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