Changes in directory llvm/lib/Transforms/Scalar:
LCSSA.cpp updated: 1.3 -> 1.4
---
Log message:
A few small clean-ups, and the addition of an LCSSA statistic.
---
Diffs of the changes: (+8 -2)
LCSSA.cpp | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
Index: llvm/lib/Transforms/Scalar/LCSSA.cpp
diff -u llvm/lib/Transforms/Scalar/LCSSA.cpp:1.3
llvm/lib/Transforms/Scalar/LCSSA.cpp:1.4
--- llvm/lib/Transforms/Scalar/LCSSA.cpp:1.3 Fri May 26 16:19:17 2006
+++ llvm/lib/Transforms/Scalar/LCSSA.cpp Fri May 26 19:31:37 2006
@@ -31,18 +31,22 @@
#include "llvm/Pass.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
+#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Support/CFG.h"
#include <algorithm>
-#include <set>
#include <vector>
using namespace llvm;
namespace {
+ static Statistic<> NumLCSSA("lcssa", "Number of times LCSSA was applied");
+
class LCSSA : public FunctionPass {
public:
+
+
LoopInfo *LI; // Loop information
DominatorTree *DT; // Dominator Tree for the current Loop...
DominanceFrontier *DF; // Current Dominance Frontier
@@ -51,7 +55,8 @@
bool visitSubloop(Loop* L);
/// This transformation requires natural loop information & requires that
- /// loop preheaders be inserted into the CFG...
+ /// loop preheaders be inserted into the CFG. It maintains both of these,
+ /// as well as the CFG. It also requires dominator information.
///
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
@@ -102,6 +107,7 @@
for (std::set<Instruction*>::iterator I = AffectedValues.begin(),
E = AffectedValues.end(); I != E; ++I) {
+ ++NumLCSSA; // We are applying the transformation
for (std::vector<BasicBlock*>::iterator BBI = exitBlocks.begin(),
BBE = exitBlocks.end(); BBI != BBE; ++BBI) {
PHINode *phi = new PHINode((*I)->getType(), "lcssa");
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