[PATCH] D52586: [X86] Add the movbe instruction intrinsics from icc.

[Craig Topper via Phabricator via cfe-commits]

craig.topper created this revision.
craig.topper added reviewers: spatel, RKSimon.

These intrinsics exist in icc. They can be found on the Intel Intrinsics Guide website.

All the backend support is in place to pattern match a load+bswap or a bswap+store pattern to the MOVBE instructions. So we just need to get the frontend to emit the correct IR. The pointer arguments in icc are declared as void so I had to jump through a packed struct to forcing a specific alignment on the load/store. Same trick we use in the unaligned vector load/store intrinsics


https://reviews.llvm.org/D52586

Files:
  lib/Basic/Targets/X86.cpp
  lib/Headers/immintrin.h
  test/CodeGen/movbe-builtins.c

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