| Tim Northover | b629c77 | 2016-04-18 21:48:55 +0000 | [diff] [blame^] | 1 | ; RUN: llc -verify-machineinstrs -mtriple=armv7-linux-gnu -O0 %s -o - | FileCheck %s |
| 2 | ; RUN: llc -verify-machineinstrs -mtriple=thumbv8-linux-gnu -O0 %s -o - | FileCheck %s |
| 3 | ; RUN: llc -verify-machineinstrs -mtriple=thumbv6m-none-eabi -O0 %s -o - | FileCheck %s --check-prefix=CHECK-T1 |
| 4 | |
| 5 | ; CHECK-T1-NOT: ldrex |
| 6 | ; CHECK-T1-NOT: strex |
| 7 | |
| 8 | define { i8, i1 } @test_cmpxchg_8(i8* %addr, i8 %desired, i8 %new) nounwind { |
| 9 | ; CHECK-LABEL: test_cmpxchg_8: |
| 10 | ; CHECK: dmb ish |
| 11 | ; CHECK: uxtb [[DESIRED:r[0-9]+]], [[DESIRED]] |
| 12 | ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]: |
| 13 | ; CHECK: ldrexb [[OLD:r[0-9]+]], [r0] |
| 14 | ; CHECK: cmp [[OLD]], [[DESIRED]] |
| 15 | ; CHECK: bne [[DONE:.LBB[0-9]+_[0-9]+]] |
| 16 | ; CHECK: strexb [[STATUS:r[0-9]+]], r2, [r0] |
| 17 | ; CHECK: cmp{{(\.w)?}} [[STATUS]], #0 |
| 18 | ; CHECK: bne [[RETRY]] |
| 19 | ; CHECK: [[DONE]]: |
| 20 | ; CHECK: cmp{{(\.w)?}} [[OLD]], [[DESIRED]] |
| 21 | ; CHECK: {{moveq.w|movweq}} {{r[0-9]+}}, #1 |
| 22 | ; CHECK: dmb ish |
| 23 | %res = cmpxchg i8* %addr, i8 %desired, i8 %new seq_cst monotonic |
| 24 | ret { i8, i1 } %res |
| 25 | } |
| 26 | |
| 27 | define { i16, i1 } @test_cmpxchg_16(i16* %addr, i16 %desired, i16 %new) nounwind { |
| 28 | ; CHECK-LABEL: test_cmpxchg_16: |
| 29 | ; CHECK: dmb ish |
| 30 | ; CHECK: uxth [[DESIRED:r[0-9]+]], [[DESIRED]] |
| 31 | ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]: |
| 32 | ; CHECK: ldrexh [[OLD:r[0-9]+]], [r0] |
| 33 | ; CHECK: cmp [[OLD]], [[DESIRED]] |
| 34 | ; CHECK: bne [[DONE:.LBB[0-9]+_[0-9]+]] |
| 35 | ; CHECK: strexh [[STATUS:r[0-9]+]], r2, [r0] |
| 36 | ; CHECK: cmp{{(\.w)?}} [[STATUS]], #0 |
| 37 | ; CHECK: bne [[RETRY]] |
| 38 | ; CHECK: [[DONE]]: |
| 39 | ; CHECK: cmp{{(\.w)?}} [[OLD]], [[DESIRED]] |
| 40 | ; CHECK: {{moveq.w|movweq}} {{r[0-9]+}}, #1 |
| 41 | ; CHECK: dmb ish |
| 42 | %res = cmpxchg i16* %addr, i16 %desired, i16 %new seq_cst monotonic |
| 43 | ret { i16, i1 } %res |
| 44 | } |
| 45 | |
| 46 | define { i32, i1 } @test_cmpxchg_32(i32* %addr, i32 %desired, i32 %new) nounwind { |
| 47 | ; CHECK-LABEL: test_cmpxchg_32: |
| 48 | ; CHECK: dmb ish |
| 49 | ; CHECK-NOT: uxt |
| 50 | ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]: |
| 51 | ; CHECK: ldrex [[OLD:r[0-9]+]], [r0] |
| 52 | ; CHECK: cmp [[OLD]], [[DESIRED]] |
| 53 | ; CHECK: bne [[DONE:.LBB[0-9]+_[0-9]+]] |
| 54 | ; CHECK: strex [[STATUS:r[0-9]+]], r2, [r0] |
| 55 | ; CHECK: cmp{{(\.w)?}} [[STATUS]], #0 |
| 56 | ; CHECK: bne [[RETRY]] |
| 57 | ; CHECK: [[DONE]]: |
| 58 | ; CHECK: cmp{{(\.w)?}} [[OLD]], [[DESIRED]] |
| 59 | ; CHECK: {{moveq.w|movweq}} {{r[0-9]+}}, #1 |
| 60 | ; CHECK: dmb ish |
| 61 | %res = cmpxchg i32* %addr, i32 %desired, i32 %new seq_cst monotonic |
| 62 | ret { i32, i1 } %res |
| 63 | } |
| 64 | |
| 65 | define { i64, i1 } @test_cmpxchg_64(i64* %addr, i64 %desired, i64 %new) nounwind { |
| 66 | ; CHECK-LABEL: test_cmpxchg_64: |
| 67 | ; CHECK: dmb ish |
| 68 | ; CHECK-NOT: uxt |
| 69 | ; CHECK: [[RETRY:.LBB[0-9]+_[0-9]+]]: |
| 70 | ; CHECK: ldrexd [[OLDLO:r[0-9]+]], [[OLDHI:r[0-9]+]], [r0] |
| 71 | ; CHECK: cmp [[OLDLO]], r6 |
| 72 | ; CHECK: sbcs{{(\.w)?}} [[STATUS:r[0-9]+]], [[OLDHI]], r7 |
| 73 | ; CHECK: bne [[DONE:.LBB[0-9]+_[0-9]+]] |
| 74 | ; CHECK: strexd [[STATUS]], r4, r5, [r0] |
| 75 | ; CHECK: cmp{{(\.w)?}} [[STATUS]], #0 |
| 76 | ; CHECK: bne [[RETRY]] |
| 77 | ; CHECK: [[DONE]]: |
| 78 | ; CHECK: dmb ish |
| 79 | %res = cmpxchg i64* %addr, i64 %desired, i64 %new seq_cst monotonic |
| 80 | ret { i64, i1 } %res |
| 81 | } |