commit 4c57267eceb7da7afb54491c37ea618d819d2e2f
author Chris Lattner <sabre@nondot.org> Thu Jan 15 21:06:57 2004 +0000
committer Chris Lattner <sabre@nondot.org> Thu Jan 15 21:06:57 2004 +0000
tree 8b7d02df19b530b02dc81bd2f0e4401cbe2a6bc7
parent 2d0e6f63268cb67ee407ddf48c4b2710d40af83c

If these blocks are empty, there is no reason to even emit the bytecode blocks.
This saves about 15K in 176.gcc, coupled with another patch that I'm working on.

llvm-svn: 10889

llvm/lib/Bytecode/Writer/Writer.cpp

diff --git a/llvm/lib/Bytecode/Writer/Writer.cpp b/llvm/lib/Bytecode/Writer/Writer.cpp
index 5675b2a..6467921 100644
--- a/llvm/lib/Bytecode/Writer/Writer.cpp
+++ b/llvm/lib/Bytecode/Writer/Writer.cpp
@@ -164,7 +164,8 @@
 void BytecodeWriter::outputConstants(bool isFunction) {
   ConstantTotalBytes -= Out.size();
   if (isFunction) FunctionConstantTotalBytes -= Out.size();
-  BytecodeBlock CPool(BytecodeFormat::ConstantPool, Out);
+  BytecodeBlock CPool(BytecodeFormat::ConstantPool, Out,
+                      true  /* Elide block if empty */);
 
   unsigned NumPlanes = Table.getNumPlanes();
 
@@ -286,7 +287,8 @@
 
   SymTabBytes -= Out.size();
   
-  BytecodeBlock SymTabBlock(BytecodeFormat::SymbolTable, Out);
+  BytecodeBlock SymTabBlock(BytecodeFormat::SymbolTable, Out,
+                            true/* ElideIfEmpty*/);
 
   for (SymbolTable::const_iterator TI = MST.begin(); TI != MST.end(); ++TI) {
     SymbolTable::type_const_iterator I = MST.type_begin(TI->first);