commit af118bb6d0c4b847617d6660f8bae0073f5812b7
author David Bolvansky <david.bolvansky@gmail.com> Wed Aug 28 15:04:48 2019 +0000
committer David Bolvansky <david.bolvansky@gmail.com> Wed Aug 28 15:04:48 2019 +0000
tree 69fa3e4f6cff55c250c6ee11cfa117ffd724ff7c
parent 329442192625284cedc3190795e1c046f933ea33

[NFC] Added a comment to avoid possible confusion

llvm-svn: 370217

llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp

diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
index c3be8c4..d304f98 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp
@@ -4183,8 +4183,10 @@
   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(