File: conversion-tracking-notes.c

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (26 lines) | stat: -rw-r--r-- 1,059 bytes parent folder | download | duplicates (13) 
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
 
// RUN: %clang_analyze_cc1 %s \
// RUN:   -Wno-conversion -Wno-tautological-constant-compare \
// RUN:   -analyzer-checker=core,apiModeling,alpha.core.Conversion \
// RUN:   -analyzer-output=text \
// RUN:   -verify

unsigned char U8;
signed char S8;

void track_assign(void) {
  unsigned long L = 1000; // expected-note {{'L' initialized to 1000}}
  int I = -1;             // expected-note {{'I' initialized to -1}}
  U8 *= L; // expected-warning {{Loss of precision in implicit conversion}}
           // expected-note@-1 {{Loss of precision in implicit conversion}}
  L *= I;  // expected-warning {{Loss of sign in implicit conversion}}
           // expected-note@-1 {{Loss of sign in implicit conversion}}
}

void track_relational(unsigned U, signed S) {
  if (S < -10) { // expected-note    {{Taking true branch}}
                 // expected-note@-1 {{Assuming the condition is true}}
    if (U < S) { // expected-warning {{Loss of sign in implicit conversion}}
                 // expected-note@-1 {{Loss of sign in implicit conversion}}
    }
  }
}