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Thomas Lively c1efe42723 [WebAssembly] Initialize memory in start function

Summary:
 - `__wasm_init_memory` is now the WebAssembly start function instead
   of being called from `__wasm_call_ctors` or called directly by the
   runtime.
 - Adds a new synthetic data symbol `__wasm_init_memory_flag` that is
   atomically incremented from zero to one by the thread responsible
   for initializing memory.
 - All threads now unconditionally perform data.drop on all passive
   segments.
 - Removes --passive-segments and --active-segments flags and controls
   segment type based on --shared-memory instead. The deleted flags
   were only present to ameliorate the upgrade path in Emscripten.

Reviewers: sbc100, aheejin

Subscribers: dschuff, jgravelle-google, sunfish, jfb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D65783

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370965 91177308-0d34-0410-b5e6-96231b3b80d8

2019-09-04 19:50:39 +00:00

ELFRelocs

[AARCH64] Switch relocations R_AARCH64_TLS_TPREL64 and R_AARCH64_DTPMOD64

2019-07-31 14:42:57 +00:00

AMDGPUMetadataVerifier.h

[AMDGPU] Switched HSA metadata to use MsgPackDocument

2019-03-13 18:55:50 +00:00

COFF.h

[COFF] Reduce the size of Chunk and SectionChunk, NFC

2019-04-02 22:11:58 +00:00

Dwarf.def

[Dwarf] Complete the list of type tags.