llvm/test/Transforms/FunctionAttrs/argmemonly.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --check-attributes --version 2
; RUN: opt -passes=function-attrs -S < %s | FileCheck --check-prefixes=COMMON,FNATTRS %s
; RUN: opt -passes=attributor-light -S < %s | FileCheck --check-prefixes=COMMON,ATTRIBUTOR %s

@g = global i32 20

define void @test_no_read_or_write() {
; COMMON: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; COMMON-LABEL: define void @test_no_read_or_write
; COMMON-SAME: () #[[ATTR0:[0-9]+]] {
; COMMON-NEXT:  entry:
; COMMON-NEXT:    ret void
;
entry:
  ret void
}

define i32 @test_only_read_arg(ptr %ptr) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i32 @test_only_read_arg
; FNATTRS-SAME: (ptr nocapture readonly [[PTR:%.*]]) #[[ATTR1:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; FNATTRS-NEXT:    ret i32 [[L]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; ATTRIBUTOR-LABEL: define i32 @test_only_read_arg
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[PTR:%.*]]) #[[ATTR1:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; ATTRIBUTOR-NEXT:    ret i32 [[L]]
;
entry:
  %l = load i32, ptr %ptr
  ret i32 %l
}

define i32 @test_only_read_arg_already_has_argmemonly(ptr %ptr) argmemonly {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i32 @test_only_read_arg_already_has_argmemonly
; FNATTRS-SAME: (ptr nocapture readonly [[PTR:%.*]]) #[[ATTR1]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; FNATTRS-NEXT:    ret i32 [[L]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; ATTRIBUTOR-LABEL: define i32 @test_only_read_arg_already_has_argmemonly
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[PTR:%.*]]) #[[ATTR1]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; ATTRIBUTOR-NEXT:    ret i32 [[L]]
;
entry:
  %l = load i32, ptr %ptr
  ret i32 %l
}

define i32 @test_read_global() {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none)
; FNATTRS-LABEL: define i32 @test_read_global
; FNATTRS-SAME: () #[[ATTR2:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[L:%.*]] = load i32, ptr @g, align 4
; FNATTRS-NEXT:    ret i32 [[L]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read)
; ATTRIBUTOR-LABEL: define i32 @test_read_global
; ATTRIBUTOR-SAME: () #[[ATTR2:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[L:%.*]] = load i32, ptr @g, align 4
; ATTRIBUTOR-NEXT:    ret i32 [[L]]
;
entry:
  %l = load i32, ptr @g
  ret i32 %l
}

define i32 @test_read_loaded_ptr(ptr %ptr) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define i32 @test_read_loaded_ptr
; FNATTRS-SAME: (ptr nocapture readonly [[PTR:%.*]]) #[[ATTR3:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[L:%.*]] = load ptr, ptr [[PTR]], align 8
; FNATTRS-NEXT:    [[L_2:%.*]] = load i32, ptr [[L]], align 4
; FNATTRS-NEXT:    ret i32 [[L_2]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read)
; ATTRIBUTOR-LABEL: define i32 @test_read_loaded_ptr
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[PTR:%.*]]) #[[ATTR2]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[L:%.*]] = load ptr, ptr [[PTR]], align 8
; ATTRIBUTOR-NEXT:    [[L_2:%.*]] = load i32, ptr [[L]], align 4
; ATTRIBUTOR-NEXT:    ret i32 [[L_2]]
;
entry:
  %l = load ptr, ptr %ptr
  %l.2 = load i32, ptr %l
  ret i32 %l.2
}

define void @test_only_write_arg(ptr %ptr) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write)
; FNATTRS-LABEL: define void @test_only_write_arg
; FNATTRS-SAME: (ptr nocapture writeonly initializes((0, 4)) [[PTR:%.*]]) #[[ATTR4:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    store i32 0, ptr [[PTR]], align 4
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write)
; ATTRIBUTOR-LABEL: define void @test_only_write_arg
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull writeonly [[PTR:%.*]]) #[[ATTR3:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    store i32 0, ptr [[PTR]], align 4
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  store i32 0, ptr %ptr
  ret void
}

define void @test_write_global() {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_write_global
; FNATTRS-SAME: () #[[ATTR5:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    store i32 0, ptr @g, align 4
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write)
; ATTRIBUTOR-LABEL: define void @test_write_global
; ATTRIBUTOR-SAME: () #[[ATTR4:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    store i32 0, ptr @g, align 4
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  store i32 0, ptr @g
  ret void
}

declare void @fn_may_access_memory()

define void @test_call_may_access_memory() {
; COMMON-LABEL: define void @test_call_may_access_memory() {
; COMMON-NEXT:  entry:
; COMMON-NEXT:    call void @fn_may_access_memory()
; COMMON-NEXT:    ret void
;
entry:
  call void @fn_may_access_memory()
  ret void
}

declare i32 @fn_readnone() readnone

define void @test_call_readnone(ptr %ptr) {
; FNATTRS: Function Attrs: memory(argmem: write)
; FNATTRS-LABEL: define void @test_call_readnone
; FNATTRS-SAME: (ptr nocapture writeonly initializes((0, 4)) [[PTR:%.*]]) #[[ATTR7:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[C:%.*]] = call i32 @fn_readnone()
; FNATTRS-NEXT:    store i32 [[C]], ptr [[PTR]], align 4
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nosync memory(argmem: write)
; ATTRIBUTOR-LABEL: define void @test_call_readnone
; ATTRIBUTOR-SAME: (ptr nocapture nofree writeonly [[PTR:%.*]]) #[[ATTR6:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[C:%.*]] = call i32 @fn_readnone() #[[ATTR18:[0-9]+]]
; ATTRIBUTOR-NEXT:    store i32 [[C]], ptr [[PTR]], align 4
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  %c = call i32 @fn_readnone()
  store i32 %c, ptr %ptr
  ret void
}

declare i32 @fn_argmemonly(ptr) argmemonly

define i32 @test_call_argmemonly(ptr %ptr) {
; FNATTRS: Function Attrs: memory(argmem: readwrite)
; FNATTRS-LABEL: define i32 @test_call_argmemonly
; FNATTRS-SAME: (ptr [[PTR:%.*]]) #[[ATTR8:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[C:%.*]] = call i32 @fn_argmemonly(ptr [[PTR]])
; FNATTRS-NEXT:    ret i32 [[C]]
;
; ATTRIBUTOR: Function Attrs: memory(argmem: readwrite)
; ATTRIBUTOR-LABEL: define i32 @test_call_argmemonly
; ATTRIBUTOR-SAME: (ptr [[PTR:%.*]]) #[[ATTR7:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[C:%.*]] = call i32 @fn_argmemonly(ptr [[PTR]])
; ATTRIBUTOR-NEXT:    ret i32 [[C]]
;
entry:
  %c = call i32 @fn_argmemonly(ptr %ptr)
  ret i32 %c
}

define i32 @test_call_fn_where_argmemonly_can_be_inferred(ptr %ptr) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i32 @test_call_fn_where_argmemonly_can_be_inferred
; FNATTRS-SAME: (ptr nocapture readonly [[PTR:%.*]]) #[[ATTR1]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[C:%.*]] = call i32 @test_only_read_arg(ptr [[PTR]])
; FNATTRS-NEXT:    ret i32 [[C]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; ATTRIBUTOR-LABEL: define i32 @test_call_fn_where_argmemonly_can_be_inferred
; ATTRIBUTOR-SAME: (ptr nocapture nofree readonly [[PTR:%.*]]) #[[ATTR1]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[C:%.*]] = call i32 @test_only_read_arg(ptr nocapture nofree readonly [[PTR]]) #[[ATTR19:[0-9]+]]
; ATTRIBUTOR-NEXT:    ret i32 [[C]]
;
entry:
  %c = call i32 @test_only_read_arg(ptr %ptr)
  ret i32 %c
}

define void @test_memcpy_argonly(ptr %dst, ptr %src) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite)
; FNATTRS-LABEL: define void @test_memcpy_argonly
; FNATTRS-SAME: (ptr nocapture writeonly initializes((0, 32)) [[DST:%.*]], ptr nocapture readonly [[SRC:%.*]]) #[[ATTR9:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr [[DST]], ptr [[SRC]], i64 32, i1 false)
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite)
; ATTRIBUTOR-LABEL: define void @test_memcpy_argonly
; ATTRIBUTOR-SAME: (ptr nocapture nofree writeonly [[DST:%.*]], ptr nocapture nofree readonly [[SRC:%.*]]) #[[ATTR8:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly [[DST]], ptr nocapture readonly [[SRC]], i64 32, i1 false) #[[ATTR20:[0-9]+]]
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr %src, i64 32, i1 false)
  ret void
}

declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)

@arr = global [32 x i8] zeroinitializer

define void @test_memcpy_src_global(ptr %dst) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_memcpy_src_global
; FNATTRS-SAME: (ptr nocapture writeonly initializes((0, 32)) [[DST:%.*]]) #[[ATTR11:[0-9]+]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr [[DST]], ptr @arr, i64 32, i1 false)
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; ATTRIBUTOR-LABEL: define void @test_memcpy_src_global
; ATTRIBUTOR-SAME: (ptr nocapture nofree writeonly [[DST:%.*]]) #[[ATTR10:[0-9]+]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr nocapture writeonly [[DST]], ptr readonly @arr, i64 32, i1 false) #[[ATTR20]]
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  call void @llvm.memcpy.p0.p0.i64(ptr %dst, ptr @arr, i64 32, i1 false)
  ret void
}

define void @test_memcpy_dst_global(ptr %src) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_memcpy_dst_global
; FNATTRS-SAME: (ptr nocapture readonly [[SRC:%.*]]) #[[ATTR11]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr @arr, ptr [[SRC]], i64 32, i1 false)
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn
; ATTRIBUTOR-LABEL: define void @test_memcpy_dst_global
; ATTRIBUTOR-SAME: (ptr nocapture nofree readonly [[SRC:%.*]]) #[[ATTR10]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    call void @llvm.memcpy.p0.p0.i64(ptr writeonly @arr, ptr nocapture readonly [[SRC]], i64 32, i1 false) #[[ATTR20]]
; ATTRIBUTOR-NEXT:    ret void
;
entry:
  call void @llvm.memcpy.p0.p0.i64(ptr @arr, ptr %src, i64 32, i1 false)
  ret void
}

define i32 @test_read_arg_access_alloca(ptr %ptr) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i32 @test_read_arg_access_alloca
; FNATTRS-SAME: (ptr nocapture readonly [[PTR:%.*]]) #[[ATTR1]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[A:%.*]] = alloca i32, align 4
; FNATTRS-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; FNATTRS-NEXT:    store i32 [[L]], ptr [[A]], align 4
; FNATTRS-NEXT:    [[L_2:%.*]] = load i32, ptr [[A]], align 4
; FNATTRS-NEXT:    ret i32 [[L_2]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite)
; ATTRIBUTOR-LABEL: define i32 @test_read_arg_access_alloca
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[PTR:%.*]]) #[[ATTR8]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[A:%.*]] = alloca i32, align 4
; ATTRIBUTOR-NEXT:    [[L:%.*]] = load i32, ptr [[PTR]], align 4
; ATTRIBUTOR-NEXT:    store i32 [[L]], ptr [[A]], align 4
; ATTRIBUTOR-NEXT:    [[L_2:%.*]] = load i32, ptr [[A]], align 4
; ATTRIBUTOR-NEXT:    ret i32 [[L_2]]
;
entry:
  %a = alloca i32
  %l = load i32, ptr %ptr
  store i32 %l, ptr %a
  %l.2 = load i32, ptr %a
  ret i32 %l.2
}

declare void @fn_inaccessiblememonly() inaccessiblememonly

define void @test_inaccessiblememonly() {
; FNATTRS: Function Attrs: memory(inaccessiblemem: readwrite)
; FNATTRS-LABEL: define void @test_inaccessiblememonly
; FNATTRS-SAME: () #[[ATTR12:[0-9]+]] {
; FNATTRS-NEXT:    call void @fn_inaccessiblememonly()
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: memory(inaccessiblemem: readwrite)
; ATTRIBUTOR-LABEL: define void @test_inaccessiblememonly
; ATTRIBUTOR-SAME: () #[[ATTR11:[0-9]+]] {
; ATTRIBUTOR-NEXT:    call void @fn_inaccessiblememonly()
; ATTRIBUTOR-NEXT:    ret void
;
  call void @fn_inaccessiblememonly()
  ret void
}

define void @test_inaccessiblememonly_readonly() {
; FNATTRS: Function Attrs: nofree memory(inaccessiblemem: read)
; FNATTRS-LABEL: define void @test_inaccessiblememonly_readonly
; FNATTRS-SAME: () #[[ATTR13:[0-9]+]] {
; FNATTRS-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR19:[0-9]+]]
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nosync memory(inaccessiblemem: read)
; ATTRIBUTOR-LABEL: define void @test_inaccessiblememonly_readonly
; ATTRIBUTOR-SAME: () #[[ATTR12:[0-9]+]] {
; ATTRIBUTOR-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR21:[0-9]+]]
; ATTRIBUTOR-NEXT:    ret void
;
  call void @fn_inaccessiblememonly() readonly
  ret void
}

define void @test_inaccessibleorargmemonly_readonly(ptr %arg) {
; FNATTRS: Function Attrs: nofree memory(argmem: read, inaccessiblemem: read)
; FNATTRS-LABEL: define void @test_inaccessibleorargmemonly_readonly
; FNATTRS-SAME: (ptr nocapture readonly [[ARG:%.*]]) #[[ATTR14:[0-9]+]] {
; FNATTRS-NEXT:    [[TMP1:%.*]] = load i32, ptr [[ARG]], align 4
; FNATTRS-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR19]]
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nosync memory(argmem: read, inaccessiblemem: read)
; ATTRIBUTOR-LABEL: define void @test_inaccessibleorargmemonly_readonly
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[ARG:%.*]]) #[[ATTR13:[0-9]+]] {
; ATTRIBUTOR-NEXT:    [[TMP1:%.*]] = load i32, ptr [[ARG]], align 4
; ATTRIBUTOR-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR21]]
; ATTRIBUTOR-NEXT:    ret void
;
  load i32, ptr %arg
  call void @fn_inaccessiblememonly() readonly
  ret void
}

define void @test_inaccessibleorargmemonly_readwrite(ptr %arg) {
; FNATTRS: Function Attrs: memory(argmem: write, inaccessiblemem: read)
; FNATTRS-LABEL: define void @test_inaccessibleorargmemonly_readwrite
; FNATTRS-SAME: (ptr nocapture writeonly initializes((0, 4)) [[ARG:%.*]]) #[[ATTR15:[0-9]+]] {
; FNATTRS-NEXT:    store i32 0, ptr [[ARG]], align 4
; FNATTRS-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR19]]
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nosync memory(argmem: readwrite, inaccessiblemem: readwrite)
; ATTRIBUTOR-LABEL: define void @test_inaccessibleorargmemonly_readwrite
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull writeonly [[ARG:%.*]]) #[[ATTR14:[0-9]+]] {
; ATTRIBUTOR-NEXT:    store i32 0, ptr [[ARG]], align 4
; ATTRIBUTOR-NEXT:    call void @fn_inaccessiblememonly() #[[ATTR21]]
; ATTRIBUTOR-NEXT:    ret void
;
  store i32 0, ptr %arg
  call void @fn_inaccessiblememonly() readonly
  ret void
}

define void @test_recursive_argmem_read(ptr %p) {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_recursive_argmem_read
; FNATTRS-SAME: (ptr nocapture readonly [[P:%.*]]) #[[ATTR16:[0-9]+]] {
; FNATTRS-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; FNATTRS-NEXT:    call void @test_recursive_argmem_read(ptr [[PVAL]])
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(read)
; ATTRIBUTOR-LABEL: define void @test_recursive_argmem_read
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[P:%.*]]) #[[ATTR15:[0-9]+]] {
; ATTRIBUTOR-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; ATTRIBUTOR-NEXT:    call void @test_recursive_argmem_read(ptr nocapture nofree readonly [[PVAL]]) #[[ATTR15]]
; ATTRIBUTOR-NEXT:    ret void
;
  %pval = load ptr, ptr %p
  call void @test_recursive_argmem_read(ptr %pval)
  ret void
}

define void @test_recursive_argmem_readwrite(ptr %p) {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(readwrite, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_recursive_argmem_readwrite
; FNATTRS-SAME: (ptr nocapture [[P:%.*]]) #[[ATTR17:[0-9]+]] {
; FNATTRS-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; FNATTRS-NEXT:    store i32 0, ptr [[P]], align 4
; FNATTRS-NEXT:    call void @test_recursive_argmem_readwrite(ptr [[PVAL]])
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind
; ATTRIBUTOR-LABEL: define void @test_recursive_argmem_readwrite
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull [[P:%.*]]) #[[ATTR16:[0-9]+]] {
; ATTRIBUTOR-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; ATTRIBUTOR-NEXT:    store i32 0, ptr [[P]], align 4
; ATTRIBUTOR-NEXT:    call void @test_recursive_argmem_readwrite(ptr nocapture nofree [[PVAL]]) #[[ATTR16]]
; ATTRIBUTOR-NEXT:    ret void
;
  %pval = load ptr, ptr %p
  store i32 0, ptr %p
  call void @test_recursive_argmem_readwrite(ptr %pval)
  ret void
}

define void @test_recursive_argmem_read_alloca(ptr %p) {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(argmem: read)
; FNATTRS-LABEL: define void @test_recursive_argmem_read_alloca
; FNATTRS-SAME: (ptr nocapture readonly [[P:%.*]]) #[[ATTR18:[0-9]+]] {
; FNATTRS-NEXT:    [[A:%.*]] = alloca ptr, align 8
; FNATTRS-NEXT:    [[TMP1:%.*]] = load i32, ptr [[P]], align 4
; FNATTRS-NEXT:    call void @test_recursive_argmem_read_alloca(ptr [[A]])
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(argmem: read)
; ATTRIBUTOR-LABEL: define void @test_recursive_argmem_read_alloca
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[P:%.*]]) #[[ATTR17:[0-9]+]] {
; ATTRIBUTOR-NEXT:    [[A:%.*]] = alloca ptr, align 8
; ATTRIBUTOR-NEXT:    [[TMP1:%.*]] = load i32, ptr [[P]], align 4
; ATTRIBUTOR-NEXT:    call void @test_recursive_argmem_read_alloca(ptr nocapture nofree nonnull readonly [[A]]) #[[ATTR15]]
; ATTRIBUTOR-NEXT:    ret void
;
  %a = alloca ptr
  load i32, ptr %p
  call void @test_recursive_argmem_read_alloca(ptr %a)
  ret void
}

define void @test_scc_argmem_read_1(ptr %p) {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_scc_argmem_read_1
; FNATTRS-SAME: (ptr nocapture readonly [[P:%.*]]) #[[ATTR16]] {
; FNATTRS-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; FNATTRS-NEXT:    call void @test_scc_argmem_read_2(ptr [[PVAL]])
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(read)
; ATTRIBUTOR-LABEL: define void @test_scc_argmem_read_1
; ATTRIBUTOR-SAME: (ptr nocapture nofree nonnull readonly [[P:%.*]]) #[[ATTR15]] {
; ATTRIBUTOR-NEXT:    [[PVAL:%.*]] = load ptr, ptr [[P]], align 8
; ATTRIBUTOR-NEXT:    call void @test_scc_argmem_read_2(ptr nocapture nofree readonly [[PVAL]]) #[[ATTR15]]
; ATTRIBUTOR-NEXT:    ret void
;
  %pval = load ptr, ptr %p
  call void @test_scc_argmem_read_2(ptr %pval)
  ret void
}

define void @test_scc_argmem_read_2(ptr %p) {
; FNATTRS: Function Attrs: nofree nosync nounwind memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define void @test_scc_argmem_read_2
; FNATTRS-SAME: (ptr nocapture readonly [[P:%.*]]) #[[ATTR16]] {
; FNATTRS-NEXT:    call void @test_scc_argmem_read_1(ptr [[P]])
; FNATTRS-NEXT:    ret void
;
; ATTRIBUTOR: Function Attrs: nofree nosync nounwind memory(read)
; ATTRIBUTOR-LABEL: define void @test_scc_argmem_read_2
; ATTRIBUTOR-SAME: (ptr nocapture nofree readonly [[P:%.*]]) #[[ATTR15]] {
; ATTRIBUTOR-NEXT:    call void @test_scc_argmem_read_1(ptr nocapture nofree readonly [[P]]) #[[ATTR15]]
; ATTRIBUTOR-NEXT:    ret void
;
  call void @test_scc_argmem_read_1(ptr %p)
  ret void
}

define i64 @select_same_obj(i1 %c, ptr %p, i64 %x) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i64 @select_same_obj
; FNATTRS-SAME: (i1 [[C:%.*]], ptr nocapture readonly [[P:%.*]], i64 [[X:%.*]]) #[[ATTR1]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[P2:%.*]] = getelementptr i8, ptr [[P]], i64 [[X]]
; FNATTRS-NEXT:    [[P3:%.*]] = select i1 [[C]], ptr [[P]], ptr [[P2]]
; FNATTRS-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; FNATTRS-NEXT:    ret i64 [[R]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; ATTRIBUTOR-LABEL: define i64 @select_same_obj
; ATTRIBUTOR-SAME: (i1 [[C:%.*]], ptr nocapture nofree readonly [[P:%.*]], i64 [[X:%.*]]) #[[ATTR0]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[P2:%.*]] = getelementptr i8, ptr [[P]], i64 [[X]]
; ATTRIBUTOR-NEXT:    [[P3:%.*]] = select i1 [[C]], ptr [[P]], ptr [[P2]]
; ATTRIBUTOR-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; ATTRIBUTOR-NEXT:    ret i64 [[R]]
;
entry:
  %p2 = getelementptr i8, ptr %p, i64 %x
  %p3 = select i1 %c, ptr %p, ptr %p2
  %r = load i64, ptr %p3
  ret i64 %r
}

; FIXME: This could be `memory(argmem: read)`.
define i64 @select_different_obj(i1 %c, ptr %p, ptr %p2) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define i64 @select_different_obj
; FNATTRS-SAME: (i1 [[C:%.*]], ptr nocapture readonly [[P:%.*]], ptr nocapture readonly [[P2:%.*]]) #[[ATTR3]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[P3:%.*]] = select i1 [[C]], ptr [[P]], ptr [[P2]]
; FNATTRS-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; FNATTRS-NEXT:    ret i64 [[R]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; ATTRIBUTOR-LABEL: define i64 @select_different_obj
; ATTRIBUTOR-SAME: (i1 [[C:%.*]], ptr nocapture nofree readonly [[P:%.*]], ptr nocapture nofree readonly [[P2:%.*]]) #[[ATTR0]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[P3:%.*]] = select i1 [[C]], ptr [[P]], ptr [[P2]]
; ATTRIBUTOR-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; ATTRIBUTOR-NEXT:    ret i64 [[R]]
;
entry:
  %p3 = select i1 %c, ptr %p, ptr %p2
  %r = load i64, ptr %p3
  ret i64 %r
}

define i64 @phi_same_obj(i1 %c, ptr %p, i64 %x) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; FNATTRS-LABEL: define i64 @phi_same_obj
; FNATTRS-SAME: (i1 [[C:%.*]], ptr nocapture readonly [[P:%.*]], i64 [[X:%.*]]) #[[ATTR1]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    [[P2:%.*]] = getelementptr i8, ptr [[P]], i64 [[X]]
; FNATTRS-NEXT:    br i1 [[C]], label [[IF:%.*]], label [[JOIN:%.*]]
; FNATTRS:       if:
; FNATTRS-NEXT:    br label [[JOIN]]
; FNATTRS:       join:
; FNATTRS-NEXT:    [[P3:%.*]] = phi ptr [ [[P]], [[IF]] ], [ [[P2]], [[ENTRY:%.*]] ]
; FNATTRS-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; FNATTRS-NEXT:    ret i64 [[R]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; ATTRIBUTOR-LABEL: define i64 @phi_same_obj
; ATTRIBUTOR-SAME: (i1 [[C:%.*]], ptr nocapture nofree readonly [[P:%.*]], i64 [[X:%.*]]) #[[ATTR1]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    [[P2:%.*]] = getelementptr i8, ptr [[P]], i64 [[X]]
; ATTRIBUTOR-NEXT:    br i1 [[C]], label [[IF:%.*]], label [[JOIN:%.*]]
; ATTRIBUTOR:       if:
; ATTRIBUTOR-NEXT:    br label [[JOIN]]
; ATTRIBUTOR:       join:
; ATTRIBUTOR-NEXT:    [[P3:%.*]] = phi ptr [ [[P]], [[IF]] ], [ [[P2]], [[ENTRY:%.*]] ]
; ATTRIBUTOR-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; ATTRIBUTOR-NEXT:    ret i64 [[R]]
;
entry:
  %p2 = getelementptr i8, ptr %p, i64 %x
  br i1 %c, label %if, label %join
if:
  br label %join
join:
  %p3 = phi ptr [ %p, %if ], [ %p2, %entry ]
  %r = load i64, ptr %p3
  ret i64 %r
}

; FIXME: This could be `memory(argmem: read)`.
define i64 @phi_different_obj(i1 %c, ptr %p, ptr %p2) {
; FNATTRS: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none)
; FNATTRS-LABEL: define i64 @phi_different_obj
; FNATTRS-SAME: (i1 [[C:%.*]], ptr nocapture readonly [[P:%.*]], ptr nocapture readonly [[P2:%.*]]) #[[ATTR3]] {
; FNATTRS-NEXT:  entry:
; FNATTRS-NEXT:    br i1 [[C]], label [[IF:%.*]], label [[JOIN:%.*]]
; FNATTRS:       if:
; FNATTRS-NEXT:    br label [[JOIN]]
; FNATTRS:       join:
; FNATTRS-NEXT:    [[P3:%.*]] = phi ptr [ [[P]], [[IF]] ], [ [[P2]], [[ENTRY:%.*]] ]
; FNATTRS-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; FNATTRS-NEXT:    ret i64 [[R]]
;
; ATTRIBUTOR: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read)
; ATTRIBUTOR-LABEL: define i64 @phi_different_obj
; ATTRIBUTOR-SAME: (i1 [[C:%.*]], ptr nocapture nofree readonly [[P:%.*]], ptr nocapture nofree readonly [[P2:%.*]]) #[[ATTR1]] {
; ATTRIBUTOR-NEXT:  entry:
; ATTRIBUTOR-NEXT:    br i1 [[C]], label [[IF:%.*]], label [[JOIN:%.*]]
; ATTRIBUTOR:       if:
; ATTRIBUTOR-NEXT:    br label [[JOIN]]
; ATTRIBUTOR:       join:
; ATTRIBUTOR-NEXT:    [[P3:%.*]] = phi ptr [ [[P]], [[IF]] ], [ [[P2]], [[ENTRY:%.*]] ]
; ATTRIBUTOR-NEXT:    [[R:%.*]] = load i64, ptr [[P3]], align 4
; ATTRIBUTOR-NEXT:    ret i64 [[R]]
;
entry:
  br i1 %c, label %if, label %join
if:
  br label %join
join:
  %p3 = phi ptr [ %p, %if ], [ %p2, %entry ]
  %r = load i64, ptr %p3
  ret i64 %r
}

; An `alloca` that won't be handled by `getModRefInfoMask`
define i64 @alloca_with_phis(i64 %arg, i1 %cmp) {
; COMMON: Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none)
; COMMON-LABEL: define i64 @alloca_with_phis
; COMMON-SAME: (i64 [[ARG:%.*]], i1 [[CMP:%.*]]) #[[ATTR0]] {
; COMMON-NEXT:  bb:
; COMMON-NEXT:    [[I:%.*]] = alloca i64, align 8
; COMMON-NEXT:    store i64 [[ARG]], ptr [[I]], align 4
; COMMON-NEXT:    br i1 [[CMP]], label [[BB1:%.*]], label [[BB4:%.*]]
; COMMON:       bb1:
; COMMON-NEXT:    br i1 [[CMP]], label [[BB8:%.*]], label [[BB2:%.*]]
; COMMON:       bb2:
; COMMON-NEXT:    br i1 [[CMP]], label [[BB8]], label [[BB3:%.*]]
; COMMON:       bb3:
; COMMON-NEXT:    br i1 [[CMP]], label [[BB8]], label [[BB6:%.*]]
; COMMON:       bb4:
; COMMON-NEXT:    br i1 [[CMP]], label [[BB8]], label [[BB5:%.*]]
; COMMON:       bb5:
; COMMON-NEXT:    br i1 [[CMP]], label [[BB8]], label [[BB6]]
; COMMON:       bb6:
; COMMON-NEXT:    [[I7:%.*]] = phi ptr [ [[I]], [[BB3]] ], [ [[I]], [[BB5]] ]
; COMMON-NEXT:    br label [[BB8]]
; COMMON:       bb8:
; COMMON-NEXT:    [[I9:%.*]] = phi ptr [ [[I]], [[BB1]] ], [ [[I]], [[BB2]] ], [ [[I]], [[BB3]] ], [ [[I]], [[BB4]] ], [ [[I]], [[BB5]] ], [ [[I7]], [[BB6]] ]
; COMMON-NEXT:    [[RET:%.*]] = load i64, ptr [[I9]], align 4
; COMMON-NEXT:    ret i64 [[RET]]
;
bb:
  %i = alloca i64
  store i64 %arg, ptr %i
  br i1 %cmp, label %bb1, label %bb4

bb1:                                              ; preds = %bb
  br i1 %cmp, label %bb8, label %bb2

bb2:                                              ; preds = %bb1
  br i1 %cmp, label %bb8, label %bb3

bb3:                                              ; preds = %bb2
  br i1 %cmp, label %bb8, label %bb6

bb4:                                              ; preds = %bb
  br i1 %cmp, label %bb8, label %bb5

bb5:                                              ; preds = %bb4
  br i1 %cmp, label %bb8, label %bb6

bb6:                                              ; preds = %bb5, %bb3
  %i7 = phi ptr [ %i, %bb3 ], [ %i, %bb5 ]
  br label %bb8

bb8:                                              ; preds = %bb6, %bb5, %bb4, %bb3, %bb2, %bb1
  %i9 = phi ptr [ %i, %bb1 ], [ %i, %bb2 ], [ %i, %bb3 ], [ %i, %bb4 ], [ %i, %bb5 ], [ %i7, %bb6 ]
  %ret = load i64, ptr %i9
  ret i64 %ret
}