[PATCH] D105935: [AArch64][GlobalISel] Legalize bswap <2 x i16>

[Jon Roelofs via Phabricator via llvm-commits]

jroelofs updated this revision to Diff 358783.
jroelofs retitled this revision from "WIP: [AArch64][GlobalISel] Legalize bswap <2 x i16>" to "[AArch64][GlobalISel] Legalize bswap <2 x i16>".
jroelofs added a comment.

SDAG:

  $ ./bin/llc -global-isel=0 -global-isel-abort=1 bswap.ll -mtriple=arm64-apple-ios -o -
  	.section	__TEXT,__text,regular,pure_instructions
  	.globl	_test1                          ; -- Begin function test1
  	.p2align	2
  _test1:                                 ; @test1
  	.cfi_startproc
  ; %bb.0:
  	ld1.h	{ v0 }[0], [x0]
  	add	x8, x0, #2                      ; =2
  	ld1.h	{ v0 }[2], [x8]
  	rev32.8b	v0, v0
  	ushr.2s	v0, v0, #16
  	mov.s	w8, v0[1]
  	fmov	w9, s0
  	strh	w9, [x0]
  	strh	w8, [x0, #2]
  	ret
  	.cfi_endproc
                                          ; -- End function
  .subsections_via_symbols

GISel:

  $ ./bin/llc -global-isel=1 -global-isel-abort=1 bswap.ll -mtriple=arm64-apple-ios -o -
  	.section	__TEXT,__text,regular,pure_instructions
  	.globl	_test1                          ; -- Begin function test1
  	.p2align	2
  _test1:                                 ; @test1
  	.cfi_startproc
  ; %bb.0:
  	ldr	h0, [x0]
  	ldr	h1, [x0, #2]
  	mov.h	v0[1], v1[0]
  	rev32.8b	v0, v0
  	ushr.2s	v0, v0, #16
  	mov	h1, v0[1]
  	str	h0, [x0]
  	str	h1, [x0, #2]
  	ret
  	.cfi_endproc
                                          ; -- End function
  .subsections_via_symbols


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D105935/new/

https://reviews.llvm.org/D105935

Files:
  llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.cpp
  llvm/lib/Target/AArch64/GISel/AArch64LegalizerInfo.h
  llvm/test/CodeGen/AArch64/GlobalISel/legalize-bswap.mir
  llvm/test/CodeGen/AArch64/GlobalISel/legalizer-info-validation.mir

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