File: cmpxchg-lse-even-regs.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (18 lines) | stat: -rw-r--r-- 954 bytes parent folder | download | duplicates (12) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
 
; RUN: llc -mtriple arm64-apple-ios -mattr=+lse %s -o - | FileCheck %s
; RUN: llc -mtriple arm64-apple-ios -mattr=+lse -mattr=+outline-atomics %s -o - | FileCheck %s

; Only "even,even+1" pairs are valid for CASP instructions. Make sure LLVM
; doesn't allocate odd ones and that it can copy them around properly. N.b. we
; don't actually check that they're sequential because FileCheck can't; odd/even
; will have to be good enough.
define void @test_atomic_cmpxchg_i128_register_shuffling(ptr %addr, i128 %desired, i128 %new) nounwind {
; CHECK-LABEL: test_atomic_cmpxchg_i128_register_shuffling:
; CHECK-DAG: mov [[DESIRED_LO:x[0-9]*[02468]]], x1
; CHECK-DAG: mov [[DESIRED_HI:x[0-9]*[13579]]], x2
; CHECK-DAG: mov [[NEW_LO:x[0-9]*[02468]]], x3
; CHECK-DAG: mov [[NEW_HI:x[0-9]*[13579]]], x4
; CHECK: caspal [[DESIRED_LO]], [[DESIRED_HI]], [[NEW_LO]], [[NEW_HI]], [x0]

  %res = cmpxchg ptr %addr, i128 %desired, i128 %new seq_cst seq_cst
  ret void
}