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| author | Eric Christopher <echristo@gmail.com> | 2015-03-03 19:47:14 +0000 |
|---|---|---|
| committer | Eric Christopher <echristo@gmail.com> | 2015-03-03 19:47:14 +0000 |
| commit | 720ab84ba2f7c4c748fb9295110ae35be0d7c9cb (patch) | |
| tree | 0030f4aa47dd5e0e8da066f953de0e4d11b034f1 /llvm/lib/CodeGen/TargetLoweringBase.cpp | |
| parent | af16cda10d4286d1bed8aacd559211d7ee0af4c2 (diff) | |
| download | llvm-720ab84ba2f7c4c748fb9295110ae35be0d7c9cb.zip llvm-720ab84ba2f7c4c748fb9295110ae35be0d7c9cb.tar.gz llvm-720ab84ba2f7c4c748fb9295110ae35be0d7c9cb.tar.bz2 | |
Add a comment above findRepresentativeClass explaining why it's
where it is so that future generations can understand.
llvm-svn: 231111
Diffstat (limited to 'llvm/lib/CodeGen/TargetLoweringBase.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/TargetLoweringBase.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp index 9048a44..07f9f66 100644 --- a/llvm/lib/CodeGen/TargetLoweringBase.cpp +++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp @@ -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 { |