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clang-p2996/clang/test/CodeGen/object-size.c
Sirraide 12f78e740c [Clang] [NFC] Fix unintended -Wreturn-type warnings everywhere in the test suite (#123464) 
In preparation of making `-Wreturn-type` default to an error (as there
is virtually no situation where you’d *want* to fall off the end of a
function that is supposed to return a value), this patch fixes tests
that have relied on this being only a warning, of which there seem 
to be 3 kinds:

1. Tests which for no apparent reason have a function that triggers the
warning.

I suspect that a lot of these were on accident (or from before the
warning was introduced), since a lot of people will open issues w/ their
problematic code in the `main` function (which is the one case where you
don’t need to return from a non-void function, after all...), which
someone will then copy, possibly into a namespace, possibly renaming it,
the end result of that being that you end up w/ something that
definitely is not `main` anymore, but which still is declared as
returning `int`, and which still has no return statement (another reason
why I think this might apply to a lot of these is because usually the
actual return type of such problematic functions is quite literally
`int`).
  
A lot of these are really old tests that don’t use `-verify`, which is
why no-one noticed or had to care about the extra warning that was
already being emitted by them until now.

2. Tests which test either `-Wreturn-type`, `[[noreturn]]`, or what
codegen and sanitisers do whenever you do fall off the end of a
function.

3. Tests where I struggle to figure out what is even being tested
(usually because they’re Objective-C tests, and I don’t know
Objective-C), whether falling off the end of a function matters in the
first place, and tests where actually spelling out an expression to
return would be rather cumbersome (e.g. matrix types currently don’t
support list initialisation, so I can’t write e.g. `return {}`).

For tests that fall into categories 2 and 3, I just added
`-Wno-error=return-type` to the `RUN` lines and called it a day. This
was especially necessary for the former since `-Wreturn-type` is an
analysis-based warning, meaning that it is currently impossible to test
for more than one occurrence of it in the same compilation if it
defaults to an error since the analysis pass is skipped for subsequent
functions as soon as an error is emitted.

I’ve also added `-Werror=return-type` to a few tests that I had already
updated as this patch was previously already making the warning an error
by default, but we’ve decided to split that into two patches instead.
2025-01-18 19:16:33 +01:00

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// RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-apple-darwin -emit-llvm %s -o - 2>&1 | FileCheck %s
// RUN: %clang_cc1 -no-enable-noundef-analysis -DDYNAMIC -triple x86_64-apple-darwin -emit-llvm %s -o - 2>&1 | FileCheck %s
#ifndef DYNAMIC
#define OBJECT_SIZE_BUILTIN __builtin_object_size
#else
#define OBJECT_SIZE_BUILTIN __builtin_dynamic_object_size
#endif
#define strcpy(dest, src) \
((OBJECT_SIZE_BUILTIN(dest, 0) != -1ULL) \
? __builtin___strcpy_chk (dest, src, OBJECT_SIZE_BUILTIN(dest, 1)) \
: __inline_strcpy_chk(dest, src))
static char *__inline_strcpy_chk (char *dest, const char *src) {
return __builtin___strcpy_chk(dest, src, OBJECT_SIZE_BUILTIN(dest, 1));
}
char gbuf[63];
char *gp;
int gi, gj;
// CHECK-LABEL: define{{.*}} void @test1
void test1(void) {
// CHECK: = call ptr @__strcpy_chk(ptr getelementptr inbounds ([63 x i8], ptr @gbuf, i64 0, i64 4), ptr @.str, i64 59)
strcpy(&gbuf[4], "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test2
void test2(void) {
// CHECK: = call ptr @__strcpy_chk(ptr @gbuf, ptr @.str, i64 63)
strcpy(gbuf, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test3
void test3(void) {
// CHECK: = call ptr @__strcpy_chk(ptr getelementptr inbounds ([63 x i8], ptr @gbuf, i64 0, i64 100), ptr @.str, i64 0)
strcpy(&gbuf[100], "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test4
void test4(void) {
// CHECK: = call ptr @__strcpy_chk(ptr getelementptr inbounds ([63 x i8], ptr @gbuf, i64 0, i64 -1), ptr @.str, i64 0)
strcpy((char*)(void*)&gbuf[-1], "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test5
void test5(void) {
// CHECK: = load ptr, ptr @gp
// CHECK-NEXT:= call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
strcpy(gp, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test6
void test6(void) {
char buf[57];
// CHECK: = call ptr @__strcpy_chk(ptr %{{.*}}, ptr @.str, i64 53)
strcpy(&buf[4], "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test7
void test7(void) {
int i;
// Ensure we only evaluate the side-effect once.
// CHECK: = add
// CHECK-NOT: = add
// CHECK: = call ptr @__strcpy_chk(ptr @gbuf, ptr @.str, i64 63)
strcpy((++i, gbuf), "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test8
void test8(void) {
char *buf[50];
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(buf[++gi], "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test9
void test9(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy((char *)((++gi) + gj), "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test10
char **p;
void test10(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(*(++p), "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test11
void test11(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr @gbuf, ptr @.str)
strcpy(gp = gbuf, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test12
void test12(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(++gp, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test13
void test13(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(gp++, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test14
void test14(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(--gp, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test15
void test15(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{..*}}, ptr @.str)
strcpy(gp--, "Hi there");
}
// CHECK-LABEL: define{{.*}} void @test16
void test16(void) {
// CHECK-NOT: __strcpy_chk
// CHECK: = call ptr @__inline_strcpy_chk(ptr %{{.*}}, ptr @.str)
strcpy(gp += 1, "Hi there");
}
// CHECK-LABEL: @test17
void test17(void) {
// CHECK: store i32 -1
gi = OBJECT_SIZE_BUILTIN(gp++, 0);
// CHECK: store i32 -1
gi = OBJECT_SIZE_BUILTIN(gp++, 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(gp++, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(gp++, 3);
}
// CHECK-LABEL: @test18
unsigned test18(int cond) {
int a[4], b[4];
// CHECK: phi ptr
// CHECK: call i64 @llvm.objectsize.i64
return OBJECT_SIZE_BUILTIN(cond ? a : b, 0);
}
// CHECK-LABEL: @test19
void test19(void) {
struct {
int a, b;
} foo;
// CHECK: store i32 8
gi = OBJECT_SIZE_BUILTIN(&foo.a, 0);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.a, 1);
// CHECK: store i32 8
gi = OBJECT_SIZE_BUILTIN(&foo.a, 2);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.a, 3);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.b, 0);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.b, 1);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.b, 2);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&foo.b, 3);
}
// CHECK-LABEL: @test20
void test20(void) {
struct { int t[10]; } t[10];
// CHECK: store i32 380
gi = OBJECT_SIZE_BUILTIN(&t[0].t[5], 0);
// CHECK: store i32 20
gi = OBJECT_SIZE_BUILTIN(&t[0].t[5], 1);
// CHECK: store i32 380
gi = OBJECT_SIZE_BUILTIN(&t[0].t[5], 2);
// CHECK: store i32 20
gi = OBJECT_SIZE_BUILTIN(&t[0].t[5], 3);
}
// CHECK-LABEL: @test21
void test21(void) {
struct { int t; } t;
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t + 1, 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t + 1, 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t + 1, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t + 1, 3);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t.t + 1, 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t.t + 1, 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t.t + 1, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t.t + 1, 3);
}
// CHECK-LABEL: @test22
void test22(void) {
struct { int t[10]; } t[10];
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[10], 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[10], 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[10], 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[10], 3);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[9].t[10], 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[9].t[10], 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[9].t[10], 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[9].t[10], 3);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[0] + sizeof(t), 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[0] + sizeof(t), 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[0] + sizeof(t), 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[0] + sizeof(t), 3);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[9].t[0] + 10*sizeof(t[0].t), 0);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[9].t[0] + 10*sizeof(t[0].t), 1);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[9].t[0] + 10*sizeof(t[0].t), 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((char*)&t[9].t[0] + 10*sizeof(t[0].t), 3);
}
struct Test23Ty { int a; int t[10]; };
// CHECK-LABEL: @test23
void test23(struct Test23Ty *p) {
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(p, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(p, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(p, 2);
// Note: this is currently fixed at 0 because LLVM doesn't have sufficient
// data to correctly handle type=3
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(p, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&p->a, 0);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&p->a, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&p->a, 2);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&p->a, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&p->t[5], 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&p->t[5], 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&p->t[5], 2);
// CHECK: store i32 20
gi = OBJECT_SIZE_BUILTIN(&p->t[5], 3);
}
// PR24493 -- ICE if OBJECT_SIZE_BUILTIN called with NULL and (Type & 1) != 0
// CHECK-LABEL: @test24
void test24(void) {
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0, 2);
// Note: Currently fixed at zero because LLVM can't handle type=3 correctly.
// Hopefully will be lowered properly in the future.
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((void*)0, 3);
}
// CHECK-LABEL: @test25
void test25(void) {
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0x1000, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0x1000, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0x1000, 2);
// Note: Currently fixed at zero because LLVM can't handle type=3 correctly.
// Hopefully will be lowered properly in the future.
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((void*)0x1000, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0 + 0x1000, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0 + 0x1000, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN((void*)0 + 0x1000, 2);
// Note: Currently fixed at zero because LLVM can't handle type=3 correctly.
// Hopefully will be lowered properly in the future.
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN((void*)0 + 0x1000, 3);
}
// CHECK-LABEL: @test26
void test26(void) {
struct { int v[10]; } t[10];
// CHECK: store i32 316
gi = OBJECT_SIZE_BUILTIN(&t[1].v[11], 0);
// CHECK: store i32 312
gi = OBJECT_SIZE_BUILTIN(&t[1].v[12], 1);
// CHECK: store i32 308
gi = OBJECT_SIZE_BUILTIN(&t[1].v[13], 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&t[1].v[14], 3);
}
struct Test27IncompleteTy;
// CHECK-LABEL: @test27
void test27(struct Test27IncompleteTy *t) {
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(t, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(t, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(t, 2);
// Note: this is currently fixed at 0 because LLVM doesn't have sufficient
// data to correctly handle type=3
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(t, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&test27, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&test27, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr {{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&test27, 2);
// Note: this is currently fixed at 0 because LLVM doesn't have sufficient
// data to correctly handle type=3
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(&test27, 3);
}
// The intent of this test is to ensure that OBJECT_SIZE_BUILTIN treats `&foo`
// and `(T*)&foo` identically, when used as the pointer argument.
// CHECK-LABEL: @test28
void test28(void) {
struct { int v[10]; } t[10];
#define addCasts(s) ((char*)((short*)(s)))
// CHECK: store i32 360
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1]), 0);
// CHECK: store i32 360
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1]), 1);
// CHECK: store i32 360
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1]), 2);
// CHECK: store i32 360
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1]), 3);
// CHECK: store i32 356
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1].v[1]), 0);
// CHECK: store i32 36
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1].v[1]), 1);
// CHECK: store i32 356
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1].v[1]), 2);
// CHECK: store i32 36
gi = OBJECT_SIZE_BUILTIN(addCasts(&t[1].v[1]), 3);
#undef addCasts
}
struct DynStructVar {
char fst[16];
char snd[];
};
struct DynStruct0 {
char fst[16];
char snd[0];
};
struct DynStruct1 {
char fst[16];
char snd[1];
};
struct StaticStruct {
char fst[16];
char snd[2];
};
// CHECK-LABEL: @test29
void test29(struct DynStructVar *dv, struct DynStruct0 *d0,
struct DynStruct1 *d1, struct StaticStruct *ss) {
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(dv->snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(dv->snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(dv->snd, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(dv->snd, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d0->snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d0->snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d0->snd, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(d0->snd, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d1->snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d1->snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(d1->snd, 2);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(d1->snd, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(ss->snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(ss->snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(ss->snd, 2);
// CHECK: store i32 2
gi = OBJECT_SIZE_BUILTIN(ss->snd, 3);
}
// CHECK-LABEL: @test30
void test30(void) {
struct { struct DynStruct1 fst, snd; } *nested;
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(nested->fst.snd, 0);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(nested->fst.snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(nested->fst.snd, 2);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(nested->fst.snd, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(nested->snd.snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(nested->snd.snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(nested->snd.snd, 2);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(nested->snd.snd, 3);
union { struct DynStruct1 d1; char c[1]; } *u;
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->c, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->c, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->c, 2);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(u->c, 3);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->d1.snd, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->d1.snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(u->d1.snd, 2);
// CHECK: store i32 1
gi = OBJECT_SIZE_BUILTIN(u->d1.snd, 3);
}
// CHECK-LABEL: @test31
void test31(void) {
// Miscellaneous 'writing off the end' detection tests
struct DynStructVar *dsv;
struct DynStruct0 *ds0;
struct DynStruct1 *ds1;
struct StaticStruct *ss;
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(ds1[9].snd, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&ss[9].snd[0], 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&ds1[9].snd[0], 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&ds0[9].snd[0], 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(&dsv[9].snd[0], 1);
}
// CHECK-LABEL: @test32
static struct DynStructVar D32 = {
.fst = {},
.snd = { 0, 1, 2, },
};
unsigned long test32(void) {
// CHECK: ret i64 19
return OBJECT_SIZE_BUILTIN(&D32, 1);
}
// CHECK-LABEL: @test33
static struct DynStructVar D33 = {
.fst = {},
.snd = {},
};
unsigned long test33(void) {
// CHECK: ret i64 16
return OBJECT_SIZE_BUILTIN(&D33, 1);
}
// CHECK-LABEL: @test34
static struct DynStructVar D34 = {
.fst = {},
};
unsigned long test34(void) {
// CHECK: ret i64 16
return OBJECT_SIZE_BUILTIN(&D34, 1);
}
// CHECK-LABEL: @test35
unsigned long test35(void) {
// CHECK: ret i64 16
return OBJECT_SIZE_BUILTIN(&(struct DynStructVar){}, 1);
}
extern void *memset (void *s, int c, unsigned long n);
void test36(void) {
struct DynStructVar D;
// FORTIFY will check the object size of D. Test this doesn't assert when
// given a struct with a flexible array member that lacks an initializer.
memset(&D, 0, sizeof(D));
}
// CHECK-LABEL: @test37
struct Z { struct A { int x, y[]; } z; int a; int b[]; };
static struct Z my_z = { .b = {1,2,3} };
unsigned long test37 (void) {
// CHECK: ret i64 4
return OBJECT_SIZE_BUILTIN(&my_z.z, 1);
}
// CHECK-LABEL: @PR30346
void PR30346(void) {
struct sa_family_t {};
struct sockaddr {
struct sa_family_t sa_family;
char sa_data[14];
};
struct sockaddr *sa;
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(sa->sa_data, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 false, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(sa->sa_data, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0(ptr %{{.*}}, i1 true, i1 true, i1
gi = OBJECT_SIZE_BUILTIN(sa->sa_data, 2);
// CHECK: store i32 14
gi = OBJECT_SIZE_BUILTIN(sa->sa_data, 3);
}
extern char incomplete_char_array[];
// CHECK-LABEL: @incomplete_and_function_types
void incomplete_and_function_types(void) {
// CHECK: call i64 @llvm.objectsize.i64.p0
gi = OBJECT_SIZE_BUILTIN(incomplete_char_array, 0);
// CHECK: call i64 @llvm.objectsize.i64.p0
gi = OBJECT_SIZE_BUILTIN(incomplete_char_array, 1);
// CHECK: call i64 @llvm.objectsize.i64.p0
gi = OBJECT_SIZE_BUILTIN(incomplete_char_array, 2);
// CHECK: store i32 0
gi = OBJECT_SIZE_BUILTIN(incomplete_char_array, 3);
}
// Flips between the pointer and lvalue evaluator a lot.
void deeply_nested(void) {
struct {
struct {
struct {
struct {
int e[2];
char f; // Inhibit our writing-off-the-end check
} d[2];
} c[2];
} b[2];
} *a;
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&a->b[1].c[1].d[1].e[1], 1);
// CHECK: store i32 4
gi = OBJECT_SIZE_BUILTIN(&a->b[1].c[1].d[1].e[1], 3);
}
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