derek.holloway
7502bf64a4
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72 lines
3.2 KiB
C
72 lines
3.2 KiB
C
// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 6
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// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -O2 -Wno-missing-declarations -emit-llvm -o - %s | FileCheck %s
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// See #110385
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// Based on reproducer from Kees Cook:
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// https://lore.kernel.org/all/202409170436.C3C6E7F7A@keescook/
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struct variable {
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int a;
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int b;
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int length;
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short array[] __attribute__((counted_by(length)));
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};
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struct bucket {
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int a;
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struct variable *growable;
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int b;
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};
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struct bucket2 {
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int a;
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struct variable growable;
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};
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void init(void * __attribute__((pass_dynamic_object_size(0))));
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// CHECK-LABEL: define dso_local void @test1(
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// CHECK-SAME: ptr noundef readonly captures(none) [[FOO:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[GROWABLE:%.*]] = getelementptr inbounds nuw i8, ptr [[FOO]], i64 8
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// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[GROWABLE]], align 8, !tbaa [[_ZTS8VARIABLEPTR_TBAA6:![0-9]+]]
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// CHECK-NEXT: [[ARRAY:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP0]], i64 12
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// CHECK-NEXT: [[COUNTED_BY_GEP:%.*]] = getelementptr inbounds nuw i8, ptr [[TMP0]], i64 8
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// CHECK-NEXT: [[COUNTED_BY_LOAD:%.*]] = load i32, ptr [[COUNTED_BY_GEP]], align 4
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// CHECK-NEXT: [[COUNT:%.*]] = sext i32 [[COUNTED_BY_LOAD]] to i64
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// CHECK-NEXT: [[FLEXIBLE_ARRAY_MEMBER_SIZE:%.*]] = shl nsw i64 [[COUNT]], 1
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// CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i32 [[COUNTED_BY_LOAD]], -1
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// CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i64 [[FLEXIBLE_ARRAY_MEMBER_SIZE]], i64 0
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// CHECK-NEXT: tail call void @init(ptr noundef nonnull [[ARRAY]], i64 noundef [[TMP2]]) #[[ATTR2:[0-9]+]]
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// CHECK-NEXT: ret void
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//
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void test1(struct bucket *foo) {
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init(foo->growable->array);
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}
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// CHECK-LABEL: define dso_local void @test2(
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// CHECK-SAME: ptr noundef [[FOO:%.*]]) local_unnamed_addr #[[ATTR0]] {
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// CHECK-NEXT: [[ENTRY:.*:]]
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// CHECK-NEXT: [[ARRAY:%.*]] = getelementptr inbounds nuw i8, ptr [[FOO]], i64 16
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// CHECK-NEXT: [[COUNTED_BY_GEP:%.*]] = getelementptr inbounds nuw i8, ptr [[FOO]], i64 12
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// CHECK-NEXT: [[COUNTED_BY_LOAD:%.*]] = load i32, ptr [[COUNTED_BY_GEP]], align 4
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// CHECK-NEXT: [[COUNT:%.*]] = sext i32 [[COUNTED_BY_LOAD]] to i64
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// CHECK-NEXT: [[FLEXIBLE_ARRAY_MEMBER_SIZE:%.*]] = shl nsw i64 [[COUNT]], 1
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// CHECK-NEXT: [[TMP0:%.*]] = icmp sgt i32 [[COUNTED_BY_LOAD]], -1
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// CHECK-NEXT: [[TMP1:%.*]] = select i1 [[TMP0]], i64 [[FLEXIBLE_ARRAY_MEMBER_SIZE]], i64 0
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// CHECK-NEXT: tail call void @init(ptr noundef nonnull [[ARRAY]], i64 noundef [[TMP1]]) #[[ATTR2]]
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// CHECK-NEXT: ret void
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//
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void test2(struct bucket2 *foo) {
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init(foo->growable.array);
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}
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//.
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// CHECK: [[META3:![0-9]+]] = !{!"int", [[META4:![0-9]+]], i64 0}
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// CHECK: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
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// CHECK: [[META5]] = !{!"Simple C/C++ TBAA"}
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// CHECK: [[_ZTS8VARIABLEPTR_TBAA6]] = !{[[META7:![0-9]+]], [[META8:![0-9]+]], i64 8}
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// CHECK: [[META7]] = !{!"bucket", [[META3]], i64 0, [[META8]], i64 8, [[META3]], i64 16}
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// CHECK: [[META8]] = !{!"p1 _ZTS8variable", [[META9:![0-9]+]], i64 0}
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// CHECK: [[META9]] = !{!"any pointer", [[META4]], i64 0}
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//.
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