[all-commits] [llvm/llvm-project] 15a5e8: [lld][WebAssembly] Allow `atomics` feature with un...

[Thomas Lively via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 15a5e86fb387359f736e919eeb5cc2b9f4477d48
      https://github.com/llvm/llvm-project/commit/15a5e86fb387359f736e919eeb5cc2b9f4477d48
  Author: Thomas Lively <tlively at google.com>
  Date:   2020-09-24 (Thu, 24 Sep 2020)

  Changed paths:
    M lld/test/wasm/shared-memory.yaml
    M lld/wasm/Writer.cpp

  Log Message:
  -----------
  [lld][WebAssembly] Allow `atomics` feature with unshared memory

 https://github.com/WebAssembly/threads/issues/144 updated the
WebAssembly threads proposal to make atomic operations on unshared memories
valid. This change updates the feature checking in the linker accordingly.
Production WebAssembly engines have recently been updated to allow this
behvaior, but after this change users who accidentally use atomics with unshared
memories on older versions of the engines will get validation errors at runtime
rather than link errors.

Differential Revision: https://reviews.llvm.org/D79530