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Teach the DAGISelEmitter to not compute the variable_ops operand

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index for the input pattern in terms of the output pattern. Instead
keep track of how many fixed operands the input pattern actually
has, and have the input matching code pass the output-emitting
function that index value. This simplifies the code, disentangles
variables_ops from the support for predication operations, and
makes variable_ops more robust.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@51808 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2008-05-31 02:11:25 +00:00
parent 2830741866
commit e4c67cdab4
8 changed files with 59 additions and 56 deletions
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utils/TableGen/CodeGenDAGPatterns.cpp
-2
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@@ -916,8 +916,6 @@ bool TreePatternNode::ApplyTypeConstraints(TreePattern &TP, bool NotRegisters) {
MadeChange |= Child->UpdateNodeType(MVT::iPTR, TP);
} else if (OperandNode->getName() == "unknown") {
MadeChange |= Child->UpdateNodeType(MVT::isUnknown, TP);
} else if (OperandNode->getName() == "discard") {
MadeChange |= Child->UpdateNodeType(MVT::isUnknown, TP);
} else {
assert(0 && "Unknown operand type!");
abort();