mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-30 17:33:24 +00:00
c1f4a4b264
I've been comparing the object file output of LLVM's integrated assembler against the external assembler on PowerPC, and one area where differences still remain are in DWARF sections. In particular, the GNU assembler generates .debug_frame and .debug_line sections using a code alignment factor of 4, since all PowerPC instructions have size 4 and must be aligned to a multiple of 4. However, current MC code hard-codes a code alignment factor of 1. This patch changes this by adding a "minimum instruction alignment" data element to MCAsmInfo and using this as code alignment factor. This requires passing a MCContext into MCDwarfLineAddr::Encode and MCDwarfLineAddr::EncodeAdvanceLoc. Note that one caller, MCDwarfLineAddr::Write, didn't actually have that information available. However, it turns out that this routine is in fact never used in the whole code base, so the patch simply removes it. If it turns out to be needed again at a later time, it could be re-added with an updated interface. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183834 91177308-0d34-0410-b5e6-96231b3b80d8
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
//===-- PPCMCAsmInfo.cpp - PPC asm properties -----------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the declarations of the MCAsmInfoDarwin properties.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PPCMCAsmInfo.h"
|
|
using namespace llvm;
|
|
|
|
void PPCMCAsmInfoDarwin::anchor() { }
|
|
|
|
PPCMCAsmInfoDarwin::PPCMCAsmInfoDarwin(bool is64Bit) {
|
|
if (is64Bit) {
|
|
PointerSize = CalleeSaveStackSlotSize = 8;
|
|
}
|
|
IsLittleEndian = false;
|
|
|
|
PCSymbol = ".";
|
|
CommentString = ";";
|
|
ExceptionsType = ExceptionHandling::DwarfCFI;
|
|
|
|
if (!is64Bit)
|
|
Data64bitsDirective = 0; // We can't emit a 64-bit unit in PPC32 mode.
|
|
|
|
AssemblerDialect = 1; // New-Style mnemonics.
|
|
SupportsDebugInformation= true; // Debug information.
|
|
}
|
|
|
|
void PPCLinuxMCAsmInfo::anchor() { }
|
|
|
|
PPCLinuxMCAsmInfo::PPCLinuxMCAsmInfo(bool is64Bit) {
|
|
if (is64Bit) {
|
|
PointerSize = CalleeSaveStackSlotSize = 8;
|
|
}
|
|
IsLittleEndian = false;
|
|
|
|
// ".comm align is in bytes but .align is pow-2."
|
|
AlignmentIsInBytes = false;
|
|
|
|
CommentString = "#";
|
|
GlobalPrefix = "";
|
|
PrivateGlobalPrefix = ".L";
|
|
WeakRefDirective = "\t.weak\t";
|
|
|
|
// Uses '.section' before '.bss' directive
|
|
UsesELFSectionDirectiveForBSS = true;
|
|
|
|
// Debug Information
|
|
SupportsDebugInformation = true;
|
|
|
|
PCSymbol = ".";
|
|
|
|
// Set up DWARF directives
|
|
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
|
|
MinInstAlignment = 4;
|
|
|
|
// Exceptions handling
|
|
ExceptionsType = ExceptionHandling::DwarfCFI;
|
|
|
|
ZeroDirective = "\t.space\t";
|
|
Data64bitsDirective = is64Bit ? "\t.quad\t" : 0;
|
|
AssemblerDialect = 0; // Old-Style mnemonics.
|
|
}
|
|
|