TheRock/compiler/amd-llvm/clang/test/Analysis/assuming-unsigned-ge-0.c

// RUN: %clang_analyze_cc1 -analyzer-output=text        \
// RUN:     -analyzer-checker=core -verify %s

int assuming_unsigned_ge_0(unsigned arg) {
  // TODO This testcase demonstrates the current incorrect behavior of Clang
  // Static Analyzer: here 'arg' is unsigned, so "arg >= 0" is not a fresh
  // assumption, but it still appears in the diagnostics as if it's fresh:
  // expected-note@+2 {{Assuming 'arg' is >= 0}}
  // expected-note@+1 {{Taking false branch}}
  if (arg < 0)
    return 0;
  // expected-note@+2 {{Assuming 'arg' is <= 0}}
  // expected-note@+1 {{Taking false branch}}
  if (arg > 0)
    return 0;
  // expected-note@+2 {{Division by zero}}
  // expected-warning@+1 {{Division by zero}}
  return 100 / arg;
}