atomic-cmpxchg.ll
3.82 KB
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=arm-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARM
; RUN: llc < %s -mtriple=thumb-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMB
; RUN: llc < %s -mtriple=armv6-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARMV6
; RUN: llc < %s -mtriple=thumbv6-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMBV6
; RUN: llc < %s -mtriple=armv7-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-ARMV7
; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -asm-verbose=false -verify-machineinstrs | FileCheck %s -check-prefix=CHECK-THUMBV7
define zeroext i1 @test_cmpxchg_res_i8(i8* %addr, i8 %desired, i8 zeroext %new) {
; CHECK-ARM-LABEL: test_cmpxchg_res_i8:
; CHECK-ARM: .save {r4, lr}
; CHECK-ARM-NEXT: push {r4, lr}
; CHECK-ARM-NEXT: mov r4, r1
; CHECK-ARM-NEXT: bl __sync_val_compare_and_swap_1
; CHECK-ARM-NEXT: and r1, r4, #255
; CHECK-ARM-NEXT: sub r0, r0, r1
; CHECK-ARM-NEXT: rsbs r1, r0, #0
; CHECK-ARM-NEXT: adc r0, r0, r1
; CHECK-ARM-NEXT: pop {r4, lr}
; CHECK-ARM-NEXT: mov pc, lr
;
; CHECK-THUMB-LABEL: test_cmpxchg_res_i8:
; CHECK-THUMB: .save {r4, lr}
; CHECK-THUMB-NEXT: push {r4, lr}
; CHECK-THUMB-NEXT: movs r4, r1
; CHECK-THUMB-NEXT: bl __sync_val_compare_and_swap_1
; CHECK-THUMB-NEXT: movs r1, #255
; CHECK-THUMB-NEXT: ands r1, r4
; CHECK-THUMB-NEXT: subs r1, r0, r1
; CHECK-THUMB-NEXT: rsbs r0, r1, #0
; CHECK-THUMB-NEXT: adcs r0, r1
; CHECK-THUMB-NEXT: pop {r4}
; CHECK-THUMB-NEXT: pop {r1}
; CHECK-THUMB-NEXT: bx r1
;
; CHECK-ARMV6-LABEL: test_cmpxchg_res_i8:
; CHECK-ARMV6: uxtb r1, r1
; CHECK-ARMV6-NEXT: .LBB0_1:
; CHECK-ARMV6-NEXT: ldrexb r3, [r0]
; CHECK-ARMV6-NEXT: cmp r3, r1
; CHECK-ARMV6-NEXT: movne r0, #0
; CHECK-ARMV6-NEXT: bxne lr
; CHECK-ARMV6-NEXT: .LBB0_2:
; CHECK-ARMV6-NEXT: strexb r3, r2, [r0]
; CHECK-ARMV6-NEXT: cmp r3, #0
; CHECK-ARMV6-NEXT: moveq r0, #1
; CHECK-ARMV6-NEXT: bxeq lr
; CHECK-ARMV6-NEXT: b .LBB0_1
;
; CHECK-THUMBV6-LABEL: test_cmpxchg_res_i8:
; CHECK-THUMBV6: .save {r4, lr}
; CHECK-THUMBV6-NEXT: push {r4, lr}
; CHECK-THUMBV6-NEXT: mov r4, r1
; CHECK-THUMBV6-NEXT: bl __sync_val_compare_and_swap_1
; CHECK-THUMBV6-NEXT: uxtb r1, r4
; CHECK-THUMBV6-NEXT: subs r1, r0, r1
; CHECK-THUMBV6-NEXT: rsbs r0, r1, #0
; CHECK-THUMBV6-NEXT: adcs r0, r1
; CHECK-THUMBV6-NEXT: pop {r4, pc}
;
; CHECK-ARMV7-LABEL: test_cmpxchg_res_i8:
; CHECK-ARMV7: uxtb r1, r1
; CHECK-ARMV7-NEXT: .LBB0_1:
; CHECK-ARMV7-NEXT: ldrexb r3, [r0]
; CHECK-ARMV7-NEXT: cmp r3, r1
; CHECK-ARMV7-NEXT: bne .LBB0_3
; CHECK-ARMV7-NEXT: strexb r3, r2, [r0]
; CHECK-ARMV7-NEXT: cmp r3, #0
; CHECK-ARMV7-NEXT: moveq r0, #1
; CHECK-ARMV7-NEXT: bxeq lr
; CHECK-ARMV7-NEXT: b .LBB0_1
; CHECK-ARMV7-NEXT: .LBB0_3:
; CHECK-ARMV7-NEXT: mov r0, #0
; CHECK-ARMV7-NEXT: clrex
; CHECK-ARMV7-NEXT: bx lr
;
; CHECK-THUMBV7-LABEL: test_cmpxchg_res_i8:
; CHECK-THUMBV7: uxtb r1, r1
; CHECK-THUMBV7-NEXT: .LBB0_1:
; CHECK-THUMBV7-NEXT: ldrexb r3, [r0]
; CHECK-THUMBV7-NEXT: cmp r3, r1
; CHECK-THUMBV7-NEXT: bne .LBB0_3
; CHECK-THUMBV7-NEXT: strexb r3, r2, [r0]
; CHECK-THUMBV7-NEXT: cmp r3, #0
; CHECK-THUMBV7-NEXT: itt eq
; CHECK-THUMBV7-NEXT: moveq r0, #1
; CHECK-THUMBV7-NEXT: bxeq lr
; CHECK-THUMBV7-NEXT: b .LBB0_1
; CHECK-THUMBV7-NEXT: .LBB0_3:
; CHECK-THUMBV7-NEXT: movs r0, #0
; CHECK-THUMBV7-NEXT: clrex
; CHECK-THUMBV7-NEXT: bx lr
entry:
%0 = cmpxchg i8* %addr, i8 %desired, i8 %new monotonic monotonic
%1 = extractvalue { i8, i1 } %0, 1
ret i1 %1
}