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llvm-project/clang/test/CodeGen/tbaa-pointers.c
Antonio Frighetto efcda54794
[clang][CodeGen] Emit llvm.tbaa.errno metadata during module creation 
Let Clang emit `llvm.tbaa.errno` metadata in order to let LLVM
carry out optimizations around errno-writing libcalls to, as
long as it is proved the involved memory location does not alias
`errno`.

Previous discussion: https://discourse.llvm.org/t/rfc-modelling-errno-memory-effects/82972.
2025-10-21 11:38:45 +02:00

273 lines
14 KiB
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// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --version 5
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes -no-pointer-tbaa %s -emit-llvm -o - | FileCheck --check-prefixes=COMMON,DISABLE %s
// RUN: %clang_cc1 -triple x86_64-apple-darwin -O1 -disable-llvm-passes %s -emit-llvm -o - | FileCheck --check-prefixes=COMMON,DEFAULT %s
void p2unsigned(unsigned **ptr) {
// COMMON-LABEL: define void @p2unsigned(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6:![0-9]+]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA10:![0-9]+]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6:![0-9]+]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
*ptr = 0;
}
void p2unsigned_volatile(unsigned *volatile *ptr) {
// COMMON-LABEL: define void @p2unsigned_volatile(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store volatile ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA10]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store volatile ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
*ptr = 0;
}
void p3int(int ***ptr) {
// COMMON-LABEL: define void @p3int(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA12:![0-9]+]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA12]]
// DEFAULT-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP1]], align 8, !tbaa [[TBAA10]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP1]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
**ptr = 0;
}
void p4char(char ****ptr) {
// COMMON-LABEL: define void @p4char(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15:![0-9]+]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15]]
// DEFAULT-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA18:![0-9]+]]
// DEFAULT-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA20:![0-9]+]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA22:![0-9]+]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
***ptr = 0;
}
void p4char_const1(const char ****ptr) {
// COMMON-LABEL: define void @p4char_const1(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15]]
// DEFAULT-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA18]]
// DEFAULT-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA20]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA22]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
***ptr = 0;
}
void p4char_const2(const char **const **ptr) {
// COMMON-LABEL: define void @p4char_const2(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA15]]
// DEFAULT-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA18]]
// DEFAULT-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA20]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA22]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP2:%.*]] = load ptr, ptr [[TMP1]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP2]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
***ptr = 0;
}
struct S1 {
int x;
int y;
};
void p2struct(struct S1 **ptr) {
// COMMON-LABEL: define void @p2struct(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA24:![0-9]+]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA24]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA26:![0-9]+]]
// DISABLE-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
*ptr = 0;
}
void p2struct_const(struct S1 const **ptr) {
// COMMON-LABEL: define void @p2struct_const(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA24]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA24]]
// DEFAULT-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA26]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: store ptr null, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: ret void
//
*ptr = 0;
}
struct S2 {
struct S1 *s;
};
void p2struct2(struct S2 *ptr) {
// COMMON-LABEL: define void @p2struct2(
// COMMON-SAME: ptr noundef [[PTR:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA28:![0-9]+]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA28]]
// DEFAULT-NEXT: [[S:%.*]] = getelementptr inbounds nuw [[STRUCT_S2:%.*]], ptr [[TMP0]], i32 0, i32 0
// DEFAULT-NEXT: store ptr null, ptr [[S]], align 8, !tbaa [[TBAA30:![0-9]+]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DISABLE-NEXT: [[S:%.*]] = getelementptr inbounds nuw [[STRUCT_S2:%.*]], ptr [[TMP0]], i32 0, i32 0
// DISABLE-NEXT: store ptr null, ptr [[S]], align 8, !tbaa [[TBAA8:![0-9]+]]
// COMMON-NEXT: ret void
ptr->s = 0;
}
void vla1(int n, int ptr[][n], int idx) {
// COMMON-LABEL: define void @vla1(
// COMMON-SAME: i32 noundef [[N:%.+]], ptr noundef [[PTR:%.+]], i32 noundef [[IDX:%.+]])
// COMMON: [[N_ADDR:%.+]] = alloca i32, align 4
// COMMON-NEXT: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// COMMON-NEXT: [[IDX_ADDR:%.+]] = alloca i32, align 4
// COMMON-NEXT: store i32 [[N]], ptr [[N_ADDR]], align 4, !tbaa [[TBAA2:![0-9]+]]
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA10]]
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: store i32 [[IDX]], ptr [[IDX_ADDR]], align 4, !tbaa [[TBAA2]]
// COMMON-NEXT: [[TMP0:%.*]] = load i32, ptr [[N_ADDR]], align 4, !tbaa [[TBAA2]]
// COMMON-NEXT: [[TMP1:%.*]] = zext i32 [[TMP0]] to i64
// DEFAULT-NEXT: [[TMP2:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA10]]
// DISABLE-NEXT: [[TMP2:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// COMMON-NEXT: [[TMP3:%.*]] = load i32, ptr [[IDX_ADDR]], align 4, !tbaa [[TBAA2]]
// COMMON-NEXT: [[IDXPROM:%.*]] = sext i32 [[TMP3]] to i64
// COMMON-NEXT: [[TMP4:%.*]] = mul nsw i64 [[IDXPROM]], [[TMP1]]
// COMMON-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[TMP2]], i64 [[TMP4]]
// COMMON-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i32, ptr [[ARRAYIDX]], i64 0
// COMMON-NEXT: store i32 0, ptr [[ARRAYIDX1]], align 4, !tbaa [[TBAA2]]
// COMMON-NEXT: ret void
ptr[idx][0] = 0;
}
typedef struct {
int i1;
} TypedefS;
void unamed_struct_typedef(TypedefS *ptr) {
// COMMON-LABEL: define void @unamed_struct_typedef(
// COMMON-SAME: ptr noundef [[PTRA:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA32:![0-9]+]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA32]]
// COMMON-NEXT: [[I1:%.*]] = getelementptr inbounds nuw [[STRUCT_TYPEDEFS:%.*]], ptr [[TMP0]], i32 0, i32 0
// DISABLE-NEXT: store i32 0, ptr [[I1]], align 4, !tbaa [[TBAA10:![0-9]+]]
// DEFAULT-NEXT: store i32 0, ptr [[I1]], align 4, !tbaa [[TBAA33:![0-9]+]]
// COMMON-NEXT: ret void
ptr->i1 = 0;
}
int void_ptrs(void **ptr) {
// COMMON-LABEL: define i32 @void_ptrs(
// COMMON-SAME: ptr noundef [[PTRA:%.+]])
// COMMON: [[PTR_ADDR:%.+]] = alloca ptr, align 8
// DISABLE-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: store ptr [[PTR]], ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA35:![0-9]+]]
// DISABLE-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: [[TMP0:%.*]] = load ptr, ptr [[PTR_ADDR]], align 8, !tbaa [[TBAA35]]
// DISABLE-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA6]]
// DEFAULT-NEXT: [[TMP1:%.*]] = load ptr, ptr [[TMP0]], align 8, !tbaa [[TBAA32]]
// COMMON-NEXT: [[TOBOOL:%.*]] = icmp ne ptr [[TMP1]], null
// COMMON-NEXT: [[TMP2:%.*]] = zext i1 [[TOBOOL]] to i64
// COMMON-NEXT: [[COND:%.*]] = select i1 [[TOBOOL]], i32 0, i32 1
// COMMON-NEXT: ret i32 [[COND]]
return *ptr ? 0 : 1;
}
// DISABLE: [[TBAA2]] = !{[[META3:![0-9]+]], [[META3]], i64 0}
// DISABLE: [[META3]] = !{!"int", [[META4:![0-9]+]], i64 0}
// DISABLE: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
// DISABLE: [[META5]] = !{!"Simple C/C++ TBAA"}
// DISABLE: [[TBAA6]] = !{[[META7:![0-9]+]], [[META7]], i64 0}
// DISABLE: [[META7]] = !{!"any pointer", [[META4]], i64 0}
// DISABLE: [[TBAA8]] = !{[[META9:![0-9]+]], [[META7]], i64 0}
// DISABLE: [[META9]] = !{!"S2", [[META7]], i64 0}
// DISABLE: [[TBAA10]] = !{[[META11:![0-9]+]], [[META3]], i64 0}
// DISABLE: [[META11]] = !{!"", [[META3]], i64 0}
// DEFAULT: [[TBAA2]] = !{[[META3:![0-9]+]], [[META3]], i64 0}
// DEFAULT: [[META3]] = !{!"int", [[META4:![0-9]+]], i64 0}
// DEFAULT: [[META4]] = !{!"omnipotent char", [[META5:![0-9]+]], i64 0}
// DEFAULT: [[META5]] = !{!"Simple C/C++ TBAA"}
// DEFAULT: [[TBAA6]] = !{[[META7:![0-9]+]], [[META7]], i64 0}
// DEFAULT: [[META7]] = !{!"p2 int", [[META8:![0-9]+]], i64 0}
// DEFAULT: [[META8]] = !{!"any p2 pointer", [[META9:![0-9]+]], i64 0}
// DEFAULT: [[META9]] = !{!"any pointer", [[META4]], i64 0}
// DEFAULT: [[TBAA10]] = !{[[META11:![0-9]+]], [[META11]], i64 0}
// DEFAULT: [[META11]] = !{!"p1 int", [[META9]], i64 0}
// DEFAULT: [[TBAA12]] = !{[[META13:![0-9]+]], [[META13]], i64 0}
// DEFAULT: [[META13]] = !{!"p3 int", [[META14:![0-9]+]], i64 0}
// DEFAULT: [[META14]] = !{!"any p3 pointer", [[META8]], i64 0}
// DEFAULT: [[TBAA15]] = !{[[META16:![0-9]+]], [[META16]], i64 0}
// DEFAULT: [[META16]] = !{!"p4 omnipotent char", [[META17:![0-9]+]], i64 0}
// DEFAULT: [[META17]] = !{!"any p4 pointer", [[META14]], i64 0}
// DEFAULT: [[TBAA18]] = !{[[META19:![0-9]+]], [[META19]], i64 0}
// DEFAULT: [[META19]] = !{!"p3 omnipotent char", [[META14]], i64 0}
// DEFAULT: [[TBAA20]] = !{[[META21:![0-9]+]], [[META21]], i64 0}
// DEFAULT: [[META21]] = !{!"p2 omnipotent char", [[META8]], i64 0}
// DEFAULT: [[TBAA22]] = !{[[META23:![0-9]+]], [[META23]], i64 0}
// DEFAULT: [[META23]] = !{!"p1 omnipotent char", [[META9]], i64 0}
// DEFAULT: [[TBAA24]] = !{[[META25:![0-9]+]], [[META25]], i64 0}
// DEFAULT: [[META25]] = !{!"p2 _ZTS2S1", [[META8]], i64 0}
// DEFAULT: [[TBAA26]] = !{[[META27:![0-9]+]], [[META27]], i64 0}
// DEFAULT: [[META27]] = !{!"p1 _ZTS2S1", [[META9]], i64 0}
// DEFAULT: [[TBAA28]] = !{[[META29:![0-9]+]], [[META29]], i64 0}
// DEFAULT: [[META29]] = !{!"p1 _ZTS2S2", [[META9]], i64 0}
// DEFAULT: [[TBAA30]] = !{[[META31:![0-9]+]], [[META27]], i64 0}
// DEFAULT: [[META31]] = !{!"S2", [[META27]], i64 0}
// DEFAULT: [[TBAA32]] = !{[[META9]], [[META9]], i64 0}
// DEFAULT: [[TBAA33]] = !{[[META34:![0-9]+]], [[META3]], i64 0}
// DEFAULT: [[META34]] = !{!"", [[META3]], i64 0}
// DEFAULT: [[TBAA35]] = !{[[META8]], [[META8]], i64 0}
//.
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