.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.

llvm-svn: 142300

llvm-svn: 142139

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

llvm-svn: 141729

Teach the MC to output code/data region marker labels in MachO and ELF 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.

llvm-svn: 141135

llvm-svn: 141005

llvm-svn: 141004

llvm-svn: 140784

when there is both a catch and a cleanup.  Correct the comment.

llvm-svn: 140686

Fix emission of debug data for global variables. getContext() on DIGlobalVariables is not valid any more.

llvm-svn: 140539

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.

llvm-svn: 140282

llvm-svn: 140275

llvm-svn: 139751

llvm-svn: 139015

- 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.

llvm-svn: 138976

Stores sizes as uint64_t to avoid possible truncation.

llvm-svn: 138901

Emit a repeated sequence of bytes using .zero.  This saves an enormous
amount of asm file space for certain programs.

llvm-svn: 138864

when outputting them.  With this, the entire LLVM testsuite
passes when built with dragonegg.

llvm-svn: 138724

These are strictly utilities for registering targets and components.

llvm-svn: 138450

Do not use named md nodes to track variables that are completely optimized. This does not scale while doing LTO with debug info. New approach is to include list of variables in the subprogram info directly.

llvm-svn: 138145

add the comments of each declaration follow it, making it easier to read and compare to GCC's result.

llvm-svn: 138009

llvm-svn: 138006

llvm-svn: 137998

Until now all debug info MDNodes referred to a root MDNode, a compile unit. 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.

llvm-svn: 137778

The argument is unused, and is a layering violation in any case.

llvm-svn: 137735

llvm-svn: 137728

llvm-svn: 137689

llvm-svn: 137683

llvm-svn: 137668

llvm-svn: 137663

There is no need to maintain a set to keep track of variables that use location expressions. In such cases, AT_location attribute's value will be a label.

llvm-svn: 137659

llvm-svn: 137658

llvm-svn: 137656

When a variable is inlined multiple places, abstract variable keeps name, location, type etc.. info and all other concreate instances of the variable directly refers to abstract variable.

llvm-svn: 137637

llvm-svn: 137632

llvm-svn: 137631

llvm-svn: 137621

llvm-svn: 137618

llvm-svn: 137485

llvm-svn: 137321

llvm-svn: 137283