search for: cmov_gr8

See X86InstrInfo.td let usesCustomInserter = 1, isTwoAddress = 0, Defs = [EFLAGS] in def CMOV_GR8 : I<0, Pseudo, This creates a CMOV_GR8 pseudo instruction at isel time which can be expanded during scheduling time. Evan On Dec 10, 2009, at 11:46 AM, Javier Martinez wrote: > Hello, > > My expansion for an operation uses if and loops. How do I introduce > branches in the targe...

Hello, My expansion for an operation uses if and loops. How do I introduce branches in the target lowering stage? Do I have to create basic blocks, add the instructions to them and and add them to the machine function's basic block list? Thanks, Javier

...gt; = AND8ri %vreg0, 127, %EFLAGS<imp-def,dead>; GR8:%vreg1,%vreg0 > %vreg2<def> = OR8ri %vreg0, -128, %EFLAGS<imp-def,dead>; GR8:%vreg2,%vreg0 > CMP8mi <fi#-1>, 1, %noreg, 0, %noreg, 0, %EFLAGS<imp-def>; mem:LD1[FixedStack-1](align=8) > %vreg3<def> = CMOV_GR8 %vreg2<kill>, %vreg1<kill>, 4, %EFLAGS<imp-def,dead>, %EFLAGS<imp-use>; GR8:%vreg3,%vreg2,%vreg1 > %vreg4<def> = MOVZX32rr8 %vreg3<kill>; GR32:%vreg4 GR8:%vreg3 > %EAX<def> = COPY %vreg4; GR32:%vreg4 > RET > > CMOV_GR8 instruction has EFL...

...%vreg1<def> = AND8ri %vreg0, 127, %EFLAGS<imp-def,dead>; GR8:%vreg1,%vreg0 %vreg2<def> = OR8ri %vreg0, -128, %EFLAGS<imp-def,dead>; GR8:%vreg2,%vreg0 CMP8mi <fi#-1>, 1, %noreg, 0, %noreg, 0, %EFLAGS<imp-def>; mem:LD1[FixedStack-1](align=8) %vreg3<def> = CMOV_GR8 %vreg2<kill>, %vreg1<kill>, 4, %EFLAGS<imp-def,dead>, %EFLAGS<imp-use>; GR8:%vreg3,%vreg2,%vreg1 %vreg4<def> = MOVZX32rr8 %vreg3<kill>; GR32:%vreg4 GR8:%vreg3 %EAX<def> = COPY %vreg4; GR32:%vreg4 RET CMOV_GR8 instruction has EFLAGS use which is not mark...

On Jun 3, 2011, at 2:59 AM, Galanov, Sergey wrote: > Hi, Bill and Jakob. > > I don't quite understand. I am talking about CMOV_GR* instructions which are conservatively marked as clobbering EFLAGS in X86InstrCompiler.td. Doesn't that mean there cannot be any use of EFLAGS in subsequent instructions before it is defined by some other instruction? > > I also don't

...sion that unfortunately uses branches for a target that doesn't support 64-bit integers. Thanks, Javier On Thu, 10 Dec 2009 22:52:12 -0800, Evan Cheng <evan.cheng at apple.com> wrote: > See X86InstrInfo.td > let usesCustomInserter = 1, isTwoAddress = 0, Defs = [EFLAGS] in > def CMOV_GR8 : I<0, Pseudo, > > This creates a CMOV_GR8 pseudo instruction at isel time which can be > expanded during scheduling time. > > Evan > > On Dec 10, 2009, at 11:46 AM, Javier Martinez wrote: > >> Hello, >> >> My expansion for an operation uses if and...