Support for allocation of TLS variables in the JIT. Allocation of a global
variable is moved to the execution engine. The JIT calls the TargetJITInfo
to allocate thread local storage. Currently, only linux/x86 knows how to
allocate thread local global variables.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@58142 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/ExecutionEngine.cpp b/lib/ExecutionEngine/ExecutionEngine.cpp
index 55151cb..a13fdc2 100644
--- a/lib/ExecutionEngine/ExecutionEngine.cpp
+++ b/lib/ExecutionEngine/ExecutionEngine.cpp
@@ -52,6 +52,12 @@
delete Modules[i];
}
+char* ExecutionEngine::getMemoryForGV(const GlobalVariable* GV) {
+ const Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
+ return new char[GVSize];
+}
+
/// removeModuleProvider - Remove a ModuleProvider from the list of modules.
/// Release module from ModuleProvider.
Module* ExecutionEngine::removeModuleProvider(ModuleProvider *P,
@@ -873,7 +879,6 @@
/// their initializers into the memory.
///
void ExecutionEngine::emitGlobals() {
- const TargetData *TD = getTargetData();
// Loop over all of the global variables in the program, allocating the memory
// to hold them. If there is more than one module, do a prepass over globals
@@ -934,12 +939,7 @@
}
if (!I->isDeclaration()) {
- // Get the type of the global.
- const Type *Ty = I->getType()->getElementType();
-
- // Allocate some memory for it!
- unsigned Size = TD->getABITypeSize(Ty);
- addGlobalMapping(I, new char[Size]);
+ addGlobalMapping(I, getMemoryForGV(I));
} else {
// External variable reference. Try to use the dynamic loader to
// get a pointer to it.
@@ -991,15 +991,18 @@
void *GA = getPointerToGlobalIfAvailable(GV);
DOUT << "Global '" << GV->getName() << "' -> " << GA << "\n";
- const Type *ElTy = GV->getType()->getElementType();
- size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
if (GA == 0) {
// If it's not already specified, allocate memory for the global.
- GA = new char[GVSize];
+ GA = getMemoryForGV(GV);
addGlobalMapping(GV, GA);
}
-
- InitializeMemory(GV->getInitializer(), GA);
+
+ // Don't initialize if it's thread local, let the client do it.
+ if (!GV->isThreadLocal())
+ InitializeMemory(GV->getInitializer(), GA);
+
+ const Type *ElTy = GV->getType()->getElementType();
+ size_t GVSize = (size_t)getTargetData()->getABITypeSize(ElTy);
NumInitBytes += (unsigned)GVSize;
++NumGlobals;
}