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Add an option to allocate JITed global data separately from code. By

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default, this option is not enabled to support clients who rely on
this behavior.

Fixes http://llvm.org/PR4483

A patch to allocate additional memory for globals after we run out is
forthcoming.

Patch by Reid Kleckner!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75059 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jeffrey Yasskin
2009-07-08 21:59:57 +00:00
parent e41dec60fa
commit 489393d7b9
12 changed files with 291 additions and 72 deletions
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20
include/llvm/ExecutionEngine/ExecutionEngine.h
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@@ -87,7 +87,8 @@ protected:
// libraries, the JIT and Interpreter set these functions to ctor pointers
// at startup time if they are linked in.
typedef ExecutionEngine *(*EECtorFn)(ModuleProvider*, std::string*,
CodeGenOpt::Level OptLevel);
CodeGenOpt::Level OptLevel,
bool GVsWithCode);
static EECtorFn JITCtor, InterpCtor;
/// LazyFunctionCreator - If an unknown function is needed, this function
@@ -118,8 +119,18 @@ public:
bool ForceInterpreter = false,
std::string *ErrorStr = 0,
CodeGenOpt::Level OptLevel =
CodeGenOpt::Default);
CodeGenOpt::Default,
// Allocating globals with code breaks
// freeMachineCodeForFunction and is probably
// unsafe and bad for performance. However,
// we have clients who depend on this
// behavior, so we must support it.
// Eventually, when we're willing to break
// some backwards compatability, this flag
// should be flipped to false, so that by
// default freeMachineCodeForFunction works.
bool GVsWithCode = true);
/// create - This is the factory method for creating an execution engine which
/// is appropriate for the current machine. This takes ownership of the
/// module.
@@ -132,7 +143,8 @@ public:
std::string *ErrorStr = 0,
JITMemoryManager *JMM = 0,
CodeGenOpt::Level OptLevel =
CodeGenOpt::Default);
CodeGenOpt::Default,
bool GVsWithCode = true);
/// addModuleProvider - Add a ModuleProvider to the list of modules that we
/// can JIT from. Note that this takes ownership of the ModuleProvider: when