Bug 141 - Signed integer overflow handled incorrectly

D-Programming-GDC · Jul 17, 2014 · 2b3286e · 2b3286e
1 parent 9e09583
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diff --git a/gcc/d/ChangeLog b/gcc/d/ChangeLog
@@ -1,3 +1,7 @@
+2014-07-17  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* d-lang.cc(d_init_options_struct): Set flag_wrapv as on by default.
+
 2014-07-14  Iain Buclaw  <ibuclaw@gdcproject.org>
 
 	* d-elem.cc(NewExp::toElem): Don't initialise a new'd struct at the

diff --git a/gcc/d/d-lang.cc b/gcc/d/d-lang.cc
@@ -199,6 +199,9 @@ d_init_options_struct (gcc_options *opts)
 
   // Honour left to right code evaluation.
   opts->x_flag_evaluation_order = 1;
+
+  // D says that signed overflow is precisely defined.
+  opts->x_flag_wrapv = 1;
 }
 
 static void