File: builtin-assume.c

package info (click to toggle)
llvm-toolchain-3.7 1%3A3.7.1-5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 345,556 kB
  • ctags: 362,199
  • sloc: cpp: 2,156,381; ansic: 458,339; objc: 91,547; python: 89,988; asm: 86,305; sh: 21,479; makefile: 6,853; perl: 5,601; ml: 5,458; pascal: 3,933; lisp: 2,429; xml: 686; cs: 239; php: 202; csh: 117
file content (30 lines) | stat: -rw-r--r-- 1,383 bytes parent folder | download | duplicates (16)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
// RUN: %clang_cc1 -triple i386-mingw32 -fms-extensions -fsyntax-only -verify %s
// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -verify %s

int nonconst(void);
int isconst(void) __attribute__((const));
int ispure(int) __attribute__((pure));

int foo(int *a, int i) {
#ifdef _MSC_VER
  __assume(i != 4);
  __assume(++i > 2); //expected-warning {{the argument to '__assume' has side effects that will be discarded}}
  __assume(nonconst() > 2); //expected-warning {{the argument to '__assume' has side effects that will be discarded}}
  __assume(isconst() > 2);
  __assume(ispure(i) > 2);
  __assume(ispure(++i) > 2); //expected-warning {{the argument to '__assume' has side effects that will be discarded}}

  int test = sizeof(struct{char qq[(__assume(i != 5), 7)];});
#else
  __builtin_assume(i != 4);
  __builtin_assume(++i > 2); //expected-warning {{the argument to '__builtin_assume' has side effects that will be discarded}}
  __builtin_assume(nonconst() > 2); //expected-warning {{the argument to '__builtin_assume' has side effects that will be discarded}}
  __builtin_assume(isconst() > 2);
  __builtin_assume(ispure(i) > 2);
  __builtin_assume(ispure(++i) > 2); //expected-warning {{the argument to '__builtin_assume' has side effects that will be discarded}}
  
  int test = sizeof(struct{char qq[(__builtin_assume(i != 5), 7)];});
#endif
  return a[i];
}