[Lldb-commits] [PATCH] D145803: [clang][DebugInfo] Emit DW_AT_type of preferred name if available
Michael Buch via Phabricator via lldb-commits
lldb-commits at lists.llvm.org
Mon Mar 27 11:50:08 PDT 2023
Michael137 marked an inline comment as not done.
Michael137 added inline comments.
================
Comment at: clang/test/CodeGen/preferred_name.cpp:49
+
+ Foo<Foo<int>> varFooInt;
+
----------------
dblaikie wrote:
> Michael137 wrote:
> > probinson wrote:
> > > This doesn't become `Foo<BarInt>` ?
> > The name stays as `Foo<Foo<int>>` but the type of the template parameter becomes `BarInt`. So the dwarf would look like:
> > ```
> > DW_TAG_structure_type
> > DW_AT_name ("Foo<Foo<int> >")
> >
> > DW_TAG_template_type_parameter
> > DW_AT_type (0x00000095 "BarInt")
> > DW_AT_name ("T")
> >
> > ```
> > Will add the parameter metadata to the test
> Hmm, that seems buggy - why doesn't `Foo<Foo<int> >` become `Foo<BarInt>`? (is the preferred name ever used in the DW_AT_name? I'd have thought it should be unless it's explicitly avoided to ensure type compatibility/collapsing with debug info built without this feature enabled?)
I suspect it's because the name is constructed using the clang TypePrinter. And we turn off `PrintingPolicy::UsePreferredNames` by default to avoid divergence from GCC.
Will double check though
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D145803/new/
https://reviews.llvm.org/D145803
More information about the lldb-commits
mailing list