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For some LLVM-as-library uses it is convenient to create a

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subclass of TargetMachine which "forwards" all operations to an
existing internal TargetMachine member variable. In the usage context the
specific-machine class derived from TargetMachine is not visible,
only a reference to the generic base class TargetMachine. Although
getSubtargetImpl() is public in specific-machine classes derived from
TargetMachine, the TargetMachine class unfortunately has
getSubtargetImpl() protected (and accessing non-const members makes
abusing getSubtarget() unsuitable). Making it public in the base class
allows this forwarding pattern.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171976 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Tweed 2013-01-09 16:21:47 +00:00
parent a7303360ae
commit 73b984530f
1 changed files with 4 additions and 4 deletions
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8
include/llvm/Target/TargetMachine.h
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@ -59,10 +59,6 @@ protected: // Can only create subclasses.
TargetMachine(const Target &T, StringRef TargetTriple,
StringRef CPU, StringRef FS, const TargetOptions &Options);
/// getSubtargetImpl - virtual method implemented by subclasses that returns
/// a reference to that target's TargetSubtargetInfo-derived member variable.
virtual const TargetSubtargetInfo *getSubtargetImpl() const { return 0; }
/// TheTarget - The Target that this machine was created for.
const Target &TheTarget;
@ -95,6 +91,10 @@ public:
const StringRef getTargetCPU() const { return TargetCPU; }
const StringRef getTargetFeatureString() const { return TargetFS; }
/// getSubtargetImpl - virtual method implemented by subclasses that returns
/// a reference to that target's TargetSubtargetInfo-derived member variable.
virtual const TargetSubtargetInfo *getSubtargetImpl() const { return 0; }
TargetOptions Options;
// Interfaces to the major aspects of target machine information: