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Don't ever call materializeAllPermanently during LTO.

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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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220580 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2014-10-24 18:13:04 +00:00
parent 51fa1bcef3
commit 68b02dcd54
14 changed files with 76 additions and 77 deletions
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11
lib/Bitcode/Reader/BitcodeReader.cpp
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@ -2070,6 +2070,7 @@ std::error_code BitcodeReader::ParseModule(bool Resume) {
// If this is a function with a body, remember the prototype we are
// creating now, so that we can match up the body with them later.
if (!isProto) {
Func->setIsMaterializable(true);
FunctionsWithBodies.push_back(Func);
if (LazyStreamer)
DeferredFunctionInfo[Func] = 0;
@ -3281,14 +3282,6 @@ std::error_code BitcodeReader::FindFunctionInStream(
void BitcodeReader::releaseBuffer() { Buffer.release(); }
bool BitcodeReader::isMaterializable(const GlobalValue *GV) const {
if (const Function *F = dyn_cast<Function>(GV)) {
return F->isDeclaration() &&
DeferredFunctionInfo.count(const_cast<Function*>(F));
}
return false;
}
std::error_code BitcodeReader::Materialize(GlobalValue *GV) {
Function *F = dyn_cast<Function>(GV);
// If it's not a function or is already material, ignore the request.
@ -3308,6 +3301,7 @@ std::error_code BitcodeReader::Materialize(GlobalValue *GV) {
if (std::error_code EC = ParseFunctionBody(F))
return EC;
F->setIsMaterializable(false);
// Upgrade any old intrinsic calls in the function.
for (UpgradedIntrinsicMap::iterator I = UpgradedIntrinsics.begin(),
@ -3349,6 +3343,7 @@ void BitcodeReader::Dematerialize(GlobalValue *GV) {
// Just forget the function body, we can remat it later.
F->dropAllReferences();
F->setIsMaterializable(true);
}
std::error_code BitcodeReader::MaterializeModule(Module *M) {