derek.holloway
7502bf64a4
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93 lines
2.6 KiB
LLVM
93 lines
2.6 KiB
LLVM
; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s
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;
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; Ensures that volatile stores/loads count as MemoryDefs
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; CHECK-LABEL: define i32 @foo
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define i32 @foo() {
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%1 = alloca i32, align 4
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store volatile i32 4
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store volatile i32 4, ptr %1, align 4
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: store volatile i32 8
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store volatile i32 8, ptr %1, align 4
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; CHECK: 3 = MemoryDef(2)
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; CHECK-NEXT: %2 = load volatile i32
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%2 = load volatile i32, ptr %1, align 4
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; CHECK: 4 = MemoryDef(3)
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; CHECK-NEXT: %3 = load volatile i32
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%3 = load volatile i32, ptr %1, align 4
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%4 = add i32 %3, %2
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ret i32 %4
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}
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; Ensuring we allow hoisting nonvolatile loads around volatile loads.
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; CHECK-LABEL: define void @volatile_only
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define void @volatile_only(ptr %arg1, ptr %arg2) {
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; Trivially NoAlias/MustAlias
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%a = alloca i32
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%b = alloca i32
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: load volatile i32, ptr %a
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load volatile i32, ptr %a
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: load i32, ptr %b
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load i32, ptr %b
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: load i32, ptr %a
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load i32, ptr %a
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; MayAlias
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: load volatile i32, ptr %arg1
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load volatile i32, ptr %arg1
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: load i32, ptr %arg2
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load i32, ptr %arg2
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ret void
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}
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; Ensuring that volatile atomic operations work properly.
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; CHECK-LABEL: define void @volatile_atomics
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define void @volatile_atomics(ptr %arg1, ptr %arg2) {
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%a = alloca i32
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%b = alloca i32
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; Trivially NoAlias/MustAlias
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: load atomic volatile i32, ptr %a acquire, align 4
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load atomic volatile i32, ptr %a acquire, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load i32, ptr %b
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load i32, ptr %b
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: load atomic volatile i32, ptr %a monotonic, align 4
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load atomic volatile i32, ptr %a monotonic, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load i32, ptr %b
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load i32, ptr %b
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load atomic i32, ptr %b unordered, align 4
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load atomic i32, ptr %b unordered, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load atomic i32, ptr %a unordered, align 4
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load atomic i32, ptr %a unordered, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load i32, ptr %a
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load i32, ptr %a
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; MayAlias
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; CHECK: 3 = MemoryDef(2)
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; CHECK-NEXT: load atomic volatile i32, ptr %arg1 monotonic, align 4
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load atomic volatile i32, ptr %arg1 monotonic, align 4
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: load i32, ptr %arg2
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load i32, ptr %arg2
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ret void
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}
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