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add a mechanism for the JIT to invoke a function to lazily create functions as they are referenced.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43210 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2007-10-22 02:50:12 +00:00
parent ec2fcafbea
commit d958a5a9fe
3 changed files with 21 additions and 3 deletions
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15
include/llvm/ExecutionEngine/ExecutionEngine.h
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@ -64,6 +64,7 @@ class ExecutionEngine {
const TargetData *TD;
ExecutionEngineState state;
bool LazyCompilationDisabled;
protected:
/// Modules - This is a list of ModuleProvider's that we are JIT'ing from. We
/// use a smallvector to optimize for the case where there is only one module.
@ -78,7 +79,11 @@ protected:
// at startup time if they are linked in.
typedef ExecutionEngine *(*EECtorFn)(ModuleProvider*, std::string*);
static EECtorFn JITCtor, InterpCtor;
/// LazyFunctionCreator - If an unknown function is needed, this function
/// pointer is invoked to create it. If this returns null, the JIT will abort.
void* (*LazyFunctionCreator)(const std::string &);
public:
/// lock - This lock is protects the ExecutionEngine, JIT, JITResolver and
/// JITEmitter classes. It must be held while changing the internal state of
@ -218,6 +223,14 @@ public:
bool isLazyCompilationDisabled() const {
return LazyCompilationDisabled;
}
/// InstallLazyFunctionCreator - If an unknown function is needed, the
/// specified function pointer is invoked to create it. If it returns null,
/// the JIT will abort.
void InstallLazyFunctionCreator(void* (*P)(const std::string &)) {
LazyFunctionCreator = P;
}
protected:
void emitGlobals();