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Bump up pattern cost if the resulting instruction is marked

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usesCustomDAGSchedInserter.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26282 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-02-18 02:33:09 +00:00
parent 6428302f3d
commit fbad70808c
1 changed files with 14 additions and 7 deletions
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21
utils/TableGen/DAGISelEmitter.cpp
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@ -1749,12 +1749,19 @@ static unsigned getPatternSize(TreePatternNode *P, DAGISelEmitter &ISE) {
/// getResultPatternCost - Compute the number of instructions for this pattern.
/// This is a temporary hack. We should really include the instruction
/// latencies in this calculation.
static unsigned getResultPatternCost(TreePatternNode *P) {
static unsigned getResultPatternCost(TreePatternNode *P, DAGISelEmitter &ISE) {
if (P->isLeaf()) return 0;
unsigned Cost = P->getOperator()->isSubClassOf("Instruction");
unsigned Cost = 0;
Record *Op = P->getOperator();
if (Op->isSubClassOf("Instruction")) {
Cost++;
CodeGenInstruction &II = ISE.getTargetInfo().getInstruction(Op->getName());
if (II.usesCustomDAGSchedInserter)
Cost += 10;
}
for (unsigned i = 0, e = P->getNumChildren(); i != e; ++i)
Cost += getResultPatternCost(P->getChild(i));
Cost += getResultPatternCost(P->getChild(i), ISE);
return Cost;
}
@ -1773,8 +1780,8 @@ struct PatternSortingPredicate {
if (LHSSize < RHSSize) return false;
// If the patterns have equal complexity, compare generated instruction cost
return getResultPatternCost(LHS->getDstPattern()) <
getResultPatternCost(RHS->getDstPattern());
return getResultPatternCost(LHS->getDstPattern(), ISE) <
getResultPatternCost(RHS->getDstPattern(), ISE);
}
};
@ -2748,7 +2755,7 @@ void DAGISelEmitter::EmitPatterns(std::vector<std::pair<PatternToMatch*,
OS << "\n";
OS << std::string(Indent, ' ') << "// Pattern complexity = "
<< getPatternSize(Pattern.getSrcPattern(), *this) << " cost = "
<< getResultPatternCost(Pattern.getDstPattern()) << "\n";
<< getResultPatternCost(Pattern.getDstPattern(), *this) << "\n";
}
if (!FirstCodeLine.first) {
OS << std::string(Indent, ' ') << "{\n";
@ -2769,7 +2776,7 @@ void DAGISelEmitter::EmitPatterns(std::vector<std::pair<PatternToMatch*,
OS << "\n";
OS << std::string(Indent, ' ') << "// Pattern complexity = "
<< getPatternSize(Pattern.getSrcPattern(), *this) << " cost = "
<< getResultPatternCost(Pattern.getDstPattern()) << "\n";
<< getResultPatternCost(Pattern.getDstPattern(), *this) << "\n";
}
EmitPatterns(Other, Indent, OS);
return;