[llvm] r331376 - Add assertion to padding size calculation, NFC

[Krzysztof Parzyszek via llvm-commits]

Author: kparzysz
Date: Wed May  2 10:20:22 2018
New Revision: 331376

URL: http://llvm.org/viewvc/llvm-project?rev=331376&view=rev
Log:
Add assertion to padding size calculation, NFC

The size of an object cannot be less than the emitted size of all the
contained elements. This would cause an overflow in padding size
calculation. Add an assert to catch this.

Patch by Suyog Sarda.

Modified:
    llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

Modified: llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp?rev=331376&r1=331375&r2=331376&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/AsmPrinter.cpp Wed May  2 10:20:22 2018
@@ -2235,6 +2235,7 @@ static void emitGlobalConstantDataSequen
   unsigned Size = DL.getTypeAllocSize(CDS->getType());
   unsigned EmittedSize = DL.getTypeAllocSize(CDS->getType()->getElementType()) *
                         CDS->getNumElements();
+  assert(EmittedSize <= Size && "Size cannot be less than EmittedSize!");
   if (unsigned Padding = Size - EmittedSize)
     AP.OutStreamer->EmitZeros(Padding);
 }