| // 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 |
| |
| #include <stdint.h> |
| |
| struct S { |
| int x, y; |
| }; |
| |
| // CHECK-LABEL: @_Z23get_offset_of_y_naivelyv( |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: ret i64 ptrtoint (i32* getelementptr inbounds ([[STRUCT_S:%.*]], %struct.S* null, i32 0, i32 1) to i64) |
| // |
| uintptr_t get_offset_of_y_naively() { |
| return ((uintptr_t)(&(((S *)nullptr)->y))); |
| } |
| |
| // CHECK-LABEL: @_Z27get_offset_of_y_via_builtinv( |
| // CHECK-NEXT: entry: |
| // CHECK-NEXT: ret i64 4 |
| // |
| uintptr_t get_offset_of_y_via_builtin() { |
| return __builtin_offsetof(S, y); |
| } |
