From 1d2da668320f4c5ff070f65f50ca694bfc31cddb Mon Sep 17 00:00:00 2001
From: Walter Bright <walter@walterbright.com>
Date: Wed, 20 Sep 2017 02:22:05 -0700
Subject: [PATCH] fix Issue 17843 - -betterC struct with  field generates
 references to TypeInfo

---
 src/ddmd/clone.d                       |  5 +++--
 src/ddmd/dsymbolsem.d                  |  9 ++++++---
 test/runnable/{cassert.d => betterc.d} | 11 +++++++++++
 3 files changed, 20 insertions(+), 5 deletions(-)
 rename test/runnable/{cassert.d => betterc.d} (51%)

diff --git a/src/ddmd/clone.d b/src/ddmd/clone.d
index 469c4bee44a6..8d080f1b9596 100644
--- a/src/ddmd/clone.d
+++ b/src/ddmd/clone.d
@@ -695,8 +695,9 @@ private bool needToHash(StructDeclaration sd)
         }
         if (tv.isfloating())
         {
-            // This is necessray for:
-            //  1. comparison of +0.0 and -0.0 should be true.
+            /* This is necessary because comparison of +0.0 and -0.0 should be true,
+             * i.e. not a bit compare.
+             */
             goto Lneed;
         }
         if (tv.ty == Tarray)
diff --git a/src/ddmd/dsymbolsem.d b/src/ddmd/dsymbolsem.d
index 017de950a839..2cf3dd6008a8 100644
--- a/src/ddmd/dsymbolsem.d
+++ b/src/ddmd/dsymbolsem.d
@@ -5473,9 +5473,12 @@ private extern(C++) final class DsymbolSemanticVisitor : Visitor
         buildOpAssign(sd, sc2);
         buildOpEquals(sd, sc2);
 
-        sd.xeq = buildXopEquals(sd, sc2);
-        sd.xcmp = buildXopCmp(sd, sc2);
-        sd.xhash = buildXtoHash(sd, sc2);
+        if (global.params.useTypeInfo)  // these functions are used for TypeInfo
+        {
+            sd.xeq = buildXopEquals(sd, sc2);
+            sd.xcmp = buildXopCmp(sd, sc2);
+            sd.xhash = buildXtoHash(sd, sc2);
+        }
 
         sd.inv = buildInv(sd, sc2);
 
diff --git a/test/runnable/cassert.d b/test/runnable/betterc.d
similarity index 51%
rename from test/runnable/cassert.d
rename to test/runnable/betterc.d
index 8c7675084957..78e9b9a28709 100644
--- a/test/runnable/cassert.d
+++ b/test/runnable/betterc.d
@@ -10,6 +10,17 @@ void test(int ij)
     assert(ij,"it is not zero");
 }
 
+/*******************************************/
+// https://issues.dlang.org/show_bug.cgi?id=17843
+
+struct S
+{
+    double d = 0.0;
+    int[] x;
+}
+
+/*******************************************/
+
 extern (C) int main()
 {
     test(1);