From d4bcefc7d9ff16710b2509e494614b5c08013567 Mon Sep 17 00:00:00 2001
From: Rafael Espindola <rafael.espindola@gmail.com>
Date: Fri, 24 Oct 2014 18:13:04 +0000
Subject: Don't ever call materializeAllPermanently during LTO.

To do this, change the representation of lazy loaded functions.

The previous representation cannot differentiate between a function whose body
has been removed and one whose body hasn't been read from the .bc file. That
means that in order to drop a function, the entire body had to be read.

llvm-svn: 220580
---
 llvm/lib/IR/Function.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'llvm/lib/IR/Function.cpp')

diff --git a/llvm/lib/IR/Function.cpp b/llvm/lib/IR/Function.cpp
index 2323c74..8a69e39 100644
--- a/llvm/lib/IR/Function.cpp
+++ b/llvm/lib/IR/Function.cpp
@@ -213,6 +213,12 @@ void Argument::removeAttr(AttributeSet AS) {
 // Helper Methods in Function
 //===----------------------------------------------------------------------===//
 
+bool Function::isMaterializable() const {
+  return getGlobalObjectSubClassData();
+}
+
+void Function::setIsMaterializable(bool V) { setGlobalObjectSubClassData(V); }
+
 LLVMContext &Function::getContext() const {
   return getType()->getContext();
 }
@@ -247,6 +253,7 @@ Function::Function(FunctionType *Ty, LinkageTypes Linkage, const Twine &name,
                    Linkage, name) {
   assert(FunctionType::isValidReturnType(getReturnType()) &&
          "invalid return type");
+  setIsMaterializable(false);
   SymTab = new ValueSymbolTable();
 
   // If the function has arguments, mark them as lazily built.
@@ -318,6 +325,8 @@ void Function::setParent(Module *parent) {
 // delete.
 //
 void Function::dropAllReferences() {
+  setIsMaterializable(false);
+
   for (iterator I = begin(), E = end(); I != E; ++I)
     I->dropAllReferences();
 
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