search for: abi_or_pref

On Mon, 22 May 2017, Dr. ERDI Gergo wrote: > Actually, tracking down the sequence of function calls, it turns out that '8' > is ultimately coming from the following call in DataLayout::getAlignment: > > getAlignmentInfo(AGGREGATE_ALIGN, 0, abi_or_pref, Ty); > > this seems to return 8 with the following datalayout string: > > e-S8:p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8 > > I think my problem is that 'a:8' probably doesn't mean what I think it should > mean. What is the difference between 'a:8' a...

On Mon, 22 May 2017, Krzysztof Parzyszek via llvm-dev wrote: > Probably from LargeArrayMinWidth/LargeArrayAlign settings in Targets.cpp (in > clang). Wait what? In clang? But my input is already LLVM IR. MF->getDataLayout().getPrefTypeAlignment(Ty) must be basing its answer on either something in the IR file, or in the target implementation, but clang is not really in the picture.

...ment_end(); i != e; ++i) { + Size = std::max(Size, getTypeSizeInBits(*i)); + } + return Size; + } case Type::IntegerTyID: return cast<IntegerType>(Ty)->getBitWidth(); case Type::VoidTyID: @@ -516,6 +525,17 @@ unsigned Align = getAlignmentInfo(AGGREGATE_ALIGN, 0, abi_or_pref, Ty); return std::max(Align, (unsigned)Layout->getAlignment()); } + case Type::UnionTyID: { + const UnionType *UnTy = cast<UnionType>(Ty); + unsigned Align = 1; + + // Unions need the maximum alignment of all their entries + for (UnionType::element_iterator i = UnTy-&g...

Hello, I noticed a bit of a gap in the current code for unions: a ConstantUnion cannot be written out to .ll. Hopefully I'm not stepping on Talin's toes by posting this, it's a fairly straightforward adaptation of the code for structs just above. Tim. -- The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336. --------------

...May 2017, Dr. ERDI Gergo wrote: >> >> Actually, tracking down the sequence of function calls, it turns out that >>> '8' is ultimately coming from the following call in >>> DataLayout::getAlignment: >>> >>> getAlignmentInfo(AGGREGATE_ALIGN, 0, abi_or_pref, Ty); >>> >>> this seems to return 8 with the following datalayout string: >>> >>> e-S8:p:16:8-i8:8-i16:8-i32:8-i64:8-f32:8-f64:8-n8-a:8 >>> >>> I think my problem is that 'a:8' probably doesn't mean what I think it >>> shou...