r349940 - Switch from cast<> to dyn_cast<>.

[Aaron Ballman via cfe-commits]

Author: aaronballman
Date: Fri Dec 21 11:16:38 2018
New Revision: 349940

URL: http://llvm.org/viewvc/llvm-project?rev=349940&view=rev
Log:
Switch from cast<> to dyn_cast<>.

This avoids a potential failed assertion that is happening on someone's out-of-tree build.

Modified:
    cfe/trunk/utils/TableGen/ClangSACheckersEmitter.cpp

Modified: cfe/trunk/utils/TableGen/ClangSACheckersEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/utils/TableGen/ClangSACheckersEmitter.cpp?rev=349940&r1=349939&r2=349940&view=diff
==============================================================================
--- cfe/trunk/utils/TableGen/ClangSACheckersEmitter.cpp (original)
+++ cfe/trunk/utils/TableGen/ClangSACheckersEmitter.cpp Fri Dec 21 11:16:38 2018
@@ -63,8 +63,11 @@ static inline uint64_t getValueFromBitsI
 
   uint64_t Value = 0;
   for (unsigned i = 0, e = B->getNumBits(); i != e; ++i) {
-    const auto *Bit = cast<BitInit>(B->getBit(i));
-    Value |= uint64_t(Bit->getValue()) << i;
+    const auto *Bit = dyn_cast<BitInit>(B->getBit(i));
+    if (Bit)
+      Value |= uint64_t(Bit->getValue()) << i;
+    else
+      PrintFatalError("Invalid bits");
   }
   return Value;
 }