improve a comment
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36464 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index 654eafe..53431dd 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -572,8 +572,9 @@
// Emit constants.
WriteModuleConstants(VE, Stream);
- // FIXME: Purge aggregate values from the VE, emit a record that indicates how
- // many to purge.
+ // If we have any aggregate values in the value table, purge them - these can
+ // only be used to initialize global variables. Doing so makes the value
+ // namespace smaller for code in functions.
int NumNonAggregates = VE.PurgeAggregateValues();
if (NumNonAggregates != -1) {
SmallVector<unsigned, 1> Vals;
@@ -583,7 +584,8 @@
// Emit function bodies.
for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
- WriteFunction(*I, VE, Stream);
+ if (!I->isDeclaration())
+ WriteFunction(*I, VE, Stream);
// Emit the type symbol table information.
WriteTypeSymbolTable(M->getTypeSymbolTable(), VE, Stream);