Versioned debug info support has been a burden to maintain & also compromised
current debug info verification by causing test cases testing old debug info to
remain rather than being updated to the latest. It also makes it hard to add or
change the metadata schema by requiring various backwards-compatibility in the
DI* hierarchy.

So it's being removed in preparation for new changes to the schema to tidy up
old/unnecessary fields and add new fields needed for new debug info (well, new
to LLVM at least).

The more surprising part of this is the changes to DI*::Verify - this became
necessary due to the changes to AsmWriter. AsmWriter was relying on the version
test to decide which bits of metadata were actually debug info when printing
the comment annotations. Without the version information the tag numbers were
too common & it would print debug info on random metadata that happened to
start with an integer that matched a tag number. Instead this change makes the
Verify functions more precise (just adding "number of operands" checks - not
type checking those operands yet) & relies on that to decide which metadata is
debug info metadata.

llvm-svn: 176838

We now emit a line table for each compile unit. To reduce the prologue size
of each line table, the files and directories used by each compile unit are
stored in std::map<unsigned, std::vector< > > instead of std::vector< >.

The prologue for a lto'ed image can be as big as 93K. Duplicating 93K for each
compile unit causes a huge increase of debug info. With this patch, each
prologue will only emit the files required by the compile unit.

rdar://problem/13342023

llvm-svn: 176605

update testcase accordingly to give the correct name to the cu.

llvm-svn: 175934

option "generate-dwarf-pubnames" to control it, set to "false" by default.

llvm-svn: 174981

line table entries in assembly.

llvm-svn: 174785

syms before constructing the compile units so we're not emitting
section references to sections not there already.

llvm-svn: 174663

units coming in.

llvm-svn: 174548

llvm-svn: 174547

Failure: undefined symbol 'Lline_table_start0'.
Root-cause: we use a symbol subtraction to calculate at_stmt_list, but
the line table entries are not dumped in the assembly.
Fix: use zero instead of a symbol subtraction for Compile Unit 0.

llvm-svn: 174479

We generate one line table for each compilation unit in the object file.
Reviewed by Eric and Kevin.

rdar://problem/13067005

llvm-svn: 174445

for the first compile unit.

llvm-svn: 174352

DWARF5 split dwarf proposal.

llvm-svn: 174350

We used to create children DIEs for a scope, then check whether ScopeDIE is
null. If ScopeDIE is null, the children DIEs will be dangling. Other DIEs can
link to those dangling DIEs, which are not emitted at all, causing dwarf error.

The current testing case is 4k lines, from MultiSource/BenchMark/McCat/09-vor.

rdar://problem/13071959

llvm-svn: 174084

llvm-svn: 173698

changing both the string of the dwo_name to be correct and the type of
the statement list.

Testcases all around.

llvm-svn: 172699

emitting the dwarf32 version of DW_FORM_sec_offset and correct
disassembler support.

llvm-svn: 172698

using the DW_FORM_GNU_addr_index and a separate .debug_addr section which
stays in the executable and is fully linked.

Sneak in two other small changes:

a) Print out the debug_str_offsets.dwo section.
b) Change form we're expecting the entries in the debug_str_offsets.dwo
   section to take from ULEB128 to U32.

Add tests for all of this in the fission-cu.ll test.

llvm-svn: 172578

address space. Reordered the EmitULEB128IntValue arguments to
make this easier.

llvm-svn: 171949

them.

llvm-svn: 171933

them and add one where it seemed obvious that we wanted one.

llvm-svn: 171932

llvm-svn: 171905

llvm-svn: 171803

proposal. This leaves the strings in the skeleton die as strp,
but in all dwo files they're accessed now via DW_FORM_GNU_str_index.

Add support for dumping these sections and modify the fission-cu.ll
testcase to have the correct strings and form. Fix a small bug
in the fixed form sizes routine that involved out of array accesses
for the table and add a FIXME in the extractFast routine to fix
this up.

llvm-svn: 171779

into their new header subdirectory: include/llvm/IR. This matches the
directory structure of lib, and begins to correct a long standing point
of file layout clutter in LLVM.

There are still more header files to move here, but I wanted to handle
them in separate commits to make tracking what files make sense at each
layer easier.

The only really questionable files here are the target intrinsic
tablegen files. But that's a battle I'd rather not fight today.

I've updated both CMake and Makefile build systems (I think, and my
tests think, but I may have missed something).

I've also re-sorted the includes throughout the project. I'll be
committing updates to Clang, DragonEgg, and Polly momentarily.

llvm-svn: 171366

per compile unit/skeleton compile unit. Update tests accordingly.

llvm-svn: 171133

llvm-svn: 170771

into the DwarfUnits class.

llvm-svn: 170770

the abbreviations. Part of implementing split dwarf.

llvm-svn: 170589

Make emitDIE public accordingly. No functional change.

llvm-svn: 170258

llvm-svn: 170257

section to help prep some code to be split about.

llvm-svn: 170088

llvm-svn: 169907

controls each of the abbreviation sets (only a single one at the
moment) and computes offsets separately as well for each set
of DIEs.

No real function change, ordering of abbreviations for the skeleton
CU changed but only because we're computing in a separate order. Fix
the testcase not to care.

llvm-svn: 169793

llvm-svn: 169779

going on and makes a lot of the terminology in comments make more sense.

llvm-svn: 169758

llvm-svn: 169757

llvm-svn: 169756

llvm-svn: 169315

This reapplies the fix for PR13303 now with more justification. Based on my
execution of the GDB 7.5 test suite this results in:

expected passes: 16101 -> 20890 (+30%)
unexpected failures: 4826 -> 637 (-77%)

There are 23 checks that used to pass and now fail. They are all in
gdb.reverse. Investigating a few looks like they were accidentally passing
due to extra breakpoints being set by this bug. They're generally due to the
difference in end location between gcc and clang, the test suite is trying to
set breakpoints on the closing '}' that clang doesn't associate with any
instructions.

llvm-svn: 169304

Thanks Eric for the review.

llvm-svn: 169142