add a comment about why we don't allow inlining indbr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85724 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/InlineCost.cpp b/lib/Analysis/InlineCost.cpp
index f6664ed..4f0b337 100644
--- a/lib/Analysis/InlineCost.cpp
+++ b/lib/Analysis/InlineCost.cpp
@@ -159,6 +159,11 @@
if (isa<ReturnInst>(BB->getTerminator()))
++NumRets;
+ // We never want to inline functions that contain an indirectbr. This is
+ // incorrect because all the blockaddress's (e.g. in static global
+ // initializers would be referring to the original function, and this indirect
+ // jump would jump from the inlined copy of the function into the original
+ // function which is extremely undefined behavior.
if (isa<IndirectBrInst>(BB->getTerminator()))
NeverInline = true;
}