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