search for: pseudocopi

> On Feb 21, 2019, at 12:18 AM, Quentin Colombet via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > Hi Matt, > >> On Feb 20, 2019, at 4:49 PM, Arsenault, Matthew via llvm-dev <llvm-dev at lists.llvm.org <mailto:llvm-dev at lists.llvm.org>> wrote: >> >> Hi, >> >> Some operations on AMDGPU require operands which must be in a register

Hi, Some operations on AMDGPU require operands which must be in a register bank that is impossible to copy from another. The operation needs to be rewritten in a complex way to avoid the illegal copy. Currently if I correctly report the required register banks in the operand mapping, RegBankSelect happily inserts the illegal copies, somehow concluding they are cheap (I would at least hope