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# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass none -o - %s | FileCheck %s
--- |
define i32 @swp(i32* %addr) #0 {
entry:
%0 = atomicrmw xchg i32* %addr, i32 1 monotonic
ret i32 %0
}
attributes #0 = { "target-features"="+lse" }
...
---
name: swp
alignment: 4
tracksRegLiveness: true
registers:
- { id: 0, class: gpr64common }
- { id: 1, class: gpr32 }
- { id: 2, class: gpr32 }
liveins:
- { reg: '$x0', virtual-reg: '%0' }
body: |
bb.0.entry:
liveins: $x0
; CHECK-LABEL: swp
; CHECK: {{[0-9]+}}:gpr32 = SWPW killed %1, %0 :: (volatile load store monotonic 4 on %ir.addr)
%0:gpr64common = COPY $x0
%1:gpr32 = MOVi32imm 1
%2:gpr32 = SWPW killed %1, %0 :: (volatile load store monotonic 4 on %ir.addr)
$w0 = COPY %2
RET_ReallyLR implicit $w0
...
|
