420 lines
13 KiB
C
420 lines
13 KiB
C
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// RUN: %clang_cc1 -fsyntax-only -verify -Wconversion \
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// RUN: -nostdsysteminc -nobuiltininc -isystem %S/Inputs \
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// RUN: -triple x86_64-apple-darwin %s -Wno-unreachable-code
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#include <conversion.h>
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#define BIG 0x7f7f7f7f7f7f7f7fL
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void test0(char c, short s, int i, long l, long long ll) {
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c = c;
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c = s; // expected-warning {{implicit conversion loses integer precision}}
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c = i; // expected-warning {{implicit conversion loses integer precision}}
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c = l; // expected-warning {{implicit conversion loses integer precision}}
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s = c;
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s = s;
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s = i; // expected-warning {{implicit conversion loses integer precision}}
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s = l; // expected-warning {{implicit conversion loses integer precision}}
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i = c;
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i = s;
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i = i;
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i = l; // expected-warning {{implicit conversion loses integer precision}}
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l = c;
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l = s;
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l = i;
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l = l;
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c = (char) 0;
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c = (short) 0;
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c = (int) 0;
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c = (long) 0;
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s = (char) 0;
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s = (short) 0;
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s = (int) 0;
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s = (long) 0;
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i = (char) 0;
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i = (short) 0;
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i = (int) 0;
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i = (long) 0;
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l = (char) 0;
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l = (short) 0;
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l = (int) 0;
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l = (long) 0;
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c = (char) BIG;
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c = (short) BIG; // expected-warning {{implicit conversion from 'short' to 'char' changes value}}
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c = (int) BIG; // expected-warning {{implicit conversion from 'int' to 'char' changes value}}
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c = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'char' changes value}}
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s = (char) BIG;
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s = (short) BIG;
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s = (int) BIG; // expected-warning {{implicit conversion from 'int' to 'short' changes value}}
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s = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'short' changes value}}
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i = (char) BIG;
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i = (short) BIG;
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i = (int) BIG;
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i = (long) BIG; // expected-warning {{implicit conversion from 'long' to 'int' changes value}}
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l = (char) BIG;
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l = (short) BIG;
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l = (int) BIG;
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l = (long) BIG;
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}
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char test1(long long ll) {
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return (long long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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char test1_a(long long ll) {
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return (long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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char test1_b(long long ll) {
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return (int) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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char test1_c(long long ll) {
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return (short) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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char test1_d(long long ll) {
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return (char) ll;
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}
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char test1_e(long long ll) {
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return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'char' changes value}}
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}
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char test1_f(long long ll) {
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return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'char' changes value}}
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}
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char test1_g(long long ll) {
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return (int) BIG; // expected-warning {{implicit conversion from 'int' to 'char' changes value}}
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}
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char test1_h(long long ll) {
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return (short) BIG; // expected-warning {{implicit conversion from 'short' to 'char' changes value}}
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}
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char test1_i(long long ll) {
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return (char) BIG;
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}
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short test2(long long ll) {
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return (long long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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short test2_a(long long ll) {
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return (long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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short test2_b(long long ll) {
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return (int) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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short test2_c(long long ll) {
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return (short) ll;
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}
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short test2_d(long long ll) {
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return (char) ll;
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}
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short test2_e(long long ll) {
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return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'short' changes value}}
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}
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short test2_f(long long ll) {
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return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'short' changes value}}
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}
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short test2_g(long long ll) {
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return (int) BIG; // expected-warning {{implicit conversion from 'int' to 'short' changes value}}
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}
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short test2_h(long long ll) {
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return (short) BIG;
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}
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short test2_i(long long ll) {
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return (char) BIG;
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}
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int test3(long long ll) {
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return (long long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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int test3_b(long long ll) {
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return (long) ll; // expected-warning {{implicit conversion loses integer precision}}
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}
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int test3_c(long long ll) {
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return (int) ll;
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}
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int test3_d(long long ll) {
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return (short) ll;
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}
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int test3_e(long long ll) {
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return (char) ll;
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}
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int test3_f(long long ll) {
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return (long long) BIG; // expected-warning {{implicit conversion from 'long long' to 'int' changes value}}
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}
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int test3_g(long long ll) {
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return (long) BIG; // expected-warning {{implicit conversion from 'long' to 'int' changes value}}
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}
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int test3_h(long long ll) {
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return (int) BIG;
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}
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int test3_i(long long ll) {
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return (short) BIG;
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}
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int test3_j(long long ll) {
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return (char) BIG;
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}
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long test4(long long ll) {
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return (long long) ll;
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}
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long test4_a(long long ll) {
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return (long) ll;
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}
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long test4_b(long long ll) {
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return (int) ll;
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}
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long test4_c(long long ll) {
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return (short) ll;
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}
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long test4_d(long long ll) {
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return (char) ll;
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}
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long test4_e(long long ll) {
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return (long long) BIG;
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}
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long test4_f(long long ll) {
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return (long) BIG;
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}
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long test4_g(long long ll) {
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return (int) BIG;
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}
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long test4_h(long long ll) {
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return (short) BIG;
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}
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long test4_i(long long ll) {
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return (char) BIG;
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}
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long long test5(long long ll) {
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return (long long) ll;
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return (long) ll;
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return (int) ll;
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return (short) ll;
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return (char) ll;
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return (long long) BIG;
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return (long) BIG;
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return (int) BIG;
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return (short) BIG;
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return (char) BIG;
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}
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void takes_char(char);
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void takes_short(short);
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void takes_int(int);
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void takes_long(long);
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void takes_longlong(long long);
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void takes_float(float);
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void takes_double(double);
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void takes_longdouble(long double);
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void test6(char v) {
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takes_char(v);
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takes_short(v);
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takes_int(v);
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takes_long(v);
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takes_longlong(v);
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test7(short v) {
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takes_char(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_short(v);
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takes_int(v);
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takes_long(v);
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takes_longlong(v);
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test8(int v) {
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takes_char(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_short(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_int(v);
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takes_long(v);
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takes_longlong(v);
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test9(long v) {
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takes_char(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_short(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_int(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_long(v);
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takes_longlong(v);
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test10(long long v) {
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takes_char(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_short(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_int(v); // expected-warning {{implicit conversion loses integer precision}}
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takes_long(v);
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takes_longlong(v);
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test11(float v) {
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takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_float(v);
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takes_double(v);
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takes_longdouble(v);
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}
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void test12(double v) {
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takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_float(v); // expected-warning {{implicit conversion loses floating-point precision}}
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takes_double(v);
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takes_longdouble(v);
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}
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void test13(long double v) {
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takes_char(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_short(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_int(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_long(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_longlong(v); // expected-warning {{implicit conversion turns floating-point number into integer}}
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takes_float(v); // expected-warning {{implicit conversion loses floating-point precision}}
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takes_double(v); // expected-warning {{implicit conversion loses floating-point precision}}
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takes_longdouble(v);
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}
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void test14(long l) {
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// Fine because of the boolean whitelist.
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char c;
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c = (l == 4);
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c = ((l <= 4) && (l >= 0));
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c = ((l <= 4) && (l >= 0)) || (l > 20);
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}
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void test15(char c) {
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c = c + 1 + c * 2;
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c = (short) c + 1 + c * 2; // expected-warning {{implicit conversion loses integer precision}}
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}
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// PR 5422
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extern void *test16_external;
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void test16(void) {
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int a = (unsigned long) &test16_external; // expected-warning {{implicit conversion loses integer precision}}
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}
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// PR 5938
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void test17() {
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union {
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unsigned long long a : 8;
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unsigned long long b : 32;
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unsigned long long c;
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} U;
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unsigned int x;
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x = U.a;
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x = U.b;
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x = U.c; // expected-warning {{implicit conversion loses integer precision}}
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}
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// PR 5939
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void test18() {
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union {
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unsigned long long a : 1;
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unsigned long long b;
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} U;
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int x;
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x = (U.a ? 0 : 1);
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x = (U.b ? 0 : 1);
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}
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// None of these should warn.
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unsigned char test19(unsigned long u64) {
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unsigned char x1 = u64 & 0xff;
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unsigned char x2 = u64 >> 56;
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unsigned char mask = 0xee;
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unsigned char x3 = u64 & mask;
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return x1 + x2 + x3;
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}
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// <rdar://problem/7631400>
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void test_7631400(void) {
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// This should show up despite the caret being inside a macro substitution
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char s = LONG_MAX; // expected-warning {{implicit conversion from 'long' to 'char' changes value}}
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}
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// <rdar://problem/7676608>: assertion for compound operators with non-integral RHS
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void f7676608(int);
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void test_7676608(void) {
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float q = 0.7f;
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char c = 5;
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f7676608(c *= q);
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}
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// <rdar://problem/7904686>
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void test_7904686(void) {
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const int i = -1;
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unsigned u1 = i; // expected-warning {{implicit conversion changes signedness}}
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u1 = i; // expected-warning {{implicit conversion changes signedness}}
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unsigned u2 = -1; // expected-warning {{implicit conversion changes signedness}}
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u2 = -1; // expected-warning {{implicit conversion changes signedness}}
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}
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// <rdar://problem/8232669>: don't warn about conversions required by
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// contexts in system headers
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void test_8232669(void) {
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unsigned bitset[20];
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SETBIT(bitset, 0);
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unsigned y = 50;
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SETBIT(bitset, y);
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#define USER_SETBIT(set,bit) do { int i = bit; set[i/(8*sizeof(set[0]))] |= (1 << (i%(8*sizeof(set)))); } while(0)
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USER_SETBIT(bitset, 0); // expected-warning 2 {{implicit conversion changes signedness}}
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}
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// <rdar://problem/8559831>
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enum E8559831a { E8559831a_val };
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enum E8559831b { E8559831b_val };
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typedef enum { E8559831c_val } E8559831c;
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enum { E8559831d_val } value_d;
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void test_8559831_a(enum E8559831a value);
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void test_8559831(enum E8559831b value_a, E8559831c value_c) {
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test_8559831_a(value_a); // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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enum E8559831a a1 = value_a; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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a1 = value_a; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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test_8559831_a(E8559831b_val); // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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enum E8559831a a1a = E8559831b_val; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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a1 = E8559831b_val; // expected-warning{{implicit conversion from enumeration type 'enum E8559831b' to different enumeration type 'enum E8559831a'}}
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test_8559831_a(value_c); // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}}
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enum E8559831a a2 = value_c; // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}}
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a2 = value_c; // expected-warning{{implicit conversion from enumeration type 'E8559831c' to different enumeration type 'enum E8559831a'}}
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test_8559831_a(value_d);
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enum E8559831a a3 = value_d;
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a3 = value_d;
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}
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void test26(int si, long sl) {
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si = sl % sl; // expected-warning {{implicit conversion loses integer precision: 'long' to 'int'}}
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si = sl % si;
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si = si % sl;
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||
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si = si / sl;
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||
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si = sl / si; // expected-warning {{implicit conversion loses integer precision: 'long' to 'int'}}
|
||
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|
}
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