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Fix a bug in legalize where it would emit two calls to libcalls that return 

i64 values on targets that need that expanded to 32-bit registers.  This fixes
PowerPC/2005-09-02-LegalizeDuplicatesCalls.ll and speeds up 189.lucas from
taking 122.72s to 81.96s on my desktop.

llvm-svn: 23228
This commit is contained in:
Chris Lattner 2005-09-02 20:26:58 +00:00
parent 63fab495bb
commit 630226697f
1 changed files with 13 additions and 10 deletions
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23
llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
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@ -1996,7 +1996,7 @@ SDOperand SelectionDAGLegalize::PromoteOp(SDOperand Op) {
SDOperand Result;
SDNode *Node = Op.Val;
if (!Node->hasOneUse()) {
if (1 || !Node->hasOneUse()) {
std::map<SDOperand, SDOperand>::iterator I = PromotedNodes.find(Op);
if (I != PromotedNodes.end()) return I->second;
} else {
@ -2709,21 +2709,24 @@ SDOperand SelectionDAGLegalize::ExpandLibCall(const char *Name, SDNode *Node,
std::pair<SDOperand,SDOperand> CallInfo =
TLI.LowerCallTo(InChain, RetTy, false, CallingConv::C, false,
Callee, Args, DAG);
SpliceCallInto(CallInfo.second, OutChain);
NeedsAnotherIteration = true;
SDOperand Result;
switch (getTypeAction(CallInfo.first.getValueType())) {
default: assert(0 && "Unknown thing");
case Legal:
return CallInfo.first;
Result = CallInfo.first;
break;
case Promote:
assert(0 && "Cannot promote this yet!");
case Expand:
SDOperand Lo;
ExpandOp(CallInfo.first, Lo, Hi);
return Lo;
ExpandOp(CallInfo.first, Result, Hi);
CallInfo.second = LegalizeOp(CallInfo.second);
break;
}
SpliceCallInto(CallInfo.second, OutChain);
NeedsAnotherIteration = true;
return Result;
}
@ -2845,7 +2848,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
// If there is more than one use of this, see if we already expanded it.
// There is no use remembering values that only have a single use, as the map
// entries will never be reused.
if (!Node->hasOneUse()) {
if (1 || !Node->hasOneUse()) {
std::map<SDOperand, std::pair<SDOperand, SDOperand> >::iterator I
= ExpandedNodes.find(Op);
if (I != ExpandedNodes.end()) {
@ -3259,7 +3262,7 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){
}
// Remember in a map if the values will be reused later.
if (!Node->hasOneUse()) {
if (1 || !Node->hasOneUse()) {
bool isNew = ExpandedNodes.insert(std::make_pair(Op,
std::make_pair(Lo, Hi))).second;
assert(isNew && "Value already expanded?!?");