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| author | Thomas Koenig <tkoenig@netcologne.de> | 2017-01-23 19:43:28 +0000 |
|---|---|---|
| committer | Thomas Koenig <tkoenig@gcc.gnu.org> | 2017-01-23 19:43:28 +0000 |
| commit | 15b8fd499dd07627a78253ab722cc9049d86d68a (patch) | |
| tree | 02869f328c1d246803486b6bbb269f001c4407e2 /gcc/fortran/arith.c | |
| parent | 53d190c120b3e98f54ed3093d22a72bdf87d690b (diff) | |
| download | gcc-15b8fd499dd07627a78253ab722cc9049d86d68a.zip gcc-15b8fd499dd07627a78253ab722cc9049d86d68a.tar.gz gcc-15b8fd499dd07627a78253ab722cc9049d86d68a.tar.bz2 | |
arith.c (arith_power): If simplifying integer power expression to zero...
2017-01-23 Thomas Koenig <tkoenig@netcologne.de>
* arith.c (arith_power): If simplifying integer power expression
to zero, warn if -Winteger-division is given.
2017-01-23 Thomas Koenig <tkoenig@netcologne.de>
* gfortran.dg/integer_exponentiation_7.f90: New test.
From-SVN: r244830
Diffstat (limited to 'gcc/fortran/arith.c')
| -rw-r--r-- | gcc/fortran/arith.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/fortran/arith.c b/gcc/fortran/arith.c index 9d144872..8fa305c 100644 --- a/gcc/fortran/arith.c +++ b/gcc/fortran/arith.c @@ -874,6 +874,10 @@ arith_power (gfc_expr *op1, gfc_expr *op2, gfc_expr **resultp) { /* if op2 < 0, op1**op2 == 0 because abs(op1) > 1. */ mpz_set_si (result->value.integer, 0); + if (warn_integer_division) + gfc_warning_now (OPT_Winteger_division, "Negative " + "exponent of integer has zero " + "result at %L", &result->where); } else if (gfc_extract_int (op2, &power)) { |