[PATCH] D68902: [WebAssembly] Trapping fptoint builtins and intrinsics

[Thomas Lively via Phabricator via cfe-commits]

tlively created this revision.
tlively added a reviewer: aheejin.
Herald added subscribers: llvm-commits, cfe-commits, sunfish, hiraditya, jgravelle-google, sbc100, dschuff.
Herald added projects: clang, LLVM.

The WebAssembly backend lowers fptoint instructions to a code sequence
that checks for overflow to avoid traps because fptoint is supposed to
be speculatable. These new builtins and intrinsics give users a way to
depend on the trapping semantics of the underlying instructions and
avoid the extra code generated normally.

Patch by coffee and tlively.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D68902

Files:
  clang/include/clang/Basic/BuiltinsWebAssembly.def
  clang/lib/CodeGen/CGBuiltin.cpp
  clang/test/CodeGen/builtins-wasm.c
  llvm/include/llvm/IR/IntrinsicsWebAssembly.td
  llvm/lib/Target/WebAssembly/WebAssemblyInstrConv.td
  llvm/test/CodeGen/WebAssembly/conv-trap.ll

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