[APFloat] Fix APFloat::getExactInverse when the input is nullptr. This is a regression introduced by r285105.

Reviewers: kbarton, echristo, iteratee, eugenis

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D26017

llvm-svn: 285256

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/include/llvm/ADT/APFloat.h b/llvm/include/llvm/ADT/APFloat.h
index f809065a5ed..c44696decdc 100644
--- a/llvm/include/llvm/ADT/APFloat.h
+++ b/llvm/include/llvm/ADT/APFloat.h
@@ -855,7 +855,7 @@ public:
   }
 
   bool getExactInverse(APFloat *inv) const {
-    return IEEE.getExactInverse(&inv->IEEE);
+    return IEEE.getExactInverse(inv ? &inv->IEEE : nullptr);
   }
 
   friend hash_code hash_value(const APFloat &Arg);