[llvm] r370217 - [NFC] Added a comment to avoid possible confusion

[David Bolvansky via llvm-commits]

Author: xbolva00
Date: Wed Aug 28 08:04:48 2019
New Revision: 370217

URL: http://llvm.org/viewvc/llvm-project?rev=370217&view=rev
Log:
[NFC] Added a comment to avoid possible confusion

Modified:
    llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp

Modified: llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp?rev=370217&r1=370216&r2=370217&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp (original)
+++ llvm/trunk/lib/Transforms/InstCombine/InstCombineCalls.cpp Wed Aug 28 08:04:48 2019
@@ -4183,8 +4183,10 @@ static void annotateAnyAllocSite(CallBas
   ConstantInt *Op1C = (Call.getNumArgOperands() == 1)
                           ? nullptr
                           : dyn_cast<ConstantInt>(Call.getOperand(1));
+  // Bail out if the allocation size is zero.
   if ((Op0C && Op0C->isNullValue()) || (Op1C && Op1C->isNullValue()))
     return;
+
   if (isMallocLikeFn(&Call, TLI) && Op0C) {
     Call.addAttribute(AttributeList::ReturnIndex,
                       Attribute::getWithDereferenceableOrNullBytes(