2006-09-06 19:21:41 +00:00
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//===-- TargetAsmInfo.cpp - Asm Info ---------------------------------------==//
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2006-09-06 18:35:33 +00:00
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//
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// The LLVM Compiler Infrastructure
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//
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2007-12-29 20:36:04 +00:00
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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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2006-09-06 18:35:33 +00:00
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines target asm properties related what form asm statements
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// should take.
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//
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//===----------------------------------------------------------------------===//
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2008-06-28 13:45:57 +00:00
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#include "llvm/Constants.h"
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2009-01-27 22:29:24 +00:00
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#include "llvm/DerivedTypes.h"
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2008-06-28 13:45:57 +00:00
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#include "llvm/GlobalVariable.h"
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#include "llvm/Function.h"
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#include "llvm/Module.h"
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#include "llvm/Type.h"
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2006-09-06 18:35:33 +00:00
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#include "llvm/Target/TargetAsmInfo.h"
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2009-07-26 06:11:33 +00:00
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#include "llvm/Target/TargetData.h"
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2009-03-29 17:13:49 +00:00
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#include "llvm/Target/TargetMachine.h"
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2008-06-28 13:45:57 +00:00
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#include "llvm/Target/TargetOptions.h"
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2008-02-27 23:33:50 +00:00
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#include "llvm/Support/Dwarf.h"
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2009-07-11 20:10:48 +00:00
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#include "llvm/Support/ErrorHandling.h"
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2007-04-23 20:00:17 +00:00
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#include <cctype>
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#include <cstring>
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2006-09-06 18:35:33 +00:00
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using namespace llvm;
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2009-07-24 20:14:10 +00:00
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TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm) : TM(tm) {
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2008-09-25 21:00:33 +00:00
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BSSSection = "\t.bss";
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BSSSection_ = 0;
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ReadOnlySection = 0;
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TLSDataSection = 0;
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TLSBSSSection = 0;
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ZeroFillDirective = 0;
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NonexecutableStackDirective = 0;
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NeedsSet = false;
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MaxInstLength = 4;
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PCSymbol = "$";
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SeparatorChar = ';';
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2009-07-13 20:25:48 +00:00
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CommentColumn = 60;
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2008-09-25 21:00:33 +00:00
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CommentString = "#";
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2009-07-20 22:02:59 +00:00
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FirstOperandColumn = 0;
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MaxOperandLength = 0;
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2008-09-25 21:00:33 +00:00
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GlobalPrefix = "";
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PrivateGlobalPrefix = ".";
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2009-07-21 17:30:51 +00:00
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LinkerPrivateGlobalPrefix = "";
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2008-09-25 21:00:33 +00:00
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JumpTableSpecialLabelPrefix = 0;
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GlobalVarAddrPrefix = "";
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GlobalVarAddrSuffix = "";
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FunctionAddrPrefix = "";
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FunctionAddrSuffix = "";
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PersonalityPrefix = "";
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PersonalitySuffix = "";
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NeedsIndirectEncoding = false;
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InlineAsmStart = "#APP";
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InlineAsmEnd = "#NO_APP";
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AssemblerDialect = 0;
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2009-06-18 23:41:35 +00:00
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AllowQuotesInName = false;
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2008-09-25 21:00:33 +00:00
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ZeroDirective = "\t.zero\t";
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ZeroDirectiveSuffix = 0;
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AsciiDirective = "\t.ascii\t";
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AscizDirective = "\t.asciz\t";
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Data8bitsDirective = "\t.byte\t";
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Data16bitsDirective = "\t.short\t";
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Data32bitsDirective = "\t.long\t";
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Data64bitsDirective = "\t.quad\t";
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AlignDirective = "\t.align\t";
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AlignmentIsInBytes = true;
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TextAlignFillValue = 0;
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SwitchToSectionDirective = "\t.section\t";
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TextSectionStartSuffix = "";
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DataSectionStartSuffix = "";
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SectionEndDirectiveSuffix = 0;
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ConstantPoolSection = "\t.section .rodata";
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JumpTableDataSection = "\t.section .rodata";
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JumpTableDirective = 0;
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CStringSection = 0;
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CStringSection_ = 0;
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// FIXME: Flags are ELFish - replace with normal section stuff.
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StaticCtorsSection = "\t.section .ctors,\"aw\",@progbits";
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StaticDtorsSection = "\t.section .dtors,\"aw\",@progbits";
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GlobalDirective = "\t.globl\t";
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SetDirective = 0;
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LCOMMDirective = 0;
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COMMDirective = "\t.comm\t";
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COMMDirectiveTakesAlignment = true;
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HasDotTypeDotSizeDirective = true;
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2008-12-03 11:01:37 +00:00
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HasSingleParameterDotFile = true;
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2008-09-25 21:00:33 +00:00
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UsedDirective = 0;
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WeakRefDirective = 0;
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WeakDefDirective = 0;
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// FIXME: These are ELFish - move to ELFTAI.
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HiddenDirective = "\t.hidden\t";
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ProtectedDirective = "\t.protected\t";
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AbsoluteDebugSectionOffsets = false;
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AbsoluteEHSectionOffsets = false;
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HasLEB128 = false;
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HasDotLocAndDotFile = false;
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SupportsDebugInformation = false;
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SupportsExceptionHandling = false;
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DwarfRequiresFrameSection = true;
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2009-04-13 17:02:03 +00:00
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DwarfUsesInlineInfoSection = false;
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2009-07-17 20:46:40 +00:00
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Is_EHSymbolPrivate = true;
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2008-09-25 21:00:33 +00:00
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GlobalEHDirective = 0;
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SupportsWeakOmittedEHFrame = true;
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DwarfSectionOffsetDirective = 0;
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DwarfAbbrevSection = ".debug_abbrev";
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DwarfInfoSection = ".debug_info";
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DwarfLineSection = ".debug_line";
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DwarfFrameSection = ".debug_frame";
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DwarfPubNamesSection = ".debug_pubnames";
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DwarfPubTypesSection = ".debug_pubtypes";
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2009-04-13 17:02:03 +00:00
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DwarfDebugInlineSection = ".debug_inlined";
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2008-09-25 21:00:33 +00:00
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DwarfStrSection = ".debug_str";
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DwarfLocSection = ".debug_loc";
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DwarfARangesSection = ".debug_aranges";
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DwarfRangesSection = ".debug_ranges";
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2009-06-18 23:31:37 +00:00
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DwarfMacroInfoSection = ".debug_macinfo";
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2008-09-25 21:00:33 +00:00
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DwarfEHFrameSection = ".eh_frame";
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DwarfExceptionSection = ".gcc_except_table";
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AsmTransCBE = 0;
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2008-09-24 22:15:21 +00:00
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TextSection = getUnnamedSection("\t.text", SectionFlags::Code);
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2009-07-25 18:57:34 +00:00
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DataSection = getUnnamedSection("\t.data", SectionFlags::Writable);
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2006-10-13 17:50:07 +00:00
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}
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2006-10-05 00:35:16 +00:00
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TargetAsmInfo::~TargetAsmInfo() {
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}
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2006-10-13 17:50:07 +00:00
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/// Measure the specified inline asm to determine an approximation of its
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/// length.
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2007-04-23 20:00:17 +00:00
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/// Comments (which run till the next SeparatorChar or newline) do not
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/// count as an instruction.
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/// Any other non-whitespace text is considered an instruction, with
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/// multiple instructions separated by SeparatorChar or newlines.
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/// Variable-length instructions are not handled here; this function
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/// may be overloaded in the target code to do that.
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2006-10-13 17:50:07 +00:00
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unsigned TargetAsmInfo::getInlineAsmLength(const char *Str) const {
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// Count the number of instructions in the asm.
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2007-04-23 20:00:17 +00:00
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bool atInsnStart = true;
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unsigned Length = 0;
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2006-10-13 17:50:07 +00:00
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for (; *Str; ++Str) {
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if (*Str == '\n' || *Str == SeparatorChar)
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2007-04-23 20:00:17 +00:00
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atInsnStart = true;
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if (atInsnStart && !isspace(*Str)) {
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Length += MaxInstLength;
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atInsnStart = false;
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}
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if (atInsnStart && strncmp(Str, CommentString, strlen(CommentString))==0)
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atInsnStart = false;
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2006-10-13 17:50:07 +00:00
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}
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2007-04-23 20:00:17 +00:00
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return Length;
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2006-10-13 17:50:07 +00:00
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}
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2007-03-07 02:47:57 +00:00
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2008-02-29 22:09:08 +00:00
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unsigned TargetAsmInfo::PreferredEHDataFormat(DwarfEncoding::Target Reason,
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2008-02-27 23:33:50 +00:00
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bool Global) const {
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return dwarf::DW_EH_PE_absptr;
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}
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2008-06-28 13:45:57 +00:00
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static bool isSuitableForBSS(const GlobalVariable *GV) {
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Constant *C = GV->getInitializer();
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2009-07-25 18:57:34 +00:00
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// Must have zero initializer.
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if (!C->isNullValue())
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return false;
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// Leave constant zeros in readonly constant sections, so they can be shared.
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if (GV->isConstant())
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return false;
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// If the global has an explicit section specified, don't put it in BSS.
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if (!GV->getSection().empty())
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return false;
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2009-07-25 23:21:55 +00:00
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// If -nozero-initialized-in-bss is specified, don't ever use BSS.
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if (NoZerosInBSS)
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return false;
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// Otherwise, put it in BSS!
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return true;
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2008-06-28 13:45:57 +00:00
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}
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2009-07-13 21:27:19 +00:00
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static bool isConstantString(const Constant *C) {
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2009-01-27 22:29:24 +00:00
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// First check: is we have constant array of i8 terminated with zero
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const ConstantArray *CVA = dyn_cast<ConstantArray>(C);
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// Check, if initializer is a null-terminated string
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2009-07-13 21:27:19 +00:00
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if (CVA && CVA->isCString())
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2009-01-27 22:29:24 +00:00
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return true;
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// Another possibility: [1 x i8] zeroinitializer
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2009-07-24 20:14:10 +00:00
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if (isa<ConstantAggregateZero>(C))
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if (const ArrayType *Ty = dyn_cast<ArrayType>(C->getType()))
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2009-01-27 22:29:24 +00:00
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return (Ty->getElementType() == Type::Int8Ty &&
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Ty->getNumElements() == 1);
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return false;
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}
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2009-07-24 16:46:50 +00:00
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static unsigned SectionFlagsForGlobal(const GlobalValue *GV,
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2009-07-25 23:21:55 +00:00
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SectionKind Kind) {
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2009-07-25 18:57:34 +00:00
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// Decode flags from global and section kind.
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2009-07-24 16:44:01 +00:00
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unsigned Flags = SectionFlags::None;
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if (GV->isWeakForLinker())
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Flags |= SectionFlags::Linkonce;
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2009-07-26 05:44:20 +00:00
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if (Kind.isBSS() || Kind.isThreadBSS())
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2009-07-25 18:57:34 +00:00
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Flags |= SectionFlags::BSS;
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2009-07-26 05:44:20 +00:00
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if (Kind.isThreadLocal())
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2009-07-25 18:57:34 +00:00
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Flags |= SectionFlags::TLS;
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2009-07-26 05:44:20 +00:00
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if (Kind.isText())
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2009-07-25 18:57:34 +00:00
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Flags |= SectionFlags::Code;
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2009-07-26 06:48:26 +00:00
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if (Kind.isWriteable())
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2009-07-25 18:57:34 +00:00
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Flags |= SectionFlags::Writable;
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2009-07-24 16:44:01 +00:00
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2009-07-24 16:50:24 +00:00
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return Flags;
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}
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2009-07-24 16:44:01 +00:00
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2009-07-25 23:21:55 +00:00
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static SectionKind SectionKindForGlobal(const GlobalValue *GV,
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2009-07-26 06:11:33 +00:00
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const TargetMachine &TM) {
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Reloc::Model ReloModel = TM.getRelocationModel();
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2009-07-26 07:00:12 +00:00
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bool isWeak = GV->isWeakForLinker();
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2009-07-26 06:11:33 +00:00
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2008-06-28 13:45:57 +00:00
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// Early exit - functions should be always in text sections.
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2009-07-24 16:53:52 +00:00
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const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV);
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if (GVar == 0)
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::Text, isWeak);
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2008-06-28 13:45:57 +00:00
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2009-07-26 06:34:33 +00:00
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// Handle thread-local data first.
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if (GVar->isThreadLocal()) {
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if (isSuitableForBSS(GVar))
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::ThreadBSS, isWeak);
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return SectionKind::get(SectionKind::ThreadData, isWeak);
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2009-07-26 06:34:33 +00:00
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}
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2008-06-28 13:45:57 +00:00
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2009-07-24 19:15:47 +00:00
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// Variable can be easily put to BSS section.
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if (isSuitableForBSS(GVar))
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::BSS, isWeak);
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2009-07-24 19:15:47 +00:00
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Constant *C = GVar->getInitializer();
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// If the global is marked constant, we can put it into a mergable section,
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// a mergable string section, or general .data if it contains relocations.
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if (GVar->isConstant()) {
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// If the initializer for the global contains something that requires a
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// relocation, then we may have to drop this into a wriable data section
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// even though it is marked const.
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switch (C->getRelocationInfo()) {
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default: llvm_unreachable("unknown relocation info kind");
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case Constant::NoRelocation:
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// If initializer is a null-terminated string, put it in a "cstring"
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// section if the target has it.
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2009-07-13 21:27:19 +00:00
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if (isConstantString(C))
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::MergeableCString, isWeak);
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2009-07-24 19:15:47 +00:00
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2009-07-26 06:11:33 +00:00
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// Otherwise, just drop it into a mergable constant section. If we have
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// a section for this size, use it, otherwise use the arbitrary sized
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// mergable section.
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switch (TM.getTargetData()->getTypeAllocSize(C->getType())) {
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2009-07-26 07:00:12 +00:00
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case 4: return SectionKind::get(SectionKind::MergeableConst4, isWeak);
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case 8: return SectionKind::get(SectionKind::MergeableConst8, isWeak);
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case 16: return SectionKind::get(SectionKind::MergeableConst16, isWeak);
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default: return SectionKind::get(SectionKind::MergeableConst, isWeak);
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2009-07-26 06:11:33 +00:00
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}
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2009-07-24 19:15:47 +00:00
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case Constant::LocalRelocation:
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// In static relocation model, the linker will resolve all addresses, so
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// the relocation entries will actually be constants by the time the app
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// starts up.
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2009-07-24 20:14:10 +00:00
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if (ReloModel == Reloc::Static)
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::ReadOnly, isWeak);
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2009-07-24 19:15:47 +00:00
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// Otherwise, the dynamic linker needs to fix it up, put it in the
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// writable data.rel.local section.
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::ReadOnlyWithRelLocal, isWeak);
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2009-07-24 19:15:47 +00:00
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case Constant::GlobalRelocations:
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// In static relocation model, the linker will resolve all addresses, so
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// the relocation entries will actually be constants by the time the app
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// starts up.
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2009-07-24 20:14:10 +00:00
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if (ReloModel == Reloc::Static)
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2009-07-26 07:00:12 +00:00
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return SectionKind::get(SectionKind::ReadOnly, isWeak);
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2009-07-24 19:15:47 +00:00
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// Otherwise, the dynamic linker needs to fix it up, put it in the
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|
|
// writable data.rel section.
|
2009-07-26 07:00:12 +00:00
|
|
|
return SectionKind::get(SectionKind::ReadOnlyWithRel, isWeak);
|
2008-06-28 13:45:57 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-07-24 19:15:47 +00:00
|
|
|
// Okay, this isn't a constant. If the initializer for the global is going
|
|
|
|
// to require a runtime relocation by the dynamic linker, put it into a more
|
|
|
|
// specific section to improve startup time of the app. This coalesces these
|
|
|
|
// globals together onto fewer pages, improving the locality of the dynamic
|
|
|
|
// linker.
|
2009-07-24 20:14:10 +00:00
|
|
|
if (ReloModel == Reloc::Static)
|
2009-07-26 07:00:12 +00:00
|
|
|
return SectionKind::get(SectionKind::DataNoRel, isWeak);
|
2009-07-24 19:15:47 +00:00
|
|
|
|
|
|
|
switch (C->getRelocationInfo()) {
|
|
|
|
default: llvm_unreachable("unknown relocation info kind");
|
2009-07-26 06:34:33 +00:00
|
|
|
case Constant::NoRelocation:
|
2009-07-26 07:00:12 +00:00
|
|
|
return SectionKind::get(SectionKind::DataNoRel, isWeak);
|
2009-07-26 06:34:33 +00:00
|
|
|
case Constant::LocalRelocation:
|
2009-07-26 07:00:12 +00:00
|
|
|
return SectionKind::get(SectionKind::DataRelLocal, isWeak);
|
2009-07-26 06:34:33 +00:00
|
|
|
case Constant::GlobalRelocations:
|
2009-07-26 07:00:12 +00:00
|
|
|
return SectionKind::get(SectionKind::DataRel, isWeak);
|
2009-07-24 19:15:47 +00:00
|
|
|
}
|
2008-06-28 13:45:57 +00:00
|
|
|
}
|
2008-07-09 13:16:59 +00:00
|
|
|
|
2009-07-25 18:11:58 +00:00
|
|
|
/// SectionForGlobal - This method computes the appropriate section to emit
|
|
|
|
/// the specified global variable or function definition. This should not
|
|
|
|
/// be passed external (or available externally) globals.
|
2009-07-21 21:09:35 +00:00
|
|
|
const Section *TargetAsmInfo::SectionForGlobal(const GlobalValue *GV) const {
|
2009-07-25 18:11:58 +00:00
|
|
|
assert(!GV->isDeclaration() && !GV->hasAvailableExternallyLinkage() &&
|
|
|
|
"Can only be used for global definitions");
|
|
|
|
|
2009-07-26 06:11:33 +00:00
|
|
|
SectionKind Kind = SectionKindForGlobal(GV, TM);
|
2009-07-24 18:34:27 +00:00
|
|
|
|
|
|
|
// Select section name.
|
2008-07-09 13:22:46 +00:00
|
|
|
if (GV->hasSection()) {
|
2009-07-24 18:34:27 +00:00
|
|
|
// If the target has special section hacks for specifically named globals,
|
|
|
|
// return them now.
|
|
|
|
if (const Section *TS = getSpecialCasedSectionGlobals(GV, Kind))
|
|
|
|
return TS;
|
|
|
|
|
2009-07-21 21:09:35 +00:00
|
|
|
// Honour section already set, if any.
|
2009-07-24 18:34:27 +00:00
|
|
|
unsigned Flags = SectionFlagsForGlobal(GV, Kind);
|
2009-07-24 16:50:24 +00:00
|
|
|
|
|
|
|
// This is an explicitly named section.
|
|
|
|
Flags |= SectionFlags::Named;
|
|
|
|
|
|
|
|
// If the target has magic semantics for certain section names, make sure to
|
|
|
|
// pick up the flags. This allows the user to write things with attribute
|
|
|
|
// section and still get the appropriate section flags printed.
|
2009-07-24 17:02:17 +00:00
|
|
|
Flags |= getFlagsForNamedSection(GV->getSection().c_str());
|
2009-07-24 16:50:24 +00:00
|
|
|
|
2009-07-21 21:09:35 +00:00
|
|
|
return getNamedSection(GV->getSection().c_str(), Flags);
|
2008-07-09 13:22:46 +00:00
|
|
|
}
|
2009-07-22 20:26:37 +00:00
|
|
|
|
2009-07-24 05:10:25 +00:00
|
|
|
// If this global is linkonce/weak and the target handles this by emitting it
|
|
|
|
// into a 'uniqued' section name, create and return the section now.
|
|
|
|
if (GV->isWeakForLinker()) {
|
2009-07-24 18:34:27 +00:00
|
|
|
if (const char *Prefix = getSectionPrefixForUniqueGlobal(Kind)) {
|
|
|
|
unsigned Flags = SectionFlagsForGlobal(GV, Kind);
|
2009-07-24 16:53:52 +00:00
|
|
|
|
2009-07-24 05:10:25 +00:00
|
|
|
// FIXME: Use mangler interface (PR4584).
|
2009-07-24 12:21:08 +00:00
|
|
|
std::string Name = Prefix+GV->getNameStr();
|
2009-07-24 05:10:25 +00:00
|
|
|
return getNamedSection(Name.c_str(), Flags);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2009-07-21 21:09:35 +00:00
|
|
|
// Use default section depending on the 'type' of global
|
2009-07-24 18:42:53 +00:00
|
|
|
return SelectSectionForGlobal(GV, Kind);
|
2008-07-09 13:22:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
// Lame default implementation. Calculate the section name for global.
|
2008-08-08 17:56:50 +00:00
|
|
|
const Section*
|
2009-07-24 18:42:53 +00:00
|
|
|
TargetAsmInfo::SelectSectionForGlobal(const GlobalValue *GV,
|
2009-07-25 23:21:55 +00:00
|
|
|
SectionKind Kind) const {
|
2009-07-26 05:44:20 +00:00
|
|
|
assert(!Kind.isThreadLocal() && "Doesn't support TLS");
|
|
|
|
|
|
|
|
if (Kind.isText())
|
2009-07-24 05:10:25 +00:00
|
|
|
return getTextSection();
|
|
|
|
|
2009-07-25 23:21:55 +00:00
|
|
|
if (Kind.isBSS())
|
2009-07-24 05:10:25 +00:00
|
|
|
if (const Section *S = getBSSSection_())
|
|
|
|
return S;
|
|
|
|
|
2009-07-25 23:21:55 +00:00
|
|
|
if (Kind.isReadOnly())
|
2009-07-24 05:10:25 +00:00
|
|
|
if (const Section *S = getReadOnlySection())
|
|
|
|
return S;
|
2008-07-09 13:18:02 +00:00
|
|
|
|
2008-09-24 22:16:16 +00:00
|
|
|
return getDataSection();
|
2008-07-09 13:18:02 +00:00
|
|
|
}
|
2008-07-09 13:19:38 +00:00
|
|
|
|
2009-07-22 00:28:43 +00:00
|
|
|
/// getSectionForMergableConstant - Given a mergable constant with the
|
|
|
|
/// specified size and relocation information, return a section that it
|
|
|
|
/// should be placed in.
|
|
|
|
const Section *
|
2009-07-26 06:48:26 +00:00
|
|
|
TargetAsmInfo::getSectionForMergeableConstant(SectionKind Kind) const {
|
2009-07-26 06:26:55 +00:00
|
|
|
if (Kind.isReadOnly())
|
2009-07-26 05:57:07 +00:00
|
|
|
if (const Section *S = getReadOnlySection())
|
|
|
|
return S;
|
|
|
|
|
2008-09-24 22:16:16 +00:00
|
|
|
return getDataSection();
|
2008-08-07 09:50:34 +00:00
|
|
|
}
|
|
|
|
|
2009-07-22 00:28:43 +00:00
|
|
|
|
2009-07-21 21:09:35 +00:00
|
|
|
const Section *TargetAsmInfo::getNamedSection(const char *Name, unsigned Flags,
|
|
|
|
bool Override) const {
|
|
|
|
Section &S = Sections[Name];
|
2008-07-09 13:28:49 +00:00
|
|
|
|
|
|
|
// This is newly-created section, set it up properly.
|
2008-08-16 12:58:12 +00:00
|
|
|
if (S.Flags == SectionFlags::Invalid || Override) {
|
2008-07-09 13:28:49 +00:00
|
|
|
S.Flags = Flags | SectionFlags::Named;
|
|
|
|
S.Name = Name;
|
|
|
|
}
|
|
|
|
|
|
|
|
return &S;
|
|
|
|
}
|
|
|
|
|
|
|
|
const Section*
|
2008-08-16 12:58:12 +00:00
|
|
|
TargetAsmInfo::getUnnamedSection(const char *Directive, unsigned Flags,
|
|
|
|
bool Override) const {
|
2008-07-09 13:28:49 +00:00
|
|
|
Section& S = Sections[Directive];
|
|
|
|
|
|
|
|
// This is newly-created section, set it up properly.
|
2008-08-16 12:58:12 +00:00
|
|
|
if (S.Flags == SectionFlags::Invalid || Override) {
|
2008-07-09 13:28:49 +00:00
|
|
|
S.Flags = Flags & ~SectionFlags::Named;
|
|
|
|
S.Name = Directive;
|
|
|
|
}
|
|
|
|
|
|
|
|
return &S;
|
|
|
|
}
|
2008-08-16 12:57:07 +00:00
|
|
|
|
|
|
|
const std::string&
|
|
|
|
TargetAsmInfo::getSectionFlags(unsigned Flags) const {
|
|
|
|
SectionFlags::FlagsStringsMapType::iterator I = FlagsStrings.find(Flags);
|
|
|
|
|
|
|
|
// We didn't print these flags yet, print and save them to map. This reduces
|
|
|
|
// amount of heap trashing due to std::string construction / concatenation.
|
|
|
|
if (I == FlagsStrings.end())
|
|
|
|
I = FlagsStrings.insert(std::make_pair(Flags,
|
|
|
|
printSectionFlags(Flags))).first;
|
|
|
|
|
|
|
|
return I->second;
|
|
|
|
}
|
2008-08-16 12:57:46 +00:00
|
|
|
|
|
|
|
unsigned TargetAsmInfo::getULEB128Size(unsigned Value) {
|
|
|
|
unsigned Size = 0;
|
|
|
|
do {
|
|
|
|
Value >>= 7;
|
|
|
|
Size += sizeof(int8_t);
|
|
|
|
} while (Value);
|
|
|
|
return Size;
|
|
|
|
}
|
|
|
|
|
|
|
|
unsigned TargetAsmInfo::getSLEB128Size(int Value) {
|
|
|
|
unsigned Size = 0;
|
|
|
|
int Sign = Value >> (8 * sizeof(Value) - 1);
|
|
|
|
bool IsMore;
|
|
|
|
|
|
|
|
do {
|
|
|
|
unsigned Byte = Value & 0x7f;
|
|
|
|
Value >>= 7;
|
|
|
|
IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
|
|
|
|
Size += sizeof(int8_t);
|
|
|
|
} while (IsMore);
|
|
|
|
return Size;
|
|
|
|
}
|