summaryrefslogtreecommitdiffstats
path: root/include/llvm/Transforms
diff options
context:
space:
mode:
authorrdivacky <rdivacky@FreeBSD.org>2009-10-15 16:26:17 +0000
committerrdivacky <rdivacky@FreeBSD.org>2009-10-15 16:26:17 +0000
commit1adacceba9c9ee0f16e54388e56c9a249b296f75 (patch)
treefbc3e1401bc9623b861166be5940c750f5ca52da /include/llvm/Transforms
parent5effb5c6a161c1bdbdd9585dfdc97a6105e3df66 (diff)
downloadFreeBSD-src-1adacceba9c9ee0f16e54388e56c9a249b296f75.zip
FreeBSD-src-1adacceba9c9ee0f16e54388e56c9a249b296f75.tar.gz
Delete all stale files.
Diffstat (limited to 'include/llvm/Transforms')
-rw-r--r--include/llvm/Transforms/Utils/InlineCost.h155
1 files changed, 0 insertions, 155 deletions
diff --git a/include/llvm/Transforms/Utils/InlineCost.h b/include/llvm/Transforms/Utils/InlineCost.h
deleted file mode 100644
index f275b76..0000000
--- a/include/llvm/Transforms/Utils/InlineCost.h
+++ /dev/null
@@ -1,155 +0,0 @@
-//===- InlineCost.cpp - Cost analysis for inliner ---------------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements heuristics for inlining decisions.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_TRANSFORMS_UTILS_INLINECOST_H
-#define LLVM_TRANSFORMS_UTILS_INLINECOST_H
-
-#include "llvm/ADT/SmallPtrSet.h"
-#include <cassert>
-#include <climits>
-#include <map>
-#include <vector>
-
-namespace llvm {
-
- class Value;
- class Function;
- class CallSite;
-
- /// InlineCost - Represent the cost of inlining a function. This
- /// supports special values for functions which should "always" or
- /// "never" be inlined. Otherwise, the cost represents a unitless
- /// amount; smaller values increase the likelyhood of the function
- /// being inlined.
- class InlineCost {
- enum Kind {
- Value,
- Always,
- Never
- };
-
- // This is a do-it-yourself implementation of
- // int Cost : 30;
- // unsigned Type : 2;
- // We used to use bitfields, but they were sometimes miscompiled (PR3822).
- enum { TYPE_BITS = 2 };
- enum { COST_BITS = unsigned(sizeof(unsigned)) * CHAR_BIT - TYPE_BITS };
- unsigned TypedCost; // int Cost : COST_BITS; unsigned Type : TYPE_BITS;
-
- Kind getType() const {
- return Kind(TypedCost >> COST_BITS);
- }
-
- int getCost() const {
- // Sign-extend the bottom COST_BITS bits.
- return (int(TypedCost << TYPE_BITS)) >> TYPE_BITS;
- }
-
- InlineCost(int C, int T) {
- TypedCost = (unsigned(C << TYPE_BITS) >> TYPE_BITS) | (T << COST_BITS);
- assert(getCost() == C && "Cost exceeds InlineCost precision");
- }
- public:
- static InlineCost get(int Cost) { return InlineCost(Cost, Value); }
- static InlineCost getAlways() { return InlineCost(0, Always); }
- static InlineCost getNever() { return InlineCost(0, Never); }
-
- bool isVariable() const { return getType() == Value; }
- bool isAlways() const { return getType() == Always; }
- bool isNever() const { return getType() == Never; }
-
- /// getValue() - Return a "variable" inline cost's amount. It is
- /// an error to call this on an "always" or "never" InlineCost.
- int getValue() const {
- assert(getType() == Value && "Invalid access of InlineCost");
- return getCost();
- }
- };
-
- /// InlineCostAnalyzer - Cost analyzer used by inliner.
- class InlineCostAnalyzer {
- struct ArgInfo {
- public:
- unsigned ConstantWeight;
- unsigned AllocaWeight;
-
- ArgInfo(unsigned CWeight, unsigned AWeight)
- : ConstantWeight(CWeight), AllocaWeight(AWeight) {}
- };
-
- // FunctionInfo - For each function, calculate the size of it in blocks and
- // instructions.
- struct FunctionInfo {
- /// NeverInline - True if this callee should never be inlined into a
- /// caller.
- bool NeverInline;
-
- /// usesDynamicAlloca - True if this function calls alloca (in the C sense).
- bool usesDynamicAlloca;
-
- /// NumInsts, NumBlocks - Keep track of how large each function is, which
- /// is used to estimate the code size cost of inlining it.
- unsigned NumInsts, NumBlocks;
-
- /// NumVectorInsts - Keep track of how many instructions produce vector
- /// values. The inliner is being more aggressive with inlining vector
- /// kernels.
- unsigned NumVectorInsts;
-
- /// ArgumentWeights - Each formal argument of the function is inspected to
- /// see if it is used in any contexts where making it a constant or alloca
- /// would reduce the code size. If so, we add some value to the argument
- /// entry here.
- std::vector<ArgInfo> ArgumentWeights;
-
- FunctionInfo() : NeverInline(false), usesDynamicAlloca(false), NumInsts(0),
- NumBlocks(0), NumVectorInsts(0) {}
-
- /// analyzeFunction - Fill in the current structure with information
- /// gleaned from the specified function.
- void analyzeFunction(Function *F);
-
- /// CountCodeReductionForConstant - Figure out an approximation for how
- /// many instructions will be constant folded if the specified value is
- /// constant.
- unsigned CountCodeReductionForConstant(Value *V);
-
- /// CountCodeReductionForAlloca - Figure out an approximation of how much
- /// smaller the function will be if it is inlined into a context where an
- /// argument becomes an alloca.
- ///
- unsigned CountCodeReductionForAlloca(Value *V);
- };
-
- std::map<const Function *, FunctionInfo> CachedFunctionInfo;
-
- public:
-
- /// getInlineCost - The heuristic used to determine if we should inline the
- /// function call or not.
- ///
- InlineCost getInlineCost(CallSite CS,
- SmallPtrSet<const Function *, 16> &NeverInline);
-
- /// getInlineFudgeFactor - Return a > 1.0 factor if the inliner should use a
- /// higher threshold to determine if the function call should be inlined.
- float getInlineFudgeFactor(CallSite CS);
-
- /// resetCachedFunctionInfo - erase any cached cost info for this function.
- void resetCachedCostInfo(Function* Caller) {
- CachedFunctionInfo[Caller].NumBlocks = 0;
- }
- };
-}
-
-#endif
OpenPOWER on IntegriCloud