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