| Nicolai Haehnle | 889a20c | 2016-07-11 14:11:51 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -sink -S | FileCheck %s |
| 2 | |
| 3 | declare i32 @f_load_global() nounwind readonly |
| 4 | declare i32 @f_load_arg(i32*) nounwind readonly argmemonly |
| 5 | declare void @f_store_global(i32) nounwind |
| 6 | declare void @f_store_arg(i32*) nounwind argmemonly |
| 7 | declare void @f_readonly_arg(i32* readonly, i32*) nounwind argmemonly |
| 8 | declare i32 @f_readnone(i32) nounwind readnone |
| 9 | |
| 10 | @A = external global i32 |
| 11 | @B = external global i32 |
| 12 | |
| 13 | ; Sink readonly call if no stores are in the way. |
| 14 | ; |
| 15 | ; CHECK-LABEL: @test_sink_no_stores( |
| 16 | ; CHECK: true: |
| 17 | ; CHECK-NEXT: %l = call i32 @f_load_global |
| 18 | ; CHECK-NEXT: ret i32 %l |
| 19 | define i32 @test_sink_no_stores(i1 %z) { |
| 20 | %l = call i32 @f_load_global() |
| 21 | br i1 %z, label %true, label %false |
| 22 | true: |
| 23 | ret i32 %l |
| 24 | false: |
| 25 | ret i32 0 |
| 26 | } |
| 27 | |
| 28 | ; CHECK-LABEL: @test_sink_argmem_store( |
| 29 | ; CHECK: true: |
| 30 | ; CHECK-NEXT: %l = call i32 @f_load_arg |
| 31 | ; CHECK-NEXT: ret i32 %l |
| 32 | define i32 @test_sink_argmem_store(i1 %z) { |
| 33 | %l = call i32 @f_load_arg(i32* @A) |
| 34 | store i32 0, i32* @B |
| 35 | br i1 %z, label %true, label %false |
| 36 | true: |
| 37 | ret i32 %l |
| 38 | false: |
| 39 | ret i32 0 |
| 40 | } |
| 41 | |
| 42 | ; CHECK-LABEL: @test_sink_argmem_call( |
| 43 | ; CHECK: true: |
| 44 | ; CHECK-NEXT: %l = call i32 @f_load_arg |
| 45 | ; CHECK-NEXT: ret i32 %l |
| 46 | define i32 @test_sink_argmem_call(i1 %z) { |
| 47 | %l = call i32 @f_load_arg(i32* @A) |
| 48 | call void @f_store_arg(i32* @B) |
| 49 | br i1 %z, label %true, label %false |
| 50 | true: |
| 51 | ret i32 %l |
| 52 | false: |
| 53 | ret i32 0 |
| 54 | } |
| 55 | |
| 56 | ; CHECK-LABEL: @test_sink_argmem_multiple( |
| 57 | ; CHECK: true: |
| 58 | ; CHECK-NEXT: %l = call i32 @f_load_arg |
| 59 | ; CHECK-NEXT: ret i32 %l |
| 60 | define i32 @test_sink_argmem_multiple(i1 %z) { |
| 61 | %l = call i32 @f_load_arg(i32* @A) |
| 62 | call void @f_readonly_arg(i32* @A, i32* @B) |
| 63 | br i1 %z, label %true, label %false |
| 64 | true: |
| 65 | ret i32 %l |
| 66 | false: |
| 67 | ret i32 0 |
| 68 | } |
| 69 | |
| 70 | ; But don't sink if there is a store. |
| 71 | ; |
| 72 | ; CHECK-LABEL: @test_nosink_store( |
| 73 | ; CHECK: call i32 @f_load_global |
| 74 | ; CHECK-NEXT: store i32 |
| 75 | define i32 @test_nosink_store(i1 %z) { |
| 76 | %l = call i32 @f_load_global() |
| 77 | store i32 0, i32* @A |
| 78 | br i1 %z, label %true, label %false |
| 79 | true: |
| 80 | ret i32 %l |
| 81 | false: |
| 82 | ret i32 0 |
| 83 | } |
| 84 | |
| 85 | ; CHECK-LABEL: @test_nosink_call( |
| 86 | ; CHECK: call i32 @f_load_global |
| 87 | ; CHECK-NEXT: call void @f_store_global |
| 88 | define i32 @test_nosink_call(i1 %z) { |
| 89 | %l = call i32 @f_load_global() |
| 90 | call void @f_store_global(i32 0) |
| 91 | br i1 %z, label %true, label %false |
| 92 | true: |
| 93 | ret i32 %l |
| 94 | false: |
| 95 | ret i32 0 |
| 96 | } |
| 97 | |
| 98 | ; readnone calls are sunk across stores. |
| 99 | ; |
| 100 | ; CHECK-LABEL: @test_sink_readnone( |
| 101 | ; CHECK: true: |
| 102 | ; CHECK-NEXT: %l = call i32 @f_readnone( |
| 103 | ; CHECK-NEXT: ret i32 %l |
| 104 | define i32 @test_sink_readnone(i1 %z) { |
| 105 | %l = call i32 @f_readnone(i32 0) |
| 106 | store i32 0, i32* @A |
| 107 | br i1 %z, label %true, label %false |
| 108 | true: |
| 109 | ret i32 %l |
| 110 | false: |
| 111 | ret i32 0 |
| 112 | } |