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...piler from using a register (lets say X9 in ARM 64) in function C() only. I think that by AArch64RegisterInfo::getReservedRegs function, a register can be reserved for the whole program. But, I need to reserve for only part of the code. Can I implement a custom #pragma to do it? Thanks and Best Nisal

...%vreg12<def> = MOVi32imm 5; GPR32:%vreg12 STRWui %WZR, <fi#0>, 0; mem:ST4[FixedStack0] STRWui %vreg12, <fi#1>, 0; mem:ST4[FixedStack1] GPR32:%vreg12 STRWui %vreg11, <fi#2>, 0; mem:ST4[FixedStack2] GPR32:%vreg11 ................................. Best Nisal

Hi, Thanks a lot. Is it possible to implement that functionality as a pragma? Ex. .. [code] ... #pragma A .. .. #pragma B .. .. Lets say I want to reserve registers X9 and X10 only within pragma A and B. Is it possible to achieve this in llvm? Thanks Nisal On Mon, Jun 12, 2017 at 9:54 PM, Tim Northover <t.p.northover at gmail.com> wrote: > Hi Nisal, > > (Adding llvm-dev back again; best to keep these things public in case > they help someone else in the future). > > On 12 June 2017 at 19:43, Nisal Menuka <nisalmenuka2...