tree 98d91687e14f6326bea8a0cf5797c9862b6e0e95
parent cf5be82e4e94e80393187d268619566ef757d8d4
author Fedor Sergeev <fedor.sergeev@azul.com> 1539772583 +0000
committer Fedor Sergeev <fedor.sergeev@azul.com> 1539772583 +0000

[NewPM] teach -passes= to emit meaningful error messages

All the PassBuilder::parse interfaces now return descriptive StringError
instead of a plain bool. It allows to make -passes/aa-pipeline parsing
errors context-specific and thus less confusing.

TODO: ideally we should also make suggestions for misspelled pass names,
but that requires some extensions to PassBuilder.

Reviewed By: philip.pfaffe, chandlerc
Differential Revision: https://reviews.llvm.org/D53246

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@344685 91177308-0d34-0410-b5e6-96231b3b80d8