vendor/llvm/llvm-release_39-r276489

1 files changed, 43 insertions, 0 deletions

diff --git a/include/llvm/Analysis/IndirectCallSiteVisitor.h b/include/llvm/Analysis/IndirectCallSiteVisitor.h
new file mode 100644
index 0000000000000..71a8cb8863216
--- /dev/null
+++ b/include/llvm/Analysis/IndirectCallSiteVisitor.h
@@ -0,0 +1,43 @@
+//===-- IndirectCallSiteVisitor.h - indirect call-sites visitor -----------===//
+//
+//                      The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements defines a visitor class and a helper function that find
+// all indirect call-sites in a function.
+
+#include "llvm/IR/InstVisitor.h"
+#include <vector>
+
+namespace llvm {
+// Visitor class that finds all indirect call sites.
+struct PGOIndirectCallSiteVisitor
+    : public InstVisitor<PGOIndirectCallSiteVisitor> {
+  std::vector<Instruction *> IndirectCallInsts;
+  PGOIndirectCallSiteVisitor() {}
+
+  void visitCallSite(CallSite CS) {
+    if (CS.getCalledFunction() || !CS.getCalledValue())
+      return;
+    Instruction *I = CS.getInstruction();
+    if (CallInst *CI = dyn_cast<CallInst>(I)) {
+      if (CI->isInlineAsm())
+        return;
+    }
+    if (isa<Constant>(CS.getCalledValue()))
+      return;
+    IndirectCallInsts.push_back(I);
+  }
+};
+
+// Helper function that finds all indirect call sites.
+static inline std::vector<Instruction *> findIndirectCallSites(Function &F) {
+  PGOIndirectCallSiteVisitor ICV;
+  ICV.visit(F);
+  return ICV.IndirectCallInsts;
+}
+}