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302 lines
8.1 KiB
LLVM
302 lines
8.1 KiB
LLVM
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; RUN: opt -basicaa -print-memoryssa -verify-memoryssa -analyze < %s 2>&1 | FileCheck %s
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;
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; Currently, MemorySSA doesn't support invariant groups. So, we should ignore
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; invariant.group.barrier intrinsics entirely. We'll need to pay attention to
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; them when/if we decide to support invariant groups.
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@g = external global i32
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define i32 @foo(i32* %a) {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* %a, align 4, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: store i32 1
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store i32 1, i32* @g, align 4
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%1 = bitcast i32* %a to i8*
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a32 = bitcast i8* %a8 to i32*
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; This have to be MemoryUse(2), because we can't skip the barrier based on
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; invariant.group.
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %2 = load i32
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%2 = load i32, i32* %a32, align 4, !invariant.group !0
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ret i32 %2
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}
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define i32 @skipBarrier(i32* %a) {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* %a, align 4, !invariant.group !0
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%1 = bitcast i32* %a to i8*
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: %a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a32 = bitcast i8* %a8 to i32*
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; We can skip the barrier only if the "skip" is not based on !invariant.group.
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: %2 = load i32
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%2 = load i32, i32* %a32, align 4, !invariant.group !0
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ret i32 %2
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}
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define i32 @skipBarrier2(i32* %a) {
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %v = load i32
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%v = load i32, i32* %a, align 4, !invariant.group !0
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%1 = bitcast i32* %a to i8*
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a32 = bitcast i8* %a8 to i32*
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; We can skip the barrier only if the "skip" is not based on !invariant.group.
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; CHECK: MemoryUse(liveOnEntry)
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; CHECK-NEXT: %v2 = load i32
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%v2 = load i32, i32* %a32, align 4, !invariant.group !0
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 1
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store i32 1, i32* @g, align 4
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; FIXME: based on invariant.group it should be MemoryUse(liveOnEntry)
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; CHECK: MemoryUse(1)
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; CHECK-NEXT: %v3 = load i32
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%v3 = load i32, i32* %a32, align 4, !invariant.group !0
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%add = add nsw i32 %v2, %v3
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%add2 = add nsw i32 %add, %v
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ret i32 %add2
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}
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define i32 @handleInvariantGroups(i32* %a) {
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 0
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store i32 0, i32* %a, align 4, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: store i32 1
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store i32 1, i32* @g, align 4
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%1 = bitcast i32* %a to i8*
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a8 = call i8* @llvm.invariant.group.barrier.p0i8(i8* %1)
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%a32 = bitcast i8* %a8 to i32*
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %2 = load i32
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%2 = load i32, i32* %a32, align 4, !invariant.group !0
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; CHECK: 3 = MemoryDef(2)
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; CHECK-NEXT: store i32 2
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store i32 2, i32* @g, align 4
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; FIXME: This can be changed to MemoryUse(2)
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; CHECK: MemoryUse(3)
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; CHECK-NEXT: %3 = load i32
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%3 = load i32, i32* %a32, align 4, !invariant.group !0
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%add = add nsw i32 %2, %3
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ret i32 %add
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}
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define i32 @loop(i1 %a) {
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entry:
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%0 = alloca i32, align 4
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i32 4
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store i32 4, i32* %0, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobber
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call void @clobber(i32* %0)
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br i1 %a, label %Loop.Body, label %Loop.End
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Loop.Body:
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; FIXME: MemoryUse(1)
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %1 = load i32
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%1 = load i32, i32* %0, !invariant.group !0
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br i1 %a, label %Loop.End, label %Loop.Body
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Loop.End:
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; FIXME: MemoryUse(1)
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %2 = load
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%2 = load i32, i32* %0, align 4, !invariant.group !0
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br i1 %a, label %Ret, label %Loop.Body
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Ret:
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ret i32 %2
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}
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define i8 @loop2(i8* %p) {
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entry:
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i8
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store i8 4, i8* %p, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobber
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call void @clobber8(i8* %p)
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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%after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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br i1 undef, label %Loop.Body, label %Loop.End
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Loop.Body:
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; 4 = MemoryPhi({entry,2},{Loop.Body,3},{Loop.End,5})
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; CHECK: MemoryUse(4)
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; CHECK-NEXT: %0 = load i8
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%0 = load i8, i8* %after, !invariant.group !0
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; FIXME: MemoryUse(1)
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; CHECK: MemoryUse(4)
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; CHECK-NEXT: %1 = load i8
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%1 = load i8, i8* %p, !invariant.group !0
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; CHECK: 3 = MemoryDef(4)
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store i8 4, i8* %after, !invariant.group !0
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br i1 undef, label %Loop.End, label %Loop.Body
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Loop.End:
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; 5 = MemoryPhi({entry,2},{Loop.Body,3})
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; CHECK: MemoryUse(5)
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; CHECK-NEXT: %2 = load
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%2 = load i8, i8* %after, align 4, !invariant.group !0
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; FIXME: MemoryUse(1)
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; CHECK: MemoryUse(5)
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; CHECK-NEXT: %3 = load
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%3 = load i8, i8* %p, align 4, !invariant.group !0
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br i1 undef, label %Ret, label %Loop.Body
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Ret:
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ret i8 %3
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}
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define i8 @loop3(i8* %p) {
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entry:
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i8
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store i8 4, i8* %p, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobber
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call void @clobber8(i8* %p)
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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%after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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br i1 undef, label %Loop.Body, label %Loop.End
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Loop.Body:
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; CHECK: 6 = MemoryPhi({entry,2},{Loop.Body,3},{Loop.next,4},{Loop.End,5})
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; CHECK: MemoryUse(6)
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; CHECK-NEXT: %0 = load i8
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%0 = load i8, i8* %after, !invariant.group !0
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; CHECK: 3 = MemoryDef(6)
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; CHECK-NEXT: call void @clobber8
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call void @clobber8(i8* %after)
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; FIXME: MemoryUse(6)
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; CHECK: MemoryUse(3)
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; CHECK-NEXT: %1 = load i8
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%1 = load i8, i8* %after, !invariant.group !0
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br i1 undef, label %Loop.next, label %Loop.Body
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Loop.next:
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; CHECK: 4 = MemoryDef(3)
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; CHECK-NEXT: call void @clobber8
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call void @clobber8(i8* %after)
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; FIXME: MemoryUse(6)
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; CHECK: MemoryUse(4)
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; CHECK-NEXT: %2 = load i8
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%2 = load i8, i8* %after, !invariant.group !0
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br i1 undef, label %Loop.End, label %Loop.Body
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Loop.End:
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; CHECK: 7 = MemoryPhi({entry,2},{Loop.next,4})
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; CHECK: MemoryUse(7)
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; CHECK-NEXT: %3 = load
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%3 = load i8, i8* %after, align 4, !invariant.group !0
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; CHECK: 5 = MemoryDef(7)
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; CHECK-NEXT: call void @clobber8
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call void @clobber8(i8* %after)
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; FIXME: MemoryUse(7)
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; CHECK: MemoryUse(5)
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; CHECK-NEXT: %4 = load
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%4 = load i8, i8* %after, align 4, !invariant.group !0
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br i1 undef, label %Ret, label %Loop.Body
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Ret:
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ret i8 %3
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}
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define i8 @loop4(i8* %p) {
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entry:
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; CHECK: 1 = MemoryDef(liveOnEntry)
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; CHECK-NEXT: store i8
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store i8 4, i8* %p, !invariant.group !0
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; CHECK: 2 = MemoryDef(1)
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; CHECK-NEXT: call void @clobber
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call void @clobber8(i8* %p)
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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%after = call i8* @llvm.invariant.group.barrier.p0i8(i8* %p)
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br i1 undef, label %Loop.Pre, label %Loop.End
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Loop.Pre:
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; CHECK: MemoryUse(2)
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; CHECK-NEXT: %0 = load i8
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%0 = load i8, i8* %after, !invariant.group !0
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br label %Loop.Body
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Loop.Body:
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; CHECK: 4 = MemoryPhi({Loop.Pre,2},{Loop.Body,3},{Loop.End,5})
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; CHECK-NEXT: MemoryUse(4)
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; CHECK-NEXT: %1 = load i8
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%1 = load i8, i8* %after, !invariant.group !0
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; FIXME: MemoryUse(2)
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; CHECK: MemoryUse(4)
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; CHECK-NEXT: %2 = load i8
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%2 = load i8, i8* %p, !invariant.group !0
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; CHECK: 3 = MemoryDef(4)
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store i8 4, i8* %after, !invariant.group !0
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br i1 undef, label %Loop.End, label %Loop.Body
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Loop.End:
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; CHECK: 5 = MemoryPhi({entry,2},{Loop.Body,3})
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; CHECK-NEXT: MemoryUse(5)
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; CHECK-NEXT: %3 = load
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%3 = load i8, i8* %after, align 4, !invariant.group !0
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; FIXME: MemoryUse(2)
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; CHECK: MemoryUse(5)
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; CHECK-NEXT: %4 = load
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%4 = load i8, i8* %p, align 4, !invariant.group !0
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br i1 undef, label %Ret, label %Loop.Body
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Ret:
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ret i8 %3
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}
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declare i8* @llvm.invariant.group.barrier.p0i8(i8*)
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declare void @clobber(i32*)
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declare void @clobber8(i8*)
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!0 = !{!"group1"}
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