File: assuming-unsigned-ge-0.c

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llvm-toolchain-19 1%3A19.1.7-3
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// 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;
}