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path: root/lib/CodeGen/CGRecordLayout.h
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2013-01-02Rewrite #includes for llvm/Foo.h to llvm/IR/Foo.h as appropriate toChandler Carruth
reflect the migration in r171366. Re-sort the #include lines to reflect the new paths. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@171369 91177308-0d34-0410-b5e6-96231b3b80d8
2012-12-06Rework the bitfield access IR generation to address PR13619 andChandler Carruth
generally support the C++11 memory model requirements for bitfield accesses by relying more heavily on LLVM's memory model. The primary change this introduces is to move from a manually aligned and strided access pattern across the bits of the bitfield to a much simpler lump access of all bits in the bitfield followed by math to extract the bits relevant for the particular field. This simplifies the code significantly, but relies on LLVM to intelligently lowering these integers. I have tested LLVM's lowering both synthetically and in benchmarks. The lowering appears to be functional, and there are no really significant performance regressions. Different code patterns accessing bitfields will vary in how this impacts them. The only real regressions I'm seeing are a few patterns where the LLVM code generation for loads that feed directly into a mask operation don't take advantage of the x86 ability to do a smaller load and a cheap zero-extension. This doesn't regress any benchmark in the nightly test suite on my box past the noise threshold, but my box is quite noisy. I'll be watching the LNT numbers, and will look into further improvements to the LLVM lowering as needed. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@169489 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-15Use LLVM_DELETED_FUNCTION in place of 'DO NOT IMPLEMENT' comments.Dmitri Gribenko
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163983 91177308-0d34-0410-b5e6-96231b3b80d8
2012-06-27Propagate lvalue alignment into bitfields. Per report on cfe-dev.Eli Friedman
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159295 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-23clean up forward declarations of raw_ostream to use the new LLVM.hChris Lattner
patch by Jon Mulder! git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135851 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-20add raw_ostream and Twine to LLVM.h, eliminating a ton of llvm:: qualifications.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135577 91177308-0d34-0410-b5e6-96231b3b80d8
2011-07-09clang side to match the LLVM IR type system rewrite patch.Chris Lattner
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134831 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Convert AccessInfo::AccessAlignment to CharUnits. No change in functionalityKen Dyck
intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130087 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-24Convert CGBitFieldInfo::FieldByteOffset to CharUnits. No change inKen Dyck
functionality intended. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130085 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-15Perform zero-initialization of virtual base classes when emitting John McCall
a zero constant for a complete class. rdar://problem/8424975 To make this happen, track the field indexes for virtual bases in the complete object. I'm curious whether we might be better off making CGRecordLayoutBuilder *much* more reliant on ASTRecordLayout; we're currently duplicating an awful lot of the ABI layout logic. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@125555 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-30A CGRecordLayout object persists. Since its contained types mayJohn McCall
refer to opaque types, they must be held via PATypeHolders. I'm not sure why this hasn't blown up before. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120491 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-24CGRecordLayout types are always struct types.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120106 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-21Rename BaseLLVMType to NonVirtualBaseLLVMType.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119956 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-09Introduce the concept of a non-virtual base type to CGRecordLayoutBuilder as ↵Anders Carlsson
a first step towards fixing PR6995. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@118491 91177308-0d34-0410-b5e6-96231b3b80d8
2010-09-02IRgen: Move CGBitFieldInfo strategy computation helpers to static memberDaniel Dunbar
functions. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@112913 91177308-0d34-0410-b5e6-96231b3b80d8
2010-08-22Go back to asking CodeGenTypes whether a type is zero-initializable.John McCall
Make CGT defer to the ABI on all member pointer types. This requires giving CGT a handle to the ABI. It's way easier to make that work if we avoid lazily creating the ABI. Make it so. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@111786 91177308-0d34-0410-b5e6-96231b3b80d8
2010-05-18Keep track of the LLVM field numbers for non-virtual bases.Anders Carlsson
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104013 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-27Fix comments.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@102429 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15IRgen: Change CGBitFieldInfo to take the AccessInfo as constructor ↵Daniel Dunbar
arguments, it is now an immutable object. Also, add some checking of various invariants that should hold on the CGBitFieldInfo access. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101345 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-15IRgen: Eliminate now unused fields from CGBitFieldInfo.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101344 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-14IRgen: Tweak CGBitFieldInfo doxyments & add an accessor.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101221 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-13IRgen: Enhance CGBitFieldInfo with enough information to fully describe the ↵Daniel Dunbar
"policy" with which a bit-field should be accessed. - For now, these policies are computed to match the current IRgen strategy, although the new information isn't being used yet (except in -fdump-record-layouts). - Design comments appreciated. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101178 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-12IRgen: Add CGRecordLayout::dump, and dump (irgen) record layouts as part of ↵Daniel Dunbar
-fdump-record-layouts. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101051 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-08IRgen: Move the bit-field access type into CGBitFieldInfo, and change ↵Daniel Dunbar
bit-field LValues to just store the base address of object containing the bit-field. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100745 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-06IRgen: Move BitFieldIsSigned bit into CGBitFieldInfo.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100513 91177308-0d34-0410-b5e6-96231b3b80d8
2010-04-05IRgen: Lift BitFieldInfo to CGBitFieldInfo at namespace level.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@100433 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-31IRGen: Move the auxiliary data structures tracking AST -> LLVM mappings out ↵Daniel Dunbar
of CodeGenTypes, to per-record CGRecordLayout structures. - I did a cursory check that this was perf neutral, FWIW. git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99978 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-31IRGen: Hide CGRecordLayoutBuilder class, because I can.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99967 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-30IRgen: Move CGRecordLayout to its own happy little file.Daniel Dunbar
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@99945 91177308-0d34-0410-b5e6-96231b3b80d8
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