100 lines · cpp
1// RUN: %check_clang_tidy -check-suffixes=ALL,C -std=c99 %s bugprone-implicit-widening-of-multiplication-result %t -- -- -target x86_64-unknown-unknown -x c2// RUN: %check_clang_tidy -check-suffixes=ALL,CXX %s bugprone-implicit-widening-of-multiplication-result %t -- -- -target x86_64-unknown-unknown -x c++3 4// RUN: %check_clang_tidy -check-suffixes=ALL,C -std=c99 %s bugprone-implicit-widening-of-multiplication-result %t -- \5// RUN: -config='{CheckOptions: { \6// RUN: bugprone-implicit-widening-of-multiplication-result.UseCXXStaticCastsInCppSources: false \7// RUN: }}' -- -target x86_64-unknown-unknown -x c8// RUN: %check_clang_tidy -check-suffixes=ALL,C %s bugprone-implicit-widening-of-multiplication-result %t -- \9// RUN: -config='{CheckOptions: { \10// RUN: bugprone-implicit-widening-of-multiplication-result.UseCXXStaticCastsInCppSources: false \11// RUN: }}' -- -target x86_64-unknown-unknown -x c++12 13char *t0(char *base, int a, int b) {14 return base + a * b;15 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'16 // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning17 // CHECK-NOTES-C: (ptrdiff_t)( )18 // CHECK-NOTES-CXX: static_cast<ptrdiff_t>( )19 // CHECK-NOTES-ALL: :[[@LINE-5]]:17: note: perform multiplication in a wider type20 // CHECK-NOTES-C: (ptrdiff_t)21 // CHECK-NOTES-CXX: static_cast<ptrdiff_t>( )22}23char *t1(char *base, int a, int b) {24 return a * b + base;25 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'26 // CHECK-NOTES-ALL: :[[@LINE-2]]:10: note: make conversion explicit to silence this warning27 // CHECK-NOTES-ALL: :[[@LINE-3]]:10: note: perform multiplication in a wider type28}29 30char *t2(char *base, unsigned int a, int b) {31 return base + a * b;32 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t'33 // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning34 // CHECK-NOTES-C: (size_t)( )35 // CHECK-NOTES-CXX: static_cast<size_t>( )36 // CHECK-NOTES-ALL: :[[@LINE-5]]:17: note: perform multiplication in a wider type37 // CHECK-NOTES-C: (size_t)38 // CHECK-NOTES-CXX: static_cast<size_t>( )39}40 41char *t3(char *base, int a, unsigned int b) {42 return base + a * b;43 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t'44 // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning45 // CHECK-NOTES-ALL: :[[@LINE-3]]:17: note: perform multiplication in a wider type46}47 48char *t4(char *base, unsigned int a, unsigned int b) {49 return base + a * b;50 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'unsigned int' is used as a pointer offset after an implicit widening conversion to type 'size_t'51 // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning52 // CHECK-NOTES-ALL: :[[@LINE-3]]:17: note: perform multiplication in a wider type53}54 55char *t5(char *base, int a, int b, int c) {56 return base + a * b + c;57 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'58 // CHECK-NOTES-ALL: :[[@LINE-2]]:17: note: make conversion explicit to silence this warning59 // CHECK-NOTES-ALL: :[[@LINE-3]]:17: note: perform multiplication in a wider type60}61char *t6(char *base, int a, int b, int c) {62 return base + a + b * c;63 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'64 // CHECK-NOTES-ALL: :[[@LINE-2]]:21: note: make conversion explicit to silence this warning65 // CHECK-NOTES-ALL: :[[@LINE-3]]:21: note: perform multiplication in a wider type66}67 68char *n7(char *base, int a, int b) {69 return base + (a * b);70 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'71 // CHECK-NOTES-ALL: :[[@LINE-2]]:18: note: make conversion explicit to silence this warning72 // CHECK-NOTES-ALL: :[[@LINE-3]]:18: note: perform multiplication in a wider type73}74char *n8(char *base, int a, int b, int c) {75 return base + (a * b) + c;76 // CHECK-NOTES-ALL: :[[@LINE-1]]:10: warning: result of multiplication in type 'int' is used as a pointer offset after an implicit widening conversion to type 'ptrdiff_t'77 // CHECK-NOTES-ALL: :[[@LINE-2]]:18: note: make conversion explicit to silence this warning78 // CHECK-NOTES-ALL: :[[@LINE-3]]:18: note: perform multiplication in a wider type79}80char *n9(char *base, int a, int b, int c) {81 return base + (a * b + c);82}83 84char *n10(char *base, int a, int b) {85 return base + (long)(a * b);86}87char *n11(char *base, int a, int b) {88 return base + (unsigned long)(a * b);89}90 91#ifdef __cplusplus92template <typename T>93char *template_test(char *base, T a, T b) {94 return base + a * b;95}96char *template_test_instantiation(char *base, int a, int b) {97 return template_test(base, a, b);98}99#endif100