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Add a comment above findRepresentativeClass explaining why it's

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where it is so that future generations can understand.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231111 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2015-03-03 19:47:14 +00:00
parent dddc3986e3
commit 7b1d76b9e5
1 changed files with 4 additions and 0 deletions
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4
lib/CodeGen/TargetLoweringBase.cpp
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@ -1144,6 +1144,10 @@ TargetLoweringBase::emitPatchPoint(MachineInstr *MI,
/// findRepresentativeClass - Return the largest legal super-reg register class
/// of the register class for the specified type and its associated "cost".
// This function is in TargetLowering because it uses RegClassForVT which would
// need to be moved to TargetRegisterInfo and would necessitate moving
// isTypeLegal over as well - a massive change that would just require
// TargetLowering having a TargetRegisterInfo class member that it would use.
std::pair<const TargetRegisterClass *, uint8_t>
TargetLoweringBase::findRepresentativeClass(const TargetRegisterInfo *TRI,
MVT VT) const {