentIsInBytes = false;
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CommentString = "//";
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PrivateGlobalPrefix = ".L";
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PrivateLabelPrefix = ".L";
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Code32Directive = ".code\t32";
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Data16bitsDirective = "\t.hword\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = "\t.xword\t";
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UseDataRegionDirectives = false;
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WeakRefDirective = "\t.weak\t";
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SupportsDebugInformation = true;
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// Exceptions handling
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ExceptionsType = ExceptionHandling::DwarfCFI;
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UseIntegratedAssembler = true;
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HasIdentDirective = true;
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}
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AArch64MCAsmInfoMicrosoftCOFF::AArch64MCAsmInfoMicrosoftCOFF() {
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PrivateGlobalPrefix = ".L";
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PrivateLabelPrefix = ".L";
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Data16bitsDirective = "\t.hword\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = "\t.xword\t";
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AlignmentIsInBytes = false;
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SupportsDebugInformation = true;
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CodePointerSize = 8;
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CommentString = ";";
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ExceptionsType = ExceptionHandling::WinEH;
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}
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AArch64MCAsmInfoGNUCOFF::AArch64MCAsmInfoGNUCOFF() {
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PrivateGlobalPrefix = ".L";
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PrivateLabelPrefix = ".L";
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Data16bitsDirective = "\t.hword\t";
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Data32bitsDirective = "\t.word\t";
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Data64bitsDirective = "\t.xword\t";
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AlignmentIsInBytes = false;
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SupportsDebugInformation = true;
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CodePointerSize = 8;
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CommentString = "//";
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ExceptionsType = ExceptionHandling::DwarfCFI;
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}
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