1 files changed, 120 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..84dd4fd
--- /dev/null
+++ b/contrib/llvm/lib/Transforms/IPO/InlineSimple.cpp
@@ -0,0 +1,120 @@
+//===- 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.
+//
+//===----------------------------------------------------------------------===//
+
+#define DEBUG_TYPE "inline"
+#include "llvm/CallingConv.h"
+#include "llvm/Instructions.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/Module.h"
+#include "llvm/Type.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Analysis/InlineCost.h"
+#include "llvm/Support/CallSite.h"
+#include "llvm/Transforms/IPO.h"
+#include "llvm/Transforms/IPO/InlinerPass.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/ADT/SmallPtrSet.h"
+
+using namespace llvm;
+
+namespace {
+
+  class SimpleInliner : public Inliner {
+    // Functions that are never inlined
+    SmallPtrSet<const Function*, 16> NeverInline;
+    InlineCostAnalyzer CA;
+  public:
+    SimpleInliner() : Inliner(ID) {
+      initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+    }
+    SimpleInliner(int Threshold) : Inliner(ID, Threshold) {
+      initializeSimpleInlinerPass(*PassRegistry::getPassRegistry());
+    }
+    static char ID; // Pass identification, replacement for typeid
+    InlineCost getInlineCost(CallSite CS) {
+      return CA.getInlineCost(CS, NeverInline);
+    }
+    float getInlineFudgeFactor(CallSite CS) {
+      return CA.getInlineFudgeFactor(CS);
+    }
+    void resetCachedCostInfo(Function *Caller) {
+      CA.resetCachedCostInfo(Caller);
+    }
+    void growCachedCostInfo(Function* Caller, Function* Callee) {
+      CA.growCachedCostInfo(Caller, Callee);
+    }
+    virtual bool doInitialization(CallGraph &CG);
+    void releaseMemory() {
+      CA.clear();
+    }
+  };
+}
+
+char SimpleInliner::ID = 0;
+INITIALIZE_PASS_BEGIN(SimpleInliner, "inline",
+                "Function Integration/Inlining", false, false)
+INITIALIZE_AG_DEPENDENCY(CallGraph)
+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);
+}
+
+// doInitialization - Initializes the vector of functions that have been
+// annotated with the noinline attribute.
+bool SimpleInliner::doInitialization(CallGraph &CG) {
+  CA.setTargetData(getAnalysisIfAvailable<TargetData>());
+
+  Module &M = CG.getModule();
+
+  for (Module::iterator I = M.begin(), E = M.end();
+       I != E; ++I)
+    if (!I->isDeclaration() && I->hasFnAttr(Attribute::NoInline))
+      NeverInline.insert(I);
+
+  // Get llvm.noinline
+  GlobalVariable *GV = M.getNamedGlobal("llvm.noinline");
+
+  if (GV == 0)
+    return false;
+
+  // Don't crash on invalid code
+  if (!GV->hasDefinitiveInitializer())
+    return false;
+
+  const ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
+
+  if (InitList == 0)
+    return false;
+
+  // Iterate over each element and add to the NeverInline set
+  for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
+
+    // Get Source
+    const Constant *Elt = InitList->getOperand(i);
+
+    if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(Elt))
+      if (CE->getOpcode() == Instruction::BitCast)
+        Elt = CE->getOperand(0);
+
+    // Insert into set of functions to never inline
+    if (const Function *F = dyn_cast<Function>(Elt))
+      NeverInline.insert(F);
+  }
+
+  return false;
+}
+