tree 5175a2a13a5a1f0fbf2910581cee6db4399bbd7d
parent 485aed52434a3af6f8dfa4adc80e785c573e9fa2
author Kristina Bessonova <kbessonova@accesssoftek.com> 1638785949 +0200
committer Copybara-Service <copybara-worker@google.com> 1638786387 -0800

[clang][DebugInfo] Allow function-local statics and types to be scoped within a lexical block

This is almost a reincarnation of https://reviews.llvm.org/D15977 originally
implemented by Amjad Aboud. It was discussed on llvm-dev [0], committed
with its backend counterpart [1], but finally reverted [2].

This patch makes clang to emit debug info for function-local static variables,
records (classes, structs and unions) and typdefs correctly scoped if
those function-local entites defined within a lexical (bracketed) block.

Before this patch, clang emits all those entities directly scoped in
DISubprogram no matter where they were really defined, causing
debug info loss (reported several times in [3], [4], [5]).

[0] https://lists.llvm.org/pipermail/llvm-dev/2015-November/092551.html
[1] https://reviews.llvm.org/rG30e7a8f694a19553f64b3a3a5de81ce317b9ec2f
[2] https://reviews.llvm.org/rGdc4531e552af6c880a69d226d3666756198fbdc8
[3] https://bugs.llvm.org/show_bug.cgi?id=19238
[4] https://bugs.llvm.org/show_bug.cgi?id=23164
[5] https://bugs.llvm.org/show_bug.cgi?id=44695

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D113743

GitOrigin-RevId: e403f4fdc88322201040f2bee7b328e8a78e2f7f