1 // RUN: %clang_cc1 %s -verify -Wno-constant-conversion 2 // RUN: %clang_cc1 %s -verify -Wno-constant-conversion -Wno-implicit-int-float-conversion -Wimplicit-const-int-float-conversion 3 // RUN: %clang_cc1 %s -DNONCONST=1 -verify -Wno-constant-conversion -Wimplicit-int-float-conversion 4 5 #ifdef NONCONST 6 long testReturn(long a, float b) { 7 return a + b; // expected-warning {{implicit conversion from 'long' to 'float' may lose precision}} 8 } 9 #endif 10 11 void testAssignment(void) { 12 float f = 222222; 13 double b = 222222222222L; 14 15 float ff = 222222222222L; // expected-warning {{changes value from 222222222222 to 222222221312}} 16 float ffff = 222222222222UL; // expected-warning {{changes value from 222222222222 to 222222221312}} 17 18 long l = 222222222222L; 19 #ifdef NONCONST 20 float fff = l; // expected-warning {{implicit conversion from 'long' to 'float' may lose precision}} 21 #endif 22 } 23 24 void testExpression(void) { 25 float a = 0.0f; 26 27 float b = 222222222222L + a; // expected-warning {{changes value from 222222222222 to 222222221312}} 28 29 float g = 22222222 + 22222222; 30 float c = 22222222 + 22222223; // expected-warning {{implicit conversion from 'int' to 'float' changes value from 44444445 to 44444444}} 31 32 int i = 0; 33 #ifdef NONCONST 34 float d = i + a; // expected-warning {{implicit conversion from 'int' to 'float' may lose precision}} 35 #endif 36 37 double e = 0.0; 38 double f = i + e; 39 } 40 41 void testCNarrowing(void) { 42 // Since this is a C file. C++11 narrowing is not in effect. 43 // In this case, we should issue warnings. 44 float a = {222222222222L}; // expected-warning {{changes value from 222222222222 to 222222221312}} 45 46 long b = 222222222222L; 47 #ifdef NONCONST 48 float c = {b}; // expected-warning {{implicit conversion from 'long' to 'float' may lose precision}} 49 #endif 50 } 51