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Drop support for an old version of ld64 (from darwin 9).

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220310 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2014-10-21 18:31:09 +00:00
parent 3f898e6785
commit 4af7ead7bd
7 changed files with 3 additions and 57 deletions
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8
include/llvm/MC/MCAsmInfo.h
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@ -92,11 +92,6 @@ protected:
/// is false.
bool HasStaticCtorDtorReferenceInStaticMode;
/// True if the linker has a bug and requires that the debug_line section be
/// of a minimum size. In practice such a linker requires a non-empty line
/// sequence if a file is present. Default to false.
bool LinkerRequiresNonEmptyDwarfLines;
/// This is the maximum possible length of an instruction, which is needed to
/// compute the size of an inline asm. Defaults to 4.
unsigned MaxInstLength;
@ -405,9 +400,6 @@ public:
bool hasStaticCtorDtorReferenceInStaticMode() const {
return HasStaticCtorDtorReferenceInStaticMode;
}
bool getLinkerRequiresNonEmptyDwarfLines() const {
return LinkerRequiresNonEmptyDwarfLines;
}
unsigned getMaxInstLength() const { return MaxInstLength; }
unsigned getMinInstAlignment() const { return MinInstAlignment; }
bool getDollarIsPC() const { return DollarIsPC; }

1
lib/MC/MCAsmInfo.cpp
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@ -32,7 +32,6 @@ MCAsmInfo::MCAsmInfo() {
HasMachoZeroFillDirective = false;
HasMachoTBSSDirective = false;
HasStaticCtorDtorReferenceInStaticMode = false;
LinkerRequiresNonEmptyDwarfLines = false;
MaxInstLength = 4;
MinInstAlignment = 1;
DollarIsPC = false;

3
lib/MC/MCAsmInfoDarwin.cpp
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@ -42,9 +42,6 @@ MCAsmInfoDarwin::MCAsmInfoDarwin() {
HasMachoTBSSDirective = true; // Uses .tbss
HasStaticCtorDtorReferenceInStaticMode = true;
// FIXME: Darwin 10 and newer don't need this.
LinkerRequiresNonEmptyDwarfLines = true;
// FIXME: Change this once MC is the system assembler.
HasAggressiveSymbolFolding = false;

12
lib/MC/MCDwarf.cpp
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@ -344,18 +344,6 @@ void MCDwarfLineTable::EmitCU(MCObjectStreamer *MCOS) const {
for (const auto &LineSec : MCLineSections.getMCLineEntries())
EmitDwarfLineTable(MCOS, LineSec.first, LineSec.second);
if (MCOS->getContext().getAsmInfo()->getLinkerRequiresNonEmptyDwarfLines() &&
MCLineSections.getMCLineEntries().empty()) {
// The darwin9 linker has a bug (see PR8715). For for 32-bit architectures
// it requires:
// total_length >= prologue_length + 10
// We are 4 bytes short, since we have total_length = 51 and
// prologue_length = 45
// The regular end_sequence should be sufficient.
MCDwarfLineAddr::Emit(MCOS, INT64_MAX, 0);
}
// This is the end of the section, so set the value of the symbol at the end
// of this section (that was used in a previous expression).
MCOS->EmitLabel(LineEndSym);

1
lib/Target/R600/MCTargetDesc/AMDGPUMCAsmInfo.cpp
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@ -15,7 +15,6 @@ AMDGPUMCAsmInfo::AMDGPUMCAsmInfo(StringRef &TT) : MCAsmInfoELF() {
HasSingleParameterDotFile = false;
//===------------------------------------------------------------------===//
HasSubsectionsViaSymbols = true;
LinkerRequiresNonEmptyDwarfLines = true;
MaxInstLength = 16;
SeparatorString = "\n";
CommentString = ";";

29
test/MC/MachO/empty-dwarf-lines.s
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@ -1,29 +0,0 @@
// RUN: llvm-mc -triple x86_64-apple-darwin9 %s -filetype=obj -o - | llvm-readobj -s | FileCheck %s
// This tests that when producing files for darwin9 or older we make sure
// that debug_line sections are of a minimum size to avoid the linker bug
// described in PR8715.
.section __DATA,__data
.file 1 "test.c"
.globl _c ## @c
_c:
.asciz "hi\n"
// CHECK: Section {
// CHECK: Index: 2
// CHECK-NEXT: Name: __debug_line
// CHECK-NEXT: Segment: __DWARF
// CHECK-NEXT: Address: 0x4
// CHECK-NEXT: Size: 0x2C
// CHECK-NEXT: Offset: 452
// CHECK-NEXT: Alignment: 0
// CHECK-NEXT: RelocationOffset: 0x0
// CHECK-NEXT: RelocationCount: 0
// CHECK-NEXT: Type: 0x0
// CHECK-NEXT: Attributes [ (0x20000)
// CHECK-NEXT: Debug (0x20000)
// CHECK-NEXT: ]
// CHECK-NEXT: Reserved1: 0x0
// CHECK-NEXT: Reserved2: 0x0
// CHECK-NEXT: }

6
test/MC/MachO/file.s
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@ -8,7 +8,7 @@
// CHECK-NEXT: Name: __debug_line
// CHECK-NEXT: Segment: __DWARF
// CHECK-NEXT: Address: 0x1
// CHECK-NEXT: Size: 0x2D
// CHECK-NEXT: Size: 0x28
// CHECK-NEXT: Offset: 221
// CHECK-NEXT: Alignment: 0
// CHECK-NEXT: RelocationOffset: 0x0
@ -20,8 +20,8 @@
// CHECK-NEXT: Reserved1: 0x0
// CHECK-NEXT: Reserved2: 0x0
// CHECK-NEXT: SectionData (
// CHECK-NEXT: 0000: 29000000 02001E00 00000101 FB0E0D00
// CHECK-NEXT: 0000: 24000000 02001E00 00000101 FB0E0D00
// CHECK-NEXT: 0010: 01010101 00000001 00000164 69720000
// CHECK-NEXT: 0020: 666F6F00 01000000 02000001 01
// CHECK-NEXT: 0020: 666F6F00 01000000
// CHECK-NEXT: )
// CHECK-NEXT: }