[PATCH] D62210: [WebAssembly] Implement __builtin_return_address for emscripten

[Guanzhong Chen via Phabricator via llvm-commits]

quantum created this revision.
quantum added reviewers: tlively, aheejin.
Herald added subscribers: llvm-commits, sunfish, hiraditya, jgravelle-google, sbc100, dschuff.
Herald added a project: LLVM.

In this patch, `ISD::RETURNADDR` is lowered on the emscripten target
to the new Emscripten runtime function `emscripten_return_address`, which
implements the functionality.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D62210

Files:
  llvm/include/llvm/IR/RuntimeLibcalls.def
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.cpp
  llvm/lib/Target/WebAssembly/WebAssemblyISelLowering.h
  llvm/lib/Target/WebAssembly/WebAssemblyRuntimeLibcallSignatures.cpp
  llvm/test/CodeGen/WebAssembly/return-address.ll

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