llvm-project/clang/test/Sema/format-strings-bitfield-promotion.c
Aaron Ballman 8c5edb59cf Use functions with prototypes when appropriate; NFC
A significant number of our tests in C accidentally use functions
without prototypes. This patch converts the function signatures to have
a prototype for the situations where the test is not specific to K&R C
declarations. e.g.,

  void func();

becomes

  void func(void);

This is the second batch of tests being updated (there are a significant
number of other tests left to be updated).
2022-02-04 15:20:36 -05:00

19 lines
862 B
C

// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -verify %s
// RUN: %clang_cc1 -triple x86_64-unknown-windows-msvc -fsyntax-only -verify %s
int printf(const char *restrict, ...);
struct bitfields {
long a : 2;
unsigned long b : 2;
long c : 32; // assumes that int is 32 bits
unsigned long d : 32; // assumes that int is 32 bits
} bf;
void bitfield_promotion(void) {
printf("%ld", bf.a); // expected-warning {{format specifies type 'long' but the argument has type 'int'}}
printf("%lu", bf.b); // expected-warning {{format specifies type 'unsigned long' but the argument has type 'int'}}
printf("%ld", bf.c); // expected-warning {{format specifies type 'long' but the argument has type 'int'}}
printf("%lu", bf.d); // expected-warning {{format specifies type 'unsigned long' but the argument has type 'unsigned int'}}
}