1; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s 2; 3; Ensures that volatile stores/loads count as MemoryDefs 4 5; CHECK-LABEL: define i32 @foo 6define i32 @foo() { 7 %1 = alloca i32, align 4 8; CHECK: 1 = MemoryDef(liveOnEntry) 9; CHECK-NEXT: store volatile i32 4 10 store volatile i32 4, ptr %1, align 4 11; CHECK: 2 = MemoryDef(1) 12; CHECK-NEXT: store volatile i32 8 13 store volatile i32 8, ptr %1, align 4 14; CHECK: 3 = MemoryDef(2) 15; CHECK-NEXT: %2 = load volatile i32 16 %2 = load volatile i32, ptr %1, align 4 17; CHECK: 4 = MemoryDef(3) 18; CHECK-NEXT: %3 = load volatile i32 19 %3 = load volatile i32, ptr %1, align 4 20 %4 = add i32 %3, %2 21 ret i32 %4 22} 23 24; Ensuring we allow hoisting nonvolatile loads around volatile loads. 25; CHECK-LABEL: define void @volatile_only 26define void @volatile_only(ptr %arg1, ptr %arg2) { 27 ; Trivially NoAlias/MustAlias 28 %a = alloca i32 29 %b = alloca i32 30 31; CHECK: 1 = MemoryDef(liveOnEntry) 32; CHECK-NEXT: load volatile i32, ptr %a 33 load volatile i32, ptr %a 34; CHECK: MemoryUse(liveOnEntry) 35; CHECK-NEXT: load i32, ptr %b 36 load i32, ptr %b 37; CHECK: MemoryUse(liveOnEntry) 38; CHECK-NEXT: load i32, ptr %a 39 load i32, ptr %a 40 41 ; MayAlias 42; CHECK: 2 = MemoryDef(1) 43; CHECK-NEXT: load volatile i32, ptr %arg1 44 load volatile i32, ptr %arg1 45; CHECK: MemoryUse(liveOnEntry) 46; CHECK-NEXT: load i32, ptr %arg2 47 load i32, ptr %arg2 48 49 ret void 50} 51 52; Ensuring that volatile atomic operations work properly. 53; CHECK-LABEL: define void @volatile_atomics 54define void @volatile_atomics(ptr %arg1, ptr %arg2) { 55 %a = alloca i32 56 %b = alloca i32 57 58 ; Trivially NoAlias/MustAlias 59 60; CHECK: 1 = MemoryDef(liveOnEntry) 61; CHECK-NEXT: load atomic volatile i32, ptr %a acquire, align 4 62 load atomic volatile i32, ptr %a acquire, align 4 63; CHECK: MemoryUse(1) 64; CHECK-NEXT: load i32, ptr %b 65 load i32, ptr %b 66 67; CHECK: 2 = MemoryDef(1) 68; CHECK-NEXT: load atomic volatile i32, ptr %a monotonic, align 4 69 load atomic volatile i32, ptr %a monotonic, align 4 70; CHECK: MemoryUse(1) 71; CHECK-NEXT: load i32, ptr %b 72 load i32, ptr %b 73; CHECK: MemoryUse(1) 74; CHECK-NEXT: load atomic i32, ptr %b unordered, align 4 75 load atomic i32, ptr %b unordered, align 4 76; CHECK: MemoryUse(1) 77; CHECK-NEXT: load atomic i32, ptr %a unordered, align 4 78 load atomic i32, ptr %a unordered, align 4 79; CHECK: MemoryUse(1) 80; CHECK-NEXT: load i32, ptr %a 81 load i32, ptr %a 82 83 ; MayAlias 84; CHECK: 3 = MemoryDef(2) 85; CHECK-NEXT: load atomic volatile i32, ptr %arg1 monotonic, align 4 86 load atomic volatile i32, ptr %arg1 monotonic, align 4 87; CHECK: MemoryUse(1) 88; CHECK-NEXT: load i32, ptr %arg2 89 load i32, ptr %arg2 90 91 ret void 92} 93