This commit ensures DIEs are constructed within a compile unit and
immediately added to their parents.

Reviewed off-list by Eric.

llvm-svn: 193568

More patches will be submitted to convert "new DIE(" to use createAddAndDIE in
DwarfCompileUnit.cpp. This will simplify implementation of addDIEEntry where
we have to decide between ref4 and ref_addr, because DIEs that can be shared
across CU will be added to a CU already.

Reviewed off-list by Eric.

llvm-svn: 193567

It wraps around "new DIE(" and handles the bookkeeping part of the newly-created
DIE. It adds the DIE to its parent, and calls insertDIE if necessary. It makes
sure that bookkeeping is done at the earliest time and we should not see
parentless DIEs if all constructions of DIEs go through this helper function.

Later on, we can use an allocator for DIE allocation, and will only need to
change createAndAddDIE instead of modifying all the "new DIE(".

Reviewed off-list by Eric.

llvm-svn: 193566

__ImageBase is an absolute symbol whose address is the same as the image base
address. What we did before this patch was to create __ImageBase symbol as a
symbol whose *contents* (not location) is the image base address, which is
clearly wrong.

llvm-svn: 193565

This commit reimplements the TypeImpl class (the class that backs SBType) in terms of a static,dynamic type pair

This is useful for those cases when the dynamic type of an ObjC variable can only be obtained in terms of an "hollow" type with no ivars
In that case, we could either go with the static type (+iVar information) or with the dynamic type (+inheritance chain)

With the new TypeImpl implementation, we try to combine these two sources of information in order to extract as much information as possible
This should improve the functionality of tools that are using the SBType API to do extensive dynamic type inspection

llvm-svn: 193564

Complicated CU-DIE-specific logic in the latter was never used,
and it makes sense to have safety checks for broken dwarf in the former.

llvm-svn: 193563

llvm-svn: 193562

llvm-svn: 193561

DWARF parser: Use ArrayRef to represent form sizes and simplify DWARFDIE::extractFast() interface. No functionality change.

llvm-svn: 193560

llvm-mcmarkup, obj2yaml and yaml2obj were missing from the substitutions list,
causing the test suite to fail in a sandboxed environment.

llvm-svn: 193559

llvm-svn: 193558

llvm-svn: 193557

This change has no effect now, but will be needed to emit BSS atoms
to .bss section.

llvm-svn: 193556

llvm-svn: 193555

This reverts commit r193528 (and fixes).

It broke Chandler's setup.

llvm-svn: 193554

Summary:
Use DWARF4 table of form classes to fetch attributes from DIE
in a more consistent way. This shouldn't change the functionality and
serves as a refactoring for upcoming change: DW_AT_high_pc has different
semantics depending on its form class.

Reviewers: dblaikie, echristo

Reviewed By: echristo

CC: echristo, llvm-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1961

llvm-svn: 193553

llvm-svn: 193552

llvm-svn: 193551

llvm-svn: 193550

  requires ! feature

The purpose of this is to allow (for instance) the module map for /usr/include
to exclude <tgmath.h> and <complex.h> when building in C++ (these headers are
instead provided by the C++ standard library in this case, and the glibc C
<tgmath.h> header would otherwise try to include <complex.h>, resulting in a
module cycle).

llvm-svn: 193549

llvm-svn: 193548

llvm-svn: 193547

llvm-svn: 193546

statement (after a case label, if, etc). Patch by Olivier Goffart!

llvm-svn: 193545

llvm-svn: 193544

llvm-svn: 193543

llvm-svn: 193542

llvm-svn: 193541

No functionality change.

llvm-svn: 193540

llvm-svn: 193539

llvm-svn: 193538

llvm-svn: 193537

llvm-svn: 193536

an MCExpr, in order to avoid writing an encoded zero value in the immediate
field.

When getUnconditionalBranchTargetOpValue is called with an MCExpr target, we
don't know what the final immediate field value should be. We shouldn't
explicitly set the immediate field to an encoded zero value as zero is encoded
with a non-zero bit pattern. This leads to bits being set that pollute the
final immediate value. The nature of the encoding is such that the polluted
bits only affect very large immediate values, explaining why this hasn't
caused problems earlier.

Fixes <rdar://problem/15155975>.

llvm-svn: 193535

llvm-svn: 193534

llvm-svn: 193533

llvm-svn: 193532

<rdar://problem/15208799>

llvm-svn: 193530

llvm-svn: 193529

With this patch we correctly determine that ubuntu's ARM tree is not biarch
and use "lib" istead of "lib32".

Without this patch the search inside the arm tree for the crt files was failing
and we would end up trying to use the i686 ones in lib32.

llvm-svn: 193528