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60f19e2f50
Direct callees' that are cast to other function prototypes, show up in the Call/Invoke instructions as ConstantExpr's. Currently llvm::CallSite's getCalledFunction() fails to return the callees in such expressions as direct calls. Value profiling should avoid instrumenting such cases. Mostly NFC. llvm-svn: 265330
44 lines
1.3 KiB
C++
44 lines
1.3 KiB
C++
//===-- IndirectCallSiteVisitor.h - indirect call-sites visitor -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements defines a visitor class and a helper function that find
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// all indirect call-sites in a function.
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#include "llvm/IR/InstVisitor.h"
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#include <vector>
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namespace llvm {
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// Visitor class that finds all indirect call sites.
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struct PGOIndirectCallSiteVisitor
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: public InstVisitor<PGOIndirectCallSiteVisitor> {
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std::vector<Instruction *> IndirectCallInsts;
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PGOIndirectCallSiteVisitor() {}
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void visitCallSite(CallSite CS) {
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if (CS.getCalledFunction() || !CS.getCalledValue())
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return;
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Instruction *I = CS.getInstruction();
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if (CallInst *CI = dyn_cast<CallInst>(I)) {
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if (CI->isInlineAsm())
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return;
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}
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if (isa<Constant>(CS.getCalledValue()))
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return;
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IndirectCallInsts.push_back(I);
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}
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};
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// Helper function that finds all indirect call sites.
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static inline std::vector<Instruction *> findIndirectCallSites(Function &F) {
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PGOIndirectCallSiteVisitor ICV;
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ICV.visit(F);
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return ICV.IndirectCallInsts;
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}
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}
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