mirror of
https://github.com/RPCS3/llvm-mirror.git
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3fe0bbd6fb
llvm-svn: 36585
140 lines
5.1 KiB
C++
140 lines
5.1 KiB
C++
//===-- ARMTargetAsmInfo.cpp - ARM 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 was developed by James M. Laskey and is distributed under the
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// University of Illinois Open Source 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 ARMTargetAsmInfo properties.
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//
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//===----------------------------------------------------------------------===//
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#include "ARMTargetAsmInfo.h"
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#include "ARMTargetMachine.h"
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#include <cstring>
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#include <cctype>
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using namespace llvm;
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ARMTargetAsmInfo::ARMTargetAsmInfo(const ARMTargetMachine &TM) {
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const ARMSubtarget *Subtarget = &TM.getSubtarget<ARMSubtarget>();
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if (Subtarget->isTargetDarwin()) {
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GlobalPrefix = "_";
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PrivateGlobalPrefix = "L";
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BSSSection = 0; // no BSS section.
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ZeroFillDirective = "\t.zerofill\t"; // Uses .zerofill
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SetDirective = "\t.set";
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WeakRefDirective = "\t.weak_reference\t";
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HiddenDirective = "\t.private_extern\t";
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ProtectedDirective = NULL;
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JumpTableDataSection = ".const";
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CStringSection = "\t.cstring";
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FourByteConstantSection = "\t.literal4\n";
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EightByteConstantSection = "\t.literal8\n";
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ReadOnlySection = "\t.const\n";
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HasDotTypeDotSizeDirective = false;
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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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// 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.
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if (TM.getRelocationModel() != Reloc::PIC_) {
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// Emit a local label that is preserved until the linker runs.
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JumpTableSpecialLabelPrefix = "l";
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}
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NeedsSet = true;
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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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DwarfMacInfoSection = ".section __DWARF,__debug_macinfo,regular,debug";
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} else {
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PrivateGlobalPrefix = ".L";
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WeakRefDirective = "\t.weak\t";
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if (Subtarget->isAAPCS_ABI()) {
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StaticCtorsSection = "\t.section .init_array,\"aw\",%init_array";
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StaticDtorsSection = "\t.section .fini_array,\"aw\",%fini_array";
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} else {
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StaticCtorsSection = "\t.section .ctors,\"aw\",%progbits";
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StaticDtorsSection = "\t.section .dtors,\"aw\",%progbits";
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}
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TLSDataSection = "\t.section .tdata,\"awT\",%progbits";
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TLSBSSSection = "\t.section .tbss,\"awT\",%nobits";
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}
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ZeroDirective = "\t.space\t";
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AlignmentIsInBytes = false;
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Data64bitsDirective = 0;
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CommentString = "@";
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DataSection = "\t.data";
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ConstantPoolSection = "\t.text\n";
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COMMDirectiveTakesAlignment = false;
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InlineAsmStart = "@ InlineAsm Start";
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InlineAsmEnd = "@ InlineAsm End";
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LCOMMDirective = "\t.lcomm\t";
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isThumb = Subtarget->isThumb();
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}
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/// ARM-specific version of TargetAsmInfo::getInlineAsmLength.
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unsigned ARMTargetAsmInfo::getInlineAsmLength(const char *Str) const {
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// Count the number of bytes in the asm.
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bool atInsnStart = true;
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unsigned Length = 0;
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for (; *Str; ++Str) {
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if (atInsnStart) {
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// Skip whitespace
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while (*Str && isspace(*Str) && *Str != '\n')
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Str++;
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// Skip label
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for (const char* p = Str; *p && !isspace(*p); p++)
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if (*p == ':') {
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Str = p+1;
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break;
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}
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// Ignore everything from comment char(s) to EOL
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if (strncmp(Str, CommentString, strlen(CommentString))==-0)
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atInsnStart = false;
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else {
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// An instruction
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atInsnStart = false;
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if (isThumb) {
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// BL and BLX <non-reg> are 4 bytes, all others 2.
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if ((*Str=='b' || *Str=='B') &&
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(*(Str+1)=='l' || *(Str+1)=='L')) {
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if (*(Str+2)=='x' || *(Str+2)=='X') {
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const char* p = Str+3;
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while (*p && isspace(*p))
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p++;
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if (*p == 'r' || *p=='R')
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Length += 2; // BLX reg
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else
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Length += 4; // BLX non-reg
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}
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else
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Length += 4; // BL
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} else
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Length += 2; // Thumb anything else
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}
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else
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Length += 4; // ARM
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}
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}
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if (*Str == '\n' || *Str == SeparatorChar)
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atInsnStart = true;
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}
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return Length;
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}
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