llvm/test/CodeGen/X86/stack-protector-atomicrmw-xchg.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -S -mtriple=x86_64-unknown-linux-gnu -passes='require<libcall-lowering-info>,stack-protector' < %s | FileCheck %s
; RUN: opt -S -mtriple=x86_64-unknown-linux-gnu -passes='require<libcall-lowering-info>,function(require<domtree>,stack-protector)' < %s | FileCheck %s

define void @atomicrmw_xchg(ptr %p) sspstrong {
; CHECK-LABEL: define void @atomicrmw_xchg(
; CHECK-SAME: ptr [[P:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    [[STACKGUARDSLOT:%.*]] = alloca ptr, align 8
; CHECK-NEXT:    [[STACKGUARD:%.*]] = load volatile ptr, ptr addrspace(257) inttoptr (i32 40 to ptr addrspace(257)), align 8
; CHECK-NEXT:    call void @llvm.stackprotector(ptr [[STACKGUARD]], ptr [[STACKGUARDSLOT]])
; CHECK-NEXT:    [[A:%.*]] = alloca i64, align 8
; CHECK-NEXT:    [[TMP1:%.*]] = atomicrmw xchg ptr [[P]], ptr [[A]] acquire, align 8
; CHECK-NEXT:    [[STACKGUARD1:%.*]] = load volatile ptr, ptr addrspace(257) inttoptr (i32 40 to ptr addrspace(257)), align 8
; CHECK-NEXT:    [[TMP2:%.*]] = load volatile ptr, ptr [[STACKGUARDSLOT]], align 8
; CHECK-NEXT:    [[TMP3:%.*]] = icmp eq ptr [[STACKGUARD1]], [[TMP2]]
; CHECK-NEXT:    br i1 [[TMP3]], label %[[SP_RETURN:.*]], label %[[CALLSTACKCHECKFAILBLK:.*]], !prof [[PROF0:![0-9]+]]
; CHECK:       [[SP_RETURN]]:
; CHECK-NEXT:    ret void
; CHECK:       [[CALLSTACKCHECKFAILBLK]]:
; CHECK-NEXT:    call void @__stack_chk_fail()
; CHECK-NEXT:    unreachable
;
  %a = alloca i64
  atomicrmw xchg ptr %p, ptr %a acquire
  ret void
}
;.
; CHECK: [[PROF0]] = !{!"branch_weights", i32 2147481600, i32 2048}
;.