File: x86-crc32-demanded.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (17 lines) | stat: -rw-r--r-- 435 bytes parent folder | download | duplicates (27) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
; RUN: opt < %s -instcombine -S | FileCheck %s

; crc32 with 64-bit destination zeros high 32-bit.
; rdar://9467055

define i64 @test() nounwind {
entry:
; CHECK: test
; CHECK: tail call i64 @llvm.x86.sse42.crc32.64.64
; CHECK-NOT: and
; CHECK: ret
  %0 = tail call i64 @llvm.x86.sse42.crc32.64.64(i64 0, i64 4) nounwind
  %1 = and i64 %0, 4294967295
  ret i64 %1
}

declare i64 @llvm.x86.sse42.crc32.64.64(i64, i64) nounwind readnone