20 lines
761 B
LLVM
20 lines
761 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=x86_64-unknown-linux-gnu -show-mc-encoding < %s | FileCheck %s
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@a = external dso_local global { { i64 } }
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define i32 @atomic_global() nounwind {
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; CHECK-LABEL: atomic_global:
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; CHECK: # %bb.0: # %entry
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; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
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; CHECK-NEXT: lock btsq %rax, a(%rip) # encoding: [0xf0,0x48,0x0f,0xab,0x05,A,A,A,A]
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; CHECK-NEXT: # fixup A - offset: 5, value: a-4, kind: reloc_riprel_4byte
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; CHECK-NEXT: xorl %eax, %eax # encoding: [0x31,0xc0]
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; CHECK-NEXT: retq # encoding: [0xc3]
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entry:
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%shl.i = shl i64 1, 0
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%0 = atomicrmw or ptr @a, i64 %shl.i monotonic, align 8
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%and.i = and i64 %shl.i, %0
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ret i32 0
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}
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