From e487abbfbf9fdef21e5216379b2e74436ef99c7b Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Thu, 9 Feb 2006 20:15:48 +0000 Subject: [PATCH] Make the threshold a parameter git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26093 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/LoopUnswitch.cpp | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp index 3cdfd473815..850be78f808 100644 --- a/lib/Transforms/Scalar/LoopUnswitch.cpp +++ b/lib/Transforms/Scalar/LoopUnswitch.cpp @@ -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 #include #include @@ -43,7 +44,10 @@ using namespace llvm; namespace { Statistic<> NumUnswitched("loop-unswitch", "Number of loops unswitched"); - + cl::opt + 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) {...} }