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Author SHA1 Message Date
Derek Schuff 0a391060f1 [WebAssembly] Add Object and ObjectWriter support for wasm COMDAT sections 
Allow sections to be placed into COMDAT groups, in addtion to functions and data
segments.

Also make section symbols unnamed, which allows sections with identical names
(section names are independent of their section symbols, but previously we
gave the symbols the same name as their sections, which results in collisions
when sections are identically-named).

Differential Revision: https://reviews.llvm.org/D92691
 2020-12-07 12:12:44 -08:00
Derek Schuff 77973f8dee [WebAssembly] Add support for DWARF type units 
Since Wasm comdat sections work similarly to ELF, we can use that mechanism
    to eliminate duplicate dwarf type information in the same way.

    Differential Revision: https://reviews.llvm.org/D88603
 2020-10-28 17:41:22 -07:00
Derek Schuff 44eea0b1a7 Revert "[WebAssembly] Add support for DWARF type units" 
This reverts commit bcb8a119df.
 2020-10-27 17:57:32 -07:00
Derek Schuff bcb8a119df [WebAssembly] Add support for DWARF type units 
Since Wasm comdat sections work similarly to ELF, we can use that mechanism
to eliminate duplicate dwarf type information in the same way.

Differential Revision: https://reviews.llvm.org/D88603
 2020-10-27 17:13:41 -07:00