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sub_hi
2017 Mar 22
3
REG_SEQUENCE use question
...employ using virtual regs with subs.
For example, it I want to move one 64-bit virtual reg to another, I'm
trying to use the following pattern:
def LoReg: OutPatFrag<(ops node:$Rd), (EXTRACT_SUBREG (i64 $Rd), isub_lo)>;
def HiReg: OutPatFrag<(ops node:$Rd), (EXTRACT_SUBREG (i64 $Rd), isub_hi)>;
def MOVi64rr : Pat<(set GPR64:$Rd, GPR64:$Rn),
(REG_SEQUENCE GPR64,
(MOVi32rr (HiReg GPR64:$Rn)),
isub_hi,
(MOVi32rr (LoReg GPR64:$Rn)),
isub_lo)>;
isub_hi and isub_lo are subregs of a single 64-bit virtual reg.
When trying to compile it, im getting the following e...