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Not having an aliasee is a theoretical possibility.
author
Duncan Sands
<baldrick@free.fr>
Mon, 5 Jan 2009 20:47:56 +0000
(20:47 +0000)
committer
Duncan Sands
<baldrick@free.fr>
Mon, 5 Jan 2009 20:47:56 +0000
(20:47 +0000)
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61745
91177308
-0d34-0410-b5e6-
96231b3b80d8
lib/Transforms/IPO/GlobalDCE.cpp
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diff --git
a/lib/Transforms/IPO/GlobalDCE.cpp
b/lib/Transforms/IPO/GlobalDCE.cpp
index a9c9ec0fd844abc66bd55150834c3f2a9caba936..654a5095d062d9711a753cf800df8cd6217f838a 100644
(file)
--- a/
lib/Transforms/IPO/GlobalDCE.cpp
+++ b/
lib/Transforms/IPO/GlobalDCE.cpp
@@
-161,7
+161,8
@@
void GlobalDCE::GlobalIsNeeded(GlobalValue *G) {
MarkUsedGlobalsAsNeeded(GV->getInitializer());
} else if (GlobalAlias *GA = dyn_cast<GlobalAlias>(G)) {
// The target of a global alias is needed.
- MarkUsedGlobalsAsNeeded(GA->getAliasee());
+ if (Constant *Aliasee = GA->getAliasee())
+ MarkUsedGlobalsAsNeeded(Aliasee);
} else {
// Otherwise this must be a function object. We have to scan the body of
// the function looking for constants and global values which are used as