; RUN: llc < %s -mtriple=armv7-apple-ios -verify-machineinstrs | FileCheck %s --check-prefix=CHECK --check-prefix CHECK-ARMV7
; RUN: llc < %s -mtriple=thumbv7-apple-ios -verify-machineinstrs | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-T2
; RUN: llc < %s -mtriple=thumbv6-apple-ios -verify-machineinstrs | FileCheck %s --check-prefix=CHECK-T1
; RUN: llc < %s -mtriple=thumbv6-apple-ios -verify-machineinstrs -mcpu=cortex-m0 | FileCheck %s --check-prefix=CHECK-M0
; RUN: llc < %s -mtriple=thumbv7--none-eabi -thread-model single -verify-machineinstrs | FileCheck %s --check-prefix=CHECK-BAREMETAL

target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"

define void @func(i32 %argc, i8** %argv) nounwind {
entry:
	%argc.addr = alloca i32		; <i32*> [#uses=1]
	%argv.addr = alloca i8**		; <i8***> [#uses=1]
	%val1 = alloca i32		; <i32*> [#uses=2]
	%val2 = alloca i32		; <i32*> [#uses=15]
	%andt = alloca i32		; <i32*> [#uses=2]
	%ort = alloca i32		; <i32*> [#uses=2]
	%xort = alloca i32		; <i32*> [#uses=2]
	%old = alloca i32		; <i32*> [#uses=18]
	%temp = alloca i32		; <i32*> [#uses=2]
	store i32 %argc, i32* %argc.addr
	store i8** %argv, i8*** %argv.addr
	store i32 0, i32* %val1
	store i32 31, i32* %val2
	store i32 3855, i32* %andt
	store i32 3855, i32* %ort
	store i32 3855, i32* %xort
	store i32 4, i32* %temp
	%tmp = load i32, i32* %temp
  ; CHECK: ldrex
  ; CHECK: add
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_add_4
  ; CHECK-M0: bl ___sync_fetch_and_add_4
  ; CHECK-BAREMETAL: add
  ; CHECK-BAREMETAL-NOT: __sync
  %0 = atomicrmw add i32* %val1, i32 %tmp monotonic
	store i32 %0, i32* %old
  ; CHECK: ldrex
  ; CHECK: sub
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_sub_4
  ; CHECK-M0: bl ___sync_fetch_and_sub_4
  ; CHECK-BAREMETAL: sub
  ; CHECK-BAREMETAL-NOT: __sync
  %1 = atomicrmw sub i32* %val2, i32 30 monotonic
	store i32 %1, i32* %old
  ; CHECK: ldrex
  ; CHECK: add
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_add_4
  ; CHECK-M0: bl ___sync_fetch_and_add_4
  ; CHECK-BAREMETAL: add
  ; CHECK-BAREMETAL-NOT: __sync
  %2 = atomicrmw add i32* %val2, i32 1 monotonic
	store i32 %2, i32* %old
  ; CHECK: ldrex
  ; CHECK: sub
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_sub_4
  ; CHECK-M0: bl ___sync_fetch_and_sub_4
  ; CHECK-BAREMETAL: sub
  ; CHECK-BAREMETAL-NOT: __sync
  %3 = atomicrmw sub i32* %val2, i32 1 monotonic
	store i32 %3, i32* %old
  ; CHECK: ldrex
  ; CHECK: and
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_and_4
  ; CHECK-M0: bl ___sync_fetch_and_and_4
  ; CHECK-BAREMETAL: and
  ; CHECK-BAREMETAL-NOT: __sync
  %4 = atomicrmw and i32* %andt, i32 4080 monotonic
	store i32 %4, i32* %old
  ; CHECK: ldrex
  ; CHECK: or
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_or_4
  ; CHECK-M0: bl ___sync_fetch_and_or_4
  ; CHECK-BAREMETAL: or
  ; CHECK-BAREMETAL-NOT: __sync
  %5 = atomicrmw or i32* %ort, i32 4080 monotonic
	store i32 %5, i32* %old
  ; CHECK: ldrex
  ; CHECK: eor
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_xor_4
  ; CHECK-M0: bl ___sync_fetch_and_xor_4
  ; CHECK-BAREMETAL: eor
  ; CHECK-BAREMETAL-NOT: __sync
  %6 = atomicrmw xor i32* %xort, i32 4080 monotonic
	store i32 %6, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_min_4
  ; CHECK-M0: bl ___sync_fetch_and_min_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %7 = atomicrmw min i32* %val2, i32 16 monotonic
	store i32 %7, i32* %old
	%neg = sub i32 0, 1
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_min_4
  ; CHECK-M0: bl ___sync_fetch_and_min_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %8 = atomicrmw min i32* %val2, i32 %neg monotonic
	store i32 %8, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_max_4
  ; CHECK-M0: bl ___sync_fetch_and_max_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %9 = atomicrmw max i32* %val2, i32 1 monotonic
	store i32 %9, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_max_4
  ; CHECK-M0: bl ___sync_fetch_and_max_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %10 = atomicrmw max i32* %val2, i32 0 monotonic
	store i32 %10, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_4
  ; CHECK-M0: bl ___sync_fetch_and_umin_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %11 = atomicrmw umin i32* %val2, i32 16 monotonic
	store i32 %11, i32* %old
	%uneg = sub i32 0, 1
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_4
  ; CHECK-M0: bl ___sync_fetch_and_umin_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %12 = atomicrmw umin i32* %val2, i32 %uneg monotonic
	store i32 %12, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_4
  ; CHECK-M0: bl ___sync_fetch_and_umax_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %13 = atomicrmw umax i32* %val2, i32 1 monotonic
	store i32 %13, i32* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_4
  ; CHECK-M0: bl ___sync_fetch_and_umax_4
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %14 = atomicrmw umax i32* %val2, i32 0 monotonic
	store i32 %14, i32* %old

  ret void
}

define void @func2() nounwind {
entry:
  %val = alloca i16
  %old = alloca i16
  store i16 31, i16* %val
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_2
  ; CHECK-M0: bl ___sync_fetch_and_umin_2
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %0 = atomicrmw umin i16* %val, i16 16 monotonic
  store i16 %0, i16* %old
  %uneg = sub i16 0, 1
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_2
  ; CHECK-M0: bl ___sync_fetch_and_umin_2
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %1 = atomicrmw umin i16* %val, i16 %uneg monotonic
  store i16 %1, i16* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_2
  ; CHECK-M0: bl ___sync_fetch_and_umax_2
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %2 = atomicrmw umax i16* %val, i16 1 monotonic
  store i16 %2, i16* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_2
  ; CHECK-M0: bl ___sync_fetch_and_umax_2
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %3 = atomicrmw umax i16* %val, i16 0 monotonic
  store i16 %3, i16* %old
  ret void
}

define void @func3() nounwind {
entry:
  %val = alloca i8
  %old = alloca i8
  store i8 31, i8* %val
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_1
  ; CHECK-M0: bl ___sync_fetch_and_umin_1
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %0 = atomicrmw umin i8* %val, i8 16 monotonic
  store i8 %0, i8* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umin_1
  ; CHECK-M0: bl ___sync_fetch_and_umin_1
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %uneg = sub i8 0, 1
  %1 = atomicrmw umin i8* %val, i8 %uneg monotonic
  store i8 %1, i8* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_1
  ; CHECK-M0: bl ___sync_fetch_and_umax_1
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %2 = atomicrmw umax i8* %val, i8 1 monotonic
  store i8 %2, i8* %old
  ; CHECK: ldrex
  ; CHECK: cmp
  ; CHECK: strex
  ; CHECK-T1: blx ___sync_fetch_and_umax_1
  ; CHECK-M0: bl ___sync_fetch_and_umax_1
  ; CHECK-BAREMETAL: cmp
  ; CHECK-BAREMETAL-NOT: __sync
  %3 = atomicrmw umax i8* %val, i8 0 monotonic
  store i8 %3, i8* %old
  ret void
}

; CHECK: func4
; This function should not need to use callee-saved registers.
; rdar://problem/12203728
; CHECK-NOT: r4
define i32 @func4(i32* %p) nounwind optsize ssp {
entry:
  %0 = atomicrmw add i32* %p, i32 1 monotonic
  ret i32 %0
}

define i32 @test_cmpxchg_fail_order(i32 *%addr, i32 %desired, i32 %new) {
; CHECK-LABEL: test_cmpxchg_fail_order:

  %pair = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst monotonic
  %oldval = extractvalue { i32, i1 } %pair, 0
; CHECK-ARMV7:     dmb ish
; CHECK-ARMV7: [[LOOP_BB:\.?LBB[0-9]+_1]]:
; CHECK-ARMV7:     ldrex   [[OLDVAL:r[0-9]+]], [r[[ADDR:[0-9]+]]]
; CHECK-ARMV7:     cmp     [[OLDVAL]], r1
; CHECK-ARMV7:     bne     [[FAIL_BB:\.?LBB[0-9]+_[0-9]+]]
; CHECK-ARMV7:     strex   [[SUCCESS:r[0-9]+]], r2, [r[[ADDR]]]
; CHECK-ARMV7:     cmp     [[SUCCESS]], #0
; CHECK-ARMV7:     bne     [[LOOP_BB]]
; CHECK-ARMV7:     dmb     ish
; CHECK-ARMV7:     bx      lr
; CHECK-ARMV7: [[FAIL_BB]]:
; CHECK-ARMV7:     clrex
; CHECK-ARMV7:     bx      lr

; CHECK-T2:     dmb ish
; CHECK-T2: [[LOOP_BB:\.?LBB[0-9]+_1]]:
; CHECK-T2:     ldrex   [[OLDVAL:r[0-9]+]], [r[[ADDR:[0-9]+]]]
; CHECK-T2:     cmp     [[OLDVAL]], r1
; CHECK-T2:     clrexne
; CHECK-T2:     bxne    lr
; CHECK-T2:     strex   [[SUCCESS:r[0-9]+]], r2, [r[[ADDR]]]
; CHECK-T2:     cmp     [[SUCCESS]], #0
; CHECK-T2:     dmbeq   ish
; CHECK-T2:     bxeq    lr
; CHECK-T2:     b       [[LOOP_BB]]

  ret i32 %oldval
}

define i32 @test_cmpxchg_fail_order1(i32 *%addr, i32 %desired, i32 %new) {
; CHECK-LABEL: test_cmpxchg_fail_order1:

  %pair = cmpxchg i32* %addr, i32 %desired, i32 %new acquire acquire
  %oldval = extractvalue { i32, i1 } %pair, 0
; CHECK-NOT:     dmb ish
; CHECK: [[LOOP_BB:\.?LBB[0-9]+_1]]:
; CHECK:     ldrex   [[OLDVAL:r[0-9]+]], [r[[ADDR:[0-9]+]]]
; CHECK:     cmp     [[OLDVAL]], r1
; CHECK:     bne     [[FAIL_BB:\.?LBB[0-9]+_[0-9]+]]
; CHECK:     strex   [[SUCCESS:r[0-9]+]], r2, [r[[ADDR]]]
; CHECK:     cmp     [[SUCCESS]], #0
; CHECK:     bne     [[LOOP_BB]]
; CHECK:     b       [[END_BB:\.?LBB[0-9]+_[0-9]+]]
; CHECK: [[FAIL_BB]]:
; CHECK-NEXT: clrex
; CHECK-NEXT: [[END_BB]]:
; CHECK:     dmb     ish
; CHECK:     bx      lr

  ret i32 %oldval
}

define i32 @load_load_add_acquire(i32* %mem1, i32* %mem2) nounwind {
; CHECK-LABEL: load_load_add_acquire
  %val1 = load atomic i32, i32* %mem1 acquire, align 4
  %val2 = load atomic i32, i32* %mem2 acquire, align 4
  %tmp = add i32 %val1, %val2

; CHECK: ldr {{r[0-9]}}, [r0]
; CHECK: dmb
; CHECK: ldr {{r[0-9]}}, [r1]
; CHECK: dmb
; CHECK: add r0,

; CHECK-M0: ___sync_val_compare_and_swap_4
; CHECK-M0: ___sync_val_compare_and_swap_4

; CHECK-BAREMETAL: ldr {{r[0-9]}}, [r0]
; CHECK-BAREMETAL-NOT: dmb
; CHECK-BAREMETAL: ldr {{r[0-9]}}, [r1]
; CHECK-BAREMETAL-NOT: dmb
; CHECK-BAREMETAL: add r0,

  ret i32 %tmp
}

define void @store_store_release(i32* %mem1, i32 %val1, i32* %mem2, i32 %val2) {
; CHECK-LABEL: store_store_release
  store atomic i32 %val1, i32* %mem1 release, align 4
  store atomic i32 %val2, i32* %mem2 release, align 4

; CHECK: dmb
; CHECK: str r1, [r0]
; CHECK: dmb
; CHECK: str r3, [r2]

; CHECK-M0: ___sync_lock_test_and_set
; CHECK-M0: ___sync_lock_test_and_set

; CHECK-BAREMETAL-NOT: dmb
; CHECK-BAREMTEAL: str r1, [r0]
; CHECK-BAREMETAL-NOT: dmb
; CHECK-BAREMTEAL: str r3, [r2]

  ret void
}

define void @load_fence_store_monotonic(i32* %mem1, i32* %mem2) {
; CHECK-LABEL: load_fence_store_monotonic
  %val = load atomic i32, i32* %mem1 monotonic, align 4
  fence seq_cst
  store atomic i32 %val, i32* %mem2 monotonic, align 4

; CHECK: ldr [[R0:r[0-9]]], [r0]
; CHECK: dmb
; CHECK: str [[R0]], [r1]

; CHECK-M0: ldr [[R0:r[0-9]]], [r0]
; CHECK-M0: dmb
; CHECK-M0: str [[R0]], [r1]

; CHECK-BAREMETAL: ldr [[R0:r[0-9]]], [r0]
; CHECK-BAREMETAL-NOT: dmb
; CHECK-BAREMETAL: str [[R0]], [r1]

  ret void
}