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2011-11-07Add a new dwarf accelerator table prototype with the goal of replacingEric Christopher
the pubnames and pubtypes tables. LLDB can currently use this format and a full spec is forthcoming and submission for standardization is planned. A basic summary: The dwarf accelerator tables are an indirect hash table optimized for null lookup rather than access to known data. They are output into an on-disk format that looks like this: .-------------. | HEADER | |-------------| | BUCKETS | |-------------| | HASHES | |-------------| | OFFSETS | |-------------| | DATA | `-------------' where the header contains a magic number, version, type of hash function, the number of buckets, total number of hashes, and room for a special struct of data and the length of that struct. The buckets contain an index (e.g. 6) into the hashes array. The hashes section contains all of the 32-bit hash values in contiguous memory, and the offsets contain the offset into the data area for the particular hash. For a lookup example, we could hash a function name and take it modulo the number of buckets giving us our bucket. From there we take the bucket value as an index into the hashes table and look at each successive hash as long as the hash value is still the same modulo result (bucket value) as earlier. If we have a match we look at that same entry in the offsets table and grab the offset in the data for our final match. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143921 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Expose a way to get the beginning of the dwarf string section.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143920 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Fix up comment.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143919 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-07Typo.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143918 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-05Add an option to pad an uleb128 to MCObjectWriter and remove the uleb128 ↵Benjamin Kramer
encoding from the DWARF asm printer. As a side effect we now print dwarf ulebs with .ascii directives. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143809 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-05Add more PRI.64 macros for MSVC and use them throughout the codebase.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143799 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-04Emit declarations before definitions if they are available. This causes ↵Rafael Espindola
DW_AT_specification to point back in the file in the included testcase. Fixes PR11300. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143726 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-03build: Add initial cut at LLVMBuild.txt files.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143634 91177308-0d34-0410-b5e6-96231b3b80d8
2011-11-02Don't emit a directory entry for the value in DW_AT_comp_dir, that is alwaysNick Lewycky
implied by directory index zero. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143570 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Dwarf: [PR11022] Fix emitting DW_AT_const_value(>i64), to be ↵NAKAMURA Takumi
host-endian-neutral. Don't assume APInt::getRawData() would hold target-aware endianness nor host-compliant endianness. rawdata[0] holds most lower i64, even on big endian host. FIXME: Add a testcase for big endian target. FIXME: Ditto on CompileUnit::addConstantFPValue() ? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143194 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-28Always use the string pool, even when it makes the .o larger. This may helpNick Lewycky
tools that read the debug info in the .o files by making the DIE sizes more consistent. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143186 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-27Teach our Dwarf emission to use the string pool.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143097 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-26Reflow lines, fix comments for doxygen style, fix whitespace. No functionalityNick Lewycky
change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@143074 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Remove dead enum value. There is no DIESectionOffset.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142912 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-25Remove unused forward decl.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142892 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-18Missed a spot!Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142436 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-18Fix some typo/formatting issues. No functionality change.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142435 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17Minor style cleanup, no functionality change.Nick Lewycky
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142307 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-17Add support for a new extension to the .file directive:Nick Lewycky
.file filenumber "directory" "filename" This removes one join+split of the directory+filename in MC internals. Because bitcode files have independent fields for directory and filenames in debug info, this patch may change the .o files written by existing .bc files. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142300 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-16Twinify better.Benjamin Kramer
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142139 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-11Add a new wrapper node for a DILexicalBlock that encapsulates it and aEric Christopher
file. Since it should only be used when necessary propagate it through the backend code generation and tweak testcases accordingly. This helps with code like in clang's test/CodeGen/debug-info-line.c where we have multiple #line directives within a single lexical block and want to generate only a single block that contains each file change. Part of rdar://10246360 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141729 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-04Teach the MC to output code/data region marker labels in MachO and ELF ↵Owen Anderson
modes. These are used by disassemblers to provide better disassembly, particularly on targets like ARM Thumb that like to intermingle data in the TEXT segment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141135 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-03Whitespace.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141005 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-03Typo.Eric Christopher
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141004 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29Place this bracket according to the LLVM style.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140784 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-28A typeid of zero means a cleanup, not a catch. This case occursDuncan Sands
when there is both a catch and a cleanup. Correct the comment. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140686 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-26Fix emission of debug data for global variables. getContext() on ↵James Molloy
DIGlobalVariables is not valid any more. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140539 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-21Do not unnecessarily use AT_specification DIE because it does not add any value.Devang Patel
Few weeks ago, llvm completely inverted the debug info graph. Earlier each debug info node used to keep track of its compile unit, now compile unit keeps track of important nodes. One impact of this change is that the global variable's do not have any context, which should be checked before deciding to use AT_specification DIE. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140282 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-21Tidy up. Whitepsace.Jim Grosbach
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140275 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-14Add support to emit debug info for C++0x nullptr type.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139751 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-02Darwin wants ctors/dtors to be ordered the other way round to linux.Duncan Sands
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139015 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-01Don't drop alignment info on local common symbols.Benjamin Kramer
- On COFF the .lcomm directive has an alignment argument. - On ELF we fall back to .local + .comm Based on a patch by NAKAMURA Takumi. Fixes PR9337, PR9483 and PR10128. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138976 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-31Fix Size TypingDavid Greene
Stores sizes as uint64_t to avoid possible truncation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138901 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-31Compress Repeated Byte OutputDavid Greene
Emit a repeated sequence of bytes using .zero. This saves an enormous amount of asm file space for certain programs. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138864 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-28Fix PR5329: pay attention to constructor/destructor priorityDuncan Sands
when outputting them. With this, the entire LLVM testsuite passes when built with dragonegg. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138724 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-24Move TargetRegistry and TargetSelect from Target to Support where they belong.Evan Cheng
These are strictly utilities for registering targets and components. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138450 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-19Do not use named md nodes to track variables that are completely optimized. ↵Devang Patel
This does not scale while doing LTO with debug info. New approach is to include list of variables in the subprogram info directly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138145 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18add the comments of each declaration follow it, making it easier to read and ↵Renato Golin
compare to GCC's result. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138009 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18Eliminate unnecessary forwarding function.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138006 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18Add new DIE into the map asap.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137998 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-16Until now all debug info MDNodes referred to a root MDNode, a compile unit. ↵Devang Patel
This simplified handling of these needs in dwarf writer. However, one side effect of this is that during link time optimization all these MDNodes are _not_ uniqued. In other words there will be N number of MDNodes describing "int", "char" and all other types, which would suddenly grow when each object file starts using libraries like STL. MDNodes graph structure such that compiler unit keeps track of important MDNodes and update dwarf writer to process mdnodes top-down instead of bottom up. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137778 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-16Remove unused Target argument from AsmParser construction methods.Jim Grosbach
The argument is unused, and is a layering violation in any case. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137735 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-16Remove unnecessary version check.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137728 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Refactor.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137689 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Continue to hoist uses of getCompileUnit() up. The goal is to get rid of ↵Devang Patel
uses of getCompileUnit(). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137683 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15This is somewhat déjà-vu, but avoid using getCompileUnit() as much as ↵Devang Patel
possible. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137668 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Refactor. Variables are part of compile unit so let CompileUnit create new ↵Devang Patel
variable. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137663 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15There is no need to maintain a set to keep track of variables that use ↵Devang Patel
location expressions. In such cases, AT_location attribute's value will be a label. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137659 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Fix warning.Devang Patel
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137658 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-15Simplify. Let DbgVariable keep track of variable's DBG_VALUE machine ↵Devang Patel
instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137656 91177308-0d34-0410-b5e6-96231b3b80d8
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