Index: llvm/lib/IR/Globals.cpp
===================================================================
--- llvm/lib/IR/Globals.cpp
+++ llvm/lib/IR/Globals.cpp
@@ -444,6 +444,8 @@
 findBaseObject(const Constant *C, DenseSet<const GlobalAlias *> &Aliases) {
   if (auto *GO = dyn_cast<GlobalObject>(C))
     return GO;
+  if (auto *GI = dyn_cast<GlobalIFunc>(C))
+    return findBaseObject(GI->getOperand(0), Aliases);
   if (auto *GA = dyn_cast<GlobalAlias>(C))
     if (Aliases.insert(GA).second)
       return findBaseObject(GA->getOperand(0), Aliases);
Index: llvm/test/Bitcode/thinlto-summary-alias-ifunc.ll
===================================================================
--- /dev/null
+++ llvm/test/Bitcode/thinlto-summary-alias-ifunc.ll
@@ -0,0 +1,19 @@
+; RUN: opt -module-summary %s -o - | llvm-bcanalyzer -dump | FileCheck %s
+
+; PR46340
+; Check that alias-to-ifunc is properly generated in the module summary.
+
+; CHECK: <GLOBALVAL_SUMMARY_BLOCK
+; CHECK: <ALIAS
+; CHECK: </GLOBALVAL_SUMMARY_BLOCK>
+
+@bar = dso_local alias void (), void ()* @foo
+@foo = dso_local ifunc void (), bitcast (i8* ()* @foo_ifunc to void ()*)
+
+define internal i8* @foo_ifunc() {
+  ret i8* bitcast (void ()* @foo_impl to i8*)
+}
+
+define internal void @foo_impl() {
+  ret void
+}