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clang-p2996/llvm/test/Transforms/Attributor/heap_to_stack.ll
Johannes Doerfert 5602c866c0 [Attributor] Look through allocated heap memory 
AAPointerInfo, and thereby other places, can look already through
internal global and stack memory. This patch enables them to look
through heap memory returned by functions with a `noalias` return.

In the future we can look through `noalias` arguments as well but that
will require AAIsDead to learn that such memory can be inspected by the
caller later on. We also need teach AAPointerInfo about dominance to
actually deal with memory that might not be `null` or `undef`
initialized. D106397 is a first step in that direction already.

Reviewed By: kuter

Differential Revision: https://reviews.llvm.org/D109170
2021-12-29 00:21:36 -06:00

848 lines
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --check-attributes --check-globals
; RUN: opt -attributor -enable-new-pm=0 -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=9 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_NPM,NOT_CGSCC_OPM,NOT_TUNIT_NPM,IS__TUNIT____,IS________OPM,IS__TUNIT_OPM
; RUN: opt -aa-pipeline=basic-aa -passes=attributor -attributor-manifest-internal -attributor-max-iterations-verify -attributor-annotate-decl-cs -attributor-max-iterations=14 -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_CGSCC_OPM,NOT_CGSCC_NPM,NOT_TUNIT_OPM,IS__TUNIT____,IS________NPM,IS__TUNIT_NPM
; RUN: opt -attributor-cgscc -enable-new-pm=0 -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_NPM,IS__CGSCC____,IS________OPM,IS__CGSCC_OPM
; RUN: opt -aa-pipeline=basic-aa -passes=attributor-cgscc -attributor-manifest-internal -attributor-annotate-decl-cs -S < %s | FileCheck %s --check-prefixes=CHECK,NOT_TUNIT_NPM,NOT_TUNIT_OPM,NOT_CGSCC_OPM,IS__CGSCC____,IS________NPM,IS__CGSCC_NPM
declare noalias i8* @malloc(i64)
declare void @nocapture_func_frees_pointer(i8* nocapture)
declare void @func_throws(...)
declare void @sync_func(i8* %p)
declare void @sync_will_return(i8* %p) willreturn nounwind
declare void @no_sync_func(i8* nocapture %p) nofree nosync willreturn
declare void @nofree_func(i8* nocapture %p) nofree nosync willreturn
declare void @foo(i32* %p)
declare void @foo_nounw(i32* %p) nounwind nofree
declare void @usei8(i8)
declare i32 @no_return_call() noreturn
declare void @free(i8* nocapture)
declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) nounwind
define void @h2s_value_simplify_interaction(i1 %c, i8* %A) {
; IS________OPM-LABEL: define {{[^@]+}}@h2s_value_simplify_interaction
; IS________OPM-SAME: (i1 [[C:%.*]], i8* nocapture nofree readnone [[A:%.*]]) {
; IS________OPM-NEXT: entry:
; IS________OPM-NEXT: [[M:%.*]] = tail call noalias align 16 i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; IS________OPM: t:
; IS________OPM-NEXT: br i1 false, label [[DEAD:%.*]], label [[F2:%.*]]
; IS________OPM: f:
; IS________OPM-NEXT: br label [[J:%.*]]
; IS________OPM: f2:
; IS________OPM-NEXT: [[C1:%.*]] = bitcast i8* [[M]] to i32*
; IS________OPM-NEXT: [[C2:%.*]] = bitcast i32* [[C1]] to i8*
; IS________OPM-NEXT: [[L:%.*]] = load i8, i8* [[C2]], align 16
; IS________OPM-NEXT: call void @usei8(i8 [[L]])
; IS________OPM-NEXT: call void @no_sync_func(i8* nocapture nofree noundef align 16 [[C2]]) #[[ATTR5:[0-9]+]]
; IS________OPM-NEXT: br label [[J]]
; IS________OPM: dead:
; IS________OPM-NEXT: unreachable
; IS________OPM: j:
; IS________OPM-NEXT: [[PHI:%.*]] = phi i8* [ [[M]], [[F]] ], [ null, [[F2]] ]
; IS________OPM-NEXT: tail call void @no_sync_func(i8* nocapture nofree noundef align 16 [[PHI]]) #[[ATTR5]]
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@h2s_value_simplify_interaction
; IS________NPM-SAME: (i1 [[C:%.*]], i8* nocapture nofree readnone [[A:%.*]]) {
; IS________NPM-NEXT: entry:
; IS________NPM-NEXT: [[TMP0:%.*]] = alloca i8, i64 4, align 16
; IS________NPM-NEXT: br i1 [[C]], label [[T:%.*]], label [[F:%.*]]
; IS________NPM: t:
; IS________NPM-NEXT: br i1 false, label [[DEAD:%.*]], label [[F2:%.*]]
; IS________NPM: f:
; IS________NPM-NEXT: br label [[J:%.*]]
; IS________NPM: f2:
; IS________NPM-NEXT: [[L:%.*]] = load i8, i8* [[TMP0]], align 16
; IS________NPM-NEXT: call void @usei8(i8 [[L]])
; IS________NPM-NEXT: call void @no_sync_func(i8* nocapture nofree noundef align 16 [[TMP0]]) #[[ATTR6:[0-9]+]]
; IS________NPM-NEXT: br label [[J]]
; IS________NPM: dead:
; IS________NPM-NEXT: unreachable
; IS________NPM: j:
; IS________NPM-NEXT: [[PHI:%.*]] = phi i8* [ [[TMP0]], [[F]] ], [ null, [[F2]] ]
; IS________NPM-NEXT: tail call void @no_sync_func(i8* nocapture nofree noundef align 16 [[PHI]]) #[[ATTR6]]
; IS________NPM-NEXT: ret void
;
entry:
%add = add i64 2, 2
%m = tail call align 16 noalias i8* @malloc(i64 %add)
br i1 %c, label %t, label %f
t:
br i1 false, label %dead, label %f2
f:
br label %j
f2:
%c1 = bitcast i8* %m to i32*
%c2 = bitcast i32* %c1 to i8*
%l = load i8, i8* %c2
call void @usei8(i8 %l)
call void @no_sync_func(i8* noundef %c2) nounwind
br label %j
dead:
br label %j
j:
%phi = phi i8* [ %m, %f ], [ null, %f2 ], [ %A, %dead ]
tail call void @no_sync_func(i8* noundef %phi) nounwind
;tail call void @free(i8* %m)
ret void
}
define void @nofree_arg_only(i8* %p1, i8* %p2) {
; CHECK-LABEL: define {{[^@]+}}@nofree_arg_only
; CHECK-SAME: (i8* nocapture nofree [[P1:%.*]], i8* nocapture [[P2:%.*]]) {
; CHECK-NEXT: tail call void @free(i8* nocapture [[P2]])
; CHECK-NEXT: tail call void @nofree_func(i8* nocapture nofree [[P1]])
; CHECK-NEXT: ret void
;
tail call void @free(i8* %p2)
tail call void @nofree_func(i8* %p1)
ret void
}
; TEST 1 - negative, pointer freed in another function.
define void @test1() {
; CHECK-LABEL: define {{[^@]+}}@test1() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; CHECK-NEXT: tail call void @nocapture_func_frees_pointer(i8* noalias nocapture [[TMP1]])
; CHECK-NEXT: tail call void (...) @func_throws()
; CHECK-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @nocapture_func_frees_pointer(i8* %1)
tail call void (...) @func_throws()
tail call void @free(i8* %1)
ret void
}
; TEST 2 - negative, call to a sync function.
define void @test2() {
; CHECK-LABEL: define {{[^@]+}}@test2() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; CHECK-NEXT: tail call void @sync_func(i8* [[TMP1]])
; CHECK-NEXT: tail call void @free(i8* nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
; TEST 3 - 1 malloc, 1 free
define void @test3() {
; IS________OPM-LABEL: define {{[^@]+}}@test3() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test3() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
define void @test3a(i8* %p) {
; IS________OPM-LABEL: define {{[^@]+}}@test3a
; IS________OPM-SAME: (i8* nocapture [[P:%.*]]) {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @nofree_arg_only(i8* nocapture nofree [[TMP1]], i8* nocapture [[P]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test3a
; IS________NPM-SAME: (i8* nocapture [[P:%.*]]) {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @nofree_arg_only(i8* noalias nocapture nofree [[TMP1]], i8* nocapture [[P]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @nofree_arg_only(i8* %1, i8* %p)
tail call void @free(i8* %1)
ret void
}
declare noalias i8* @aligned_alloc(i64, i64)
define void @test3b(i8* %p) {
; IS________OPM-LABEL: define {{[^@]+}}@test3b
; IS________OPM-SAME: (i8* nocapture [[P:%.*]]) {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @aligned_alloc(i64 noundef 32, i64 noundef 128)
; IS________OPM-NEXT: tail call void @nofree_arg_only(i8* nocapture nofree [[TMP1]], i8* nocapture [[P]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test3b
; IS________NPM-SAME: (i8* nocapture [[P:%.*]]) {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 128, align 32
; IS________NPM-NEXT: tail call void @nofree_arg_only(i8* noalias nocapture nofree [[TMP1]], i8* nocapture [[P]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @aligned_alloc(i64 32, i64 128)
tail call void @nofree_arg_only(i8* %1, i8* %p)
tail call void @free(i8* %1)
ret void
}
; leave alone non-constant alignments.
define void @test3c(i64 %alignment) {
; CHECK-LABEL: define {{[^@]+}}@test3c
; CHECK-SAME: (i64 [[ALIGNMENT:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @aligned_alloc(i64 [[ALIGNMENT]], i64 noundef 128)
; CHECK-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @aligned_alloc(i64 %alignment, i64 128)
tail call void @free(i8* %1)
ret void
}
declare noalias i8* @calloc(i64, i64)
define void @test0() {
; IS________OPM-LABEL: define {{[^@]+}}@test0() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @calloc(i64 noundef 2, i64 noundef 4)
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test0() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 8, align 1
; IS________NPM-NEXT: [[CALLOC_BC:%.*]] = bitcast i8* [[TMP1]] to i8*
; IS________NPM-NEXT: call void @llvm.memset.p0i8.i64(i8* [[CALLOC_BC]], i8 0, i64 8, i1 false)
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @calloc(i64 2, i64 4)
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
; TEST 4
define void @test4() {
; IS________OPM-LABEL: define {{[^@]+}}@test4() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test4() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @nofree_func(i8* %1)
ret void
}
; TEST 5 - not all exit paths have a call to free, but all uses of malloc
; are in nofree functions and are not captured
define void @test5(i32, i8* %p) {
; IS________OPM-LABEL: define {{[^@]+}}@test5
; IS________OPM-SAME: (i32 [[TMP0:%.*]], i8* nocapture [[P:%.*]]) {
; IS________OPM-NEXT: [[TMP2:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: [[TMP3:%.*]] = icmp eq i32 [[TMP0]], 0
; IS________OPM-NEXT: br i1 [[TMP3]], label [[TMP5:%.*]], label [[TMP4:%.*]]
; IS________OPM: 4:
; IS________OPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP2]])
; IS________OPM-NEXT: br label [[TMP6:%.*]]
; IS________OPM: 5:
; IS________OPM-NEXT: tail call void @nofree_arg_only(i8* nocapture nofree [[TMP2]], i8* nocapture [[P]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP2]])
; IS________OPM-NEXT: br label [[TMP6]]
; IS________OPM: 6:
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test5
; IS________NPM-SAME: (i32 [[TMP0:%.*]], i8* nocapture [[P:%.*]]) {
; IS________NPM-NEXT: [[TMP2:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: [[TMP3:%.*]] = icmp eq i32 [[TMP0]], 0
; IS________NPM-NEXT: br i1 [[TMP3]], label [[TMP5:%.*]], label [[TMP4:%.*]]
; IS________NPM: 4:
; IS________NPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP2]])
; IS________NPM-NEXT: br label [[TMP6:%.*]]
; IS________NPM: 5:
; IS________NPM-NEXT: tail call void @nofree_arg_only(i8* noalias nocapture nofree [[TMP2]], i8* nocapture [[P]])
; IS________NPM-NEXT: br label [[TMP6]]
; IS________NPM: 6:
; IS________NPM-NEXT: ret void
;
%2 = tail call noalias i8* @malloc(i64 4)
%3 = icmp eq i32 %0, 0
br i1 %3, label %5, label %4
4: ; preds = %1
tail call void @nofree_func(i8* %2)
br label %6
5: ; preds = %1
tail call void @nofree_arg_only(i8* %2, i8* %p)
tail call void @free(i8* %2)
br label %6
6: ; preds = %5, %4
ret void
}
; TEST 6 - all exit paths have a call to free
define void @test6(i32) {
; IS________OPM-LABEL: define {{[^@]+}}@test6
; IS________OPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________OPM-NEXT: [[TMP2:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: [[TMP3:%.*]] = icmp eq i32 [[TMP0]], 0
; IS________OPM-NEXT: br i1 [[TMP3]], label [[TMP5:%.*]], label [[TMP4:%.*]]
; IS________OPM: 4:
; IS________OPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP2]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP2]])
; IS________OPM-NEXT: br label [[TMP6:%.*]]
; IS________OPM: 5:
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture [[TMP2]])
; IS________OPM-NEXT: br label [[TMP6]]
; IS________OPM: 6:
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test6
; IS________NPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________NPM-NEXT: [[TMP2:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: [[TMP3:%.*]] = icmp eq i32 [[TMP0]], 0
; IS________NPM-NEXT: br i1 [[TMP3]], label [[TMP5:%.*]], label [[TMP4:%.*]]
; IS________NPM: 4:
; IS________NPM-NEXT: tail call void @nofree_func(i8* noalias nocapture nofree [[TMP2]])
; IS________NPM-NEXT: br label [[TMP6:%.*]]
; IS________NPM: 5:
; IS________NPM-NEXT: br label [[TMP6]]
; IS________NPM: 6:
; IS________NPM-NEXT: ret void
;
%2 = tail call noalias i8* @malloc(i64 4)
%3 = icmp eq i32 %0, 0
br i1 %3, label %5, label %4
4: ; preds = %1
tail call void @nofree_func(i8* %2)
tail call void @free(i8* %2)
br label %6
5: ; preds = %1
tail call void @free(i8* %2)
br label %6
6: ; preds = %5, %4
ret void
}
; TEST 7 - free is dead.
define void @test7() {
; IS________OPM: Function Attrs: noreturn
; IS________OPM-LABEL: define {{[^@]+}}@test7
; IS________OPM-SAME: () #[[ATTR3:[0-9]+]] {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: [[TMP2:%.*]] = tail call i32 @no_return_call() #[[ATTR3]]
; IS________OPM-NEXT: unreachable
;
; IS________NPM: Function Attrs: noreturn
; IS________NPM-LABEL: define {{[^@]+}}@test7
; IS________NPM-SAME: () #[[ATTR3:[0-9]+]] {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: [[TMP2:%.*]] = tail call i32 @no_return_call() #[[ATTR3]]
; IS________NPM-NEXT: unreachable
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call i32 @no_return_call()
tail call void @free(i8* %1)
ret void
}
; TEST 8 - Negative: bitcast pointer used in capture function
define void @test8() {
; CHECK-LABEL: define {{[^@]+}}@test8() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; CHECK-NEXT: store i32 10, i32* [[TMP2]], align 4
; CHECK-NEXT: tail call void @foo(i32* noundef align 4 [[TMP2]])
; CHECK-NEXT: tail call void @free(i8* nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @foo(i32* %2)
tail call void @free(i8* %1)
ret void
}
; TEST 9 - FIXME: malloc should be converted.
define void @test9() {
; IS________OPM-LABEL: define {{[^@]+}}@test9() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________OPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________OPM-NEXT: tail call void @foo_nounw(i32* nofree noundef align 4 [[TMP2]]) #[[ATTR5]]
; IS________OPM-NEXT: tail call void @free(i8* nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test9() {
; IS________NPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________NPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________NPM-NEXT: tail call void @foo_nounw(i32* nofree noundef align 4 [[TMP2]]) #[[ATTR6]]
; IS________NPM-NEXT: tail call void @free(i8* nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @foo_nounw(i32* %2)
tail call void @free(i8* %1)
ret void
}
; TEST 10 - 1 malloc, 1 free
define i32 @test10() {
; IS________OPM-LABEL: define {{[^@]+}}@test10() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________OPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________OPM-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________OPM-NEXT: ret i32 [[TMP3]]
;
; IS________NPM-LABEL: define {{[^@]+}}@test10() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________NPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________NPM-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________NPM-NEXT: ret i32 [[TMP3]]
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @free(i8* %1)
ret i32 %3
}
define i32 @test_lifetime() {
; IS________OPM-LABEL: define {{[^@]+}}@test_lifetime() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________OPM-NEXT: call void @llvm.lifetime.start.p0i8(i64 noundef 4, i8* noalias nocapture nofree noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________OPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________OPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________OPM-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________OPM-NEXT: ret i32 [[TMP3]]
;
; IS________NPM-LABEL: define {{[^@]+}}@test_lifetime() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; IS________NPM-NEXT: call void @llvm.lifetime.start.p0i8(i64 noundef 4, i8* noalias nocapture nofree noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; IS________NPM-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; IS________NPM-NEXT: store i32 10, i32* [[TMP2]], align 4
; IS________NPM-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________NPM-NEXT: ret i32 [[TMP3]]
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @no_sync_func(i8* %1)
call void @llvm.lifetime.start.p0i8(i64 4, i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @free(i8* %1)
ret i32 %3
}
; TEST 11
define void @test11() {
; IS________OPM-LABEL: define {{[^@]+}}@test11() {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: tail call void @sync_will_return(i8* [[TMP1]]) #[[ATTR5]]
; IS________OPM-NEXT: tail call void @free(i8* nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test11() {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: tail call void @sync_will_return(i8* [[TMP1]]) #[[ATTR6]]
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
tail call void @sync_will_return(i8* %1)
tail call void @free(i8* %1)
ret void
}
; TEST 12
define i32 @irreducible_cfg(i32 %0) {
; IS________OPM-LABEL: define {{[^@]+}}@irreducible_cfg
; IS________OPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________OPM-NEXT: [[TMP2:%.*]] = call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: [[TMP3:%.*]] = bitcast i8* [[TMP2]] to i32*
; IS________OPM-NEXT: store i32 10, i32* [[TMP3]], align 4
; IS________OPM-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP0]], 1
; IS________OPM-NEXT: br i1 [[TMP4]], label [[TMP5:%.*]], label [[TMP7:%.*]]
; IS________OPM: 5:
; IS________OPM-NEXT: [[TMP6:%.*]] = add nsw i32 [[TMP0]], 5
; IS________OPM-NEXT: br label [[TMP13:%.*]]
; IS________OPM: 7:
; IS________OPM-NEXT: br label [[TMP8:%.*]]
; IS________OPM: 8:
; IS________OPM-NEXT: [[DOT0:%.*]] = phi i32 [ [[TMP14:%.*]], [[TMP13]] ], [ 1, [[TMP7]] ]
; IS________OPM-NEXT: [[TMP9:%.*]] = load i32, i32* [[TMP3]], align 4
; IS________OPM-NEXT: [[TMP10:%.*]] = add nsw i32 [[TMP9]], -1
; IS________OPM-NEXT: store i32 [[TMP10]], i32* [[TMP3]], align 4
; IS________OPM-NEXT: [[TMP11:%.*]] = icmp ne i32 [[TMP9]], 0
; IS________OPM-NEXT: br i1 [[TMP11]], label [[TMP12:%.*]], label [[TMP15:%.*]]
; IS________OPM: 12:
; IS________OPM-NEXT: br label [[TMP13]]
; IS________OPM: 13:
; IS________OPM-NEXT: [[DOT1:%.*]] = phi i32 [ [[TMP6]], [[TMP5]] ], [ [[DOT0]], [[TMP12]] ]
; IS________OPM-NEXT: [[TMP14]] = add nsw i32 [[DOT1]], 1
; IS________OPM-NEXT: br label [[TMP8]]
; IS________OPM: 15:
; IS________OPM-NEXT: [[TMP16:%.*]] = load i32, i32* [[TMP3]], align 4
; IS________OPM-NEXT: [[TMP17:%.*]] = bitcast i32* [[TMP3]] to i8*
; IS________OPM-NEXT: call void @free(i8* nocapture noundef [[TMP17]])
; IS________OPM-NEXT: [[TMP18:%.*]] = load i32, i32* [[TMP3]], align 4
; IS________OPM-NEXT: ret i32 [[TMP18]]
;
; IS________NPM-LABEL: define {{[^@]+}}@irreducible_cfg
; IS________NPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________NPM-NEXT: [[TMP2:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: [[TMP3:%.*]] = bitcast i8* [[TMP2]] to i32*
; IS________NPM-NEXT: store i32 10, i32* [[TMP3]], align 4
; IS________NPM-NEXT: [[TMP4:%.*]] = icmp eq i32 [[TMP0]], 1
; IS________NPM-NEXT: br i1 [[TMP4]], label [[TMP5:%.*]], label [[TMP7:%.*]]
; IS________NPM: 5:
; IS________NPM-NEXT: [[TMP6:%.*]] = add nsw i32 [[TMP0]], 5
; IS________NPM-NEXT: br label [[TMP13:%.*]]
; IS________NPM: 7:
; IS________NPM-NEXT: br label [[TMP8:%.*]]
; IS________NPM: 8:
; IS________NPM-NEXT: [[DOT0:%.*]] = phi i32 [ [[TMP14:%.*]], [[TMP13]] ], [ 1, [[TMP7]] ]
; IS________NPM-NEXT: [[TMP9:%.*]] = load i32, i32* [[TMP3]], align 4
; IS________NPM-NEXT: [[TMP10:%.*]] = add nsw i32 [[TMP9]], -1
; IS________NPM-NEXT: store i32 [[TMP10]], i32* [[TMP3]], align 4
; IS________NPM-NEXT: [[TMP11:%.*]] = icmp ne i32 [[TMP9]], 0
; IS________NPM-NEXT: br i1 [[TMP11]], label [[TMP12:%.*]], label [[TMP15:%.*]]
; IS________NPM: 12:
; IS________NPM-NEXT: br label [[TMP13]]
; IS________NPM: 13:
; IS________NPM-NEXT: [[DOT1:%.*]] = phi i32 [ [[TMP6]], [[TMP5]] ], [ [[DOT0]], [[TMP12]] ]
; IS________NPM-NEXT: [[TMP14]] = add nsw i32 [[DOT1]], 1
; IS________NPM-NEXT: br label [[TMP8]]
; IS________NPM: 15:
; IS________NPM-NEXT: [[TMP16:%.*]] = load i32, i32* [[TMP3]], align 4
; IS________NPM-NEXT: ret i32 [[TMP16]]
;
%2 = call noalias i8* @malloc(i64 4)
%3 = bitcast i8* %2 to i32*
store i32 10, i32* %3, align 4
%4 = icmp eq i32 %0, 1
br i1 %4, label %5, label %7
5: ; preds = %1
%6 = add nsw i32 %0, 5
br label %13
7: ; preds = %1
br label %8
8: ; preds = %13, %7
%.0 = phi i32 [ %14, %13 ], [ 1, %7 ]
%9 = load i32, i32* %3, align 4
%10 = add nsw i32 %9, -1
store i32 %10, i32* %3, align 4
%11 = icmp ne i32 %9, 0
br i1 %11, label %12, label %15
12: ; preds = %8
br label %13
13: ; preds = %12, %5
%.1 = phi i32 [ %6, %5 ], [ %.0, %12 ]
%14 = add nsw i32 %.1, 1
br label %8
15: ; preds = %8
%16 = load i32, i32* %3, align 4
%17 = bitcast i32* %3 to i8*
call void @free(i8* %17)
%18 = load i32, i32* %3, align 4
ret i32 %18
}
define i32 @malloc_in_loop(i32 %0) {
; IS________OPM-LABEL: define {{[^@]+}}@malloc_in_loop
; IS________OPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________OPM-NEXT: [[TMP2:%.*]] = alloca i32, align 4
; IS________OPM-NEXT: [[TMP3:%.*]] = alloca i32*, align 8
; IS________OPM-NEXT: store i32 [[TMP0]], i32* [[TMP2]], align 4
; IS________OPM-NEXT: br label [[TMP4:%.*]]
; IS________OPM: 4:
; IS________OPM-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________OPM-NEXT: [[TMP6:%.*]] = add nsw i32 [[TMP5]], -1
; IS________OPM-NEXT: store i32 [[TMP6]], i32* [[TMP2]], align 4
; IS________OPM-NEXT: [[TMP7:%.*]] = icmp sgt i32 [[TMP6]], 0
; IS________OPM-NEXT: br i1 [[TMP7]], label [[TMP8:%.*]], label [[TMP11:%.*]]
; IS________OPM: 8:
; IS________OPM-NEXT: [[TMP9:%.*]] = call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: [[TMP10:%.*]] = bitcast i8* [[TMP9]] to i32*
; IS________OPM-NEXT: br label [[TMP4]]
; IS________OPM: 11:
; IS________OPM-NEXT: ret i32 5
;
; IS________NPM-LABEL: define {{[^@]+}}@malloc_in_loop
; IS________NPM-SAME: (i32 [[TMP0:%.*]]) {
; IS________NPM-NEXT: [[TMP2:%.*]] = alloca i32, align 4
; IS________NPM-NEXT: [[TMP3:%.*]] = alloca i32*, align 8
; IS________NPM-NEXT: store i32 [[TMP0]], i32* [[TMP2]], align 4
; IS________NPM-NEXT: br label [[TMP4:%.*]]
; IS________NPM: 4:
; IS________NPM-NEXT: [[TMP5:%.*]] = load i32, i32* [[TMP2]], align 4
; IS________NPM-NEXT: [[TMP6:%.*]] = add nsw i32 [[TMP5]], -1
; IS________NPM-NEXT: store i32 [[TMP6]], i32* [[TMP2]], align 4
; IS________NPM-NEXT: [[TMP7:%.*]] = icmp sgt i32 [[TMP6]], 0
; IS________NPM-NEXT: br i1 [[TMP7]], label [[TMP8:%.*]], label [[TMP11:%.*]]
; IS________NPM: 8:
; IS________NPM-NEXT: [[TMP9:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: [[TMP10:%.*]] = bitcast i8* [[TMP9]] to i32*
; IS________NPM-NEXT: br label [[TMP4]]
; IS________NPM: 11:
; IS________NPM-NEXT: ret i32 5
;
%2 = alloca i32, align 4
%3 = alloca i32*, align 8
store i32 %0, i32* %2, align 4
br label %4
4: ; preds = %8, %1
%5 = load i32, i32* %2, align 4
%6 = add nsw i32 %5, -1
store i32 %6, i32* %2, align 4
%7 = icmp sgt i32 %6, 0
br i1 %7, label %8, label %11
8: ; preds = %4
%9 = call noalias i8* @malloc(i64 4)
%10 = bitcast i8* %9 to i32*
store i32 1, i32* %10, align 8
br label %4
11: ; preds = %4
ret i32 5
}
; Malloc/Calloc too large
define i32 @test13() {
; CHECK-LABEL: define {{[^@]+}}@test13() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 256)
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; CHECK-NEXT: store i32 10, i32* [[TMP2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; CHECK-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = tail call noalias i8* @malloc(i64 256)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @free(i8* %1)
ret i32 %3
}
define i32 @test_sle() {
; CHECK-LABEL: define {{[^@]+}}@test_sle() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef -1)
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; CHECK-NEXT: store i32 10, i32* [[TMP2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; CHECK-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = tail call noalias i8* @malloc(i64 -1)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @free(i8* %1)
ret i32 %3
}
define i32 @test_overflow() {
; CHECK-LABEL: define {{[^@]+}}@test_overflow() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @calloc(i64 noundef 65537, i64 noundef 65537)
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: [[TMP2:%.*]] = bitcast i8* [[TMP1]] to i32*
; CHECK-NEXT: store i32 10, i32* [[TMP2]], align 4
; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP2]], align 4
; CHECK-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull align 4 dereferenceable(4) [[TMP1]])
; CHECK-NEXT: ret i32 [[TMP3]]
;
%1 = tail call noalias i8* @calloc(i64 65537, i64 65537)
tail call void @no_sync_func(i8* %1)
%2 = bitcast i8* %1 to i32*
store i32 10, i32* %2
%3 = load i32, i32* %2
tail call void @free(i8* %1)
ret i32 %3
}
define void @test14() {
; CHECK-LABEL: define {{[^@]+}}@test14() {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @calloc(i64 noundef 64, i64 noundef 4)
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @calloc(i64 64, i64 4)
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
define void @test15(i64 %S) {
; CHECK-LABEL: define {{[^@]+}}@test15
; CHECK-SAME: (i64 [[S:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 [[S]])
; CHECK-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree [[TMP1]])
; CHECK-NEXT: tail call void @free(i8* noalias nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 %S)
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
define void @test16a(i8 %v, i8** %P) {
; IS________OPM-LABEL: define {{[^@]+}}@test16a
; IS________OPM-SAME: (i8 [[V:%.*]], i8** nocapture nofree readnone [[P:%.*]]) {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: store i8 [[V]], i8* [[TMP1]], align 1
; IS________OPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree noundef nonnull dereferenceable(1) [[TMP1]])
; IS________OPM-NEXT: tail call void @free(i8* noalias nocapture noundef nonnull dereferenceable(1) [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test16a
; IS________NPM-SAME: (i8 [[V:%.*]], i8** nocapture nofree readnone [[P:%.*]]) {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: store i8 [[V]], i8* [[TMP1]], align 1
; IS________NPM-NEXT: tail call void @no_sync_func(i8* noalias nocapture nofree noundef nonnull dereferenceable(1) [[TMP1]])
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
store i8 %v, i8* %1
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* nonnull dereferenceable(1) %1)
ret void
}
define void @test16b(i8 %v, i8** %P) {
; CHECK-LABEL: define {{[^@]+}}@test16b
; CHECK-SAME: (i8 [[V:%.*]], i8** nocapture nofree writeonly [[P:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; CHECK-NEXT: store i8* [[TMP1]], i8** [[P]], align 8
; CHECK-NEXT: tail call void @no_sync_func(i8* nocapture nofree [[TMP1]])
; CHECK-NEXT: tail call void @free(i8* nocapture [[TMP1]])
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
store i8* %1, i8** %P
tail call void @no_sync_func(i8* %1)
tail call void @free(i8* %1)
ret void
}
define void @test16c(i8 %v, i8** %P) {
; IS________OPM-LABEL: define {{[^@]+}}@test16c
; IS________OPM-SAME: (i8 [[V:%.*]], i8** nocapture nofree writeonly [[P:%.*]]) {
; IS________OPM-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; IS________OPM-NEXT: store i8* [[TMP1]], i8** [[P]], align 8
; IS________OPM-NEXT: tail call void @no_sync_func(i8* nocapture nofree [[TMP1]]) #[[ATTR5]]
; IS________OPM-NEXT: tail call void @free(i8* nocapture [[TMP1]])
; IS________OPM-NEXT: ret void
;
; IS________NPM-LABEL: define {{[^@]+}}@test16c
; IS________NPM-SAME: (i8 [[V:%.*]], i8** nocapture nofree writeonly [[P:%.*]]) {
; IS________NPM-NEXT: [[TMP1:%.*]] = alloca i8, i64 4, align 1
; IS________NPM-NEXT: store i8* [[TMP1]], i8** [[P]], align 8
; IS________NPM-NEXT: tail call void @no_sync_func(i8* nocapture nofree [[TMP1]]) #[[ATTR6]]
; IS________NPM-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
store i8* %1, i8** %P
tail call void @no_sync_func(i8* %1) nounwind
tail call void @free(i8* %1)
ret void
}
define void @test16d(i8 %v, i8** %P) {
; CHECK-LABEL: define {{[^@]+}}@test16d
; CHECK-SAME: (i8 [[V:%.*]], i8** nocapture nofree writeonly [[P:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = tail call noalias i8* @malloc(i64 noundef 4)
; CHECK-NEXT: store i8* [[TMP1]], i8** [[P]], align 8
; CHECK-NEXT: ret void
;
%1 = tail call noalias i8* @malloc(i64 4)
store i8* %1, i8** %P
ret void
}
;.
; IS________OPM: attributes #[[ATTR0:[0-9]+]] = { nounwind willreturn }
; IS________OPM: attributes #[[ATTR1:[0-9]+]] = { nofree nosync willreturn }
; IS________OPM: attributes #[[ATTR2:[0-9]+]] = { nofree nounwind }
; IS________OPM: attributes #[[ATTR3]] = { noreturn }
; IS________OPM: attributes #[[ATTR4:[0-9]+]] = { argmemonly nofree nosync nounwind willreturn }
; IS________OPM: attributes #[[ATTR5]] = { nounwind }
;.
; IS________NPM: attributes #[[ATTR0:[0-9]+]] = { nounwind willreturn }
; IS________NPM: attributes #[[ATTR1:[0-9]+]] = { nofree nosync willreturn }
; IS________NPM: attributes #[[ATTR2:[0-9]+]] = { nofree nounwind }
; IS________NPM: attributes #[[ATTR3]] = { noreturn }
; IS________NPM: attributes #[[ATTR4:[0-9]+]] = { argmemonly nofree nosync nounwind willreturn }
; IS________NPM: attributes #[[ATTR5:[0-9]+]] = { argmemonly nofree nounwind willreturn writeonly }
; IS________NPM: attributes #[[ATTR6]] = { nounwind }
;.
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