File: x86-crc32-demanded.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (17 lines) | stat: -rw-r--r-- 442 bytes parent folder | download | duplicates (13)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
; RUN: opt < %s -passes=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