llvm-6502/test/CodeGen/X86/2008-08-19-SubAndFetch.ll

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; RUN: llc < %s -march=x86-64 | FileCheck %s
@var = external global i64 ; <i64*> [#uses=1]
define i32 @main() nounwind {
entry:
; CHECK: main:
; CHECK: lock
; CHECK: decq
tail call i64 @llvm.atomic.load.sub.i64.p0i64( i64* @var, i64 1 ) ; <i64>:0 [#uses=0]
unreachable
}
declare i64 @llvm.atomic.load.sub.i64.p0i64(i64*, i64) nounwind