diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/warn/Wconversion3.C')
| -rw-r--r-- | gcc/testsuite/g++.dg/warn/Wconversion3.C | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Wconversion3.C b/gcc/testsuite/g++.dg/warn/Wconversion3.C new file mode 100644 index 000000000..24202b7d9 --- /dev/null +++ b/gcc/testsuite/g++.dg/warn/Wconversion3.C @@ -0,0 +1,35 @@ +// PR c++/34198 +// { dg-do compile } +// { dg-options "-O2 -Wconversion -Wsign-conversion" } + +signed char sc; +unsigned char uc; +short int ss; +unsigned short int us; +int si; +unsigned int ui; + +void test1 (void) +{ + int a = uc & 0xff; + int b = sc & 0x7f; + int c = 0xff & uc; + int d = 0x7f & sc; + int e = uc & sc; + unsigned char f = (int) uc; + signed char g = (int) sc; + unsigned char h = (unsigned int) (short int) uc; + signed char i = (int) (unsigned short int) sc; // { dg-warning "may alter its value" } + unsigned char j = (unsigned int) (short int) us; // { dg-warning "may alter its value" } + signed char k = (int) (unsigned short int) ss; // { dg-warning "may alter its value" } +} + +void test2 (void) +{ + signed char a = (unsigned char) sc; // { dg-warning "may change the sign" } + unsigned char b = (signed char) uc; // { dg-warning "may change the sign" } + signed char c = (int) (unsigned char) sc; // { dg-warning "may change the sign" } + unsigned char d = (int) (signed char) uc; // { dg-warning "may change the sign" } + int e = (unsigned int) si; // { dg-warning "may change the sign" } + unsigned int f = (int) ui; // { dg-warning "may change the sign" } +} |