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https://github.com/c64scene-ar/llvm-6502.git
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47eac58333
As a first step towards real little-endian code generation, this patch changes the PowerPC MC layer to actually generate little-endian object files. This involves passing the little-endian flag through the various layers, including down to createELFObjectWriter so we actually get basic little-endian ELF objects, emitting instructions in little-endian order, and handling fixups and relocations as appropriate for little-endian. The bulk of the patch is to update most test cases in test/MC/PowerPC to verify both big- and little-endian encodings. (The only test cases *not* updated are those that create actual big-endian ABI code, like the TLS tests.) Note that while the object files are now little-endian, the generated code itself is not yet updated, in particular, it still does not adhere to the ELFv2 ABI. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204634 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
//===-- PPCMCAsmInfo.cpp - PPC 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 MCAsmInfoDarwin properties.
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//
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//===----------------------------------------------------------------------===//
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#include "PPCMCAsmInfo.h"
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#include "llvm/ADT/Triple.h"
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using namespace llvm;
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void PPCMCAsmInfoDarwin::anchor() { }
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PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit, const Triple& T) {
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if (is64Bit) {
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PointerSize = CalleeSaveStackSlotSize = 8;
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}
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IsLittleEndian = false;
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CommentString = ";";
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ExceptionsType = ExceptionHandling::DwarfCFI;
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if (!is64Bit)
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Data64bitsDirective = 0; // We can't emit a 64-bit unit in PPC32 mode.
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AssemblerDialect = 1; // New-Style mnemonics.
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SupportsDebugInformation= true; // Debug information.
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// The installed assembler for OSX < 10.6 lacks some directives.
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// FIXME: this should really be a check on the assembler characteristics
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// rather than OS version
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if (T.isMacOSX() && T.isMacOSXVersionLT(10, 6))
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HasWeakDefCanBeHiddenDirective = false;
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UseIntegratedAssembler = true;
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}
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void PPCLinuxMCAsmInfo::anchor() { }
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PPCLinuxMCAsmInfo::PPCLinuxMCAsmInfo(bool is64Bit, const Triple& T) {
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if (is64Bit) {
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PointerSize = CalleeSaveStackSlotSize = 8;
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}
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IsLittleEndian = T.getArch() == Triple::ppc64le;
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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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// Uses '.section' before '.bss' directive
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UsesELFSectionDirectiveForBSS = true;
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// Debug Information
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SupportsDebugInformation = true;
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DollarIsPC = true;
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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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MinInstAlignment = 4;
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// Exceptions handling
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ExceptionsType = ExceptionHandling::DwarfCFI;
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ZeroDirective = "\t.space\t";
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Data64bitsDirective = is64Bit ? "\t.quad\t" : 0;
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AssemblerDialect = 1; // New-Style mnemonics.
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if (T.getOS() == llvm::Triple::FreeBSD ||
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(T.getOS() == llvm::Triple::NetBSD && !is64Bit) ||
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(T.getOS() == llvm::Triple::OpenBSD && !is64Bit))
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UseIntegratedAssembler = true;
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}
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