| Commit message (Collapse) | Author | Age | Files | Lines | |
|---|---|---|---|---|---|
| * | DebugInfo: Do not emit empty CUs | David Blaikie | 2017-05-26 | 1 | -35/+37 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Consistent with GCC and addresses a shortcoming with ThinLTO where many imported CUs may end up being empty (because the functions imported from them either ended up not being used (and were then discarded, since they're imported as available_externally) or optimized away entirely). Test cases previously testing empty CUs (either intentionally, or because they didn't need anything more complicated) had a trivial 'int' or similar basic type added to their retained types list. This is a first order approximation - a deeper implementation could do things like: 1) Be more lazy about construction of the CU - for example if two CUs containing a single identical retained type are linked together, with this change one of the two CUs will be produced but empty (since a duplicate type won't be produced). 2) Go further and invert all the CU links the same way the subprogram link is inverted - keep named CU lists of retained types, macros, etc, and have those link back to the CU. Then if they're emitted, the CU is emitted, but never otherwise - this would allow the metadata itself to be dropped earlier too, though it seems unlikely that's an important optimization as there shouldn't be many CUs relative to the number of other entities. llvm-svn: 304020 | ||||
| * | [PR27284] Reverse the ownership between DICompileUnit and DISubprogram. | Adrian Prantl | 2016-04-15 | 1 | -3/+3 |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446 | ||||
| * | testcase gardening: update the emissionKind enum to the new syntax. (NFC) | Adrian Prantl | 2016-04-01 | 1 | -3/+3 |
| | | | | | llvm-svn: 265081 | ||||
| * | Added support for macro emission in dwarf (supporting DWARF version 4). | Amjad Aboud | 2016-01-07 | 1 | -0/+67 |
| Differential Revision: http://reviews.llvm.org/D15495 llvm-svn: 257060 | |||||
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index : bcm5719-llvm | |
| Project Ortega BCM5719 LLVM | Raptor Computing Systems |
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