From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Mon, 23 Apr 2012 20:49:33 +0000 (+0000)
Subject: compiler: Correct handling of negative zero floating constant.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=073d123ccf7036f9b103cc73f1a9b1bc3dd90d3b;p=gcc.git

compiler: Correct handling of negative zero floating constant.

From-SVN: r186722
---

diff --git a/gcc/go/gofrontend/expressions.cc b/gcc/go/gofrontend/expressions.cc
index cb94e4f8dd9..945f379465a 100644
--- a/gcc/go/gofrontend/expressions.cc
+++ b/gcc/go/gofrontend/expressions.cc
@@ -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.