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| ; RUN: opt -attributor -attributor-manifest-internal --attributor-disable=false -attributor-max-iterations-verify -attributor-max-iterations=2 -S < %s | FileCheck %s --check-prefix=ATTRIBUTOR
declare void @deref_phi_user(i32* %a);
; TEST 1
; take mininimum of return values
;
define i32* @test1(i32* dereferenceable(4) %0, double* dereferenceable(8) %1, i1 zeroext %2) local_unnamed_addr {
; ATTRIBUTOR: define nonnull dereferenceable(4) i32* @test1(i32* nonnull readnone dereferenceable(4) "no-capture-maybe-returned" %0, double* nonnull readnone dereferenceable(8) "no-capture-maybe-returned" %1, i1 zeroext %2)
%4 = bitcast double* %1 to i32*
%5 = select i1 %2, i32* %0, i32* %4
ret i32* %5
}
; TEST 2
define i32* @test2(i32* dereferenceable_or_null(4) %0, double* dereferenceable(8) %1, i1 zeroext %2) local_unnamed_addr {
; ATTRIBUTOR: define dereferenceable_or_null(4) i32* @test2(i32* readnone dereferenceable_or_null(4) "no-capture-maybe-returned" %0, double* nonnull readnone dereferenceable(8) "no-capture-maybe-returned" %1, i1 zeroext %2)
%4 = bitcast double* %1 to i32*
%5 = select i1 %2, i32* %0, i32* %4
ret i32* %5
}
; TEST 3
; GEP inbounds
define i32* @test3_1(i32* dereferenceable(8) %0) local_unnamed_addr {
; ATTRIBUTOR: define nonnull dereferenceable(4) i32* @test3_1(i32* nonnull readnone dereferenceable(8) "no-capture-maybe-returned" %0)
%ret = getelementptr inbounds i32, i32* %0, i64 1
ret i32* %ret
}
define i32* @test3_2(i32* dereferenceable_or_null(32) %0) local_unnamed_addr {
; FIXME: Argument should be mark dereferenceable because of GEP `inbounds`.
; ATTRIBUTOR: define nonnull dereferenceable(16) i32* @test3_2(i32* readnone dereferenceable_or_null(32) "no-capture-maybe-returned" %0)
%ret = getelementptr inbounds i32, i32* %0, i64 4
ret i32* %ret
}
define i32* @test3_3(i32* dereferenceable(8) %0, i32* dereferenceable(16) %1, i1 %2) local_unnamed_addr {
; ATTRIBUTOR: define nonnull dereferenceable(4) i32* @test3_3(i32* nonnull readnone dereferenceable(8) "no-capture-maybe-returned" %0, i32* nonnull readnone dereferenceable(16) "no-capture-maybe-returned" %1, i1 %2) local_unnamed_addr
%ret1 = getelementptr inbounds i32, i32* %0, i64 1
%ret2 = getelementptr inbounds i32, i32* %1, i64 2
%ret = select i1 %2, i32* %ret1, i32* %ret2
ret i32* %ret
}
; TEST 4
; Better than known in IR.
define dereferenceable(4) i32* @test4(i32* dereferenceable(8) %0) local_unnamed_addr {
; ATTRIBUTOR: define nonnull dereferenceable(8) i32* @test4(i32* nonnull readnone returned dereferenceable(8) "no-capture-maybe-returned" %0)
ret i32* %0
}
; TEST 5
; loop in which dereferenceabily "grows"
define void @deref_phi_growing(i32* dereferenceable(4000) %a) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%a.addr.0 = phi i32* [ %a, %entry ], [ %incdec.ptr, %for.inc ]
; ATTRIBUTOR: call void @deref_phi_user(i32* nonnull dereferenceable(4000) %a.addr.0)
call void @deref_phi_user(i32* %a.addr.0)
%tmp = load i32, i32* %a.addr.0, align 4
%cmp = icmp slt i32 %i.0, %tmp
br i1 %cmp, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond
br label %for.end
for.body: ; preds = %for.cond
br label %for.inc
for.inc: ; preds = %for.body
%incdec.ptr = getelementptr inbounds i32, i32* %a.addr.0, i64 -1
%inc = add nuw nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond.cleanup
ret void
}
; TEST 6
; loop in which dereferenceabily "shrinks"
define void @deref_phi_shrinking(i32* dereferenceable(4000) %a) {
entry:
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
%a.addr.0 = phi i32* [ %a, %entry ], [ %incdec.ptr, %for.inc ]
; ATTRIBUTOR: call void @deref_phi_user(i32* nonnull %a.addr.0)
call void @deref_phi_user(i32* %a.addr.0)
%tmp = load i32, i32* %a.addr.0, align 4
%cmp = icmp slt i32 %i.0, %tmp
br i1 %cmp, label %for.body, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.cond
br label %for.end
for.body: ; preds = %for.cond
br label %for.inc
for.inc: ; preds = %for.body
%incdec.ptr = getelementptr inbounds i32, i32* %a.addr.0, i64 1
%inc = add nuw nsw i32 %i.0, 1
br label %for.cond
for.end: ; preds = %for.cond.cleanup
ret void
}
; TEST 7
; share known infomation in must-be-executed-context
declare i32* @unkown_ptr() willreturn nounwind
declare i32 @unkown_f(i32*) willreturn nounwind
define i32* @f7_0(i32* %ptr) {
; ATTRIBUTOR: define nonnull dereferenceable(8) i32* @f7_0(i32* nonnull returned dereferenceable(8) %ptr)
%T = tail call i32 @unkown_f(i32* dereferenceable(8) %ptr)
ret i32* %ptr
}
; ATTRIBUTOR: define void @f7_1(i32* nonnull dereferenceable(4) %ptr, i1 %c)
define void @f7_1(i32* %ptr, i1 %c) {
; ATTRIBUTOR: %A = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
%A = tail call i32 @unkown_f(i32* %ptr)
%ptr.0 = load i32, i32* %ptr
; deref 4 hold
; FIXME: this should be %B = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
; ATTRIBUTOR: %B = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
%B = tail call i32 @unkown_f(i32* dereferenceable(1) %ptr)
br i1%c, label %if.true, label %if.false
if.true:
; ATTRIBUTOR: %C = tail call i32 @unkown_f(i32* nonnull dereferenceable(8) %ptr)
%C = tail call i32 @unkown_f(i32* %ptr)
; ATTRIBUTOR: %D = tail call i32 @unkown_f(i32* nonnull dereferenceable(8) %ptr)
%D = tail call i32 @unkown_f(i32* dereferenceable(8) %ptr)
; FIXME: This should be tail call i32 @unkown_f(i32* nonnull dereferenceable(8) %ptr)
; Making must-be-executed-context backward exploration will fix this.
; ATTRIBUTOR: %E = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
%E = tail call i32 @unkown_f(i32* %ptr)
ret void
if.false:
ret void
}
; ATTRIBUTOR: define void @f7_2(i1 %c)
define void @f7_2(i1 %c) {
%ptr = tail call i32* @unkown_ptr()
; ATTRIBUTOR: %A = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
%A = tail call i32 @unkown_f(i32* %ptr)
%arg_a.0 = load i32, i32* %ptr
; deref 4 hold
; ATTRIBUTOR: %B = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
%B = tail call i32 @unkown_f(i32* dereferenceable(1) %ptr)
br i1%c, label %if.true, label %if.false
if.true:
; ATTRIBUTOR: %C = tail call i32 @unkown_f(i32* nonnull dereferenceable(8) %ptr)
%C = tail call i32 @unkown_f(i32* %ptr)
; ATTRIBUTOR: %D = tail call i32 @unkown_f(i32* nonnull dereferenceable(8) %ptr)
%D = tail call i32 @unkown_f(i32* dereferenceable(8) %ptr)
%E = tail call i32 @unkown_f(i32* %ptr)
; FIXME: This should be @unkown_f(i32* nonnull dereferenceable(8) %ptr)
; Making must-be-executed-context backward exploration will fix this.
; ATTRIBUTOR: %E = tail call i32 @unkown_f(i32* nonnull dereferenceable(4) %ptr)
ret void
if.false:
ret void
}
define i32* @f7_3() {
; ATTRIBUTOR: define nonnull dereferenceable(4) i32* @f7_3()
%ptr = tail call i32* @unkown_ptr()
store i32 10, i32* %ptr, align 16
ret i32* %ptr
}
define i32* @test_for_minus_index(i32* %p) {
; FIXME: This should be define nonnull dereferenceable(8) i32* @test_for_minus_index(i32* nonnull %p)
; ATTRIBUTOR: define nonnull dereferenceable(8) i32* @test_for_minus_index(i32* writeonly "no-capture-maybe-returned" %p)
%q = getelementptr inbounds i32, i32* %p, i32 -2
store i32 1, i32* %q
ret i32* %q
}
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