clang/test/Analysis/copypaste/macros.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 // Tests that macros and non-macro clones aren't mixed into the same hash
   4 // group. This is currently necessary as all clones in a hash group need
   5 // to have the same complexity value. Macros have smaller complexity values
   6 // and need to be in their own hash group.
   7
   8 int foo(int a) { // expected-warning{{Duplicate code detected}}
   9   a = a + 1;
  10   a = a + 1 / 1;
  11   a = a + 1 + 1 + 1;
  12   a = a + 1 - 1 + 1 + 1;
  13   a = a + 1 * 1 + 1 + 1 + 1;
  14   a = a + 1 / 1 + 1 + 1 + 1;
  15   return a;
  16 }
  17
  18 int fooClone(int a) { // expected-note{{Similar code here}}
  19   a = a + 1;
  20   a = a + 1 / 1;
  21   a = a + 1 + 1 + 1;
  22   a = a + 1 - 1 + 1 + 1;
  23   a = a + 1 * 1 + 1 + 1 + 1;
  24   a = a + 1 / 1 + 1 + 1 + 1;
  25   return a;
  26 }
  27
  28 // Below is the same AST as above but this time generated with macros. The
  29 // clones below should land in their own hash group for the reasons given above.
  30
  31 #define ASSIGN(T, V) T = T + V
  32
  33 int macro(int a) { // expected-warning{{Duplicate code detected}}
  34   ASSIGN(a, 1);
  35   ASSIGN(a, 1 / 1);
  36   ASSIGN(a, 1 + 1 + 1);
  37   ASSIGN(a, 1 - 1 + 1 + 1);
  38   ASSIGN(a, 1 * 1 + 1 + 1 + 1);
  39   ASSIGN(a, 1 / 1 + 1 + 1 + 1);
  40   return a;
  41 }
  42
  43 int macroClone(int a) { // expected-note{{Similar code here}}
  44   ASSIGN(a, 1);
  45   ASSIGN(a, 1 / 1);
  46   ASSIGN(a, 1 + 1 + 1);
  47   ASSIGN(a, 1 - 1 + 1 + 1);
  48   ASSIGN(a, 1 * 1 + 1 + 1 + 1);
  49   ASSIGN(a, 1 / 1 + 1 + 1 + 1);
  50   return a;
  51 }
  52
  53 // FIXME: Macros with empty definitions in the AST are currently ignored.
  54
  55 #define EMPTY
  56
  57 int fooFalsePositiveClone(int a) { // expected-note{{Similar code here}}
  58   a = EMPTY a + 1;
  59   a = a + 1 / 1;
  60   a = a + 1 + 1 + 1;
  61   a = a + 1 - 1 + 1 + 1;
  62   a = a + 1 * 1 + 1 + 1 + 1;
  63   a = a + 1 / 1 + 1 + 1 + 1;
  64   return a;
  65 }
  66
  67