mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
6994040a95
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40807 91177308-0d34-0410-b5e6-96231b3b80d8
284 lines
11 KiB
C++
284 lines
11 KiB
C++
//===-- X86TargetAsmInfo.cpp - X86 asm properties ---------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file was developed by James M. Laskey and is distributed under the
|
|
// University of Illinois Open Source License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains the declarations of the X86TargetAsmInfo properties.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "X86TargetAsmInfo.h"
|
|
#include "X86TargetMachine.h"
|
|
#include "X86Subtarget.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/InlineAsm.h"
|
|
#include "llvm/Instructions.h"
|
|
#include "llvm/Intrinsics.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/ADT/StringExtras.h"
|
|
using namespace llvm;
|
|
|
|
static const char* x86_asm_table[] = {"{si}", "S",
|
|
"{di}", "D",
|
|
"{ax}", "a",
|
|
"{cx}", "c",
|
|
"{memory}", "memory",
|
|
"{flags}", "",
|
|
"{dirflag}", "",
|
|
"{fpsr}", "",
|
|
"{cc}", "cc",
|
|
0,0};
|
|
|
|
X86TargetAsmInfo::X86TargetAsmInfo(const X86TargetMachine &TM) {
|
|
const X86Subtarget *Subtarget = &TM.getSubtarget<X86Subtarget>();
|
|
|
|
// FIXME - Should be simplified.
|
|
|
|
AsmTransCBE = x86_asm_table;
|
|
|
|
switch (Subtarget->TargetType) {
|
|
case X86Subtarget::isDarwin:
|
|
AlignmentIsInBytes = false;
|
|
GlobalPrefix = "_";
|
|
if (!Subtarget->is64Bit())
|
|
Data64bitsDirective = 0; // we can't emit a 64-bit unit
|
|
ZeroDirective = "\t.space\t"; // ".space N" emits N zeros.
|
|
PrivateGlobalPrefix = "L"; // Marker for constant pool idxs
|
|
BSSSection = 0; // no BSS section.
|
|
ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
|
|
ConstantPoolSection = "\t.const\n";
|
|
JumpTableDataSection = "\t.const\n";
|
|
CStringSection = "\t.cstring";
|
|
FourByteConstantSection = "\t.literal4\n";
|
|
EightByteConstantSection = "\t.literal8\n";
|
|
if (Subtarget->is64Bit())
|
|
SixteenByteConstantSection = "\t.literal16\n";
|
|
ReadOnlySection = "\t.const\n";
|
|
LCOMMDirective = "\t.lcomm\t";
|
|
COMMDirectiveTakesAlignment = false;
|
|
HasDotTypeDotSizeDirective = false;
|
|
if (TM.getRelocationModel() == Reloc::Static) {
|
|
StaticCtorsSection = ".constructor";
|
|
StaticDtorsSection = ".destructor";
|
|
} else {
|
|
StaticCtorsSection = ".mod_init_func";
|
|
StaticDtorsSection = ".mod_term_func";
|
|
}
|
|
InlineAsmStart = "# InlineAsm Start";
|
|
InlineAsmEnd = "# InlineAsm End";
|
|
SetDirective = "\t.set";
|
|
UsedDirective = "\t.no_dead_strip\t";
|
|
WeakRefDirective = "\t.weak_reference\t";
|
|
HiddenDirective = "\t.private_extern\t";
|
|
|
|
// In non-PIC modes, emit a special label before jump tables so that the
|
|
// linker can perform more accurate dead code stripping.
|
|
if (TM.getRelocationModel() != Reloc::PIC_) {
|
|
// Emit a local label that is preserved until the linker runs.
|
|
JumpTableSpecialLabelPrefix = "l";
|
|
}
|
|
|
|
SupportsDebugInformation = true;
|
|
NeedsSet = true;
|
|
DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
|
|
DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
|
|
DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
|
|
DwarfFrameSection = ".section __DWARF,__debug_frame,regular,debug";
|
|
DwarfPubNamesSection = ".section __DWARF,__debug_pubnames,regular,debug";
|
|
DwarfPubTypesSection = ".section __DWARF,__debug_pubtypes,regular,debug";
|
|
DwarfStrSection = ".section __DWARF,__debug_str,regular,debug";
|
|
DwarfLocSection = ".section __DWARF,__debug_loc,regular,debug";
|
|
DwarfARangesSection = ".section __DWARF,__debug_aranges,regular,debug";
|
|
DwarfRangesSection = ".section __DWARF,__debug_ranges,regular,debug";
|
|
DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
|
|
break;
|
|
|
|
case X86Subtarget::isELF:
|
|
ReadOnlySection = "\t.section\t.rodata";
|
|
FourByteConstantSection = "\t.section\t.rodata.cst4,\"aM\",@progbits,4";
|
|
EightByteConstantSection = "\t.section\t.rodata.cst8,\"aM\",@progbits,8";
|
|
SixteenByteConstantSection = "\t.section\t.rodata.cst16,\"aM\",@progbits,16";
|
|
CStringSection = "\t.section\t.rodata.str1.1,\"aMS\",@progbits,1";
|
|
PrivateGlobalPrefix = ".L";
|
|
WeakRefDirective = "\t.weak\t";
|
|
SetDirective = "\t.set\t";
|
|
PCSymbol = ".";
|
|
|
|
// Set up DWARF directives
|
|
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
|
|
|
|
// Debug Information
|
|
AbsoluteDebugSectionOffsets = true;
|
|
SupportsDebugInformation = true;
|
|
DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"\",@progbits";
|
|
DwarfInfoSection = "\t.section\t.debug_info,\"\",@progbits";
|
|
DwarfLineSection = "\t.section\t.debug_line,\"\",@progbits";
|
|
DwarfFrameSection = "\t.section\t.debug_frame,\"\",@progbits";
|
|
DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"\",@progbits";
|
|
DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"\",@progbits";
|
|
DwarfStrSection = "\t.section\t.debug_str,\"\",@progbits";
|
|
DwarfLocSection = "\t.section\t.debug_loc,\"\",@progbits";
|
|
DwarfARangesSection = "\t.section\t.debug_aranges,\"\",@progbits";
|
|
DwarfRangesSection = "\t.section\t.debug_ranges,\"\",@progbits";
|
|
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"\",@progbits";
|
|
|
|
// Exceptions handling
|
|
if (!Subtarget->is64Bit())
|
|
SupportsExceptionHandling = true;
|
|
AbsoluteEHSectionOffsets = false;
|
|
DwarfEHFrameSection = "\t.section\t.eh_frame,\"aw\",@progbits";
|
|
DwarfExceptionSection = "\t.section\t.gcc_except_table,\"a\",@progbits";
|
|
break;
|
|
|
|
case X86Subtarget::isCygwin:
|
|
case X86Subtarget::isMingw:
|
|
GlobalPrefix = "_";
|
|
LCOMMDirective = "\t.lcomm\t";
|
|
COMMDirectiveTakesAlignment = false;
|
|
HasDotTypeDotSizeDirective = false;
|
|
StaticCtorsSection = "\t.section .ctors,\"aw\"";
|
|
StaticDtorsSection = "\t.section .dtors,\"aw\"";
|
|
HiddenDirective = NULL;
|
|
PrivateGlobalPrefix = "L"; // Prefix for private global symbols
|
|
WeakRefDirective = "\t.weak\t";
|
|
SetDirective = "\t.set\t";
|
|
|
|
// Set up DWARF directives
|
|
HasLEB128 = true; // Target asm supports leb128 directives (little-endian)
|
|
AbsoluteDebugSectionOffsets = true;
|
|
AbsoluteEHSectionOffsets = false;
|
|
SupportsDebugInformation = true;
|
|
DwarfSectionOffsetDirective = "\t.secrel32\t";
|
|
DwarfAbbrevSection = "\t.section\t.debug_abbrev,\"dr\"";
|
|
DwarfInfoSection = "\t.section\t.debug_info,\"dr\"";
|
|
DwarfLineSection = "\t.section\t.debug_line,\"dr\"";
|
|
DwarfFrameSection = "\t.section\t.debug_frame,\"dr\"";
|
|
DwarfPubNamesSection ="\t.section\t.debug_pubnames,\"dr\"";
|
|
DwarfPubTypesSection ="\t.section\t.debug_pubtypes,\"dr\"";
|
|
DwarfStrSection = "\t.section\t.debug_str,\"dr\"";
|
|
DwarfLocSection = "\t.section\t.debug_loc,\"dr\"";
|
|
DwarfARangesSection = "\t.section\t.debug_aranges,\"dr\"";
|
|
DwarfRangesSection = "\t.section\t.debug_ranges,\"dr\"";
|
|
DwarfMacInfoSection = "\t.section\t.debug_macinfo,\"dr\"";
|
|
break;
|
|
|
|
case X86Subtarget::isWindows:
|
|
GlobalPrefix = "_";
|
|
HasDotTypeDotSizeDirective = false;
|
|
break;
|
|
|
|
default: break;
|
|
}
|
|
|
|
if (Subtarget->isFlavorIntel()) {
|
|
GlobalPrefix = "_";
|
|
CommentString = ";";
|
|
|
|
PrivateGlobalPrefix = "$";
|
|
AlignDirective = "\talign\t";
|
|
ZeroDirective = "\tdb\t";
|
|
ZeroDirectiveSuffix = " dup(0)";
|
|
AsciiDirective = "\tdb\t";
|
|
AscizDirective = 0;
|
|
Data8bitsDirective = "\tdb\t";
|
|
Data16bitsDirective = "\tdw\t";
|
|
Data32bitsDirective = "\tdd\t";
|
|
Data64bitsDirective = "\tdq\t";
|
|
HasDotTypeDotSizeDirective = false;
|
|
|
|
TextSection = "_text";
|
|
DataSection = "_data";
|
|
JumpTableDataSection = NULL;
|
|
SwitchToSectionDirective = "";
|
|
TextSectionStartSuffix = "\tsegment 'CODE'";
|
|
DataSectionStartSuffix = "\tsegment 'DATA'";
|
|
SectionEndDirectiveSuffix = "\tends\n";
|
|
}
|
|
|
|
AssemblerDialect = Subtarget->getAsmFlavor();
|
|
}
|
|
|
|
bool X86TargetAsmInfo::LowerToBSwap(CallInst *CI) const {
|
|
// FIXME: this should verify that we are targetting a 486 or better. If not,
|
|
// we will turn this bswap into something that will be lowered to logical ops
|
|
// instead of emitting the bswap asm. For now, we don't support 486 or lower
|
|
// so don't worry about this.
|
|
|
|
// Verify this is a simple bswap.
|
|
if (CI->getNumOperands() != 2 ||
|
|
CI->getType() != CI->getOperand(1)->getType() ||
|
|
!CI->getType()->isInteger())
|
|
return false;
|
|
|
|
const IntegerType *Ty = dyn_cast<IntegerType>(CI->getType());
|
|
if (!Ty || Ty->getBitWidth() % 16 != 0)
|
|
return false;
|
|
|
|
// Okay, we can do this xform, do so now.
|
|
const Type *Tys[] = { Ty };
|
|
Module *M = CI->getParent()->getParent()->getParent();
|
|
Constant *Int = Intrinsic::getDeclaration(M, Intrinsic::bswap, Tys, 1);
|
|
|
|
Value *Op = CI->getOperand(1);
|
|
Op = new CallInst(Int, Op, CI->getName(), CI);
|
|
|
|
CI->replaceAllUsesWith(Op);
|
|
CI->eraseFromParent();
|
|
return true;
|
|
}
|
|
|
|
|
|
bool X86TargetAsmInfo::ExpandInlineAsm(CallInst *CI) const {
|
|
InlineAsm *IA = cast<InlineAsm>(CI->getCalledValue());
|
|
std::vector<InlineAsm::ConstraintInfo> Constraints = IA->ParseConstraints();
|
|
|
|
std::string AsmStr = IA->getAsmString();
|
|
|
|
// TODO: should remove alternatives from the asmstring: "foo {a|b}" -> "foo a"
|
|
std::vector<std::string> AsmPieces;
|
|
SplitString(AsmStr, AsmPieces, "\n"); // ; as separator?
|
|
|
|
switch (AsmPieces.size()) {
|
|
default: return false;
|
|
case 1:
|
|
AsmStr = AsmPieces[0];
|
|
AsmPieces.clear();
|
|
SplitString(AsmStr, AsmPieces, " \t"); // Split with whitespace.
|
|
|
|
// bswap $0
|
|
if (AsmPieces.size() == 2 &&
|
|
AsmPieces[0] == "bswap" && AsmPieces[1] == "$0") {
|
|
// No need to check constraints, nothing other than the equivalent of
|
|
// "=r,0" would be valid here.
|
|
return LowerToBSwap(CI);
|
|
}
|
|
break;
|
|
case 3:
|
|
if (CI->getType() == Type::Int64Ty && Constraints.size() >= 2 &&
|
|
Constraints[0].Codes.size() == 1 && Constraints[0].Codes[0] == "A" &&
|
|
Constraints[1].Codes.size() == 1 && Constraints[1].Codes[0] == "0") {
|
|
// bswap %eax / bswap %edx / xchgl %eax, %edx -> llvm.bswap.i64
|
|
std::vector<std::string> Words;
|
|
SplitString(AsmPieces[0], Words, " \t");
|
|
if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%eax") {
|
|
Words.clear();
|
|
SplitString(AsmPieces[1], Words, " \t");
|
|
if (Words.size() == 2 && Words[0] == "bswap" && Words[1] == "%edx") {
|
|
Words.clear();
|
|
SplitString(AsmPieces[2], Words, " \t,");
|
|
if (Words.size() == 3 && Words[0] == "xchgl" && Words[1] == "%eax" &&
|
|
Words[2] == "%edx") {
|
|
return LowerToBSwap(CI);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return false;
|
|
}
|