tree 5f005ead97bfb03be24d69a107025a9aa38c6d9c
parent 0ec0375a8c58d51da13981254d22011a10acc0b7
author Thomas Lively <tlively@google.com> 1618422164 -0700
committer Copybara-Service <copybara-worker@google.com> 1618600300 -0700

[WebAssembly] Codegen for f64x2.convert_low_i32x4_{s,u}

Add a custom DAG combine and ISD opcode for detecting patterns like

  (uint_to_fp (extract_subvector ...))

before the extract_subvector is expanded to ensure that they will ultimately
lower to f64x2.convert_low_i32x4_{s,u} instructions. Since these instructions
are no longer prototypes and can now be produced via standard IR, this commit
also removes the target intrinsics and builtins that had been used to prototype
the instructions.

Differential Revision: https://reviews.llvm.org/D100425

GitOrigin-RevId: af7925b4dd6519ebf0126ac8a18d791eb26968c9