clang/test/Analysis/conversion-tracking-notes.c

   1 // RUN: %clang_analyze_cc1 %s \
   2 // RUN:   -Wno-conversion -Wno-tautological-constant-compare \
   3 // RUN:   -analyzer-checker=core,apiModeling,alpha.core.Conversion \
   4 // RUN:   -analyzer-output=text \
   5 // RUN:   -verify
   6
   7 unsigned char U8;
   8 signed char S8;
   9
  10 void track_assign(void) {
  11   unsigned long L = 1000; // expected-note {{'L' initialized to 1000}}
  12   int I = -1;             // expected-note {{'I' initialized to -1}}
  13   U8 *= L; // expected-warning {{Loss of precision in implicit conversion}}
  14            // expected-note@-1 {{Loss of precision in implicit conversion}}
  15   L *= I;  // expected-warning {{Loss of sign in implicit conversion}}
  16            // expected-note@-1 {{Loss of sign in implicit conversion}}
  17 }
  18
  19 void track_relational(unsigned U, signed S) {
  20   if (S < -10) { // expected-note    {{Taking true branch}}
  21                  // expected-note@-1 {{Assuming the condition is true}}
  22     if (U < S) { // expected-warning {{Loss of sign in implicit conversion}}
  23                  // expected-note@-1 {{Loss of sign in implicit conversion}}
  24     }
  25   }
  26 }