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Preserve the names of zombie functions and use them as linkage names in the debug info.

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Swift SVN r22662
This commit is contained in:
Erik Eckstein
2014-10-10 13:26:28 +00:00
parent a69fc9833e
commit bdfb461569
4 changed files with 16 additions and 9 deletions
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15
lib/SIL/SILModule.cpp
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@@ -691,14 +691,16 @@ void SILModule::invalidateSILLoader() {
/// Erase a function from the module.
void SILModule::eraseFunction(SILFunction *F) {
FunctionTable.erase(F->getName());
// The owner of the function's Name was the FunctionTable key. Avoid a
// dangling pointer.
F->Name = StringRef();
assert(! F->isZombie() && "zombie function is in list of alive functions");
if (F->isInlined()) {
// The owner of the function's Name is the FunctionTable key. As we remove
// the function from the table we have to store the name string elsewhere:
// in zombieFunctionNames.
StringRef copiedName = F->getName().copy(zombieFunctionNames);
FunctionTable.erase(F->getName());
F->Name = copiedName;
// The function is dead, but as it is inlined we need it later (at IRGen)
// for debug info generation. So we move it into the zombie list.
getFunctionList().remove(F);
@@ -709,6 +711,7 @@ void SILModule::eraseFunction(SILFunction *F) {
// (References are not needed for debug info generation.)
F->dropAllReferences();
} else {
FunctionTable.erase(F->getName());
getFunctionList().erase(F);
}
}