Use the new CodeMetrics class to compute code size instead of
manually counting instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84016 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LoopUnswitch.cpp b/lib/Transforms/Scalar/LoopUnswitch.cpp
index f116d53..624f240 100644
--- a/lib/Transforms/Scalar/LoopUnswitch.cpp
+++ b/lib/Transforms/Scalar/LoopUnswitch.cpp
@@ -34,6 +34,7 @@
#include "llvm/Instructions.h"
#include "llvm/LLVMContext.h"
#include "llvm/Analysis/ConstantFolding.h"
+#include "llvm/Analysis/InlineCost.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/LoopPass.h"
#include "llvm/Analysis/Dominators.h"
@@ -408,15 +409,14 @@
if (IsTrivialUnswitchCondition(LIC))
return 0;
- // FIXME: This is really overly conservative and brain dead.
- unsigned Cost = 0;
+ // FIXME: This is overly conservative because it does not take into
+ // consideration code simplification opportunities.
+ CodeMetrics Metrics;
for (Loop::block_iterator I = currentLoop->block_begin(),
E = currentLoop->block_end();
I != E; ++I)
- // Count instructions.
- Cost += (*I)->size();
-
- return Cost;
+ Metrics.analyzeBasicBlock(*I);
+ return Metrics.NumInsts;
}
/// UnswitchIfProfitable - We have found that we can unswitch currentLoop when