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Change the interface to the type legalization method

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ReplaceNodeResults: rather than returning a node which
must have the same number of results as the original
node (which means mucking around with MERGE_VALUES,
and which is also easy to get wrong since SelectionDAG
folding may mean you don't get the node you expect),
return the results in a vector.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60348 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands
2008-12-01 11:39:25 +00:00
parent d54d86038d
commit 1607f05cb7
20 changed files with 377 additions and 378 deletions
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15
include/llvm/Target/TargetLowering.h
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@@ -1130,17 +1130,18 @@ public:
/// implement this. The default implementation of this aborts.
virtual SDValue LowerOperation(SDValue Op, SelectionDAG &DAG);
/// ReplaceNodeResults - This callback is invoked for operations that are
/// unsupported by the target, which are registered to use 'custom' lowering,
/// and whose result type is illegal. This must return a node whose results
/// precisely match the results of the input node. This typically involves a
/// MERGE_VALUES node and/or BUILD_PAIR.
/// ReplaceNodeResults - This callback is invoked when a node result type is
/// illegal for the target, and the operation was registered to use 'custom'
/// lowering for that result type. The target places new result values for
/// the node in Results (their number and types must exactly match those of
/// the original return values of the node), or leaves Results empty, which
/// indicates that the node is not to be custom lowered after all.
///
/// If the target has no operations that require custom lowering, it need not
/// implement this. The default implementation aborts.
virtual SDNode *ReplaceNodeResults(SDNode *N, SelectionDAG &DAG) {
virtual void ReplaceNodeResults(SDNode *N, SmallVectorImpl<SDValue> &Results,
SelectionDAG &DAG) {
assert(0 && "ReplaceNodeResults not implemented for this target!");
return 0;
}
/// IsEligibleForTailCallOptimization - Check whether the call is eligible for