flang/test/Evaluate/folding03.f90

   1 ! RUN: %python %S/test_folding.py %s %flang_fc1
   2 ! Test operation folding edge case (both expected value and messages)
   3 ! These tests make assumptions regarding real(4) and integer(4) extrema.
   4
   5 #define TEST_ISNAN(v) logical, parameter :: test_##v =.NOT.(v.EQ.v)
   6
   7 module integer_tests
   8   integer(4), parameter :: i4_pmax = 2147483647_4
   9   ! Fortran grammar rule R605 prevents from writing -2147483648_4 in an
  10   ! expression because literal-constant are not signed so this would parse
  11   ! to -(2147483648_4) and 2147483648_4 is not accepted as a literal-constant.
  12   ! However, one can reach this value with operations.
  13   integer(4), parameter :: i4_nmax = -2147483647_4 - 1_4
  14
  15   ! Integer division by zero are not tested here because they are handled as fatal
  16   ! errors in constants.
  17
  18   !WARN: warning: INTEGER(4) negation overflowed
  19   logical, parameter :: test_overflow_unary_minus1 = (-i4_nmax).EQ.i4_nmax
  20   logical, parameter :: test_no_overflow_unary_minus1 = (-i4_pmax).EQ.(i4_nmax+1_4)
  21   logical, parameter :: test_no_overflow_unary_plus1 = (+i4_pmax).EQ.i4_pmax
  22   logical, parameter :: test_no_overflow_unary_plus2 = (+i4_nmax).EQ.i4_nmax
  23
  24   !WARN: warning: INTEGER(4) addition overflowed
  25   logical, parameter :: test_overflow_add1 = (i4_pmax+1_4).EQ.i4_nmax
  26   !WARN: warning: INTEGER(4) addition overflowed
  27   logical, parameter :: test_overflow_add2 = (i4_nmax + (-1_4)).EQ.i4_pmax
  28   !WARN: warning: INTEGER(4) addition overflowed
  29   logical, parameter :: test_overflow_add3 = (i4_pmax + i4_pmax).EQ.(-2_4)
  30   !WARN: warning: INTEGER(4) addition overflowed
  31   logical, parameter :: test_overflow_add4 = (i4_nmax + i4_nmax).EQ.(0_4)
  32   logical, parameter :: test_no_overflow_add1 = (i4_pmax + 0_4).EQ.i4_pmax
  33   logical, parameter :: test_no_overflow_add2 = (i4_nmax + (-0_4)).EQ.i4_nmax
  34   logical, parameter :: test_no_overflow_add3 = (i4_pmax + i4_nmax).EQ.(-1_4)
  35   logical, parameter :: test_no_overflow_add4 = (i4_nmax + i4_pmax).EQ.(-1_4)
  36
  37   !WARN: warning: INTEGER(4) subtraction overflowed
  38   logical, parameter :: test_overflow_sub1 = (i4_nmax - 1_4).EQ.i4_pmax
  39   !WARN: warning: INTEGER(4) subtraction overflowed
  40   logical, parameter :: test_overflow_sub2 = (i4_pmax - (-1_4)).EQ.i4_nmax
  41   !WARN: warning: INTEGER(4) subtraction overflowed
  42   logical, parameter :: test_overflow_sub3 = (i4_nmax - i4_pmax).EQ.(1_4)
  43   !WARN: warning: INTEGER(4) subtraction overflowed
  44   logical, parameter :: test_overflow_sub4 = (i4_pmax - i4_nmax).EQ.(-1_4)
  45   logical, parameter :: test_no_overflow_sub1 = (i4_nmax - 0_4).EQ.i4_nmax
  46   logical, parameter :: test_no_overflow_sub2 = (i4_pmax - (-0_4)).EQ.i4_pmax
  47   logical, parameter :: test_no_overflow_sub3 = (i4_nmax - i4_nmax).EQ.0_4
  48   logical, parameter :: test_no_overflow_sub4 = (i4_pmax - i4_pmax).EQ.0_4
  49
  50
  51   !WARN: warning: INTEGER(4) multiplication overflowed
  52   logical, parameter :: test_overflow_mult1 = (i4_pmax*2_4).EQ.(-2_4)
  53   !WARN: warning: INTEGER(4) multiplication overflowed
  54   logical, parameter :: test_overflow_mult2 = (i4_nmax*2_4).EQ.(0_4)
  55   !WARN: warning: INTEGER(4) multiplication overflowed
  56   logical, parameter :: test_overflow_mult3 = (i4_nmax*i4_nmax).EQ.(0_4)
  57   !WARN: warning: INTEGER(4) multiplication overflowed
  58   logical, parameter :: test_overflow_mult4 = (i4_pmax*i4_pmax).EQ.(1_4)
  59
  60   !WARN: warning: INTEGER(4) division overflowed
  61   logical, parameter :: test_overflow_div1 = (i4_nmax/(-1_4)).EQ.(i4_nmax)
  62   logical, parameter :: test_no_overflow_div1 = (i4_nmax/(-2_4)).EQ.(1_4 + i4_pmax/2_4)
  63   logical, parameter :: test_no_overflow_div2 = (i4_nmax/i4_nmax).EQ.(1_4)
  64
  65   !WARN: warning: INTEGER(4) power overflowed
  66   logical, parameter :: test_overflow_pow1 = (i4_pmax**2_4).EQ.(1_4)
  67   !WARN: warning: INTEGER(4) power overflowed
  68   logical, parameter :: test_overflow_pow3 = (i4_nmax**2_4).EQ.(0_4)
  69   logical, parameter :: test_no_overflow_pow1 = ((-1_4)**i4_nmax).EQ.(1_4)
  70   logical, parameter :: test_no_overflow_pow2 = ((-1_4)**i4_pmax).EQ.(-1_4)
  71
  72 end module
  73
  74 module real_tests
  75   ! Test real(4) operation folding on edge cases (inf and NaN)
  76
  77   real(4), parameter :: r4_pmax = 3.4028235E38
  78   real(4), parameter :: r4_nmax = -3.4028235E38
  79   !WARN: warning: invalid argument on division
  80   real(4), parameter :: r4_nan = 0._4/0._4
  81   TEST_ISNAN(r4_nan)
  82   !WARN: warning: division by zero
  83   real(4), parameter :: r4_pinf = 1._4/0._4
  84   !WARN: warning: division by zero
  85   real(4), parameter :: r4_ninf = -1._4/0._4
  86
  87   logical, parameter :: test_r4_nan_parentheses1 = .NOT.(((r4_nan)).EQ.r4_nan)
  88   logical, parameter :: test_r4_nan_parentheses2 = .NOT.(((r4_nan)).NE.r4_nan)
  89   logical, parameter :: test_r4_pinf_parentheses = ((r4_pinf)).EQ.r4_pinf
  90   logical, parameter :: test_r4_ninf_parentheses = ((r4_ninf)).EQ.r4_ninf
  91
  92   ! No warnings expected
  93   logical, parameter :: test_r4_negation1 = (-r4_pmax).EQ.r4_nmax
  94   logical, parameter :: test_r4_negation2 = (-r4_nmax).EQ.r4_pmax
  95   logical, parameter :: test_r4_negation3 = (-r4_pinf).EQ.r4_ninf
  96   logical, parameter :: test_r4_negation4 = (-r4_ninf).EQ.r4_pinf
  97   logical, parameter :: test_r4_plus1 = (+r4_pmax).EQ.r4_pmax
  98   logical, parameter :: test_r4_plus2 = (+r4_nmax).EQ.r4_nmax
  99   logical, parameter :: test_r4_plus3 = (+r4_pinf).EQ.r4_pinf
 100   logical, parameter :: test_r4_plus4 = (+r4_ninf).EQ.r4_ninf
 101   ! NaN propagation , no warnings expected (quiet)
 102   real(4), parameter :: r4_nan_minus = (-r4_nan)
 103   TEST_ISNAN(r4_nan_minus)
 104   real(4), parameter :: r4_nan_plus = (+r4_nan)
 105   TEST_ISNAN(r4_nan_plus)
 106
 107   !WARN: warning: overflow on addition
 108   logical, parameter :: test_inf_r4_add9 = (r4_pmax + r4_pmax).eq.(r4_pinf)
 109   !WARN: warning: overflow on addition
 110   logical, parameter :: test_inf_r4_add10 = (r4_nmax + r4_nmax).eq.(r4_ninf)
 111   !WARN: warning: overflow on subtraction
 112   logical, parameter :: test_inf_r4_sub9 = (r4_pmax - r4_nmax).eq.(r4_pinf)
 113   !WARN: warning: overflow on subtraction
 114   logical, parameter :: test_inf_r4_sub10 = (r4_nmax - r4_pmax).eq.(r4_ninf)
 115
 116   ! No warnings expected below (inf propagation).
 117   logical, parameter :: test_inf_r4_add1 = (r4_pinf + r4_pinf).EQ.(r4_pinf)
 118   logical, parameter :: test_inf_r4_add2 = (r4_ninf + r4_ninf).EQ.(r4_ninf)
 119   logical, parameter :: test_inf_r4_add3 = (r4_pinf + r4_nmax).EQ.(r4_pinf)
 120   logical, parameter :: test_inf_r4_add4 = (r4_pinf + r4_pmax).EQ.(r4_pinf)
 121   logical, parameter :: test_inf_r4_add5 = (r4_ninf + r4_pmax).EQ.(r4_ninf)
 122   logical, parameter :: test_inf_r4_add6 = (r4_ninf + r4_nmax).EQ.(r4_ninf)
 123   logical, parameter :: test_inf_r4_add7 = (r4_ninf + 0._4).EQ.(r4_ninf)
 124   logical, parameter :: test_inf_r4_add8 = (r4_pinf + 0._4).EQ.(r4_pinf)
 125
 126   !WARN: warning: invalid argument on subtraction
 127   real(4), parameter :: r4_nan_sub1 = r4_pinf - r4_pinf
 128   TEST_ISNAN(r4_nan_sub1)
 129   !WARN: warning: invalid argument on subtraction
 130   real(4), parameter :: r4_nan_sub2 = r4_ninf - r4_ninf
 131   TEST_ISNAN(r4_nan_sub2)
 132   !WARN: warning: invalid argument on addition
 133   real(4), parameter :: r4_nan_add1 = r4_ninf + r4_pinf
 134   TEST_ISNAN(r4_nan_add1)
 135   !WARN: warning: invalid argument on addition
 136   real(4), parameter :: r4_nan_add2 = r4_pinf + r4_ninf
 137   TEST_ISNAN(r4_nan_add2)
 138
 139   ! No warnings expected here (quite NaN propagation)
 140   real(4), parameter :: r4_nan_sub3 = 0._4 - r4_nan
 141   TEST_ISNAN(r4_nan_sub3)
 142   real(4), parameter :: r4_nan_sub4 = r4_nan - r4_pmax
 143   TEST_ISNAN(r4_nan_sub4)
 144   real(4), parameter :: r4_nan_sub5 = r4_nan - r4_nmax
 145   TEST_ISNAN(r4_nan_sub5)
 146   real(4), parameter :: r4_nan_sub6 = r4_nan - r4_nan
 147   TEST_ISNAN(r4_nan_sub6)
 148   real(4), parameter :: r4_nan_add3 = 0._4 + r4_nan
 149   TEST_ISNAN(r4_nan_add3)
 150   real(4), parameter :: r4_nan_add4 = r4_nan + r4_pmax
 151   TEST_ISNAN(r4_nan_add4)
 152   real(4), parameter :: r4_nan_add5 = r4_nmax + r4_nan
 153   TEST_ISNAN(r4_nan_add5)
 154   real(4), parameter :: r4_nan_add6 = r4_nan + r4_nan
 155   TEST_ISNAN(r4_nan_add6)
 156
 157   !WARN: warning: overflow on multiplication
 158   logical, parameter :: test_inf_r4_mult1 = (1.5_4*r4_pmax).eq.(r4_pinf)
 159   !WARN: warning: overflow on multiplication
 160   logical, parameter :: test_inf_r4_mult2 = (1.5_4*r4_nmax).eq.(r4_ninf)
 161   !WARN: warning: overflow on division
 162   logical, parameter :: test_inf_r4_div1 = (r4_nmax/(-0.5_4)).eq.(r4_pinf)
 163   !WARN: warning: overflow on division
 164   logical, parameter :: test_inf_r4_div2 = (r4_pmax/(-0.5_4)).eq.(r4_ninf)
 165
 166   ! No warnings expected below (inf propagation).
 167   logical, parameter :: test_inf_r4_mult3 = (r4_pinf*r4_pinf).EQ.(r4_pinf)
 168   logical, parameter :: test_inf_r4_mult4 = (r4_ninf*r4_ninf).EQ.(r4_pinf)
 169   logical, parameter :: test_inf_r4_mult5 = (r4_pinf*0.1_4).EQ.(r4_pinf)
 170   logical, parameter :: test_inf_r4_mult6 = (r4_ninf*r4_nmax).EQ.(r4_pinf)
 171   logical, parameter :: test_inf_r4_div3 = (r4_pinf/0.).EQ.(r4_pinf)
 172   logical, parameter :: test_inf_r4_div4 = (r4_ninf/0.).EQ.(r4_ninf)
 173   logical, parameter :: test_inf_r4_div5 = (0./r4_pinf).EQ.(0.)
 174   logical, parameter :: test_inf_r4_div6 = (0./r4_ninf).EQ.(0.)
 175   logical, parameter :: test_inf_r4_div7 = (r4_pinf/r4_pmax).EQ.(r4_pinf)
 176   logical, parameter :: test_inf_r4_div8 = (r4_pinf/r4_nmax).EQ.(r4_ninf)
 177   logical, parameter :: test_inf_r4_div9 = (r4_nmax/r4_pinf).EQ.(0.)
 178   logical, parameter :: test_inf_r4_div10 = (r4_nmax/r4_ninf).EQ.(0.)
 179
 180   !WARN: warning: invalid argument on division
 181   real(4), parameter :: r4_nan_div1 = 0._4/0._4
 182   TEST_ISNAN(r4_nan_div1)
 183   !WARN: warning: invalid argument on division
 184   real(4), parameter :: r4_nan_div2 = r4_ninf/r4_ninf
 185   TEST_ISNAN(r4_nan_div2)
 186   !WARN: warning: invalid argument on division
 187   real(4), parameter :: r4_nan_div3 = r4_ninf/r4_pinf
 188   TEST_ISNAN(r4_nan_div3)
 189   !WARN: warning: invalid argument on division
 190   real(4), parameter :: r4_nan_div4 = r4_pinf/r4_ninf
 191   TEST_ISNAN(r4_nan_div4)
 192   !WARN: warning: invalid argument on division
 193   real(4), parameter :: r4_nan_div5 = r4_pinf/r4_pinf
 194   TEST_ISNAN(r4_nan_div5)
 195   !WARN: warning: invalid argument on multiplication
 196   real(4), parameter :: r4_nan_mult1 = r4_pinf*0._4
 197   TEST_ISNAN(r4_nan_mult1)
 198   !WARN: warning: invalid argument on multiplication
 199   real(4), parameter :: r4_nan_mult2 = 0._4*r4_ninf
 200   TEST_ISNAN(r4_nan_mult2)
 201
 202   ! No warnings expected here (quite NaN propagation)
 203   real(4), parameter :: r4_nan_div6 = 0._4/r4_nan
 204   TEST_ISNAN(r4_nan_div6)
 205   real(4), parameter :: r4_nan_div7 = r4_nan/r4_nan
 206   TEST_ISNAN(r4_nan_div7)
 207   real(4), parameter :: r4_nan_div8 = r4_nan/0._4
 208   TEST_ISNAN(r4_nan_div8)
 209   real(4), parameter :: r4_nan_div9 = r4_nan/1._4
 210   TEST_ISNAN(r4_nan_div9)
 211   real(4), parameter :: r4_nan_mult3 = r4_nan*1._4
 212   TEST_ISNAN(r4_nan_mult3)
 213   real(4), parameter :: r4_nan_mult4 = r4_nan*r4_nan
 214   TEST_ISNAN(r4_nan_mult4)
 215   real(4), parameter :: r4_nan_mult5 = 0._4*r4_nan
 216   TEST_ISNAN(r4_nan_mult5)
 217
 218   ! TODO: ** operator folding
 219   !  logical, parameter :: test_inf_r4_exp1 = (r4_pmax**2._4).EQ.(r4_pinf)
 220
 221   ! Relational operator edge cases (No warnings expected?)
 222   logical, parameter :: test_inf_r4_eq1 = r4_pinf.EQ.r4_pinf
 223   logical, parameter :: test_inf_r4_eq2 = r4_ninf.EQ.r4_ninf
 224   logical, parameter :: test_inf_r4_eq3 = .NOT.(r4_pinf.EQ.r4_ninf)
 225   logical, parameter :: test_inf_r4_eq4 = .NOT.(r4_pinf.EQ.r4_pmax)
 226
 227   logical, parameter :: test_inf_r4_ne1 = .NOT.(r4_pinf.NE.r4_pinf)
 228   logical, parameter :: test_inf_r4_ne2 = .NOT.(r4_ninf.NE.r4_ninf)
 229   logical, parameter :: test_inf_r4_ne3 = r4_pinf.NE.r4_ninf
 230   logical, parameter :: test_inf_r4_ne4 = r4_pinf.NE.r4_pmax
 231
 232   logical, parameter :: test_inf_r4_gt1 = .NOT.(r4_pinf.GT.r4_pinf)
 233   logical, parameter :: test_inf_r4_gt2 = .NOT.(r4_ninf.GT.r4_ninf)
 234   logical, parameter :: test_inf_r4_gt3 = r4_pinf.GT.r4_ninf
 235   logical, parameter :: test_inf_r4_gt4 = r4_pinf.GT.r4_pmax
 236
 237   logical, parameter :: test_inf_r4_lt1 = .NOT.(r4_pinf.LT.r4_pinf)
 238   logical, parameter :: test_inf_r4_lt2 = .NOT.(r4_ninf.LT.r4_ninf)
 239   logical, parameter :: test_inf_r4_lt3 = r4_ninf.LT.r4_pinf
 240   logical, parameter :: test_inf_r4_lt4 = r4_pmax.LT.r4_pinf
 241
 242   logical, parameter :: test_inf_r4_ge1 = r4_pinf.GE.r4_pinf
 243   logical, parameter :: test_inf_r4_ge2 = r4_ninf.GE.r4_ninf
 244   logical, parameter :: test_inf_r4_ge3 = .NOT.(r4_ninf.GE.r4_pinf)
 245   logical, parameter :: test_inf_r4_ge4 = .NOT.(r4_pmax.GE.r4_pinf)
 246
 247   logical, parameter :: test_inf_r4_le1 = r4_pinf.LE.r4_pinf
 248   logical, parameter :: test_inf_r4_le2 = r4_ninf.LE.r4_ninf
 249   logical, parameter :: test_inf_r4_le3 = .NOT.(r4_pinf.LE.r4_ninf)
 250   logical, parameter :: test_inf_r4_le4 = .NOT.(r4_pinf.LE.r4_pmax)
 251
 252   ! Invalid relational argument
 253   logical, parameter :: test_nan_r4_eq1 = .NOT.(r4_nan.EQ.r4_nan)
 254   logical, parameter :: test_nan_r4_ne1 = .NOT.(r4_nan.NE.r4_nan)
 255
 256 end module
 257
 258 ! TODO: edge case conversions
 259 ! TODO: complex tests (or is real tests enough?)
 260
 261 ! Logical operation (with logical arguments) cannot overflow or be invalid.
 262 ! CHARACTER folding operations may cause host memory exhaustion if the
 263 ! string are very large. This will cause a fatal error for the program
 264 ! doing folding (e.g. f18), so there is nothing very interesting to test here.