; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
; CHECK-LABEL: Function: simple: 5 pointers, 0 call sites
; CHECK: NoAlias: float* %src1, float* %src2
; CHECK: NoAlias: float* %phi, float* %src1
; CHECK: MayAlias: float* %phi, float* %src2
; CHECK: NoAlias: float* %next, float* %src1
; CHECK: MayAlias: float* %next, float* %src2
; CHECK: NoAlias: float* %next, float* %phi
; CHECK: NoAlias: float* %g, float* %src1
; CHECK: NoAlias: float* %g, float* %src2
; CHECK: NoAlias: float* %g, float* %phi
; CHECK: NoAlias: float* %g, float* %next
define void @simple(ptr %src1, ptr noalias %src2, i32 %n) nounwind {
entry:
load float, ptr %src1
load float, ptr %src2
br label %loop
loop:
%phi = phi ptr [ %src2, %entry ], [ %next, %loop ]
%idx = phi i32 [ 0, %entry ], [ %idxn, %loop ]
%next = getelementptr inbounds float, ptr %phi, i32 1
%g = getelementptr inbounds float, ptr %src1, i32 3
%l = load float, ptr %phi
load float, ptr %next
%a = fadd float %l, 1.0
store float %a, ptr %g
%idxn = add nsw nuw i32 %idx, 1
%cmp5 = icmp eq i32 %idxn, %n
br i1 %cmp5, label %end, label %loop
end:
ret void
}
; CHECK-LABEL: Function: notmust: 6 pointers, 0 call sites
; CHECK: MustAlias: i8* %tab, [2 x i32]* %tab
; CHECK: PartialAlias (off -4): i32* %arrayidx, [2 x i32]* %tab
; CHECK: NoAlias: i32* %arrayidx, i8* %tab
; CHECK: MustAlias: i32* %tab, [2 x i32]* %tab
; CHECK: MustAlias: i32* %tab, i8* %tab
; CHECK: NoAlias: i32* %arrayidx, i32* %tab
; CHECK: MayAlias: i32* %incdec.ptr.i, [2 x i32]* %tab
; CHECK: NoAlias: i32* %incdec.ptr.i, i8* %tab
; CHECK: MayAlias: i32* %arrayidx, i32* %incdec.ptr.i
; CHECK: NoAlias: i32* %incdec.ptr.i, i32* %tab
; CHECK: MayAlias: i32* %p.addr.05.i, [2 x i32]* %tab
; CHECK: MayAlias: i32* %p.addr.05.i, i8* %tab
; CHECK: MayAlias: i32* %arrayidx, i32* %p.addr.05.i
; CHECK: MayAlias: i32* %p.addr.05.i, i32* %tab
; CHECK: NoAlias: i32* %incdec.ptr.i, i32* %p.addr.05.i
define i32 @notmust() nounwind {
entry:
%tab = alloca [2 x i32], align 4
%ignore1 = load [2 x i32], ptr %tab
%ignore2 = load i8, ptr %tab
%arrayidx = getelementptr inbounds [2 x i32], ptr %tab, i32 0, i32 1
store i32 0, ptr %arrayidx, align 4
store i32 0, ptr %tab, align 4
%0 = add i32 1, 1
%cmp4.i = icmp slt i32 %0, 2
br i1 %cmp4.i, label %while.body.i, label %f.exit
while.body.i: ; preds = %while.body.i, %entry
%1 = phi i32 [ 1, %while.body.i ], [ %0, %entry ]
%foo.06.i = phi i32 [ %sub.i, %while.body.i ], [ 2, %entry ]
%p.addr.05.i = phi ptr [ %incdec.ptr.i, %while.body.i ], [ %tab, %entry ]
%sub.i = sub nsw i32 %foo.06.i, %1
%incdec.ptr.i = getelementptr inbounds i32, ptr %p.addr.05.i, i32 1
%ignore3 = load i32, ptr %incdec.ptr.i
store i32 %sub.i, ptr %p.addr.05.i, align 4
%cmp.i = icmp sgt i32 %sub.i, 1
br i1 %cmp.i, label %while.body.i, label %f.exit
f.exit: ; preds = %entry, %while.body.i
%2 = load i32, ptr %tab, align 4
%cmp = icmp eq i32 %2, 2
%3 = load i32, ptr %arrayidx, align 4
%cmp4 = icmp eq i32 %3, 1
%or.cond = and i1 %cmp, %cmp4
br i1 %or.cond, label %if.end, label %if.then
if.then: ; preds = %f.exit
unreachable
if.end: ; preds = %f.exit
ret i32 0
}
; CHECK-LABEL: Function: reverse: 6 pointers, 0 call sites
; CHECK: MustAlias: i8* %tab, [10 x i32]* %tab
; CHECK: MustAlias: i32* %tab, [10 x i32]* %tab
; CHECK: MustAlias: i32* %tab, i8* %tab
; CHECK: PartialAlias (off -36): i32* %arrayidx1, [10 x i32]* %tab
; CHECK: NoAlias: i32* %arrayidx1, i8* %tab
; CHECK: NoAlias: i32* %arrayidx1, i32* %tab
; CHECK: MayAlias: i32* %incdec.ptr.i, [10 x i32]* %tab
; CHECK: MayAlias: i32* %incdec.ptr.i, i8* %tab
; CHECK: MayAlias: i32* %incdec.ptr.i, i32* %tab
; CHECK: MayAlias: i32* %arrayidx1, i32* %incdec.ptr.i
; CHECK: MayAlias: i32* %p.addr.05.i, [10 x i32]* %tab
; CHECK: MayAlias: i32* %p.addr.05.i, i8* %tab
; CHECK: MayAlias: i32* %p.addr.05.i, i32* %tab
; CHECK: MayAlias: i32* %arrayidx1, i32* %p.addr.05.i
; CHECK: NoAlias: i32* %incdec.ptr.i, i32* %p.addr.05.i
define i32 @reverse() nounwind {
entry:
%tab = alloca [10 x i32], align 4
%ignore1 = load [10 x i32], ptr %tab
%ignore2 = load i8, ptr %tab
store i32 0, ptr %tab, align 4
%arrayidx1 = getelementptr inbounds [10 x i32], ptr %tab, i32 0, i32 9
store i32 0, ptr %arrayidx1, align 4
%0 = add i32 1, 1
%cmp4.i = icmp slt i32 %0, 2
br i1 %cmp4.i, label %while.body.i, label %f.exit
while.body.i: ; preds = %while.body.i, %entry
%1 = phi i32 [ 1, %while.body.i ], [ %0, %entry ]
%foo.06.i = phi i32 [ %sub.i, %while.body.i ], [ 2, %entry ]
%p.addr.05.i = phi ptr [ %incdec.ptr.i, %while.body.i ], [ %arrayidx1, %entry ]
%sub.i = sub nsw i32 %foo.06.i, %1
%incdec.ptr.i = getelementptr inbounds i32, ptr %p.addr.05.i, i32 -1
%ignore3 = load i32, ptr %incdec.ptr.i
store i32 %sub.i, ptr %p.addr.05.i, align 4
%cmp.i = icmp sgt i32 %sub.i, 1
br i1 %cmp.i, label %while.body.i, label %f.exit
f.exit: ; preds = %entry, %while.body.i
%2 = load i32, ptr %arrayidx1, align 4
%cmp = icmp eq i32 %2, 2
%3 = load i32, ptr %tab, align 4
%cmp4 = icmp eq i32 %3, 1
%or.cond = and i1 %cmp, %cmp4
br i1 %or.cond, label %if.end, label %if.then
if.then: ; preds = %f.exit
unreachable
if.end: ; preds = %f.exit
ret i32 0
}
; CHECK-LABEL: Function: negative: 5 pointers, 1 call sites
; CHECK: PartialAlias (off -4): i16* %_tmp1, [3 x i16]* %int_arr.10
; CHECK: MayAlias: [3 x i16]* %int_arr.10, i16* %ls1.9.0
; CHECK: MayAlias: i16* %_tmp1, i16* %ls1.9.0
; CHECK: MayAlias: i16* %_tmp7, [3 x i16]* %int_arr.10
; CHECK: MayAlias: i16* %_tmp1, i16* %_tmp7
; CHECK: NoAlias: i16* %_tmp7, i16* %ls1.9.0
; CHECK: PartialAlias (off -2): i16* %_tmp11, [3 x i16]* %int_arr.10
; CHECK: NoAlias: i16* %_tmp1, i16* %_tmp11
; CHECK: MayAlias: i16* %_tmp11, i16* %ls1.9.0
; CHECK: MayAlias: i16* %_tmp11, i16* %_tmp7
; CHECK: NoModRef: Ptr: [3 x i16]* %int_arr.10 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
; CHECK: NoModRef: Ptr: i16* %_tmp1 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
; CHECK: Both ModRef: Ptr: i16* %ls1.9.0 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
; CHECK: Both ModRef: Ptr: i16* %_tmp7 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
; CHECK: NoModRef: Ptr: i16* %_tmp11 <-> %_tmp16 = call i16 @call(i32 %_tmp13)
define i16 @negative(i16 %argc.5.par) {
%int_arr.10 = alloca [3 x i16], align 1
load [3 x i16], ptr %int_arr.10
%_tmp1 = getelementptr inbounds [3 x i16], ptr %int_arr.10, i16 0, i16 2
load i16, ptr %_tmp1
br label %bb1
bb1: ; preds = %bb1, %0
%i.7.0 = phi i16 [ 2, %0 ], [ %_tmp5, %bb1 ]
%ls1.9.0 = phi ptr [ %_tmp1, %0 ], [ %_tmp7, %bb1 ]
store i16 %i.7.0, ptr %ls1.9.0, align 1
%_tmp5 = add nsw i16 %i.7.0, -1
%_tmp7 = getelementptr i16, ptr %ls1.9.0, i16 -1
load i16, ptr %_tmp7
%_tmp9 = icmp sgt i16 %i.7.0, 0
br i1 %_tmp9, label %bb1, label %bb3
bb3: ; preds = %bb1
%_tmp11 = getelementptr inbounds [3 x i16], ptr %int_arr.10, i16 0, i16 1
%_tmp12 = load i16, ptr %_tmp11, align 1
%_tmp13 = sext i16 %_tmp12 to i32
%_tmp16 = call i16 @call(i32 %_tmp13)
%_tmp18.not = icmp eq i16 %_tmp12, 1
br i1 %_tmp18.not, label %bb5, label %bb4
bb4: ; preds = %bb3
ret i16 1
bb5: ; preds = %bb3, %bb4
ret i16 0
}
; CHECK-LABEL: Function: dynamic_offset
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: MayAlias: i8* %p, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p
; CHECK: MayAlias: i8* %p.base, i8* %p.next
; CHECK: NoAlias: i8* %a, i8* %p.next
; CHECK: MayAlias: i8* %p, i8* %p.next
define void @dynamic_offset(i1 %c, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %loop
loop:
%p = phi ptr [ %p.base, %entry ], [ %p.next, %loop ]
%offset = call i16 @call(i32 0)
%p.next = getelementptr inbounds i8, ptr %p, i16 %offset
load i8, ptr %p
load i8, ptr %p.next
br i1 %c, label %loop, label %exit
exit:
ret void
}
; TODO: Currently yields an asymmetric result.
; CHECK-LABEL: Function: symmetry
; CHECK: MayAlias: i32* %p, i32* %p.base
; CHECK: MayAlias: i32* %p.base, i32* %p.next
; CHECK: NoAlias: i32* %p, i32* %p.next
; CHECK: MayAlias: i32* %p.base, i32* %result
; CHECK: NoAlias: i32* %p, i32* %result
; CHECK: MustAlias: i32* %p.next, i32* %result
define ptr @symmetry(ptr %p.base, i1 %c) {
entry:
load i32, ptr %p.base
br label %loop
loop:
%p = phi ptr [ %p.base, %entry ], [ %p.next, %loop ]
%p.next = getelementptr inbounds i32, ptr %p, i32 1
load i32, ptr %p
load i32, ptr %p.next
br i1 %c, label %loop, label %exit
exit:
%result = phi ptr [ %p.next, %loop ]
load i32, ptr %result
ret ptr %result
}
; FIXME: %a and %p.inner do not alias.
; CHECK-LABEL: Function: nested_loop
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p.outer
; CHECK: MayAlias: i8* %a, i8* %p.inner
; CHECK: NoAlias: i8* %a, i8* %p.inner.next
; CHECK: NoAlias: i8* %a, i8* %p.outer.next
define void @nested_loop(i1 %c, i1 %c2, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %outer_loop
outer_loop:
%p.outer = phi ptr [ %p.base, %entry ], [ %p.outer.next, %outer_loop_latch ]
load i8, ptr %p.outer
br label %inner_loop
inner_loop:
%p.inner = phi ptr [ %p.outer, %outer_loop ], [ %p.inner.next, %inner_loop ]
%p.inner.next = getelementptr inbounds i8, ptr %p.inner, i64 1
load i8, ptr %p.inner
load i8, ptr %p.inner.next
br i1 %c, label %inner_loop, label %outer_loop_latch
outer_loop_latch:
%p.outer.next = getelementptr inbounds i8, ptr %p.inner, i64 10
load i8, ptr %p.outer.next
br i1 %c2, label %outer_loop, label %exit
exit:
ret void
}
; Same as the previous test case, but avoiding phi of phi.
; CHECK-LABEL: Function: nested_loop2
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p.outer
; CHECK: NoAlias: i8* %a, i8* %p.outer.next
; CHECK: MayAlias: i8* %a, i8* %p.inner
; CHECK: NoAlias: i8* %a, i8* %p.inner.next
; TODO: (a, p.inner) could be NoAlias
define void @nested_loop2(i1 %c, i1 %c2, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %outer_loop
outer_loop:
%p.outer = phi ptr [ %p.base, %entry ], [ %p.outer.next, %outer_loop_latch ]
%p.outer.next = getelementptr inbounds i8, ptr %p.outer, i64 10
load i8, ptr %p.outer
load i8, ptr %p.outer.next
br label %inner_loop
inner_loop:
%p.inner = phi ptr [ %p.outer.next, %outer_loop ], [ %p.inner.next, %inner_loop ]
%p.inner.next = getelementptr inbounds i8, ptr %p.inner, i64 1
load i8, ptr %p.inner
load i8, ptr %p.inner.next
br i1 %c, label %inner_loop, label %outer_loop_latch
outer_loop_latch:
br i1 %c2, label %outer_loop, label %exit
exit:
ret void
}
; CHECK-LABEL: Function: nested_loop3
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p.outer
; CHECK: NoAlias: i8* %a, i8* %p.outer.next
; CHECK: NoAlias: i8* %a, i8* %p.inner
; CHECK: NoAlias: i8* %a, i8* %p.inner.next
define void @nested_loop3(i1 %c, i1 %c2, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %outer_loop
outer_loop:
%p.outer = phi ptr [ %p.base, %entry ], [ %p.outer.next, %outer_loop_latch ]
%p.outer.next = getelementptr inbounds i8, ptr %p.outer, i64 10
load i8, ptr %p.outer
load i8, ptr %p.outer.next
br label %inner_loop
inner_loop:
%p.inner = phi ptr [ %p.outer, %outer_loop ], [ %p.inner.next, %inner_loop ]
%p.inner.next = getelementptr inbounds i8, ptr %p.inner, i64 1
load i8, ptr %p.inner
load i8, ptr %p.inner.next
br i1 %c, label %inner_loop, label %outer_loop_latch
outer_loop_latch:
br i1 %c2, label %outer_loop, label %exit
exit:
ret void
}
; CHECK-LABEL: Function: sibling_loop
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p1
; CHECK: NoAlias: i8* %a, i8* %p1.next
; CHECK: MayAlias: i8* %a, i8* %p2
; CHECK: NoAlias: i8* %a, i8* %p2.next
; TODO: %p2 does not alias %a
define void @sibling_loop(i1 %c, i1 %c2, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %loop1
loop1:
%p1 = phi ptr [ %p.base, %entry ], [ %p1.next, %loop1 ]
%p1.next = getelementptr inbounds i8, ptr %p1, i64 10
load i8, ptr %p1
load i8, ptr %p1.next
br i1 %c, label %loop1, label %loop2
loop2:
%p2 = phi ptr [ %p1.next, %loop1 ], [ %p2.next, %loop2 ]
%p2.next = getelementptr inbounds i8, ptr %p2, i64 1
load i8, ptr %p2
load i8, ptr %p2.next
br i1 %c2, label %loop2, label %exit
exit:
ret void
}
; CHECK-LABEL: Function: sibling_loop2
; CHECK: NoAlias: i8* %a, i8* %p.base
; CHECK: NoAlias: i8* %a, i8* %p1
; CHECK: NoAlias: i8* %a, i8* %p1.next
; CHECK: NoAlias: i8* %a, i8* %p2
; CHECK: NoAlias: i8* %a, i8* %p2.next
define void @sibling_loop2(i1 %c, i1 %c2, ptr noalias %p.base) {
entry:
%a = alloca i8
load i8, ptr %p.base
load i8, ptr %a
br label %loop1
loop1:
%p1 = phi ptr [ %p.base, %entry ], [ %p1.next, %loop1 ]
%p1.next = getelementptr inbounds i8, ptr %p1, i64 10
load i8, ptr %p1
load i8, ptr %p1.next
br i1 %c, label %loop1, label %loop2
loop2:
%p2 = phi ptr [ %p1, %loop1 ], [ %p2.next, %loop2 ]
%p2.next = getelementptr inbounds i8, ptr %p2, i64 1
load i8, ptr %p2
load i8, ptr %p2.next
br i1 %c2, label %loop2, label %exit
exit:
ret void
}
; CHECK: MustAlias: i8* %a, i8* %phi
define void @phi_contains_self() {
entry:
%a = alloca i32
load i8, ptr %a
br label %loop
loop:
%phi = phi ptr [ %phi, %loop ], [ %a, %entry ]
load i8, ptr %phi
br label %loop
}
declare i16 @call(i32)
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