[llvm-commits] CVS: llvm/lib/Bytecode/Writer/Writer.cpp

[Chris Lattner]

Changes in directory llvm/lib/Bytecode/Writer:

Writer.cpp updated: 1.89 -> 1.90
---
Log message:

Do not emit FunctionBlock blocks for external functions.  This shrinks
bytecode files by about 8 bytes per external function


---
Diffs of the changes:  (+5 -3)

Index: llvm/lib/Bytecode/Writer/Writer.cpp
diff -u llvm/lib/Bytecode/Writer/Writer.cpp:1.89 llvm/lib/Bytecode/Writer/Writer.cpp:1.90
--- llvm/lib/Bytecode/Writer/Writer.cpp:1.89	Mon Nov 15 15:56:33 2004
+++ llvm/lib/Bytecode/Writer/Writer.cpp	Mon Nov 15 16:39:49 2004
@@ -919,6 +919,8 @@
     assert(Slot >= Type::FirstDerivedTyID && "Derived type not in range!");
     assert(((Slot << 5) >> 5) == Slot && "Slot # too big!");
     unsigned ID = (Slot << 5) + 1;
+    if (I->isExternal())   // If external, we don't have an FunctionInfo block.
+      ID |= 1 << 4;
     output_vbr(ID);
   }
   output_vbr((unsigned)Table.getSlot(Type::VoidTy) << 5);
@@ -942,12 +944,12 @@
 }
 
 void BytecodeWriter::outputFunction(const Function *F) {
-  BytecodeBlock FunctionBlock(BytecodeFormat::FunctionBlockID, *this);
-  output_vbr(getEncodedLinkage(F));
-
   // If this is an external function, there is nothing else to emit!
   if (F->isExternal()) return;
 
+  BytecodeBlock FunctionBlock(BytecodeFormat::FunctionBlockID, *this);
+  output_vbr(getEncodedLinkage(F));
+
   // Get slot information about the function...
   Table.incorporateFunction(F);