================
@@ -154,8 +154,11 @@ class LiveRangeEdit : private
MachineRegisterInfo::Delegate {
ArrayRef<Register> regs() const { return ArrayRef(NewRegs).slice(FirstNew); }
- /// createFrom - Create a new virtual register based on OldReg.
- Register createFrom(Register OldReg);
+ /// createFrom - Create a new virtual register based on OldReg. If \p RC is
+ /// non-null, constrain the register class of the new vreg. Partial reloads
+ /// of tuple regclasses will feed-in a subregclass derived from the regclass
+ /// of OldReg.
+ Register createFrom(Register OldReg, const TargetRegisterClass *RC =
nullptr);
----------------
cdevadas wrote:
Yes I can try that. But at the moment, the call to `getConstrainedRegClass` at
its caller (InlineSpiller.cpp in the other patch
https://github.com/llvm/llvm-project/pull/175002) makes it difficult. For now,
I'm leaving it untouched, and I will get back to it later.
https://github.com/llvm/llvm-project/pull/174999
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