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Clean up and add comments to the newly implemented subtarget code.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22396 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-07-12 03:04:49 +00:00
parent d73e4608db
commit 8d2623d49a
1 changed files with 10 additions and 3 deletions
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13
include/llvm/Target/TargetMachine.h
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@ -64,6 +64,10 @@ protected: // Can only create subclasses...
///
TargetMachine(const std::string &name, IntrinsicLowering *IL,
const Module &M);
/// getSubtargetImpl - virtual method implemented by subclasses that returns
/// a reference to that target's TargetSubtarget-derived member variable.
virtual const TargetSubtarget *getSubtargetImpl() const { return 0; }
public:
virtual ~TargetMachine();
@ -98,11 +102,14 @@ public:
virtual const TargetFrameInfo *getFrameInfo() const { return 0; }
const TargetData &getTargetData() const { return DataLayout; }
virtual const TargetSubtarget *getSubtargetImpl() const { return 0; }
/// getSubtarget - This method returns a pointer to the specified type of
/// TargetSubtarget. In debug builds, it verifies that the object being
/// returned is of the correct type.
template<typename STC> STC *getSubtarget() const {
assert(getSubtargetImpl() && dynamic_cast<STC*>(getSubtargetImpl()) &&
const TargetSubtarget *TST = getSubtargetImpl();
assert(getSubtargetImpl() && dynamic_cast<STC*>(TST) &&
"Not the right kind of subtarget!");
return (STC*)getSubtargetImpl();
return (STC*)TST;
}
/// getRegisterInfo - If register information is available, return it. If