clang/test/Parser/pragma-unroll.cpp

   1 // RUN: %clang_cc1 -std=c++11 -verify %s
   2
   3 // Note that this puts the expected lines before the directives to work around
   4 // limitations in the -verify mode.
   5
   6 void test(int *List, int Length) {
   7   int i = 0;
   8
   9 #pragma unroll
  10   while (i + 1 < Length) {
  11     List[i] = i;
  12   }
  13
  14 #pragma nounroll
  15   while (i < Length) {
  16     List[i] = i;
  17   }
  18
  19 #pragma unroll 4
  20   while (i - 1 < Length) {
  21     List[i] = i;
  22   }
  23
  24 #pragma unroll(8)
  25   while (i - 2 < Length) {
  26     List[i] = i;
  27   }
  28
  29 /* expected-error {{expected ')'}} */ #pragma unroll(4
  30 /* expected-error {{missing argument; expected an integer value}} */ #pragma unroll()
  31 /* expected-warning {{extra tokens at end of '#pragma unroll'}} */ #pragma unroll 1 2
  32   while (i-6 < Length) {
  33     List[i] = i;
  34   }
  35
  36 /* expected-warning {{extra tokens at end of '#pragma nounroll'}} */ #pragma nounroll 1
  37   while (i-7 < Length) {
  38     List[i] = i;
  39   }
  40
  41 /* expected-error {{expected ')'}} */ #pragma unroll(()
  42 /* expected-error {{expected expression}} */ #pragma unroll -
  43 /* expected-error {{invalid value '0'; must be positive}} */ #pragma unroll(0)
  44 /* expected-error {{invalid value '0'; must be positive}} */ #pragma unroll 0
  45 /* expected-error {{value '3000000000' is too large}} */ #pragma unroll(3000000000)
  46 /* expected-error {{value '3000000000' is too large}} */ #pragma unroll 3000000000
  47   while (i-8 < Length) {
  48     List[i] = i;
  49   }
  50
  51 #pragma unroll
  52 /* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ int j = Length;
  53 #pragma unroll 4
  54 /* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ int k = Length;
  55 #pragma nounroll
  56 /* expected-error {{expected a for, while, or do-while loop to follow '#pragma nounroll'}} */ int l = Length;
  57
  58   switch (i) {
  59   case 1:
  60 #pragma unroll
  61 /* expected-error {{expected a for, while, or do-while loop to follow '#pragma unroll'}} */ [[fallthrough]];
  62   case 2:
  63     for (int i = 0; i < 10; ++i);
  64     break;
  65   }
  66
  67 #pragma unroll 4
  68 /* expected-error {{incompatible directives 'unroll(disable)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(disable)
  69   while (i-10 < Length) {
  70     List[i] = i;
  71   }
  72
  73 #pragma unroll(4)
  74 /* expected-error {{incompatible directives 'unroll(full)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(full)
  75   while (i-11 < Length) {
  76     List[i] = i;
  77   }
  78
  79 #pragma unroll(4)
  80 /* expected-error {{incompatible directives 'unroll(enable)' and '#pragma unroll(4)'}} */ #pragma clang loop unroll(enable)
  81   while (i-11 < Length) {
  82     List[i] = i;
  83   }
  84
  85 #pragma unroll(4)
  86 /* expected-error {{incompatible directives '#pragma unroll' and '#pragma unroll(4)'}} */ #pragma unroll
  87   while (i-11 < Length) {
  88     List[i] = i;
  89   }
  90
  91 #pragma clang loop unroll_count(4)
  92 /* expected-error {{incompatible directives '#pragma nounroll' and 'unroll_count(4)'}} */ #pragma nounroll
  93   while (i-12 < Length) {
  94     List[i] = i;
  95   }
  96
  97 #pragma nounroll
  98 /* expected-error {{duplicate directives '#pragma nounroll' and '#pragma nounroll'}} */ #pragma nounroll
  99   while (i-13 < Length) {
 100     List[i] = i;
 101   }
 102
 103 #pragma unroll
 104 /* expected-error {{duplicate directives '#pragma unroll' and '#pragma unroll'}} */ #pragma unroll
 105   while (i-14 < Length) {
 106     List[i] = i;
 107   }
 108
 109 #pragma unroll
 110 /* expected-error {{duplicate directives '#pragma unroll' and 'unroll(full)'}} */ #pragma clang loop unroll(full)
 111   while (i-15 < Length) {
 112     List[i] = i;
 113   }
 114
 115 #pragma unroll 4
 116 /* expected-error {{duplicate directives '#pragma unroll(4)' and '#pragma unroll(4)'}} */ #pragma unroll(4)
 117   while (i-16 < Length) {
 118     List[i] = i;
 119   }
 120
 121 #pragma unroll
 122 /* expected-error {{expected statement}} */ }