mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
9a1581b910
on RAUW of functions, this is a correctness issue instead of a mere memory usage problem. No testcase until the new MergeFunctions can land. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103653 91177308-0d34-0410-b5e6-96231b3b80d8
112 lines
3.2 KiB
C++
112 lines
3.2 KiB
C++
//===- 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/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) {}
|
|
SimpleInliner(int Threshold) : Inliner(&ID, Threshold) {}
|
|
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;
|
|
static RegisterPass<SimpleInliner>
|
|
X("inline", "Function Integration/Inlining");
|
|
|
|
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) {
|
|
|
|
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;
|
|
}
|
|
|