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Implement TargetRegistrationListener

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14759 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-07-11 06:03:21 +00:00
parent 2845ece825
commit 7c38def077
1 changed files with 26 additions and 0 deletions
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26
lib/Target/TargetMachineRegistry.cpp
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@ -18,8 +18,34 @@
#include <algorithm>
using namespace llvm;
/// List - This is the main list of all of the registered target machines.
const TargetMachineRegistry::Entry *TargetMachineRegistry::List = 0;
/// Listeners - All of the listeners registered to get notified when new targets
/// are loaded.
static TargetRegistrationListener *Listeners = 0;
TargetMachineRegistry::Entry::Entry(const char *N, const char *SD,
TargetMachine *(*CF)(const Module &, IntrinsicLowering*),
unsigned (*MMF)(const Module &M), unsigned (*JMF)())
: Name(N), ShortDesc(SD), CtorFn(CF), ModuleMatchQualityFn(MMF),
JITMatchQualityFn(JMF), Next(List) {
List = this;
for (TargetRegistrationListener *L = Listeners; L; L = L->getNext())
L->targetRegistered(this);
}
TargetRegistrationListener::TargetRegistrationListener() {
Next = Listeners;
if (Next) Next->Prev = &Next;
Prev = &Listeners;
Listeners = this;
}
TargetRegistrationListener::~TargetRegistrationListener() {
*Prev = Next;
}
/// getClosestStaticTargetForModule - Given an LLVM module, pick the best target
/// that is compatible with the module. If no close target can be found, this
/// returns null and sets the Error string to a reason.