[llvm-commits] [llvm] r103532 - in /llvm/trunk: include/llvm/Target/TargetAsmBackend.h lib/MC/MCAssembler.cpp lib/Target/X86/X86AsmBackend.cpp test/MC/MachO/darwin-x86_64-reloc.s
Daniel Dunbar
daniel at zuster.org
Tue May 11 17:38:17 PDT 2010
Author: ddunbar
Date: Tue May 11 19:38:17 2010
New Revision: 103532
URL: http://llvm.org/viewvc/llvm-project?rev=103532&view=rev
Log:
MC/Mach-O/x86_64: Add a new hook for checking whether a particular section can
be diced into atoms, and adjust getAtom() to take this into account.
- This fixes relocations to symbols in fixed size literal sections, for
example.
Modified:
llvm/trunk/include/llvm/Target/TargetAsmBackend.h
llvm/trunk/lib/MC/MCAssembler.cpp
llvm/trunk/lib/Target/X86/X86AsmBackend.cpp
llvm/trunk/test/MC/MachO/darwin-x86_64-reloc.s
Modified: llvm/trunk/include/llvm/Target/TargetAsmBackend.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetAsmBackend.h?rev=103532&r1=103531&r2=103532&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Target/TargetAsmBackend.h (original)
+++ llvm/trunk/include/llvm/Target/TargetAsmBackend.h Tue May 11 19:38:17 2010
@@ -90,6 +90,14 @@
return false;
}
+ /// isSectionAtomizable - Check whether the given section can be split into
+ /// atoms.
+ ///
+ /// \see MCAssembler::isSymbolLinkerVisible().
+ virtual bool isSectionAtomizable(const MCSection &Section) const {
+ return true;
+ }
+
/// isVirtualSection - Check whether the given section is "virtual", that is
/// has no actual object file contents.
virtual bool isVirtualSection(const MCSection &Section) const = 0;
Modified: llvm/trunk/lib/MC/MCAssembler.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/MC/MCAssembler.cpp?rev=103532&r1=103531&r2=103532&view=diff
==============================================================================
--- llvm/trunk/lib/MC/MCAssembler.cpp (original)
+++ llvm/trunk/lib/MC/MCAssembler.cpp Tue May 11 19:38:17 2010
@@ -297,6 +297,12 @@
if (!SD->getFragment())
return 0;
+ // Non-linker visible symbols in sections which can't be atomized have no
+ // defining atom.
+ if (!getBackend().isSectionAtomizable(
+ SD->getFragment()->getParent()->getSection()))
+ return 0;
+
// Otherwise, return the atom for the containing fragment.
return SD->getFragment()->getAtom();
}
Modified: llvm/trunk/lib/Target/X86/X86AsmBackend.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86AsmBackend.cpp?rev=103532&r1=103531&r2=103532&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86AsmBackend.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86AsmBackend.cpp Tue May 11 19:38:17 2010
@@ -259,6 +259,26 @@
const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
return SMO.getType() == MCSectionMachO::S_CSTRING_LITERALS;
}
+
+ virtual bool isSectionAtomizable(const MCSection &Section) const {
+ const MCSectionMachO &SMO = static_cast<const MCSectionMachO&>(Section);
+ // Fixed sized data sections are uniqued, they cannot be diced into atoms.
+ switch (SMO.getType()) {
+ default:
+ return true;
+
+ case MCSectionMachO::S_4BYTE_LITERALS:
+ case MCSectionMachO::S_8BYTE_LITERALS:
+ case MCSectionMachO::S_16BYTE_LITERALS:
+ case MCSectionMachO::S_LITERAL_POINTERS:
+ case MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS:
+ case MCSectionMachO::S_LAZY_SYMBOL_POINTERS:
+ case MCSectionMachO::S_MOD_INIT_FUNC_POINTERS:
+ case MCSectionMachO::S_MOD_TERM_FUNC_POINTERS:
+ case MCSectionMachO::S_INTERPOSING:
+ return false;
+ }
+ }
};
}
Modified: llvm/trunk/test/MC/MachO/darwin-x86_64-reloc.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/MachO/darwin-x86_64-reloc.s?rev=103532&r1=103531&r2=103532&view=diff
==============================================================================
--- llvm/trunk/test/MC/MachO/darwin-x86_64-reloc.s (original)
+++ llvm/trunk/test/MC/MachO/darwin-x86_64-reloc.s Tue May 11 19:38:17 2010
@@ -64,37 +64,56 @@
.long 0
.text
movl L4(%rip), %eax
+
+ .section __TEXT,__literal8,8byte_literals
+ .quad 0
+L5:
+ .quad 0
+f6:
+ .quad 0
+L6:
+ .quad 0
+ .text
+ movl L5(%rip), %eax
+ movl f6(%rip), %eax
+ movl L6(%rip), %eax
+
+ .data
+ .quad L5
+ .quad f6
+ .quad L6
+
// CHECK: ('cputype', 16777223)
// CHECK: ('cpusubtype', 3)
// CHECK: ('filetype', 1)
// CHECK: ('num_load_commands', 1)
-// CHECK: ('load_commands_size', 416)
+// CHECK: ('load_commands_size', 496)
// CHECK: ('flag', 0)
// CHECK: ('reserved', 0)
// CHECK: ('load_commands', [
// CHECK: # Load Command 0
// CHECK: (('command', 25)
-// CHECK: ('size', 312)
+// CHECK: ('size', 392)
// CHECK: ('segment_name', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('vm_addr', 0)
-// CHECK: ('vm_size', 229)
-// CHECK: ('file_offset', 448)
-// CHECK: ('file_size', 229)
+// CHECK: ('vm_size', 303)
+// CHECK: ('file_offset', 528)
+// CHECK: ('file_size', 303)
// CHECK: ('maxprot', 7)
// CHECK: ('initprot', 7)
-// CHECK: ('num_sections', 3)
+// CHECK: ('num_sections', 4)
// CHECK: ('flags', 0)
// CHECK: ('sections', [
// CHECK: # Section 0
// CHECK: (('section_name', '__data\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__DATA\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('address', 0)
-// CHECK: ('size', 16)
-// CHECK: ('offset', 448)
+// CHECK: ('size', 40)
+// CHECK: ('offset', 528)
// CHECK: ('alignment', 0)
-// CHECK: ('reloc_offset', 680)
-// CHECK: ('num_reloc', 2)
+// CHECK: ('reloc_offset', 832)
+// CHECK: ('num_reloc', 5)
// CHECK: ('flags', 0x0)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
@@ -102,22 +121,31 @@
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
+// CHECK: (('word-0', 0x20),
+// CHECK: ('word-1', 0x6000004)),
+// CHECK: # Relocation 1
+// CHECK: (('word-0', 0x18),
+// CHECK: ('word-1', 0xe000006)),
+// CHECK: # Relocation 2
+// CHECK: (('word-0', 0x10),
+// CHECK: ('word-1', 0x6000004)),
+// CHECK: # Relocation 3
// CHECK: (('word-0', 0x8),
// CHECK: ('word-1', 0x4d000000)),
-// CHECK: # Relocation 1
+// CHECK: # Relocation 4
// CHECK: (('word-0', 0x4),
-// CHECK: ('word-1', 0x4d000007)),
+// CHECK: ('word-1', 0x4d000008)),
// CHECK: ])
-// CHECK: ('_section_data', '\x00\x00\x00\x00\x04\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00')
+// CHECK: ('_section_data', "\x00\x00\x00\x00\x04\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x17\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'\x01\x00\x00\x00\x00\x00\x00")
// CHECK: # Section 1
// CHECK: (('section_name', '__text\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
-// CHECK: ('address', 16)
-// CHECK: ('size', 197)
-// CHECK: ('offset', 464)
+// CHECK: ('address', 40)
+// CHECK: ('size', 215)
+// CHECK: ('offset', 568)
// CHECK: ('alignment', 0)
-// CHECK: ('reloc_offset', 696)
-// CHECK: ('num_reloc', 28)
+// CHECK: ('reloc_offset', 872)
+// CHECK: ('num_reloc', 31)
// CHECK: ('flags', 0x80000400)
// CHECK: ('reserved1', 0)
// CHECK: ('reserved2', 0)
@@ -125,99 +153,108 @@
// CHECK: ),
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
+// CHECK: (('word-0', 0xd3),
+// CHECK: ('word-1', 0x15000004)),
+// CHECK: # Relocation 1
+// CHECK: (('word-0', 0xcd),
+// CHECK: ('word-1', 0x1d000006)),
+// CHECK: # Relocation 2
+// CHECK: (('word-0', 0xc7),
+// CHECK: ('word-1', 0x15000004)),
+// CHECK: # Relocation 3
// CHECK: (('word-0', 0xc1),
// CHECK: ('word-1', 0x15000001)),
-// CHECK: # Relocation 1
+// CHECK: # Relocation 4
// CHECK: (('word-0', 0xa5),
// CHECK: ('word-1', 0x5e000003)),
-// CHECK: # Relocation 2
+// CHECK: # Relocation 5
// CHECK: (('word-0', 0xa5),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 3
+// CHECK: # Relocation 6
// CHECK: (('word-0', 0x9d),
// CHECK: ('word-1', 0x5e000003)),
-// CHECK: # Relocation 4
+// CHECK: # Relocation 7
// CHECK: (('word-0', 0x9d),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 5
+// CHECK: # Relocation 8
// CHECK: (('word-0', 0x95),
// CHECK: ('word-1', 0xe000003)),
-// CHECK: # Relocation 6
+// CHECK: # Relocation 9
// CHECK: (('word-0', 0x8d),
// CHECK: ('word-1', 0xe000003)),
-// CHECK: # Relocation 7
+// CHECK: # Relocation 10
// CHECK: (('word-0', 0x79),
// CHECK: ('word-1', 0x8d000003)),
-// CHECK: # Relocation 8
+// CHECK: # Relocation 11
// CHECK: (('word-0', 0x71),
// CHECK: ('word-1', 0x7d000003)),
-// CHECK: # Relocation 9
+// CHECK: # Relocation 12
// CHECK: (('word-0', 0x69),
// CHECK: ('word-1', 0x6d000003)),
-// CHECK: # Relocation 10
+// CHECK: # Relocation 13
// CHECK: (('word-0', 0x63),
// CHECK: ('word-1', 0x1d000003)),
-// CHECK: # Relocation 11
+// CHECK: # Relocation 14
// CHECK: (('word-0', 0x5c),
// CHECK: ('word-1', 0x1d000003)),
-// CHECK: # Relocation 12
+// CHECK: # Relocation 15
// CHECK: (('word-0', 0x55),
// CHECK: ('word-1', 0x5c000002)),
-// CHECK: # Relocation 13
+// CHECK: # Relocation 16
// CHECK: (('word-0', 0x55),
// CHECK: ('word-1', 0xc000000)),
-// CHECK: # Relocation 14
+// CHECK: # Relocation 17
// CHECK: (('word-0', 0x4d),
// CHECK: ('word-1', 0x5e000002)),
-// CHECK: # Relocation 15
+// CHECK: # Relocation 18
// CHECK: (('word-0', 0x4d),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 16
+// CHECK: # Relocation 19
// CHECK: (('word-0', 0x45),
// CHECK: ('word-1', 0x5e000002)),
-// CHECK: # Relocation 17
+// CHECK: # Relocation 20
// CHECK: (('word-0', 0x45),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 18
+// CHECK: # Relocation 21
// CHECK: (('word-0', 0x3d),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 19
+// CHECK: # Relocation 22
// CHECK: (('word-0', 0x35),
// CHECK: ('word-1', 0xe000000)),
-// CHECK: # Relocation 20
+// CHECK: # Relocation 23
// CHECK: (('word-0', 0x2d),
// CHECK: ('word-1', 0x8d000000)),
-// CHECK: # Relocation 21
+// CHECK: # Relocation 24
// CHECK: (('word-0', 0x26),
// CHECK: ('word-1', 0x6d000000)),
-// CHECK: # Relocation 22
+// CHECK: # Relocation 25
// CHECK: (('word-0', 0x20),
// CHECK: ('word-1', 0x1d000000)),
-// CHECK: # Relocation 23
+// CHECK: # Relocation 26
// CHECK: (('word-0', 0x1a),
// CHECK: ('word-1', 0x1d000000)),
-// CHECK: # Relocation 24
+// CHECK: # Relocation 27
// CHECK: (('word-0', 0x14),
// CHECK: ('word-1', 0x4d000000)),
-// CHECK: # Relocation 25
+// CHECK: # Relocation 28
// CHECK: (('word-0', 0xe),
// CHECK: ('word-1', 0x3d000000)),
-// CHECK: # Relocation 26
+// CHECK: # Relocation 29
// CHECK: (('word-0', 0x7),
// CHECK: ('word-1', 0x2d000000)),
-// CHECK: # Relocation 27
+// CHECK: # Relocation 30
// CHECK: (('word-0', 0x2),
// CHECK: ('word-1', 0x2d000000)),
// CHECK: ])
-// CHECK: ('_section_data', '\xc3\xe8\x00\x00\x00\x00\xe8\x04\x00\x00\x00H\x8b\x05\x00\x00\x00\x00\xff5\x00\x00\x00\x00\x8b\x05\x00\x00\x00\x00\x8b\x05\x04\x00\x00\x00\xc6\x05\xff\xff\xff\xff\x12\xc7\x05\xfc\xff\xff\xffxV4\x12\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00H\x8d\x05,\x00\x00\x00H\x8d\x05\x14\x00\x00\x00\x83\x05\x13\x00\x00\x00\x06f\x81\x05\x12\x00\x00\x00\xf4\x01\x81\x05\x10\x00\x00\x00\xf4\x01\x00\x00\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90,\x00\x00\x00\x00\x00\x00\x00\x14\x00\x00\x00\x00\x00\x00\x00\xe4\xff\xff\xff\xff\xff\xff\xff\xd4\xff\xff\xff\xff\xff\xff\xff,\x00\x00\x00\x00\x00\x00\x00\x83\xc0\x00\x03\x04%\x03\x00\x00\x00\x8b\x057\xff\xff\xff')
+// CHECK: ('_section_data', '\xc3\xe8\x00\x00\x00\x00\xe8\x04\x00\x00\x00H\x8b\x05\x00\x00\x00\x00\xff5\x00\x00\x00\x00\x8b\x05\x00\x00\x00\x00\x8b\x05\x04\x00\x00\x00\xc6\x05\xff\xff\xff\xff\x12\xc7\x05\xfc\xff\xff\xffxV4\x12\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00H\x8d\x05,\x00\x00\x00H\x8d\x05\x14\x00\x00\x00\x83\x05\x13\x00\x00\x00\x06f\x81\x05\x12\x00\x00\x00\xf4\x01\x81\x05\x10\x00\x00\x00\xf4\x01\x00\x00\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90,\x00\x00\x00\x00\x00\x00\x00\x14\x00\x00\x00\x00\x00\x00\x00\xe4\xff\xff\xff\xff\xff\xff\xff\xd4\xff\xff\xff\xff\xff\xff\xff,\x00\x00\x00\x00\x00\x00\x00\x83\xc0\x00\x03\x04%\x03\x00\x00\x00\x8b\x05\x1f\xff\xff\xff\x8b\x05$\x00\x00\x00\x8b\x05\x00\x00\x00\x00\x8b\x05(\x00\x00\x00')
// CHECK: # Section 2
// CHECK: (('section_name', '__debug_frame\x00\x00\x00')
// CHECK: ('segment_name', '__DWARF\x00\x00\x00\x00\x00\x00\x00\x00\x00')
-// CHECK: ('address', 213)
+// CHECK: ('address', 255)
// CHECK: ('size', 16)
-// CHECK: ('offset', 661)
+// CHECK: ('offset', 783)
// CHECK: ('alignment', 0)
-// CHECK: ('reloc_offset', 920)
+// CHECK: ('reloc_offset', 1120)
// CHECK: ('num_reloc', 2)
// CHECK: ('flags', 0x2000000)
// CHECK: ('reserved1', 0)
@@ -227,29 +264,46 @@
// CHECK: ('_relocations', [
// CHECK: # Relocation 0
// CHECK: (('word-0', 0x8),
-// CHECK: ('word-1', 0xe000006)),
+// CHECK: ('word-1', 0xe000007)),
// CHECK: # Relocation 1
// CHECK: (('word-0', 0x0),
// CHECK: ('word-1', 0x6000002)),
// CHECK: ])
-// CHECK: ('_section_data', '\xbd\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK: ('_section_data', '\xd5\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK: # Section 3
+// CHECK: (('section_name', '__literal8\x00\x00\x00\x00\x00\x00')
+// CHECK: ('segment_name', '__TEXT\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
+// CHECK: ('address', 271)
+// CHECK: ('size', 32)
+// CHECK: ('offset', 799)
+// CHECK: ('alignment', 0)
+// CHECK: ('reloc_offset', 0)
+// CHECK: ('num_reloc', 0)
+// CHECK: ('flags', 0x4)
+// CHECK: ('reserved1', 0)
+// CHECK: ('reserved2', 0)
+// CHECK: ('reserved3', 0)
+// CHECK: ),
+// CHECK: ('_relocations', [
+// CHECK: ])
+// CHECK: ('_section_data', '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
// CHECK: ])
// CHECK: ),
// CHECK: # Load Command 1
// CHECK: (('command', 2)
// CHECK: ('size', 24)
-// CHECK: ('symoff', 936)
-// CHECK: ('nsyms', 8)
-// CHECK: ('stroff', 1064)
-// CHECK: ('strsize', 48)
-// CHECK: ('_string_data', '\x00_foobar\x00_ext_foo\x00_foo\x00_baz\x00_bar\x00_prev\x00_f2\x00_f3\x00\x00')
+// CHECK: ('symoff', 1136)
+// CHECK: ('nsyms', 9)
+// CHECK: ('stroff', 1280)
+// CHECK: ('strsize', 52)
+// CHECK: ('_string_data', '\x00_foobar\x00_ext_foo\x00_foo\x00_baz\x00_bar\x00_prev\x00_f2\x00_f3\x00f6\x00\x00\x00')
// CHECK: ('_symbols', [
// CHECK: # Symbol 0
// CHECK: (('n_strx', 18)
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 16)
+// CHECK: ('n_value', 40)
// CHECK: ('_string', '_foo')
// CHECK: ),
// CHECK: # Symbol 1
@@ -257,7 +311,7 @@
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 17)
+// CHECK: ('n_value', 41)
// CHECK: ('_string', '_baz')
// CHECK: ),
// CHECK: # Symbol 2
@@ -265,7 +319,7 @@
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 77)
+// CHECK: ('n_value', 101)
// CHECK: ('_string', '_bar')
// CHECK: ),
// CHECK: # Symbol 3
@@ -273,7 +327,7 @@
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 145)
+// CHECK: ('n_value', 169)
// CHECK: ('_string', '_prev')
// CHECK: ),
// CHECK: # Symbol 4
@@ -281,7 +335,7 @@
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 197)
+// CHECK: ('n_value', 221)
// CHECK: ('_string', '_f2')
// CHECK: ),
// CHECK: # Symbol 5
@@ -289,10 +343,18 @@
// CHECK: ('n_type', 0xe)
// CHECK: ('n_sect', 2)
// CHECK: ('n_desc', 0)
-// CHECK: ('n_value', 200)
+// CHECK: ('n_value', 224)
// CHECK: ('_string', '_f3')
// CHECK: ),
// CHECK: # Symbol 6
+// CHECK: (('n_strx', 47)
+// CHECK: ('n_type', 0xe)
+// CHECK: ('n_sect', 4)
+// CHECK: ('n_desc', 0)
+// CHECK: ('n_value', 287)
+// CHECK: ('_string', 'f6')
+// CHECK: ),
+// CHECK: # Symbol 7
// CHECK: (('n_strx', 9)
// CHECK: ('n_type', 0x1)
// CHECK: ('n_sect', 0)
@@ -300,7 +362,7 @@
// CHECK: ('n_value', 0)
// CHECK: ('_string', '_ext_foo')
// CHECK: ),
-// CHECK: # Symbol 7
+// CHECK: # Symbol 8
// CHECK: (('n_strx', 1)
// CHECK: ('n_type', 0x1)
// CHECK: ('n_sect', 0)
@@ -314,10 +376,10 @@
// CHECK: (('command', 11)
// CHECK: ('size', 80)
// CHECK: ('ilocalsym', 0)
-// CHECK: ('nlocalsym', 6)
-// CHECK: ('iextdefsym', 6)
+// CHECK: ('nlocalsym', 7)
+// CHECK: ('iextdefsym', 7)
// CHECK: ('nextdefsym', 0)
-// CHECK: ('iundefsym', 6)
+// CHECK: ('iundefsym', 7)
// CHECK: ('nundefsym', 2)
// CHECK: ('tocoff', 0)
// CHECK: ('ntoc', 0)
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