[all-commits] [llvm/llvm-project] 8d396a: [WebAssembly] Support COMDAT sections in assembly ...

[Derek Schuff via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8d396acac3bc21f688ac707bb42e4698dbdcab7e
      https://github.com/llvm/llvm-project/commit/8d396acac3bc21f688ac707bb42e4698dbdcab7e
  Author: Derek Schuff <dschuff at chromium.org>
  Date:   2020-12-10 (Thu, 10 Dec 2020)

  Changed paths:
    M llvm/lib/MC/MCParser/WasmAsmParser.cpp
    M llvm/lib/MC/MCSectionWasm.cpp
    M llvm/lib/MC/WasmObjectWriter.cpp
    M llvm/lib/Target/WebAssembly/AsmParser/WebAssemblyAsmParser.cpp
    M llvm/test/MC/WebAssembly/comdat-sections.ll
    A llvm/test/MC/WebAssembly/comdat-sections.s
    M llvm/test/MC/WebAssembly/comdat.ll

  Log Message:
  -----------
  [WebAssembly] Support COMDAT sections in assembly syntax

This CL changes the asm syntax for section flags, making them more like ELF
(previously "passive" was the only option). Now we also allow "G" to designate
COMDAT group sections. In these sections we set the appropriate comdat flag on
function symbols, and also avoid auto-creating a new section for them.

This also adds asm-based tests for the changes D92691 to go along with
the direct-to-object tests.

Differential Revision: https://reviews.llvm.org/D92952
This is a reland of rG4564553b8d8a with a fix to the lit pipeline in
llvm/test/MC/WebAssembly/comdat.ll