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compiler: Correct handling of negative zero floating constant. 

From-SVN: r186723
This commit is contained in:
Ian Lance Taylor 2012-04-23 20:49:47 +00:00
parent 40dd2f8b90
commit b1745377f4
1 changed files with 7 additions and 1 deletions
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8
gcc/go/gofrontend/expressions.cc
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@ -13620,7 +13620,13 @@ Numeric_constant::set_float(Type* type, const mpfr_t val)
this->clear();
this->classification_ = NC_FLOAT;
this->type_ = type;
mpfr_init_set(this->u_.float_val, val, GMP_RNDN);
// Numeric constants do not have negative zero values, so remove
// them here. They also don't have infinity or NaN values, but we
// should never see them here.
if (mpfr_zero_p(val))
mpfr_init_set_ui(this->u_.float_val, 0, GMP_RNDN);
else
mpfr_init_set(this->u_.float_val, val, GMP_RNDN);
}
// Set to a complex value.