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