Re: [PATCH 4/5] xtensa: Eliminate unwanted reg-reg moves during DFmode input reloads

2022-06-15 Thread Max Filippov via Gcc-patches
On Mon, Jun 13, 2022 at 8:54 PM Takayuki 'January June' Suwa wrote: > > When spilled DFmode registers are reloaded in, once loaded into a pair of > SImode regs and then copied from that regs. Such unwanted reg-reg moves > seems not to be eliminated at the "cprop_hardreg" stage, despite no problem

[PATCH 4/5] xtensa: Eliminate unwanted reg-reg moves during DFmode input reloads

2022-06-13 Thread Takayuki 'January June' Suwa via Gcc-patches
When spilled DFmode registers are reloaded in, once loaded into a pair of SImode regs and then copied from that regs. Such unwanted reg-reg moves seems not to be eliminated at the "cprop_hardreg" stage, despite no problem in output reloads. Luckily it is easy to resolve such inefficiencies, with