| // RUN: %check_clang_tidy -check-suffixes=ALL,C -std=c99 %s bugprone-implicit-widening-of-multiplication-result %t -- -- -target x86_64-unknown-unknown -x c |
| // RUN: %check_clang_tidy -check-suffixes=ALL,CXX %s bugprone-implicit-widening-of-multiplication-result %t -- -- -target x86_64-unknown-unknown -x c++ |
| |
| // RUN: %check_clang_tidy -check-suffixes=ALL,C -std=c99 %s bugprone-implicit-widening-of-multiplication-result %t -- \ |
| // RUN: -config='{CheckOptions: [ \ |
| // RUN: {key: bugprone-implicit-widening-of-multiplication-result.UseCXXStaticCastsInCppSources, value: false} \ |
| // RUN: ]}' -- -target x86_64-unknown-unknown -x c |
| // RUN: %check_clang_tidy -check-suffixes=ALL,C %s bugprone-implicit-widening-of-multiplication-result %t -- \ |
| // RUN: -config='{CheckOptions: [ \ |
| // RUN: {key: bugprone-implicit-widening-of-multiplication-result.UseCXXStaticCastsInCppSources, value: false} \ |
| // RUN: ]}' -- -target x86_64-unknown-unknown -x c++ |
| |
| char *t0(char *base, int a, int b) { |
| return &base[a * b]; |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:11: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:16: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-C: (ptrdiff_t)( ) |
| // CHECK-NOTES-CXX: static_cast<ptrdiff_t>( ) |
| // CHECK-NOTES-ALL: :[[@LINE-5]]:16: note: perform multiplication in a wider type |
| // CHECK-NOTES-C: (ptrdiff_t) |
| // CHECK-NOTES-CXX: static_cast<ptrdiff_t>() |
| } |
| void *t1(char *base, int a, int b) { |
| return &((a * b)[base]); |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:12: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:13: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-ALL: :[[@LINE-3]]:13: note: perform multiplication in a wider type |
| } |
| |
| char *t2(char *base, unsigned int a, int b) { |
| return &base[a * b]; |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:11: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:16: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-C: (size_t) |
| // CHECK-NOTES-CXX: static_cast<size_t>( ) |
| // CHECK-NOTES-ALL: :[[@LINE-5]]:16: note: perform multiplication in a wider type |
| // CHECK-NOTES-C: (size_t) |
| // CHECK-NOTES-CXX: static_cast<size_t>() |
| } |
| |
| char *t3(char *base, int a, unsigned int b) { |
| return &base[a * b]; |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:11: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:16: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-ALL: :[[@LINE-3]]:16: note: perform multiplication in a wider type |
| } |
| |
| char *t4(char *base, unsigned int a, unsigned int b) { |
| return &base[a * b]; |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:11: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:16: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-ALL: :[[@LINE-3]]:16: note: perform multiplication in a wider type |
| } |
| |
| char *n5(char *base, int a, int b, int c) { |
| return &base[a * b + c]; |
| } |
| char *n6(char *base, int a, int b, int c) { |
| return &base[a + b * c]; |
| } |
| |
| char *t7(char *base, int a, int b) { |
| return &base[(a * b)]; |
| // CHECK-NOTES-ALL: :[[@LINE-1]]:11: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t' |
| // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning |
| // CHECK-NOTES-ALL: :[[@LINE-3]]:17: note: perform multiplication in a wider type |
| } |
| char *n8(char *base, int a, int b, int c) { |
| return &base[(a * b + c)]; |
| } |
| char *n9(char *base, int a, int b, int c) { |
| return &base[(a * b) + c]; |
| } |
| |
| char *n10(char *base, int a, int b) { |
| return &base[(long)(a * b)]; |
| } |
| char *n11(char *base, int a, int b) { |
| return &base[(unsigned long)(a * b)]; |
| } |
| |
| #ifdef __cplusplus |
| template <typename T> |
| char *template_test(char *base, T a, T b) { |
| return &base[a * b]; |
| } |
| char *template_test_instantiation(char *base, int a, int b) { |
| return template_test(base, a, b); |
| } |
| #endif |