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MC: Remove obsolete MachO UseAggressiveSymbolFolding.

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Fix the FIXME and remove this old as(1) compat option. It was useful for
bringup of the integrated assembler to diff object files, but now it's
just causing more relocations than strictly necessary to be generated.

rdar://21201804

llvm-svn: 239084
This commit is contained in:
Jim Grosbach 2015-06-04 20:27:42 +00:00
parent ac840c00ea
commit 3a8310cc67
9 changed files with 28 additions and 81 deletions
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7
include/llvm/MC/MCMachObjectWriter.h
View File

@ -27,15 +27,11 @@ class MCMachObjectTargetWriter {
const unsigned Is64Bit : 1;
const uint32_t CPUType;
const uint32_t CPUSubtype;
// FIXME: Remove this, we should just always use it once we no longer care
// about Darwin 'as' compatibility.
const unsigned UseAggressiveSymbolFolding : 1;
unsigned LocalDifference_RIT;
protected:
MCMachObjectTargetWriter(bool Is64Bit_, uint32_t CPUType_,
uint32_t CPUSubtype_,
bool UseAggressiveSymbolFolding_ = false);
uint32_t CPUSubtype_);
void setLocalDifferenceRelocationType(unsigned Type) {
LocalDifference_RIT = Type;
@ -55,7 +51,6 @@ public:
/// @{
bool is64Bit() const { return Is64Bit; }
bool useAggressiveSymbolFolding() const { return UseAggressiveSymbolFolding; }
uint32_t getCPUType() const { return CPUType; }
uint32_t getCPUSubtype() const { return CPUSubtype; }
unsigned getLocalDifferenceRelocationType() const {

13
lib/MC/MCMachObjectTargetWriter.cpp
View File

@ -11,12 +11,9 @@
using namespace llvm;
MCMachObjectTargetWriter::MCMachObjectTargetWriter(
bool Is64Bit_, uint32_t CPUType_, uint32_t CPUSubtype_,
bool UseAggressiveSymbolFolding_)
: Is64Bit(Is64Bit_), CPUType(CPUType_), CPUSubtype(CPUSubtype_),
UseAggressiveSymbolFolding(UseAggressiveSymbolFolding_) {
}
MCMachObjectTargetWriter::MCMachObjectTargetWriter(bool Is64Bit_,
uint32_t CPUType_,
uint32_t CPUSubtype_)
: Is64Bit(Is64Bit_), CPUType(CPUType_), CPUSubtype(CPUSubtype_) {}
MCMachObjectTargetWriter::~MCMachObjectTargetWriter() {
}
MCMachObjectTargetWriter::~MCMachObjectTargetWriter() {}

3
lib/MC/MachObjectWriter.cpp
View File

@ -703,9 +703,6 @@ bool MachObjectWriter::IsSymbolRefDifferenceFullyResolvedImpl(
SA.isTemporary() && SA.isInSection() && &SecA == &SecB){
return true;
}
} else {
if (!TargetObjectWriter->useAggressiveSymbolFolding())
return false;
}
// If they are not in the same section, we can't compute the diff.

3
lib/Target/AArch64/MCTargetDesc/AArch64MachObjectWriter.cpp
View File

@ -31,8 +31,7 @@ class AArch64MachObjectWriter : public MCMachObjectTargetWriter {
public:
AArch64MachObjectWriter(uint32_t CPUType, uint32_t CPUSubtype)
: MCMachObjectTargetWriter(true /* is64Bit */, CPUType, CPUSubtype,
/*UseAggressiveSymbolFolding=*/true) {}
: MCMachObjectTargetWriter(true /* is64Bit */, CPUType, CPUSubtype) {}
void RecordRelocation(MachObjectWriter *Writer, MCAssembler &Asm,
const MCAsmLayout &Layout, const MCFragment *Fragment,

6
lib/Target/ARM/MCTargetDesc/ARMMachObjectWriter.cpp
View File

@ -49,10 +49,8 @@ class ARMMachObjectWriter : public MCMachObjectTargetWriter {
const MCSymbol &S, uint64_t FixedValue);
public:
ARMMachObjectWriter(bool Is64Bit, uint32_t CPUType,
uint32_t CPUSubtype)
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype,
/*UseAggressiveSymbolFolding=*/true) {}
ARMMachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype)
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype) {}
void RecordRelocation(MachObjectWriter *Writer, MCAssembler &Asm,
const MCAsmLayout &Layout, const MCFragment *Fragment,

3
lib/Target/PowerPC/MCTargetDesc/PPCMachObjectWriter.cpp
View File

@ -38,8 +38,7 @@ class PPCMachObjectWriter : public MCMachObjectTargetWriter {
public:
PPCMachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype)
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype,
/*UseAggressiveSymbolFolding=*/Is64Bit) {}
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype) {}
void RecordRelocation(MachObjectWriter *Writer, MCAssembler &Asm,
const MCAsmLayout &Layout, const MCFragment *Fragment,

6
lib/Target/X86/MCTargetDesc/X86MachObjectWriter.cpp
View File

@ -54,10 +54,8 @@ class X86MachObjectWriter : public MCMachObjectTargetWriter {
MCValue Target, uint64_t &FixedValue);
public:
X86MachObjectWriter(bool Is64Bit, uint32_t CPUType,
uint32_t CPUSubtype)
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype,
/*UseAggressiveSymbolFolding=*/Is64Bit) {}
X86MachObjectWriter(bool Is64Bit, uint32_t CPUType, uint32_t CPUSubtype)
: MCMachObjectTargetWriter(Is64Bit, CPUType, CPUSubtype) {}
void RecordRelocation(MachObjectWriter *Writer, MCAssembler &Asm,
const MCAsmLayout &Layout, const MCFragment *Fragment,

46
test/MC/MachO/absolutize.s
View File

@ -6,9 +6,9 @@ _text_b:
xorl %eax,%eax
Ltext_c:
xorl %eax,%eax
Ltext_d:
Ltext_d:
xorl %eax,%eax
movl $(_text_a - _text_b), %eax
Ltext_expr_0 = _text_a - _text_b
movl $(Ltext_expr_0), %eax
@ -30,9 +30,9 @@ _data_b:
.long 0
Ldata_c:
.long 0
Ldata_d:
Ldata_d:
.long 0
.long _data_a - _data_b
Ldata_expr_0 = _data_a - _data_b
.long Ldata_expr_0
@ -75,7 +75,7 @@ Ldata_expr_2 = Ldata_d - Ldata_c
// CHECK: ('offset', 324)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 412)
// CHECK: ('num_reloc', 7)
// CHECK: ('num_reloc', 3)
// CHECK: ('flags', 0x80000400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
@ -85,21 +85,9 @@ Ldata_expr_2 = Ldata_d - Ldata_c
// CHECK: (('word-0', 0xa0000027),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0xa400001d),
// CHECK: ('word-1', 0x6)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x4)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0xa4000013),
// CHECK: ('word-1', 0x4)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x2)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0xa4000009),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 6
// CHECK: # Relocation 2
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x2)),
// CHECK: ])
@ -111,8 +99,8 @@ Ldata_expr_2 = Ldata_d - Ldata_c
// CHECK: ('size', 44)
// CHECK: ('offset', 367)
// CHECK: ('alignment', 0)
// CHECK: ('reloc_offset', 468)
// CHECK: ('num_reloc', 7)
// CHECK: ('reloc_offset', 436)
// CHECK: ('num_reloc', 3)
// CHECK: ('flags', 0x0)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
@ -122,21 +110,9 @@ Ldata_expr_2 = Ldata_d - Ldata_c
// CHECK: (('word-0', 0xa0000028),
// CHECK: ('word-1', 0x2b)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0xa4000020),
// CHECK: ('word-1', 0x37)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x33)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0xa4000018),
// CHECK: ('word-1', 0x33)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x2f)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0xa4000010),
// CHECK: ('word-1', 0x2b)),
// CHECK: # Relocation 6
// CHECK: # Relocation 2
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x2f)),
// CHECK: ])
@ -146,9 +122,9 @@ Ldata_expr_2 = Ldata_d - Ldata_c
// CHECK: # Load Command 1
// CHECK: (('command', 2)
// CHECK: ('size', 24)
// CHECK: ('symoff', 524)
// CHECK: ('symoff', 460)
// CHECK: ('nsyms', 4)
// CHECK: ('stroff', 572)
// CHECK: ('stroff', 508)
// CHECK: ('strsize', 36)
// CHECK: ('_string_data', '\x00_text_b\x00_data_b\x00_text_a\x00_data_a\x00\x00\x00\x00')
// CHECK: ('_symbols', [

22
test/MC/MachO/reloc-diff.s
View File

@ -1,39 +1,27 @@
// RUN: llvm-mc -triple i386-apple-darwin9 %s -filetype=obj -o - | macho-dump | FileCheck %s
// CHECK: # Relocation 0
// CHECK: (('word-0', 0xa2000014),
// CHECK: (('word-0', 0xa4000010),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 2
// CHECK: (('word-0', 0xa4000010),
// CHECK: (('word-0', 0xa4000008),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 3
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 4
// CHECK: (('word-0', 0xa400000c),
// CHECK: (('word-0', 0xa4000004),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 5
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 6
// CHECK: (('word-0', 0xa4000008),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 7
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 8
// CHECK: (('word-0', 0xa4000004),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 9
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 10
// CHECK: (('word-0', 0xa2000000),
// CHECK: ('word-1', 0x0)),
// CHECK: # Relocation 11
// CHECK: # Relocation 7
// CHECK: (('word-0', 0xa1000000),
// CHECK: ('word-1', 0x0)),
// CHECK-NEXT: ])
@ -43,7 +31,7 @@ _local_def:
_external_def:
Ltemp:
ret
.data
.long _external_def - _local_def
.long Ltemp - _local_def