1 files changed, 105 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Transforms/IPO/InlineSimple.cpp b/contrib/llvm/lib/Transforms/IPO/InlineSimple.cpp
new file mode 100644
index 0000000..9b01d81
--- /dev/null
+++ b/contrib/llvm/lib/Transforms/IPO/InlineSimple.cpp
@@ -0,0 +1,105 @@
+//===- InlineSimple.cpp - Code to perform simple function inlining --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements bottom-up inlining of functions into callees.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Analysis/AliasAnalysis.h"
+#include "llvm/Analysis/AssumptionCache.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Analysis/InlineCost.h"
+#include "llvm/IR/CallSite.h"
+#include "llvm/IR/CallingConv.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/IntrinsicInst.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Transforms/IPO/InlinerPass.h"
+
+using namespace llvm;
+
+#define DEBUG_TYPE "inline"
+
+namespace {
+
+/// \brief Actual inliner pass implementation.
+///
+/// The common implementation of the inlining logic is shared between this
+/// inliner pass and the always inliner pass. The two passes use different cost
+/// analyses to determine when to inline.
+class SimpleInliner : public Inliner {
+  InlineCostAnalysis *ICA;
+
+public:
+  SimpleInliner() : Inliner(ID), ICA(nullptr) {
+    initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+  }
+
+  SimpleInliner(int Threshold)
+      : Inliner(ID, Threshold, /*InsertLifetime*/ true), ICA(nullptr) {
+    initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+  }
+
+  static char ID; // Pass identification, replacement for typeid
+
+  InlineCost getInlineCost(CallSite CS) override {
+    return ICA->getInlineCost(CS, getInlineThreshold(CS));
+  }
+
+  bool runOnSCC(CallGraphSCC &SCC) override;
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+};
+
+static int computeThresholdFromOptLevels(unsigned OptLevel,
+                                         unsigned SizeOptLevel) {
+  if (OptLevel > 2)
+    return 275;
+  if (SizeOptLevel == 1) // -Os
+    return 75;
+  if (SizeOptLevel == 2) // -Oz
+    return 25;
+  return 225;
+}
+
+} // end anonymous namespace
+
+char SimpleInliner::ID = 0;
+INITIALIZE_PASS_BEGIN(SimpleInliner, "inline",
+                "Function Integration/Inlining", false, false)
+INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
+INITIALIZE_PASS_DEPENDENCY(AssumptionCacheTracker)
+INITIALIZE_PASS_DEPENDENCY(CallGraphWrapperPass)
+INITIALIZE_PASS_DEPENDENCY(InlineCostAnalysis)
+INITIALIZE_PASS_END(SimpleInliner, "inline",
+                "Function Integration/Inlining", false, false)
+
+Pass *llvm::createFunctionInliningPass() { return new SimpleInliner(); }
+
+Pass *llvm::createFunctionInliningPass(int Threshold) {
+  return new SimpleInliner(Threshold);
+}
+
+Pass *llvm::createFunctionInliningPass(unsigned OptLevel,
+                                       unsigned SizeOptLevel) {
+  return new SimpleInliner(
+      computeThresholdFromOptLevels(OptLevel, SizeOptLevel));
+}
+
+bool SimpleInliner::runOnSCC(CallGraphSCC &SCC) {
+  ICA = &getAnalysis<InlineCostAnalysis>();
+  return Inliner::runOnSCC(SCC);
+}
+
+void SimpleInliner::getAnalysisUsage(AnalysisUsage &AU) const {
+  AU.addRequired<InlineCostAnalysis>();
+  Inliner::getAnalysisUsage(AU);
+}