deepCopyIRCAS: handle NULL dataHi and expdHi without segfaulting.

git-svn-id: svn://svn.valgrind.org/vex/trunk@1910

diff --git a/VEX/priv/ir_defs.c b/VEX/priv/ir_defs.c
index f58c60c08a9c099664f17980ae1635fb2a5d72a3..971370df82764f702cfdff8ab4da8b61dec92979 100644 (file)
--- a/VEX/priv/ir_defs.c
+++ b/VEX/priv/ir_defs.c
@@ -1460,9 +1460,9 @@ IRCAS* deepCopyIRCAS ( IRCAS* cas )
 {
    return mkIRCAS( cas->oldHi, cas->oldLo, cas->end,
                    deepCopyIRExpr(cas->addr),
-                   deepCopyIRExpr(cas->expdHi),
+                   cas->expdHi==NULL ? NULL : deepCopyIRExpr(cas->expdHi),
                    deepCopyIRExpr(cas->expdLo),
-                   deepCopyIRExpr(cas->dataHi),
+                   cas->dataHi==NULL ? NULL : deepCopyIRExpr(cas->dataHi),
                    deepCopyIRExpr(cas->dataLo) );
 }