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optimize duplicate ValueMap lookups

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34599 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-02-25 18:40:32 +00:00
parent ce74de46dd
commit 251db1890c
1 changed files with 6 additions and 9 deletions
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15
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -661,17 +661,14 @@ SDOperand SelectionDAGLowering::getValue(const Value *V) {
return DAG.getFrameIndex(SI->second, TLI.getPointerTy());
}
DenseMap<const Value*, unsigned>::iterator VMI =
FuncInfo.ValueMap.find(V);
assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!");
unsigned InReg = VMI->second;
unsigned InReg = FuncInfo.ValueMap[V];
assert(InReg && "Value not in map!");
// If this type is not legal, make it so now.
if (VT != MVT::Vector) {
if (TLI.getTypeAction(VT) == TargetLowering::Expand) {
// Source must be expanded. This input value is actually coming from the
// register pair VMI->second and VMI->second+1.
// register pair InReg and InReg+1.
MVT::ValueType DestVT = TLI.getTypeToExpandTo(VT);
unsigned NumVals = TLI.getNumElements(VT);
N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT);
@ -4189,9 +4186,9 @@ LowerArguments(BasicBlock *LLVMBB, SelectionDAGLowering &SDL,
// If this argument is live outside of the entry block, insert a copy from
// whereever we got it to the vreg that other BB's will reference it as.
if (FuncInfo.ValueMap.count(AI)) {
SDOperand Copy =
SDL.CopyValueToVirtualRegister(AI, FuncInfo.ValueMap[AI]);
DenseMap<const Value*, unsigned>::iterator VMI=FuncInfo.ValueMap.find(AI);
if (VMI != FuncInfo.ValueMap.end()) {
SDOperand Copy = SDL.CopyValueToVirtualRegister(AI, VMI->second);
UnorderedChains.push_back(Copy);
}
}