[llvm-commits] CVS: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp

[Chris Lattner]

Changes in directory llvm/lib/CodeGen/SelectionDAG:

LegalizeDAG.cpp updated: 1.467 -> 1.468
---
Log message:

Eliminate some malloc traffic from LegalizeAllNodesNotLeadingTo, speeding
up isel on kimwitu by 0.7%.


---
Diffs of the changes:  (+5 -4)

 LegalizeDAG.cpp |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)


Index: llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
diff -u llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.467 
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.468
--- llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp:1.467 Fri Feb  2 19:12:36 2007
+++ llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp       Sat Feb  3 18:27:56 2007
@@ -27,6 +27,7 @@
 #include "llvm/Support/Compiler.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
 #include <map>
 using namespace llvm;
 
@@ -182,7 +183,7 @@
   SDNode *isShuffleLegal(MVT::ValueType VT, SDOperand Mask) const;
   
   bool LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode *Dest,
-                                    std::set<SDNode*> &NodesLeadingTo);
+                                    SmallPtrSet<SDNode*, 32> &NodesLeadingTo);
 
   void LegalizeSetCCOperands(SDOperand &LHS, SDOperand &RHS, SDOperand &CC);
     
@@ -416,7 +417,7 @@
 /// NodesLeadingTo.  This avoids retraversing them exponential number of times.
 ///
 bool SelectionDAGLegalize::LegalizeAllNodesNotLeadingTo(SDNode *N, SDNode 
*Dest,
-                                            std::set<SDNode*> &NodesLeadingTo) 
{
+                                     SmallPtrSet<SDNode*, 32> &NodesLeadingTo) 
{
   if (N == Dest) return true;  // N certainly leads to Dest :)
   
   // If we've already processed this node and it does lead to Dest, there is no
@@ -1119,7 +1120,7 @@
     // Recursively Legalize all of the inputs of the call end that do not lead
     // to this call start.  This ensures that any libcalls that need be 
inserted
     // are inserted *before* the CALLSEQ_START.
-    {std::set<SDNode*> NodesLeadingTo;
+    {SmallPtrSet<SDNode*, 32> NodesLeadingTo;
     for (unsigned i = 0, e = CallEnd->getNumOperands(); i != e; ++i)
       LegalizeAllNodesNotLeadingTo(CallEnd->getOperand(i).Val, Node,
                                    NodesLeadingTo);
@@ -2072,7 +2073,7 @@
       // Allow SETCC to not be supported for all legal data types
       // Mostly this targets FP
       MVT::ValueType NewInTy = Node->getOperand(0).getValueType();
-      MVT::ValueType OldVT = NewInTy;
+      MVT::ValueType OldVT = NewInTy; OldVT = OldVT;
 
       // Scan for the appropriate larger type to use.
       while (1) {



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