llvm/test/CodeGen/AArch64/vscale-power-of-two.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=aarch64 -mattr=+sve -verify-machineinstrs < %s | FileCheck %s

define i64 @vscale_lshr(i64 %TC) {
; CHECK-LABEL: vscale_lshr:
; CHECK:       // %bb.0:
; CHECK-NEXT:    rdvl x8, #1
; CHECK-NEXT:    lsr x8, x8, #4
; CHECK-NEXT:    lsr x8, x8, #3
; CHECK-NEXT:    sub x8, x8, #1
; CHECK-NEXT:    and x0, x0, x8
; CHECK-NEXT:    ret
  %vscale = call i64 @llvm.vscale.i64()
  %shifted = lshr i64 %vscale, 3
  %urem = urem i64 %TC, %shifted
  ret i64 %urem
}

define i64 @vscale(i64 %TC) {
; CHECK-LABEL: vscale:
; CHECK:       // %bb.0:
; CHECK-NEXT:    rdvl x8, #1
; CHECK-NEXT:    lsr x8, x8, #4
; CHECK-NEXT:    sub x8, x8, #1
; CHECK-NEXT:    and x0, x0, x8
; CHECK-NEXT:    ret
  %vscale = call i64 @llvm.vscale.i64()
  %urem = urem i64 %TC, %vscale
  ret i64 %urem
}

define i64 @vscale_shl(i64 %TC) {
; CHECK-LABEL: vscale_shl:
; CHECK:       // %bb.0:
; CHECK-NEXT:    cnth x8
; CHECK-NEXT:    sub x8, x8, #1
; CHECK-NEXT:    and x0, x0, x8
; CHECK-NEXT:    ret
  %vscale = call i64 @llvm.vscale.i64()
  %shifted = shl i64 %vscale, 3
  %urem = urem i64 %TC, %shifted
  ret i64 %urem
}

declare i64 @llvm.vscale.i64()