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// RUN: %clang -fstrict-flex-arrays=2 -target x86_64-apple-darwin -S -emit-llvm %s -o - 2>&1 | FileCheck --check-prefixes=CHECK,CHECK-STRICT-2 %s
// RUN: %clang -fstrict-flex-arrays=1 -target x86_64-apple-darwin -S -emit-llvm %s -o - 2>&1 | FileCheck --check-prefixes=CHECK,CHECK-STRICT-1 %s
// RUN: %clang -fstrict-flex-arrays=0 -target x86_64-apple-darwin -S -emit-llvm %s -o - 2>&1 | FileCheck --check-prefixes=CHECK,CHECK-STRICT-0 %s
#define OBJECT_SIZE_BUILTIN __builtin_object_size
typedef struct {
float f;
double c[];
} foo_t;
typedef struct {
float f;
double c[0];
} foo0_t;
typedef struct {
float f;
double c[1];
} foo1_t;
typedef struct {
float f;
double c[2];
} foo2_t;
// CHECK-LABEL: @bar
unsigned bar(foo_t *f) {
// CHECK-STRICT-0: ret i32 %
// CHECK-STRICT-1: ret i32 %
// CHECK-STRICT-2: ret i32 %
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// CHECK-LABEL: @bar0
unsigned bar0(foo0_t *f) {
// CHECK-STRICT-0: ret i32 %
// CHECK-STRICT-1: ret i32 %
// CHECK-STRICT-2: ret i32 %
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// CHECK-LABEL: @bar1
unsigned bar1(foo1_t *f) {
// CHECK-STRICT-0: ret i32 %
// CHECK-STRICT-1: ret i32 %
// CHECK-STRICT-2: ret i32 8
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// CHECK-LABEL: @bar2
unsigned bar2(foo2_t *f) {
// CHECK-STRICT-0: ret i32 %
// CHECK-STRICT-1: ret i32 16
// CHECK-STRICT-2: ret i32 16
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// Also checks for non-trailing flex-array like members
typedef struct {
double c[0];
float f;
} foofoo0_t;
typedef struct {
double c[1];
float f;
} foofoo1_t;
typedef struct {
double c[2];
float f;
} foofoo2_t;
// CHECK-LABEL: @babar0
unsigned babar0(foofoo0_t *f) {
// CHECK-STRICT-0: ret i32 0
// CHECK-STRICT-1: ret i32 0
// CHECK-STRICT-2: ret i32 0
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// CHECK-LABEL: @babar1
unsigned babar1(foofoo1_t *f) {
// CHECK-STRICT-0: ret i32 8
// CHECK-STRICT-1: ret i32 8
// CHECK-STRICT-2: ret i32 8
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
// CHECK-LABEL: @babar2
unsigned babar2(foofoo2_t *f) {
// CHECK-STRICT-0: ret i32 16
// CHECK-STRICT-1: ret i32 16
// CHECK-STRICT-2: ret i32 16
return OBJECT_SIZE_BUILTIN(f->c, 1);
}
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