Don't remove aggregate-typed module level constants before encoding functions

since functions may contain aggregate constants too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73220 91177308-0d34-0410-b5e6-96231b3b80d8

test/Bitcode/2009-06-11-FirstClassAggregateConstant.ll

@@ -0,0 +1,12 @@
+; RUN: llvm-as < %s | llvm-dis -disable-output
+; PR4373
+
+@foo = weak global { i32 } zeroinitializer              
+@bar = weak global i32 0                
+
+define void @test() {
+entry:
+        store { i32 } zeroinitializer, { i32 }* @foo
+        store i32 1, i32* @bar
+        ret void
+}