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Add support to the InstVisitor for visiting a generic callsite. The

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visitor will now visit a CallInst and an InvokeInst with
instruction-specific visitors, then visit a generic CallSite visitor,
then delegate back to the Instruction visitor and the TerminatorInst
visitors depending on whether a call or an invoke originally. This will
be used in the soon-to-land inline cost rewrite.

llvm-svn: 153811
This commit is contained in:
Chandler Carruth 2012-03-31 11:31:24 +00:00
parent c0128a5e70
commit 0077a46c37
1 changed files with 23 additions and 2 deletions
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25
include/llvm/Support/InstVisitor.h
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@ -14,6 +14,7 @@
#include "llvm/Function.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Support/ErrorHandling.h"
namespace llvm {
@ -161,7 +162,6 @@ public:
RetTy visitBranchInst(BranchInst &I) { DELEGATE(TerminatorInst);}
RetTy visitSwitchInst(SwitchInst &I) { DELEGATE(TerminatorInst);}
RetTy visitIndirectBrInst(IndirectBrInst &I) { DELEGATE(TerminatorInst);}
RetTy visitInvokeInst(InvokeInst &I) { DELEGATE(TerminatorInst);}
RetTy visitResumeInst(ResumeInst &I) { DELEGATE(TerminatorInst);}
RetTy visitUnreachableInst(UnreachableInst &I) { DELEGATE(TerminatorInst);}
RetTy visitICmpInst(ICmpInst &I) { DELEGATE(CmpInst);}
@ -187,7 +187,6 @@ public:
RetTy visitIntToPtrInst(IntToPtrInst &I) { DELEGATE(CastInst);}
RetTy visitBitCastInst(BitCastInst &I) { DELEGATE(CastInst);}
RetTy visitSelectInst(SelectInst &I) { DELEGATE(Instruction);}
RetTy visitCallInst(CallInst &I) { DELEGATE(Instruction);}
RetTy visitVAArgInst(VAArgInst &I) { DELEGATE(UnaryInstruction);}
RetTy visitExtractElementInst(ExtractElementInst &I) { DELEGATE(Instruction);}
RetTy visitInsertElementInst(InsertElementInst &I) { DELEGATE(Instruction);}
@ -196,6 +195,15 @@ public:
RetTy visitInsertValueInst(InsertValueInst &I) { DELEGATE(Instruction); }
RetTy visitLandingPadInst(LandingPadInst &I) { DELEGATE(Instruction); }
// Call and Invoke are slightly different as they delegate first through
// a generic CallSite visitor.
RetTy visitCallInst(CallInst &I) {
return static_cast<SubClass*>(this)->visitCallSite(&I);
}
RetTy visitInvokeInst(InvokeInst &I) {
return static_cast<SubClass*>(this)->visitCallSite(&I);
}
// Next level propagators: If the user does not overload a specific
// instruction type, they can overload one of these to get the whole class
// of instructions...
@ -206,6 +214,19 @@ public:
RetTy visitTerminatorInst(TerminatorInst &I) { DELEGATE(Instruction);}
RetTy visitUnaryInstruction(UnaryInstruction &I){ DELEGATE(Instruction);}
// Provide a special visitor for a 'callsite' that visits both calls and
// invokes. When unimplemented, properly delegates to either the terminator or
// regular instruction visitor.
RetTy visitCallSite(CallSite CS) {
assert(CS);
Instruction &I = *CS.getInstruction();
if (CS.isCall())
DELEGATE(Instruction);
assert(CS.isInvoke());
DELEGATE(TerminatorInst);
}
// If the user wants a 'default' case, they can choose to override this
// function. If this function is not overloaded in the user's subclass, then
// this instruction just gets ignored.