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31 Commits

Author SHA1 Message Date
Yaron Keren 188cafb030 CXXInfo memory should be released after calling the destructor 
instead of before. The wrong order had no effect since Deallocate() 
does nothing right now, but we may replace allocator in the future.

llvm-svn: 209567
 2014-05-24 07:19:25 +00:00
Craig Topper 36250ad632 [C++11] Use 'nullptr'. AST edition. 
llvm-svn: 208517
 2014-05-12 05:36:57 +00:00
Warren Hunt d640d7d96e [ms-abi] Refactor Microsoft Record Layout 
This patch refactors microsoft record layout to be more "natural".  The 
most dominant change is that vbptrs and vfptrs are injected after the 
fact.  This simplifies the implementation and the math for the offest 
for the first base/field after the vbptr.

llvm-svn: 198818
 2014-01-09 00:30:56 +00:00
Warren Hunt 049f673dae [MS-ABI] Fix alias-avoidance padding between bases 
Adds padding between bases or virtual bases in an attempt to avoid 
aliasing of zero-sized sub-objects.  The approach used by the ABI adds 
two more bits of state.  Detailed comments are in the code.  Test cases 
included.

Differential Revision: http://llvm-reviews.chandlerc.com/D2258

llvm-svn: 196602
 2013-12-06 19:54:25 +00:00
Warren Hunt 7b252d24ad Support MS-ABI's concept of "Required Alignment" imposed by 
__declspec(align())

This patch implements required alignment in a way that makes 
__declspec(align()) and #pragma pack play correctly together. In the 
MS-ABI, __declspec(align()) is a hard rule and cannot be overridden by 
#pragma pack. This cases each record to have two interesting alignments 
"preferred alignment" (which matches Itanium's concept of alignment) and 
"required alignment" which is an alignment that must never be violated, 
even in the case of #pragma pack. This patch introduces the concept of 
Required Alignment to the record builder and tracks/uses it 
appropriately. Test cases are included.

Differential Revision: http://llvm-reviews.chandlerc.com/D2283

llvm-svn: 196549
 2013-12-06 00:01:17 +00:00
Warren Hunt 486e71460d No functional change. Renaming a variable in RecordLayoutBuilder and 
improving comments to make documentation more accurate.

Differential Revision:http://llvm-reviews.chandlerc.com/D2172

llvm-svn: 194609
 2013-11-13 22:16:13 +00:00
Timur Iskhodzhanov 2c9341f979 Thread the info about vbptr sharing through ASTRecordLayout 
Reviewed at http://llvm-reviews.chandlerc.com/D2120

llvm-svn: 194256
 2013-11-08 11:45:35 +00:00
Warren Hunt 8f8bad723d Adds Microsoft compatiable C++ record layout code to clang. 
llvm-svn: 192494
 2013-10-11 20:19:00 +00:00
John McCall 359b885e12 First pass at abstracting out a class for the target C++ ABI. 
llvm-svn: 173514
 2013-01-25 22:30:49 +00:00
Benjamin Kramer 2ef3031496 Remove get(V)BaseClassOffsetInBits, the CharUnit functions should be used instead. 
No functionality change.

llvm-svn: 159719
 2012-07-04 18:45:14 +00:00
John McCall e42a336604 Add support for laying out vtordisps according to our current 
working knowledge of the Microsoft ABI.  Based on a patch by
Dmitry Sokolov.

llvm-svn: 155905
 2012-05-01 08:55:32 +00:00
Eli Friedman 43114f9084 More ASTRecordLayout changes for MS ABI; based on patch by r4start. 
llvm-svn: 142694
 2011-10-21 22:49:56 +00:00
Eli Friedman 84d2d3a90e Some changes to improve compatibility for MSVC-style C++ struct layout. Patch from r4start at gmail.com (with some minor modifications by me). 
llvm-svn: 140623
 2011-09-27 19:12:27 +00:00
Ken Dyck 7ad11e70b6 Convert RecordLayout::Alignment to CharUnits from bit units. No change in 
functionality intended. 

llvm-svn: 125549
 2011-02-15 02:32:40 +00:00
Ken Dyck d5090c16f8 Convert RecordLayout::DataSize to CharUnits from bits, eliminating two 
unnecessary calls to RoundUpToAlignment. No changes to functionality
intended.

llvm-svn: 125356
 2011-02-11 02:20:09 +00:00
Ken Dyck c8ae55050d Convert RecordLayout::Size to CharUnits from bits. No changes to 
functionality intended.

llvm-svn: 125156
 2011-02-09 01:59:34 +00:00
Ken Dyck bec0285d7f Convert RecordLayout::NonVirtualAlign to CharUnits. No change in 
functionality intended.

llvm-svn: 125069
 2011-02-08 02:02:47 +00:00
Ken Dyck 316d6f69bc Convert RecordLayout::NonVirtualSize from bit units to CharUnits. 
llvm-svn: 124646
 2011-02-01 01:52:10 +00:00
Jay Foad 39c7980772 PR3558: mark "logically const" accessor methods in ASTContext as const, 
and mark the fields they use as mutable. This allows us to remove a few
const_casts.

llvm-svn: 123314
 2011-01-12 09:06:06 +00:00
Anders Carlsson 19bda8af16 Remove the PrimaryBaseInfo class. 
llvm-svn: 120134
 2010-11-24 23:20:19 +00:00
Anders Carlsson 7f95cd1817 Rename RecordLayout::getPrimaryBaseWasVirtual to isPrimaryBaseVirtual. 
llvm-svn: 120133
 2010-11-24 23:12:57 +00:00
Anders Carlsson 3f01871647 Port over a couple of getVBaseClassOffsetInBits call sites to use getVBaseClassOffset instead. 
llvm-svn: 117882
 2010-10-31 23:45:59 +00:00
Anders Carlsson fd88a6160d Rename getBaseClassOffset to getBaseClassOffsetInBits and introduce a getBaseClassOffset which returns the offset in CharUnits. Do the same thing for getVBaseClassOffset. 
llvm-svn: 117881
 2010-10-31 23:22:37 +00:00
Anders Carlsson 28466ab8f4 EmptyObjectMap now uses CharUnits wherever possible. 
llvm-svn: 117877
 2010-10-31 22:13:23 +00:00
Argyrios Kyrtzidis 96dbfa2e65 Plug leak. The DenseMaps of CXXRecordLayoutInfo weren't freed. 
llvm-svn: 112006
 2010-08-25 00:32:19 +00:00
Anders Carlsson d20e7cd3c6 No need to use the PrimaryBaseInfo struct in the builder. 
llvm-svn: 104681
 2010-05-26 05:20:58 +00:00
Anders Carlsson 2357bfd9d0 Add a SizeOfLargestEmptySubobject member to ASTRecordLayout. For C++ classes this will hold the largest empty subobject or 0 if the class doesn't have any empty subobjects. 
llvm-svn: 103359
 2010-05-08 22:35:05 +00:00
Anders Carlsson 6a84889d3f Replace the class offset vectors in RecordLayoutBuilder with maps instead so we'll have faster lookup and so we can detect duplicates. 
llvm-svn: 98231
 2010-03-11 04:10:39 +00:00
Anders Carlsson 09db5370b7 Assert that primary bases always have offset 0. 
llvm-svn: 98223
 2010-03-11 01:49:18 +00:00
Benjamin Kramer bbf5c262ab Replace copy loops with memcpy. 
llvm-svn: 98055
 2010-03-09 12:53:38 +00:00
Ted Kremenek c3015a914f Allocate ASTRecordLayout objects using the allocator associated with ASTContext. 
This allows them to be allocated using a BumpPtrAllocated
in the common case.

llvm-svn: 97978
 2010-03-08 20:56:29 +00:00