David Blaikie fe25521451 Reimplement debug info compression by compressing the whole section, rather than a fragment. ... To support compressing the debug_line section that contains multiple fragments (due, I believe, to variation in choices of line table encoding depending on the size of instruction ranges in the actual program code) we needed to support compressing multiple MCFragments in a single pass. This patch implements that behavior by mutating the post-relaxed and relocated section to be the compressed form of its former self, including renaming the section. This is a more flexible (and less invasive, to a degree) implementation that will allow for other features such as "use compression only if it's smaller than the uncompressed data". Compressing debug_frame would be a possible further extension to this work, but I've left it for now. The hurdle there is alignment sections - which might require going as far as to refactor MCAssembler.cpp:writeFragment to handle writing to a byte buffer or an MCObjectWriter (there's already a virtual call there, so it shouldn't add substantial compile-time cost) which could in turn involve refactoring MCAsmBackend::writeNopData to use that same abstraction... which involves touching all the backends. This would remove the limited handling of fragment writing seen in ELFObjectWriter.cpp:getUncompressedData which would be nice - but it's more invasive. I did discover that I (perhaps obviously) don't need to handle relocations when I rewrite the fragments - since the relocations have already been applied and computed (and stored into ELFObjectWriter::Relocations) by this stage (necessarily, because we need to have written any immediate values or assembly-time relocations into the data already before we compress it, which we have). The test case doesn't necessarily cover that in detail - I can add more test coverage if that's preferred. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205990 91177308-0d34-0410-b5e6-96231b3b80d8		2014-04-10 21:53:53 +00:00
..
abs.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
alias-reloc.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
alias.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
align-bss.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
align-nops.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
align-size.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
align-text.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
align.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
bad-expr2.s	Completely rewrite ELFObjectWriter::RecordRelocation.	2014-03-29 06:26:49 +00:00
bad-expr3.s	Completely rewrite ELFObjectWriter::RecordRelocation.	2014-03-29 06:26:49 +00:00
bad-expr.s	Forgot to add testcase for r198590	2014-01-21 20:39:11 +00:00
bad-relocation.s	MC asm parser: allow ?'s in symbol names, and handle @'s in names in MS asm	2013-10-18 20:46:28 +00:00
bad-section.s
basic-elf-32.s	Work around gold bug http://sourceware.org/PR16794.	2014-04-02 12:15:20 +00:00
basic-elf-64.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
bracket-exprs.s
bracket.s
bss-large.ll	Added the test missed from r185080.	2013-07-01 09:02:33 +00:00
bss.ll
call-abs.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
cfi-adjust-cfa-offset.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-advance-loc2.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-def-cfa-offset.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-def-cfa-register.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-def-cfa.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-escape.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-offset.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-reg.s	PR13754: llvm-mc/x86 crashes on .cfi directives without the % prefix for registers.	2012-09-07 14:51:35 +00:00
cfi-register.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-rel-offset2.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-rel-offset.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-remember.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-restore.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-same-value.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-sections.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
cfi-signal-frame.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
cfi-undefined.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi-window-save.s	Implements parsing and emitting of .cfi_window_save in MC.	2013-09-26 14:49:40 +00:00
cfi-zero-addr-delta.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
cfi.s	MC: Add support for .cfi_startproc simple	2014-01-27 17:20:25 +00:00
comdat-dup-group-name.s	MC: Support multiple sections with the same name in the same comdat group	2013-10-22 23:41:52 +00:00
comdat-reloc.s	Put ELF COMDAT relocations into the relevant COMDAT group.	2013-07-10 20:58:17 +00:00
comdat.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
common2.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
common.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
comp-dir.s	X86MCAsmInfoGNUCOFF: Set PointerSize as 8 for targeting x64. It caused DW_LNE_set_address was misemitted on x64.	2014-04-08 15:28:50 +00:00
compression.s	Reimplement debug info compression by compressing the whole section, rather than a fragment.	2014-04-10 21:53:53 +00:00
debug-line2.s	[MC/DWARF] Generate multiple .debug_line entries for adjacent .loc directives	2013-06-19 21:27:27 +00:00
debug-line.s	Emit DWARF line entries for all data in the instruction stream.	2013-10-20 02:16:18 +00:00
debug-loc.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
diff2.s
diff.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
discriminator.s	Support DWARF discriminators in object streamer.	2014-02-14 19:27:53 +00:00
dot-symbol-assignment.s	Add support for assigning to . in AsmParser.	2014-02-17 20:48:32 +00:00
elf_directive_previous.s
elf_directive_section.s
empty-dwarf-lines.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
empty.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
entsize.ll	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
entsize.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
fde.s
file-double.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
file.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
gen-dwarf.s	DebugInfo: Avoid creating unnecessary/empty line tables and remove the special case of '0' in DwarfCompileUnit::initStmtList by just always using a label difference	2014-04-01 08:07:52 +00:00
global-offset.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
got.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
ident.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
ifunc-reloc.s	Force emit a relocation for @gnu_indirect_function symbols so that the indirect	2014-01-08 18:50:32 +00:00
invalid-symver.s
lcomm.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
leb128.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
lit.local.cfg	[tests] Cleanup initialization of test suffixes.	2013-08-16 00:37:11 +00:00
local-reloc.s	Fix broken CHECK lines	2014-02-16 07:31:05 +00:00
many-sections-2.s	Correctly detect if a symbol uses a reserved section index or not.	2014-03-26 00:16:43 +00:00
many-sections.s	Create .symtab_shndxr only when needed.	2014-03-25 23:44:25 +00:00
merge.s	Completely rewrite ELFObjectWriter::RecordRelocation.	2014-03-29 06:26:49 +00:00
n_bytes.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
no-fixup.s	Rewrite a test to check actual output rather than intermediate implementation	2013-03-01 20:54:00 +00:00
nocompression.s	llvm/test/MC/ELF/nocompression.s: Loosen an expression to match "llvm-mc.EXE".	2014-03-30 14:04:00 +00:00
noexec.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
norelocation.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
offset.s	Correctly propagates st_size.	2014-03-27 00:28:24 +00:00
org.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
pic-diff.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
plt.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
pr9292.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
relax-all-flag.s	Add a test for explicitly exercising the mc-relax-all flag.	2012-12-10 20:36:01 +00:00
relax-arith.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
relax-crash.s
relax.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
relocation-386.s	Work around gold bug http://sourceware.org/PR16794.	2014-04-02 12:15:20 +00:00
relocation-pc.s	Completely rewrite ELFObjectWriter::RecordRelocation.	2014-03-29 06:26:49 +00:00
relocation.s	Look through variables when computing relocations.	2014-03-20 02:12:01 +00:00
rename.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
section-quoting.s
section.s	ELF: Parse types in directives like binutils gas	2013-09-21 05:25:12 +00:00
set.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
sleb.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
subsection.s	Add support for subsections to the ELF assembler. Fixes PR8717.	2013-04-17 21:18:16 +00:00
symbol-names.s	MC asm parser: allow ?'s in symbol names, and handle @'s in names in MS asm	2013-10-18 20:46:28 +00:00
symref.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
tls-i386.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
tls.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
type-propagate.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
type.s	In the ELFWriter when writing aliased (.set) symbols dont blindly	2014-01-07 20:17:03 +00:00
uleb.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
undef2.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
undef.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
version.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
weak-relocation.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
weak.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
weakref-plt.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00
weakref-reloc.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
weakref.s	Teach llvm-readobj to print human friendly description of reserved sections.	2014-03-24 05:00:34 +00:00
x86_64-reloc-sizetest.s	Change how we iterate over relocations on ELF.	2013-05-30 03:05:14 +00:00
zero.s	Replace coff-/elf-dump with llvm-readobj	2013-04-12 04:06:46 +00:00