| Tim Northover | b4ddc08 | 2014-05-30 10:09:59 +0000 | [diff] [blame^] | 1 | ; RUN: llc -mtriple=thumbv7s-apple-ios7.0 -o - %s | FileCheck %s |
| 2 | |
| 3 | define i32 @test_return(i32* %p, i32 %oldval, i32 %newval) { |
| 4 | ; CHECK-LABEL: test_return: |
| 5 | |
| 6 | ; CHECK: dmb ishst |
| 7 | |
| 8 | ; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]: |
| 9 | ; CHECK: ldrex [[LOADED:r[0-9]+]], [r0] |
| 10 | ; CHECK: cmp [[LOADED]], r1 |
| 11 | ; CHECK: bne [[FAILED:LBB[0-9]+_[0-9]+]] |
| 12 | |
| 13 | ; CHECK: strex [[STATUS:r[0-9]+]], {{r[0-9]+}}, [r0] |
| 14 | ; CHECK: cmp [[STATUS]], #0 |
| 15 | ; CHECK: bne [[LOOP]] |
| 16 | |
| 17 | ; CHECK-NOT: cmp {{r[0-9]+}}, {{r[0-9]+}} |
| 18 | ; CHECK: movs r0, #1 |
| 19 | ; CHECK: dmb ish |
| 20 | ; CHECK: bx lr |
| 21 | |
| 22 | ; CHECK: [[FAILED]]: |
| 23 | ; CHECK-NOT: cmp {{r[0-9]+}}, {{r[0-9]+}} |
| 24 | ; CHECK: movs r0, #0 |
| 25 | ; CHECK: dmb ish |
| 26 | ; CHECK: bx lr |
| 27 | |
| 28 | %loaded = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst |
| 29 | %success = icmp eq i32 %loaded, %oldval |
| 30 | %conv = zext i1 %success to i32 |
| 31 | ret i32 %conv |
| 32 | } |
| 33 | |
| 34 | define i1 @test_return_bool(i8* %value, i8 %oldValue, i8 %newValue) { |
| 35 | ; CHECK-LABEL: test_return_bool: |
| 36 | |
| 37 | ; CHECK: uxtb [[OLDBYTE:r[0-9]+]], r1 |
| 38 | ; CHECK: dmb ishst |
| 39 | |
| 40 | ; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]: |
| 41 | ; CHECK: ldrexb [[LOADED:r[0-9]+]], [r0] |
| 42 | ; CHECK: cmp [[LOADED]], [[OLDBYTE]] |
| 43 | |
| 44 | ; CHECK: itt ne |
| 45 | ; CHECK: movne r0, #1 |
| 46 | ; CHECK: bxne lr |
| 47 | |
| 48 | ; CHECK: strexb [[STATUS:r[0-9]+]], {{r[0-9]+}}, [r0] |
| 49 | ; CHECK: cmp [[STATUS]], #0 |
| 50 | ; CHECK: bne [[LOOP]] |
| 51 | |
| 52 | ; CHECK-NOT: cmp {{r[0-9]+}}, {{r[0-9]+}} |
| 53 | ; CHECK: movs r0, #0 |
| 54 | ; CHECK: bx lr |
| 55 | |
| 56 | %loaded = cmpxchg i8* %value, i8 %oldValue, i8 %newValue acq_rel monotonic |
| 57 | %failure = icmp ne i8 %loaded, %oldValue |
| 58 | ret i1 %failure |
| 59 | } |
| 60 | |
| 61 | define void @test_conditional(i32* %p, i32 %oldval, i32 %newval) { |
| 62 | ; CHECK-LABEL: test_conditional: |
| 63 | |
| 64 | ; CHECK: dmb ishst |
| 65 | |
| 66 | ; CHECK: [[LOOP:LBB[0-9]+_[0-9]+]]: |
| 67 | ; CHECK: ldrex [[LOADED:r[0-9]+]], [r0] |
| 68 | ; CHECK: cmp [[LOADED]], r1 |
| 69 | ; CHECK: bne [[FAILED:LBB[0-9]+_[0-9]+]] |
| 70 | |
| 71 | ; CHECK: strex [[STATUS:r[0-9]+]], r2, [r0] |
| 72 | ; CHECK: cmp [[STATUS]], #0 |
| 73 | ; CHECK: bne [[LOOP]] |
| 74 | |
| 75 | ; CHECK-NOT: cmp {{r[0-9]+}}, {{r[0-9]+}} |
| 76 | ; CHECK: dmb ish |
| 77 | ; CHECK: b.w _bar |
| 78 | |
| 79 | ; CHECK: [[FAILED]]: |
| 80 | ; CHECK-NOT: cmp {{r[0-9]+}}, {{r[0-9]+}} |
| 81 | ; CHECK: dmb ish |
| 82 | ; CHECK: b.w _baz |
| 83 | |
| 84 | %loaded = cmpxchg i32* %p, i32 %oldval, i32 %newval seq_cst seq_cst |
| 85 | %success = icmp eq i32 %loaded, %oldval |
| 86 | br i1 %success, label %true, label %false |
| 87 | |
| 88 | true: |
| 89 | tail call void @bar() #2 |
| 90 | br label %end |
| 91 | |
| 92 | false: |
| 93 | tail call void @baz() #2 |
| 94 | br label %end |
| 95 | |
| 96 | end: |
| 97 | ret void |
| 98 | } |
| 99 | |
| 100 | declare void @bar() |
| 101 | declare void @baz() |