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Make the threshold a parameter

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26093 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-02-09 20:15:48 +00:00
parent f262766619
commit e487abbfbf
1 changed files with 7 additions and 3 deletions
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10
lib/Transforms/Scalar/LoopUnswitch.cpp
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@ -34,8 +34,9 @@
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Transforms/Utils/Cloning.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Support/Debug.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/CommandLine.h"
#include <algorithm>
#include <iostream>
#include <set>
@ -43,7 +44,10 @@ using namespace llvm;
namespace {
Statistic<> NumUnswitched("loop-unswitch", "Number of loops unswitched");
cl::opt<unsigned>
Threshold("loop-unswitch-threshold", cl::desc("Max loop size to unswitch"),
cl::init(10), cl::Hidden);
class LoopUnswitch : public FunctionPass {
LoopInfo *LI; // Loop information
public:
@ -145,7 +149,7 @@ bool LoopUnswitch::visitLoop(Loop *L) {
continue;
// Check to see if it would be profitable to unswitch this loop.
if (L->getBlocks().size() > 10) {
if (L->getBlocks().size() > Threshold) {
// FIXME: this should estimate growth by the amount of code shared by the
// resultant unswitched loops. This should have no code growth:
// for () { if (iv) {...} }