; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal  -attributor-annotate-decl-cs  -S < %s | FileCheck %s --check-prefixes=CHECK,TUNIT
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal  -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,CGSCC

@g = global ptr null		; <ptr> [#uses=1]

;.
; CHECK: @[[G:[a-zA-Z0-9_$"\\.-]+]] = global ptr null
; CHECK: @[[LOOKUP_TABLE:[a-zA-Z0-9_$"\\.-]+]] = global [2 x i1] [i1 false, i1 true]
; CHECK: @[[G2:[a-zA-Z0-9_$"\\.-]+]] = global ptr null
; CHECK: @[[G3:[a-zA-Z0-9_$"\\.-]+]] = global ptr null
;.
define ptr @c1(ptr %q) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@c1
; CHECK-SAME: (ptr nofree readnone returned "no-capture-maybe-returned" [[Q:%.*]]) #[[ATTR0:[0-9]+]] {
; CHECK-NEXT:    ret ptr [[Q]]
;
  ret ptr %q
}

; It would also be acceptable to mark %q as readnone. Update @c3 too.
define void @c2(ptr %q) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write)
; CHECK-LABEL: define {{[^@]+}}@c2
; CHECK-SAME: (ptr nofree writeonly [[Q:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT:    store ptr [[Q]], ptr @g, align 8
; CHECK-NEXT:    ret void
;
  store ptr %q, ptr @g
  ret void
}

define void @c3(ptr %q) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write)
; TUNIT-LABEL: define {{[^@]+}}@c3
; TUNIT-SAME: (ptr nofree writeonly [[Q:%.*]]) #[[ATTR1]] {
; TUNIT-NEXT:    call void @c2(ptr nofree writeonly [[Q]]) #[[ATTR17:[0-9]+]]
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree nosync nounwind willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@c3
; CGSCC-SAME: (ptr nofree writeonly [[Q:%.*]]) #[[ATTR2:[0-9]+]] {
; CGSCC-NEXT:    call void @c2(ptr nofree writeonly [[Q]]) #[[ATTR20:[0-9]+]]
; CGSCC-NEXT:    ret void
;
  call void @c2(ptr %q)
  ret void
}

define i1 @c4(ptr %q, i32 %bitno) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@c4
; CHECK-SAME: (ptr nofree readnone [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP:%.*]] = ptrtoint ptr [[Q]] to i32
; CHECK-NEXT:    [[TRUETMP2:%.*]] = lshr i32 [[TMP]], [[BITNO]]
; CHECK-NEXT:    [[BIT:%.*]] = trunc i32 [[TRUETMP2]] to i1
; CHECK-NEXT:    br i1 [[BIT]], label [[L1:%.*]], label [[L0:%.*]]
; CHECK:       l0:
; CHECK-NEXT:    ret i1 false
; CHECK:       l1:
; CHECK-NEXT:    ret i1 true
;
  %tmp = ptrtoint ptr %q to i32
  %tmp2 = lshr i32 %tmp, %bitno
  %bit = trunc i32 %tmp2 to i1
  br i1 %bit, label %l1, label %l0
l0:
  ret i1 0 ; escaping value not caught by def-use chaining.
l1:
  ret i1 1 ; escaping value not caught by def-use chaining.
}

; c4b is c4 but without the escaping part
define i1 @c4b(ptr %q, i32 %bitno) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@c4b
; CHECK-SAME: (ptr nocapture nofree readnone [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP:%.*]] = ptrtoint ptr [[Q]] to i32
; CHECK-NEXT:    [[TRUETMP2:%.*]] = lshr i32 [[TMP]], [[BITNO]]
; CHECK-NEXT:    [[BIT:%.*]] = trunc i32 [[TRUETMP2]] to i1
; CHECK-NEXT:    br i1 [[BIT]], label [[L1:%.*]], label [[L0:%.*]]
; CHECK:       l0:
; CHECK-NEXT:    ret i1 false
; CHECK:       l1:
; CHECK-NEXT:    ret i1 false
;
  %tmp = ptrtoint ptr %q to i32
  %tmp2 = lshr i32 %tmp, %bitno
  %bit = trunc i32 %tmp2 to i1
  br i1 %bit, label %l1, label %l0
l0:
  ret i1 0 ; not escaping!
l1:
  ret i1 0 ; not escaping!
}

@lookup_table = global [2 x i1] [ i1 0, i1 1 ]

define i1 @c5(ptr %q, i32 %bitno) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read)
; TUNIT-LABEL: define {{[^@]+}}@c5
; TUNIT-SAME: (ptr nofree readonly [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR2:[0-9]+]] {
; TUNIT-NEXT:    [[TMP:%.*]] = ptrtoint ptr [[Q]] to i32
; TUNIT-NEXT:    [[TRUETMP2:%.*]] = lshr i32 [[TMP]], [[BITNO]]
; TUNIT-NEXT:    [[BIT:%.*]] = and i32 [[TRUETMP2]], 1
; TUNIT-NEXT:    [[LOOKUP:%.*]] = getelementptr [2 x i1], ptr @lookup_table, i32 0, i32 [[BIT]]
; TUNIT-NEXT:    [[VAL:%.*]] = load i1, ptr [[LOOKUP]], align 1
; TUNIT-NEXT:    ret i1 [[VAL]]
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read)
; CGSCC-LABEL: define {{[^@]+}}@c5
; CGSCC-SAME: (ptr nofree readonly [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR3:[0-9]+]] {
; CGSCC-NEXT:    [[TMP:%.*]] = ptrtoint ptr [[Q]] to i32
; CGSCC-NEXT:    [[TRUETMP2:%.*]] = lshr i32 [[TMP]], [[BITNO]]
; CGSCC-NEXT:    [[BIT:%.*]] = and i32 [[TRUETMP2]], 1
; CGSCC-NEXT:    [[LOOKUP:%.*]] = getelementptr [2 x i1], ptr @lookup_table, i32 0, i32 [[BIT]]
; CGSCC-NEXT:    [[VAL:%.*]] = load i1, ptr [[LOOKUP]], align 1
; CGSCC-NEXT:    ret i1 [[VAL]]
;
  %tmp = ptrtoint ptr %q to i32
  %tmp2 = lshr i32 %tmp, %bitno
  %bit = and i32 %tmp2, 1
  ; subtle escape mechanism follows
  %lookup = getelementptr [2 x i1], ptr @lookup_table, i32 0, i32 %bit
  %val = load i1, ptr %lookup
  ret i1 %val
}

declare void @throw_if_bit_set(ptr, i8) readonly

define i1 @c6(ptr %q, i8 %bit) personality ptr @__gxx_personality_v0 {
; TUNIT: Function Attrs: nosync memory(read)
; TUNIT-LABEL: define {{[^@]+}}@c6
; TUNIT-SAME: (ptr readonly [[Q:%.*]], i8 [[BIT:%.*]]) #[[ATTR4:[0-9]+]] personality ptr @__gxx_personality_v0 {
; TUNIT-NEXT:    invoke void @throw_if_bit_set(ptr readonly [[Q]], i8 [[BIT]]) #[[ATTR4]]
; TUNIT-NEXT:    to label [[RET0:%.*]] unwind label [[RET1:%.*]]
; TUNIT:       ret0:
; TUNIT-NEXT:    ret i1 false
; TUNIT:       ret1:
; TUNIT-NEXT:    [[EXN:%.*]] = landingpad { ptr, i32 }
; TUNIT-NEXT:    cleanup
; TUNIT-NEXT:    ret i1 true
;
; CGSCC: Function Attrs: nosync memory(read)
; CGSCC-LABEL: define {{[^@]+}}@c6
; CGSCC-SAME: (ptr readonly [[Q:%.*]], i8 [[BIT:%.*]]) #[[ATTR5:[0-9]+]] personality ptr @__gxx_personality_v0 {
; CGSCC-NEXT:    invoke void @throw_if_bit_set(ptr readonly [[Q]], i8 [[BIT]]) #[[ATTR5]]
; CGSCC-NEXT:    to label [[RET0:%.*]] unwind label [[RET1:%.*]]
; CGSCC:       ret0:
; CGSCC-NEXT:    ret i1 false
; CGSCC:       ret1:
; CGSCC-NEXT:    [[EXN:%.*]] = landingpad { ptr, i32 }
; CGSCC-NEXT:    cleanup
; CGSCC-NEXT:    ret i1 true
;
  invoke void @throw_if_bit_set(ptr %q, i8 %bit)
  to label %ret0 unwind label %ret1
ret0:
  ret i1 0
ret1:
  %exn = landingpad {ptr, i32}
  cleanup
  ret i1 1
}

declare i32 @__gxx_personality_v0(...)

define ptr @lookup_bit(ptr %q, i32 %bitno) readnone nounwind {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@lookup_bit
; CHECK-SAME: (ptr nofree readnone [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP:%.*]] = ptrtoint ptr [[Q]] to i32
; CHECK-NEXT:    [[TRUETMP2:%.*]] = lshr i32 [[TMP]], [[BITNO]]
; CHECK-NEXT:    [[BIT:%.*]] = and i32 [[TRUETMP2]], 1
; CHECK-NEXT:    [[LOOKUP:%.*]] = getelementptr [2 x i1], ptr @lookup_table, i32 0, i32 [[BIT]]
; CHECK-NEXT:    ret ptr [[LOOKUP]]
;
  %tmp = ptrtoint ptr %q to i32
  %tmp2 = lshr i32 %tmp, %bitno
  %bit = and i32 %tmp2, 1
  %lookup = getelementptr [2 x i1], ptr @lookup_table, i32 0, i32 %bit
  ret ptr %lookup
}

define i1 @c7(ptr %q, i32 %bitno) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read)
; TUNIT-LABEL: define {{[^@]+}}@c7
; TUNIT-SAME: (ptr nofree readonly [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR2]] {
; TUNIT-NEXT:    [[PTR:%.*]] = call ptr @lookup_bit(ptr noalias nofree readnone [[Q]], i32 [[BITNO]]) #[[ATTR18:[0-9]+]]
; TUNIT-NEXT:    [[VAL:%.*]] = load i1, ptr [[PTR]], align 1
; TUNIT-NEXT:    ret i1 [[VAL]]
;
; CGSCC: Function Attrs: mustprogress nofree nosync nounwind willreturn memory(read)
; CGSCC-LABEL: define {{[^@]+}}@c7
; CGSCC-SAME: (ptr nofree readonly [[Q:%.*]], i32 [[BITNO:%.*]]) #[[ATTR6:[0-9]+]] {
; CGSCC-NEXT:    [[PTR:%.*]] = call ptr @lookup_bit(ptr noalias nofree readnone [[Q]], i32 [[BITNO]]) #[[ATTR21:[0-9]+]]
; CGSCC-NEXT:    [[VAL:%.*]] = load i1, ptr [[PTR]], align 1
; CGSCC-NEXT:    ret i1 [[VAL]]
;
  %ptr = call ptr @lookup_bit(ptr %q, i32 %bitno)
  %val = load i1, ptr %ptr
  ret i1 %val
}


define i32 @nc1(ptr %q, ptr %p, i1 %b) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; TUNIT-LABEL: define {{[^@]+}}@nc1
; TUNIT-SAME: (ptr nofree [[Q:%.*]], ptr nocapture nofree [[P:%.*]], i1 [[B:%.*]]) #[[ATTR5:[0-9]+]] {
; TUNIT-NEXT:  e:
; TUNIT-NEXT:    br label [[L:%.*]]
; TUNIT:       l:
; TUNIT-NEXT:    [[X:%.*]] = phi ptr [ [[P]], [[E:%.*]] ]
; TUNIT-NEXT:    [[Y:%.*]] = phi ptr [ [[Q]], [[E]] ]
; TUNIT-NEXT:    [[TRUETMP2:%.*]] = select i1 [[B]], ptr [[P]], ptr [[Q]]
; TUNIT-NEXT:    [[VAL:%.*]] = load i32, ptr [[TRUETMP2]], align 4
; TUNIT-NEXT:    store i32 0, ptr [[P]], align 4
; TUNIT-NEXT:    store ptr [[Q]], ptr @g, align 8
; TUNIT-NEXT:    ret i32 [[VAL]]
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@nc1
; CGSCC-SAME: (ptr nofree [[Q:%.*]], ptr nocapture nofree [[P:%.*]], i1 [[B:%.*]]) #[[ATTR7:[0-9]+]] {
; CGSCC-NEXT:  e:
; CGSCC-NEXT:    br label [[L:%.*]]
; CGSCC:       l:
; CGSCC-NEXT:    [[X:%.*]] = phi ptr [ [[P]], [[E:%.*]] ]
; CGSCC-NEXT:    [[Y:%.*]] = phi ptr [ [[Q]], [[E]] ]
; CGSCC-NEXT:    [[TRUETMP2:%.*]] = select i1 [[B]], ptr [[P]], ptr [[Q]]
; CGSCC-NEXT:    [[VAL:%.*]] = load i32, ptr [[TRUETMP2]], align 4
; CGSCC-NEXT:    store i32 0, ptr [[P]], align 4
; CGSCC-NEXT:    store ptr [[Q]], ptr @g, align 8
; CGSCC-NEXT:    ret i32 [[VAL]]
;
e:
  br label %l
l:
  %x = phi ptr [ %p, %e ]
  %y = phi ptr [ %q, %e ]
  %tmp2 = select i1 %b, ptr %x, ptr %y
  %val = load i32, ptr %tmp2		; <i32> [#uses=1]
  store i32 0, ptr %x
  store ptr %y, ptr @g
  ret i32 %val
}

define i32 @nc1_addrspace(ptr %q, ptr addrspace(1) %p, i1 %b) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; TUNIT-LABEL: define {{[^@]+}}@nc1_addrspace
; TUNIT-SAME: (ptr nofree [[Q:%.*]], ptr addrspace(1) nocapture nofree [[P:%.*]], i1 [[B:%.*]]) #[[ATTR5]] {
; TUNIT-NEXT:  e:
; TUNIT-NEXT:    br label [[L:%.*]]
; TUNIT:       l:
; TUNIT-NEXT:    [[X:%.*]] = phi ptr addrspace(1) [ [[P]], [[E:%.*]] ]
; TUNIT-NEXT:    [[Y:%.*]] = phi ptr [ [[Q]], [[E]] ]
; TUNIT-NEXT:    [[TMP:%.*]] = addrspacecast ptr addrspace(1) [[P]] to ptr
; TUNIT-NEXT:    [[TRUETMP2:%.*]] = select i1 [[B]], ptr [[TMP]], ptr [[Q]]
; TUNIT-NEXT:    [[VAL:%.*]] = load i32, ptr [[TRUETMP2]], align 4
; TUNIT-NEXT:    store i32 0, ptr addrspace(1) [[P]], align 4
; TUNIT-NEXT:    store ptr [[Q]], ptr @g, align 8
; TUNIT-NEXT:    ret i32 [[VAL]]
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@nc1_addrspace
; CGSCC-SAME: (ptr nofree [[Q:%.*]], ptr addrspace(1) nocapture nofree [[P:%.*]], i1 [[B:%.*]]) #[[ATTR7]] {
; CGSCC-NEXT:  e:
; CGSCC-NEXT:    br label [[L:%.*]]
; CGSCC:       l:
; CGSCC-NEXT:    [[X:%.*]] = phi ptr addrspace(1) [ [[P]], [[E:%.*]] ]
; CGSCC-NEXT:    [[Y:%.*]] = phi ptr [ [[Q]], [[E]] ]
; CGSCC-NEXT:    [[TMP:%.*]] = addrspacecast ptr addrspace(1) [[P]] to ptr
; CGSCC-NEXT:    [[TRUETMP2:%.*]] = select i1 [[B]], ptr [[TMP]], ptr [[Q]]
; CGSCC-NEXT:    [[VAL:%.*]] = load i32, ptr [[TRUETMP2]], align 4
; CGSCC-NEXT:    store i32 0, ptr addrspace(1) [[P]], align 4
; CGSCC-NEXT:    store ptr [[Q]], ptr @g, align 8
; CGSCC-NEXT:    ret i32 [[VAL]]
;
e:
  br label %l
l:
  %x = phi ptr addrspace(1) [ %p, %e ]
  %y = phi ptr [ %q, %e ]
  %tmp = addrspacecast ptr addrspace(1) %x to ptr		; <ptr> [#uses=2]
  %tmp2 = select i1 %b, ptr %tmp, ptr %y
  %val = load i32, ptr %tmp2		; <i32> [#uses=1]
  store i32 0, ptr %tmp
  store ptr %y, ptr @g
  ret i32 %val
}

define void @nc2(ptr %p, ptr %q) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; TUNIT-LABEL: define {{[^@]+}}@nc2
; TUNIT-SAME: (ptr nocapture nofree [[P:%.*]], ptr nofree [[Q:%.*]]) #[[ATTR5]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = call i32 @nc1(ptr nofree [[Q]], ptr nocapture nofree [[P]], i1 noundef false) #[[ATTR19:[0-9]+]]
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree nosync nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@nc2
; CGSCC-SAME: (ptr nocapture nofree align 4 [[P:%.*]], ptr nofree [[Q:%.*]]) #[[ATTR8:[0-9]+]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = call i32 @nc1(ptr nofree [[Q]], ptr nocapture nofree align 4 [[P]], i1 noundef false) #[[ATTR22:[0-9]+]]
; CGSCC-NEXT:    ret void
;
  %1 = call i32 @nc1(ptr %q, ptr %p, i1 0)		; <i32> [#uses=0]
  ret void
}


define void @nc3(ptr %p) {
; CHECK-LABEL: define {{[^@]+}}@nc3
; CHECK-SAME: (ptr nocapture nofree noundef nonnull [[P:%.*]]) {
; CHECK-NEXT:    call void [[P]]()
; CHECK-NEXT:    ret void
;
  call void %p()
  ret void
}

; The following test is tricky because improvements to AAIsDead can cause the call to be removed.
; FIXME: readonly and nocapture missing on the pointer.
declare void @external(ptr readonly) nounwind argmemonly
define void @nc4(ptr %p) {
; TUNIT: Function Attrs: nounwind memory(argmem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@nc4
; TUNIT-SAME: (ptr nofree [[P:%.*]]) #[[ATTR6:[0-9]+]] {
; TUNIT-NEXT:    call void @external(ptr nofree readonly [[P]]) #[[ATTR20:[0-9]+]]
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: nounwind memory(argmem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@nc4
; CGSCC-SAME: (ptr nofree [[P:%.*]]) #[[ATTR9:[0-9]+]] {
; CGSCC-NEXT:    call void @external(ptr nofree readonly [[P]]) #[[ATTR23:[0-9]+]]
; CGSCC-NEXT:    ret void
;
  call void @external(ptr %p)
  ret void
}

define void @nc5(ptr %f, ptr %p) {
; CHECK-LABEL: define {{[^@]+}}@nc5
; CHECK-SAME: (ptr nocapture nofree noundef nonnull [[F:%.*]], ptr nocapture [[P:%.*]]) {
; CHECK-NEXT:    call void [[F]](ptr nocapture [[P]])
; CHECK-NEXT:    ret void
;
  call void %f(ptr %p) readonly nounwind
  call void %f(ptr nocapture %p)
  ret void
}

; It would be acceptable to add readnone to %y1_1 and %y1_2.
define void @test1_1(ptr %x1_1, ptr %y1_1, i1 %c) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test1_1
; TUNIT-SAME: (ptr nocapture nofree readnone [[X1_1:%.*]], ptr nocapture nofree readnone [[Y1_1:%.*]], i1 [[C:%.*]]) #[[ATTR7:[0-9]+]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = call ptr @test1_2(ptr noalias nocapture nofree readnone undef, ptr noalias nofree readnone "no-capture-maybe-returned" [[Y1_1]], i1 noundef [[C]]) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test1_1
; CGSCC-SAME: (ptr nocapture nofree readnone [[X1_1:%.*]], ptr nocapture nofree readnone [[Y1_1:%.*]], i1 [[C:%.*]]) #[[ATTR10:[0-9]+]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = call ptr @test1_2(ptr noalias nocapture nofree readnone undef, ptr noalias nofree readnone "no-capture-maybe-returned" [[Y1_1]], i1 noundef [[C]]) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    ret void
;
  call ptr @test1_2(ptr %x1_1, ptr %y1_1, i1 %c)
  store ptr null, ptr @g
  ret void
}

define ptr @test1_2(ptr %x1_2, ptr %y1_2, i1 %c) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test1_2
; TUNIT-SAME: (ptr nocapture nofree readnone [[X1_2:%.*]], ptr nofree readnone returned "no-capture-maybe-returned" [[Y1_2:%.*]], i1 noundef [[C:%.*]]) #[[ATTR7]] {
; TUNIT-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT:       t:
; TUNIT-NEXT:    call void @test1_1(ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone [[Y1_2]], i1 noundef [[C]]) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    br label [[F]]
; TUNIT:       f:
; TUNIT-NEXT:    ret ptr [[Y1_2]]
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test1_2
; CGSCC-SAME: (ptr nocapture nofree readnone [[X1_2:%.*]], ptr nofree readnone returned "no-capture-maybe-returned" [[Y1_2:%.*]], i1 noundef [[C:%.*]]) #[[ATTR10]] {
; CGSCC-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC:       t:
; CGSCC-NEXT:    call void @test1_1(ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone [[Y1_2]], i1 noundef [[C]]) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    br label [[F]]
; CGSCC:       f:
; CGSCC-NEXT:    ret ptr [[Y1_2]]
;
  br i1 %c, label %t, label %f
t:
  call void @test1_1(ptr %x1_2, ptr %y1_2, i1 %c)
  store ptr null, ptr @g
  br label %f
f:
  ret ptr %y1_2
}

define void @test2(ptr %x2) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test2
; TUNIT-SAME: (ptr nocapture nofree readnone [[X2:%.*]]) #[[ATTR7]] {
; TUNIT-NEXT:    call void @test2(ptr noalias nocapture nofree readnone undef) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test2
; CGSCC-SAME: (ptr nocapture nofree readnone [[X2:%.*]]) #[[ATTR10]] {
; CGSCC-NEXT:    call void @test2(ptr noalias nocapture nofree readnone undef) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    ret void
;
  call void @test2(ptr %x2)
  store ptr null, ptr @g
  ret void
}

define void @test3(ptr %x3, ptr %y3, ptr %z3) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test3
; TUNIT-SAME: (ptr nocapture nofree readnone [[X3:%.*]], ptr nocapture nofree readnone [[Y3:%.*]], ptr nocapture nofree readnone [[Z3:%.*]]) #[[ATTR7]] {
; TUNIT-NEXT:    call void @test3(ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone undef) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test3
; CGSCC-SAME: (ptr nocapture nofree readnone [[X3:%.*]], ptr nocapture nofree readnone [[Y3:%.*]], ptr nocapture nofree readnone [[Z3:%.*]]) #[[ATTR10]] {
; CGSCC-NEXT:    call void @test3(ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone undef, ptr noalias nocapture nofree readnone undef) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    ret void
;
  call void @test3(ptr %z3, ptr %y3, ptr %x3)
  store ptr null, ptr @g
  ret void
}

define void @test4_1(ptr %x4_1, i1 %c) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test4_1
; TUNIT-SAME: (ptr nocapture nofree readnone [[X4_1:%.*]], i1 [[C:%.*]]) #[[ATTR7]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = call ptr @test4_2(ptr noalias nocapture nofree readnone undef, ptr noalias nofree readnone "no-capture-maybe-returned" [[X4_1]], ptr noalias nocapture nofree readnone undef, i1 noundef [[C]]) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test4_1
; CGSCC-SAME: (ptr nocapture nofree readnone [[X4_1:%.*]], i1 [[C:%.*]]) #[[ATTR10]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = call ptr @test4_2(ptr noalias nocapture nofree readnone undef, ptr noalias nofree readnone "no-capture-maybe-returned" [[X4_1]], ptr noalias nocapture nofree readnone undef, i1 noundef [[C]]) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    ret void
;
  call ptr @test4_2(ptr %x4_1, ptr %x4_1, ptr %x4_1, i1 %c)
  store ptr null, ptr @g
  ret void
}

define ptr @test4_2(ptr %x4_2, ptr %y4_2, ptr %z4_2, i1 %c) {
; TUNIT: Function Attrs: nofree nosync nounwind memory(write)
; TUNIT-LABEL: define {{[^@]+}}@test4_2
; TUNIT-SAME: (ptr nocapture nofree readnone [[X4_2:%.*]], ptr nofree readnone returned "no-capture-maybe-returned" [[Y4_2:%.*]], ptr nocapture nofree readnone [[Z4_2:%.*]], i1 noundef [[C:%.*]]) #[[ATTR7]] {
; TUNIT-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; TUNIT:       t:
; TUNIT-NEXT:    call void @test4_1(ptr nofree noundef readnone align 4294967296 null, i1 noundef [[C]]) #[[ATTR7]]
; TUNIT-NEXT:    store ptr null, ptr @g, align 8
; TUNIT-NEXT:    br label [[F]]
; TUNIT:       f:
; TUNIT-NEXT:    ret ptr [[Y4_2]]
;
; CGSCC: Function Attrs: nofree nosync nounwind memory(write)
; CGSCC-LABEL: define {{[^@]+}}@test4_2
; CGSCC-SAME: (ptr nocapture nofree readnone [[X4_2:%.*]], ptr nofree readnone returned "no-capture-maybe-returned" [[Y4_2:%.*]], ptr nocapture nofree readnone [[Z4_2:%.*]], i1 noundef [[C:%.*]]) #[[ATTR10]] {
; CGSCC-NEXT:    br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; CGSCC:       t:
; CGSCC-NEXT:    call void @test4_1(ptr nofree noundef readnone align 4294967296 null, i1 noundef [[C]]) #[[ATTR10]]
; CGSCC-NEXT:    store ptr null, ptr @g, align 8
; CGSCC-NEXT:    br label [[F]]
; CGSCC:       f:
; CGSCC-NEXT:    ret ptr [[Y4_2]]
;
  br i1 %c, label %t, label %f
t:
  call void @test4_1(ptr null, i1 %c)
  store ptr null, ptr @g
  br label %f
f:
  ret ptr %y4_2
}

declare ptr @test5_1(ptr %x5_1)

define void @test5_2(ptr %x5_2) {
; CHECK-LABEL: define {{[^@]+}}@test5_2
; CHECK-SAME: (ptr [[X5_2:%.*]]) {
; CHECK-NEXT:    [[TMP1:%.*]] = call ptr @test5_1(ptr [[X5_2]])
; CHECK-NEXT:    store ptr null, ptr @g, align 8
; CHECK-NEXT:    ret void
;
  call ptr @test5_1(ptr %x5_2)
  store ptr null, ptr @g
  ret void
}

declare void @test6_1(ptr %x6_1, ptr nocapture %y6_1, ...)

define void @test6_2(ptr %x6_2, ptr %y6_2, ptr %z6_2) {
; CHECK-LABEL: define {{[^@]+}}@test6_2
; CHECK-SAME: (ptr [[X6_2:%.*]], ptr nocapture [[Y6_2:%.*]], ptr [[Z6_2:%.*]]) {
; CHECK-NEXT:    call void (ptr, ptr, ...) @test6_1(ptr [[X6_2]], ptr nocapture [[Y6_2]], ptr [[Z6_2]])
; CHECK-NEXT:    store ptr null, ptr @g, align 8
; CHECK-NEXT:    ret void
;
  call void (ptr, ptr, ...) @test6_1(ptr %x6_2, ptr %y6_2, ptr %z6_2)
  store ptr null, ptr @g
  ret void
}

define void @test_cmpxchg(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@test_cmpxchg
; TUNIT-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(4) [[P:%.*]]) #[[ATTR8:[0-9]+]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = cmpxchg ptr [[P]], i32 0, i32 1 acquire monotonic, align 4
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@test_cmpxchg
; CGSCC-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(4) [[P:%.*]]) #[[ATTR11:[0-9]+]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = cmpxchg ptr [[P]], i32 0, i32 1 acquire monotonic, align 4
; CGSCC-NEXT:    ret void
;
  cmpxchg ptr %p, i32 0, i32 1 acquire monotonic
  ret void
}

define void @test_cmpxchg_ptr(ptr %p, ptr %q) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@test_cmpxchg_ptr
; TUNIT-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(8) [[P:%.*]], ptr nofree [[Q:%.*]]) #[[ATTR8]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = cmpxchg ptr [[P]], ptr null, ptr [[Q]] acquire monotonic, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@test_cmpxchg_ptr
; CGSCC-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(8) [[P:%.*]], ptr nofree [[Q:%.*]]) #[[ATTR11]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = cmpxchg ptr [[P]], ptr null, ptr [[Q]] acquire monotonic, align 8
; CGSCC-NEXT:    ret void
;
  cmpxchg ptr %p, ptr null, ptr %q acquire monotonic
  ret void
}

define void @test_atomicrmw(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@test_atomicrmw
; TUNIT-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(4) [[P:%.*]]) #[[ATTR8]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = atomicrmw add ptr [[P]], i32 1 seq_cst, align 4
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@test_atomicrmw
; CGSCC-SAME: (ptr nocapture nofree noundef nonnull dereferenceable(4) [[P:%.*]]) #[[ATTR11]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = atomicrmw add ptr [[P]], i32 1 seq_cst, align 4
; CGSCC-NEXT:    ret void
;
  atomicrmw add ptr %p, i32 1 seq_cst
  ret void
}

define void @test_volatile(ptr %x) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@test_volatile
; TUNIT-SAME: (ptr nofree align 4 [[X:%.*]]) #[[ATTR8]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[X]], i64 1
; TUNIT-NEXT:    store volatile i32 0, ptr [[GEP]], align 4
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@test_volatile
; CGSCC-SAME: (ptr nofree align 4 [[X:%.*]]) #[[ATTR11]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[GEP:%.*]] = getelementptr i32, ptr [[X]], i64 1
; CGSCC-NEXT:    store volatile i32 0, ptr [[GEP]], align 4
; CGSCC-NEXT:    ret void
;
entry:
  %gep = getelementptr i32, ptr %x, i64 1
  store volatile i32 0, ptr %gep, align 4
  ret void
}

define void @nocaptureLaunder(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite)
; TUNIT-LABEL: define {{[^@]+}}@nocaptureLaunder
; TUNIT-SAME: (ptr nocapture nofree [[P:%.*]]) #[[ATTR9:[0-9]+]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[B:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr nofree [[P]]) #[[ATTR21:[0-9]+]]
; TUNIT-NEXT:    store i8 42, ptr [[B]], align 1
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite)
; CGSCC-LABEL: define {{[^@]+}}@nocaptureLaunder
; CGSCC-SAME: (ptr nocapture nofree [[P:%.*]]) #[[ATTR12:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[B:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr nofree [[P]]) #[[ATTR24:[0-9]+]]
; CGSCC-NEXT:    store i8 42, ptr [[B]], align 1
; CGSCC-NEXT:    ret void
;
entry:
  %b = call ptr @llvm.launder.invariant.group.p0(ptr %p)
  store i8 42, ptr %b
  ret void
}

@g2 = global ptr null
define void @captureLaunder(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; TUNIT-LABEL: define {{[^@]+}}@captureLaunder
; TUNIT-SAME: (ptr nofree [[P:%.*]]) #[[ATTR5]] {
; TUNIT-NEXT:    [[B:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr nofree [[P]]) #[[ATTR21]]
; TUNIT-NEXT:    store ptr [[B]], ptr @g2, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@captureLaunder
; CGSCC-SAME: (ptr nofree [[P:%.*]]) #[[ATTR7]] {
; CGSCC-NEXT:    [[B:%.*]] = call ptr @llvm.launder.invariant.group.p0(ptr nofree [[P]]) #[[ATTR24]]
; CGSCC-NEXT:    store ptr [[B]], ptr @g2, align 8
; CGSCC-NEXT:    ret void
;
  %b = call ptr @llvm.launder.invariant.group.p0(ptr %p)
  store ptr %b, ptr @g2
  ret void
}

define void @nocaptureStrip(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write)
; TUNIT-LABEL: define {{[^@]+}}@nocaptureStrip
; TUNIT-SAME: (ptr nocapture nofree writeonly [[P:%.*]]) #[[ATTR10:[0-9]+]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[B:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr noalias nofree readnone [[P]]) #[[ATTR22:[0-9]+]]
; TUNIT-NEXT:    store i8 42, ptr [[B]], align 1
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write)
; CGSCC-LABEL: define {{[^@]+}}@nocaptureStrip
; CGSCC-SAME: (ptr nocapture nofree writeonly [[P:%.*]]) #[[ATTR13:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[B:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr noalias nofree readnone [[P]]) #[[ATTR21]]
; CGSCC-NEXT:    store i8 42, ptr [[B]], align 1
; CGSCC-NEXT:    ret void
;
entry:
  %b = call ptr @llvm.strip.invariant.group.p0(ptr %p)
  store i8 42, ptr %b
  ret void
}

@g3 = global ptr null
define void @captureStrip(ptr %p) {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write)
; TUNIT-LABEL: define {{[^@]+}}@captureStrip
; TUNIT-SAME: (ptr nofree writeonly [[P:%.*]]) #[[ATTR1]] {
; TUNIT-NEXT:    [[B:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr noalias nofree readnone [[P]]) #[[ATTR22]]
; TUNIT-NEXT:    store ptr [[B]], ptr @g3, align 8
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write)
; CGSCC-LABEL: define {{[^@]+}}@captureStrip
; CGSCC-SAME: (ptr nofree writeonly [[P:%.*]]) #[[ATTR1]] {
; CGSCC-NEXT:    [[B:%.*]] = call ptr @llvm.strip.invariant.group.p0(ptr noalias nofree readnone [[P]]) #[[ATTR21]]
; CGSCC-NEXT:    store ptr [[B]], ptr @g3, align 8
; CGSCC-NEXT:    ret void
;
  %b = call ptr @llvm.strip.invariant.group.p0(ptr %p)
  store ptr %b, ptr @g3
  ret void
}

define i1 @captureICmp(ptr %x) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@captureICmp
; CHECK-SAME: (ptr nofree readnone [[X:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq ptr [[X]], null
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %1 = icmp eq ptr %x, null
  ret i1 %1
}

define i1 @captureICmpRev(ptr %x) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@captureICmpRev
; CHECK-SAME: (ptr nofree readnone [[X:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq ptr null, [[X]]
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %1 = icmp eq ptr null, %x
  ret i1 %1
}

define i1 @nocaptureInboundsGEPICmp(ptr %x) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@nocaptureInboundsGEPICmp
; CHECK-SAME: (ptr nocapture nofree readnone [[X:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    ret i1 false
;
  %1 = getelementptr inbounds i32, ptr %x, i32 5
  %2 = icmp eq ptr %1, null
  ret i1 %2
}

define i1 @nocaptureInboundsGEPICmpRev(ptr %x) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@nocaptureInboundsGEPICmpRev
; CHECK-SAME: (ptr nocapture nofree readnone [[X:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    ret i1 true
;
  %1 = getelementptr inbounds i32, ptr %x, i32 5
  %2 = icmp ne ptr null, %1
  ret i1 %2
}

define i1 @nocaptureDereferenceableOrNullICmp(ptr dereferenceable_or_null(4) %x) {
; CHECK: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; CHECK-LABEL: define {{[^@]+}}@nocaptureDereferenceableOrNullICmp
; CHECK-SAME: (ptr nocapture nofree noundef readnone dereferenceable_or_null(4) [[X:%.*]]) #[[ATTR0]] {
; CHECK-NEXT:    [[TMP1:%.*]] = icmp eq ptr [[X]], null
; CHECK-NEXT:    ret i1 [[TMP1]]
;
  %1 = icmp eq ptr %x, null
  ret i1 %1
}

define i1 @captureDereferenceableOrNullICmp(ptr dereferenceable_or_null(4) %x) null_pointer_is_valid {
; TUNIT: Function Attrs: mustprogress nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none)
; TUNIT-LABEL: define {{[^@]+}}@captureDereferenceableOrNullICmp
; TUNIT-SAME: (ptr nofree noundef readnone dereferenceable_or_null(4) [[X:%.*]]) #[[ATTR11:[0-9]+]] {
; TUNIT-NEXT:    [[TMP1:%.*]] = icmp eq ptr [[X]], null
; TUNIT-NEXT:    ret i1 [[TMP1]]
;
; CGSCC: Function Attrs: mustprogress nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none)
; CGSCC-LABEL: define {{[^@]+}}@captureDereferenceableOrNullICmp
; CGSCC-SAME: (ptr nofree noundef readnone dereferenceable_or_null(4) [[X:%.*]]) #[[ATTR14:[0-9]+]] {
; CGSCC-NEXT:    [[TMP1:%.*]] = icmp eq ptr [[X]], null
; CGSCC-NEXT:    ret i1 [[TMP1]]
;
  %1 = icmp eq ptr %x, null
  ret i1 %1
}

declare void @unknown(ptr)
; We know that 'null' in AS 0 does not alias anything and cannot be captured. Though the latter is not qurried -> derived atm.
define void @test_callsite() {
; CHECK-LABEL: define {{[^@]+}}@test_callsite() {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    call void @unknown(ptr noundef align 4294967296 null)
; CHECK-NEXT:    ret void
;
entry:
  call void @unknown(ptr null)
  ret void
}

declare ptr @unknownpi8pi8(ptr,ptr returned)
define ptr @test_returned1(ptr %A, ptr returned %B) nounwind readonly {
; TUNIT: Function Attrs: nosync nounwind memory(read)
; TUNIT-LABEL: define {{[^@]+}}@test_returned1
; TUNIT-SAME: (ptr nocapture [[A:%.*]], ptr returned [[B:%.*]]) #[[ATTR12:[0-9]+]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[P:%.*]] = call ptr @unknownpi8pi8(ptr [[A]], ptr [[B]])
; TUNIT-NEXT:    ret ptr [[P]]
;
; CGSCC: Function Attrs: nosync nounwind memory(read)
; CGSCC-LABEL: define {{[^@]+}}@test_returned1
; CGSCC-SAME: (ptr nocapture [[A:%.*]], ptr returned [[B:%.*]]) #[[ATTR15:[0-9]+]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[P:%.*]] = call ptr @unknownpi8pi8(ptr [[A]], ptr [[B]])
; CGSCC-NEXT:    ret ptr [[P]]
;
entry:
  %p = call ptr @unknownpi8pi8(ptr %A, ptr %B)
  ret ptr %p
}

define ptr @test_returned2(ptr %A, ptr %B) {
; TUNIT: Function Attrs: nosync nounwind memory(read)
; TUNIT-LABEL: define {{[^@]+}}@test_returned2
; TUNIT-SAME: (ptr readonly [[A:%.*]], ptr readonly [[B:%.*]]) #[[ATTR12]] {
; TUNIT-NEXT:  entry:
; TUNIT-NEXT:    [[P:%.*]] = call ptr @unknownpi8pi8(ptr readonly [[A]], ptr readonly [[B]]) #[[ATTR12]]
; TUNIT-NEXT:    ret ptr [[P]]
;
; CGSCC: Function Attrs: nosync nounwind memory(read)
; CGSCC-LABEL: define {{[^@]+}}@test_returned2
; CGSCC-SAME: (ptr readonly [[A:%.*]], ptr readonly [[B:%.*]]) #[[ATTR15]] {
; CGSCC-NEXT:  entry:
; CGSCC-NEXT:    [[P:%.*]] = call ptr @unknownpi8pi8(ptr readonly [[A]], ptr readonly [[B]]) #[[ATTR15]]
; CGSCC-NEXT:    ret ptr [[P]]
;
entry:
  %p = call ptr @unknownpi8pi8(ptr %A, ptr %B) nounwind readonly
  ret ptr %p
}

declare ptr @maybe_returned_ptr(ptr readonly %ptr) readonly nounwind willreturn
declare i8 @maybe_returned_val(ptr %ptr) readonly nounwind willreturn
declare void @val_use(i8 %ptr) readonly nounwind willreturn

; FIXME: Both pointers should be nocapture
define void @ptr_uses(ptr %ptr, ptr %wptr) {
; TUNIT: Function Attrs: mustprogress nosync nounwind willreturn
; TUNIT-LABEL: define {{[^@]+}}@ptr_uses
; TUNIT-SAME: (ptr nofree [[PTR:%.*]], ptr nocapture nofree noundef nonnull writeonly dereferenceable(1) [[WPTR:%.*]]) #[[ATTR14:[0-9]+]] {
; TUNIT-NEXT:    store i8 0, ptr [[WPTR]], align 1
; TUNIT-NEXT:    ret void
;
; CGSCC: Function Attrs: mustprogress nosync nounwind willreturn
; CGSCC-LABEL: define {{[^@]+}}@ptr_uses
; CGSCC-SAME: (ptr nofree [[PTR:%.*]], ptr nocapture nofree noundef nonnull writeonly dereferenceable(1) [[WPTR:%.*]]) #[[ATTR17:[0-9]+]] {
; CGSCC-NEXT:    store i8 0, ptr [[WPTR]], align 1
; CGSCC-NEXT:    ret void
;
  %call_ptr = call ptr @maybe_returned_ptr(ptr %ptr)
  %call_val = call i8 @maybe_returned_val(ptr %call_ptr)
  call void @val_use(i8 %call_val)
  store i8 0, ptr %wptr
  ret void
}

declare ptr @llvm.launder.invariant.group.p0(ptr)
declare ptr @llvm.strip.invariant.group.p0(ptr)
;.
; TUNIT: attributes #[[ATTR0]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR1]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(write) }
; TUNIT: attributes #[[ATTR2]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(read) }
; TUNIT: attributes #[[ATTR3:[0-9]+]] = { memory(read) }
; TUNIT: attributes #[[ATTR4]] = { nosync memory(read) }
; TUNIT: attributes #[[ATTR5]] = { mustprogress nofree norecurse nosync nounwind willreturn }
; TUNIT: attributes #[[ATTR6]] = { nounwind memory(argmem: readwrite) }
; TUNIT: attributes #[[ATTR7]] = { nofree nosync nounwind memory(write) }
; TUNIT: attributes #[[ATTR8]] = { mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite) }
; TUNIT: attributes #[[ATTR9]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) }
; TUNIT: attributes #[[ATTR10]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; TUNIT: attributes #[[ATTR11]] = { mustprogress nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; TUNIT: attributes #[[ATTR12]] = { nosync nounwind memory(read) }
; TUNIT: attributes #[[ATTR13:[0-9]+]] = { nounwind willreturn memory(read) }
; TUNIT: attributes #[[ATTR14]] = { mustprogress nosync nounwind willreturn }
; TUNIT: attributes #[[ATTR15:[0-9]+]] = { nocallback nofree nosync nounwind speculatable willreturn memory(inaccessiblemem: readwrite) }
; TUNIT: attributes #[[ATTR16:[0-9]+]] = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
; TUNIT: attributes #[[ATTR17]] = { nofree nosync nounwind willreturn memory(write) }
; TUNIT: attributes #[[ATTR18]] = { nofree nosync nounwind willreturn memory(none) }
; TUNIT: attributes #[[ATTR19]] = { nofree nosync nounwind willreturn }
; TUNIT: attributes #[[ATTR20]] = { nounwind }
; TUNIT: attributes #[[ATTR21]] = { nofree willreturn }
; TUNIT: attributes #[[ATTR22]] = { nofree nosync willreturn }
;.
; CGSCC: attributes #[[ATTR0]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) }
; CGSCC: attributes #[[ATTR1]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(write) }
; CGSCC: attributes #[[ATTR2]] = { mustprogress nofree nosync nounwind willreturn memory(write) }
; CGSCC: attributes #[[ATTR3]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(read) }
; CGSCC: attributes #[[ATTR4:[0-9]+]] = { memory(read) }
; CGSCC: attributes #[[ATTR5]] = { nosync memory(read) }
; CGSCC: attributes #[[ATTR6]] = { mustprogress nofree nosync nounwind willreturn memory(read) }
; CGSCC: attributes #[[ATTR7]] = { mustprogress nofree norecurse nosync nounwind willreturn }
; CGSCC: attributes #[[ATTR8]] = { mustprogress nofree nosync nounwind willreturn }
; CGSCC: attributes #[[ATTR9]] = { nounwind memory(argmem: readwrite) }
; CGSCC: attributes #[[ATTR10]] = { nofree nosync nounwind memory(write) }
; CGSCC: attributes #[[ATTR11]] = { mustprogress nofree norecurse nounwind willreturn memory(argmem: readwrite) }
; CGSCC: attributes #[[ATTR12]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite, inaccessiblemem: readwrite) }
; CGSCC: attributes #[[ATTR13]] = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) }
; CGSCC: attributes #[[ATTR14]] = { mustprogress nofree norecurse nosync nounwind null_pointer_is_valid willreturn memory(none) }
; CGSCC: attributes #[[ATTR15]] = { nosync nounwind memory(read) }
; CGSCC: attributes #[[ATTR16:[0-9]+]] = { nounwind willreturn memory(read) }
; CGSCC: attributes #[[ATTR17]] = { mustprogress nosync nounwind willreturn }
; CGSCC: attributes #[[ATTR18:[0-9]+]] = { nocallback nofree nosync nounwind speculatable willreturn memory(inaccessiblemem: readwrite) }
; CGSCC: attributes #[[ATTR19:[0-9]+]] = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
; CGSCC: attributes #[[ATTR20]] = { nofree nounwind willreturn memory(write) }
; CGSCC: attributes #[[ATTR21]] = { nofree nosync willreturn }
; CGSCC: attributes #[[ATTR22]] = { nofree nounwind willreturn }
; CGSCC: attributes #[[ATTR23]] = { nounwind }
; CGSCC: attributes #[[ATTR24]] = { nofree willreturn }
;.