[llvm-dev] Link Struct to Metadata

[Hong Hu via llvm-dev]

Hi,

Given one structure type, is there any method to get the metadata that
describes the structure information?

For example:

%2 = getelementptr inbounds %"class.std::thread", %"class.std::thread"*
%this, i64 0, i32 0, i32 0, !dbg !2748

then I know the pointer operand type is class.std::thread. I want to find
the associated metadata of this type:

!217 = !DICompositeType(tag: DW_TAG_class_type, name: "thread", scope: !34,
file: !218, line: 60, size: 64, align: 64, elements: !219, identifier:
"_ZTSSt6thread")

The challenge is that the structure name is different in the IR
instruction, from the one in the metadata. One is  class.std::thread, while
another is _ZTSSt6thread.

Regards,
Hu Hong
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