forked from OSchip/llvm-project
102 lines
3.1 KiB
C++
102 lines
3.1 KiB
C++
// RUN: %check_clang_tidy %s misc-misplaced-widening-cast %t -- -config="{CheckOptions: [{key: misc-misplaced-widening-cast.CheckImplicitCasts, value: 1}]}" --
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void func(long arg) {}
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void assign(int a, int b) {
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long l;
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l = a * b;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long' is ineffective, or there is loss of precision before the conversion [misc-misplaced-widening-cast]
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l = (long)(a * b);
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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l = (long)a * b;
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l = a << 8;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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l = (long)(a << 8);
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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l = (long)b << 8;
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l = static_cast<long>(a * b);
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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}
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void compare(int a, int b, long c) {
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bool l;
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l = a * b == c;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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l = c == a * b;
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// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: either cast from 'int' to 'long'
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l = (long)(a * b) == c;
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// CHECK-MESSAGES: :[[@LINE-1]]:7: warning: either cast from 'int' to 'long'
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l = c == (long)(a * b);
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// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: either cast from 'int' to 'long'
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l = (long)a * b == c;
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l = c == (long)a * b;
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}
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void init(unsigned int n) {
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long l1 = n << 8;
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// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: either cast from 'unsigned int' to 'long'
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long l2 = (long)(n << 8);
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// CHECK-MESSAGES: :[[@LINE-1]]:13: warning: either cast from 'unsigned int' to 'long'
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long l3 = (long)n << 8;
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}
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void call(unsigned int n) {
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func(n << 8);
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: either cast from 'unsigned int' to 'long'
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func((long)(n << 8));
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// CHECK-MESSAGES: :[[@LINE-1]]:8: warning: either cast from 'unsigned int' to 'long'
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func((long)n << 8);
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}
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long ret(int a) {
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if (a < 0) {
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return a * 1000;
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// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: either cast from 'int' to 'long'
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} else if (a > 0) {
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return (long)(a * 1000);
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// CHECK-MESSAGES: :[[@LINE-1]]:12: warning: either cast from 'int' to 'long'
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} else {
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return (long)a * 1000;
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}
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}
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void dontwarn1(unsigned char a, int i, unsigned char *p) {
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long l;
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// The result is a 9 bit value, there is no truncation in the implicit cast.
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l = (long)(a + 15);
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// The result is a 12 bit value, there is no truncation in the implicit cast.
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l = (long)(a << 4);
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// The result is a 3 bit value, there is no truncation in the implicit cast.
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l = (long)((i % 5) + 1);
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// The result is a 16 bit value, there is no truncation in the implicit cast.
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l = (long)(((*p) << 8) + *(p + 1));
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}
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template <class T> struct DontWarn2 {
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void assign(T a, T b) {
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long l;
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l = (long)(a * b);
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}
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};
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DontWarn2<int> DW2;
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// Cast is not suspicious when casting macro.
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#define A (X<<2)
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long macro1(int X) {
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return (long)A;
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}
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// Don't warn about cast in macro.
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#define B(X,Y) (long)(X*Y)
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long macro2(int x, int y) {
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return B(x,y);
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}
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void floatingpoint(float a, float b) {
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double d = (double)(a * b); // Currently we don't warn for this.
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}
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