clang/test/Analysis/copypaste/functions.cpp

   1 // RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=alpha.clone.CloneChecker -analyzer-config alpha.clone.CloneChecker:MinimumCloneComplexity=10 -verify %s
   2
   3 // This tests if we search for clones in functions.
   4
   5 void log();
   6
   7 int max(int a, int b) { // expected-warning{{Duplicate code detected}}
   8   log();
   9   if (a > b)
  10     return a;
  11   return b;
  12 }
  13
  14 int maxClone(int x, int y) { // expected-note{{Similar code here}}
  15   log();
  16   if (x > y)
  17     return x;
  18   return y;
  19 }
  20
  21 // Functions below are not clones and should not be reported.
  22
  23 // The next two functions test that statement classes are still respected when
  24 // checking for clones in expressions. This will show that the statement
  25 // specific data of all base classes is collected, and not just the data of the
  26 // first base class.
  27 int testBaseClass(int a, int b) { // no-warning
  28   log();
  29   if (a > b)
  30     return true ? a : b;
  31   return b;
  32 }
  33 int testBaseClass2(int a, int b) { // no-warning
  34   log();
  35   if (a > b)
  36     return __builtin_choose_expr(true, a, b);
  37   return b;
  38 }
  39
  40 // No clone because of the different comparison operator.
  41 int min1(int a, int b) { // no-warning
  42   log();
  43   if (a < b)
  44     return a;
  45   return b;
  46 }
  47
  48 // No clone because of the different pattern in which the variables are used.
  49 int min2(int a, int b) { // no-warning
  50   log();
  51   if (a > b)
  52     return b;
  53   return a;
  54 }
  55
  56 int foo(int a, int b) { // no-warning
  57   return a + b;
  58 }