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Eliminate some malloc traffic from LegalizeAllNodesNotLeadingTo, speeding

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up isel on kimwitu by 0.7%.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33853 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-04 00:27:56 +00:00
parent d48c5e871a
commit 00755df36c
1 changed files with 5 additions and 4 deletions
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9
lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -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 @@ private:
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 @@ static SDNode *FindCallStartFromCallEnd(SDNode *Node) {
/// 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 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// 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 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
// 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) {