https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61910
Bug ID: 61910
Summary: undefined computation in trans-expr.c
gfc_conv_cst_int_power
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: zeccav at gmail dot com
Analyzing with sanitized gfortran the following line
j=i**(-huge(0_8)-1)
I get the following message:
../../gcc-4.9.1/gcc/fortran/trans-expr.c:2107:48: runtime error:
negation of -9223372036854775808 cannot be represented in type 'long int';
cast to an unsigned type to negate this value to itself"
The offending line in trans-expr.c is
"n = (unsigned HOST_WIDE_INT) (m < 0 ? -m : m);"
