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TheRock/compiler/amd-llvm/clang/test/CodeGen/catch-nullptr-and-nonzero-offset-in-offsetof-idiom.c
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37 lines
1.0 KiB
C

// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
// RUN: %clang_cc1 -x c -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
// RUN: %clang_cc1 -x c -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
// RUN: %clang_cc1 -x c++ -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
// RUN: %clang_cc1 -x c++ -fsanitize=pointer-overflow -fno-sanitize-recover=pointer-overflow -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
struct S {
int x, y;
};
// CHECK-LABEL: @get_offset_of_y_naively(
// CHECK-NEXT: entry:
// CHECK-NEXT: ret i64 4
//
uintptr_t get_offset_of_y_naively(void) {
return ((uintptr_t)(&(((struct S *)0)->y)));
}
// CHECK-LABEL: @get_offset_of_y_via_builtin(
// CHECK-NEXT: entry:
// CHECK-NEXT: ret i64 4
//
uintptr_t get_offset_of_y_via_builtin(void) {
return __builtin_offsetof(struct S, y);
}
#ifdef __cplusplus
}
#endif