search for: ssub_2

...> = COPY %reg1044:sub_32bit<kill> %reg1045<def> = INSERT_SUBREG %reg1045, %reg1044<kill>, 4 %reg1045:sub_32bit<def> = COPY %reg1044<kill> %reg1050:ssub_0<def> = EXTRACT_SUBREG %reg1060:dsub_1<kill>, ssub_0 %reg1050:ssub_0<def> = COPY %reg1060:ssub_2<kill> It will also replace the TargetInstrInfo::copyRegToReg hook when copying virtual registers: %reg1050 = COPY %reg1044<kill> It will be lowered with a TII.copyRegToReg() call in LowerSubregsInstructionPass (which may need renaming). Why? 1. The new function CoalescerPair::is...

...<kill> > > %reg1045<def> = INSERT_SUBREG %reg1045, %reg1044<kill>, 4 > %reg1045:sub_32bit<def> = COPY %reg1044<kill> > > %reg1050:ssub_0<def> = EXTRACT_SUBREG %reg1060:dsub_1<kill>, ssub_0 > %reg1050:ssub_0<def> = COPY %reg1060:ssub_2<kill> > > It will also replace the TargetInstrInfo::copyRegToReg hook when copying virtual registers: > > %reg1050 = COPY %reg1044<kill> > > It will be lowered with a TII.copyRegToReg() call in LowerSubregsInstructionPass (which may need renaming). Ok. An immediat...

Does anyone know exactly what ComposerIndices in Target.td is all about? I see just one place where it's used in X86 but it's not clear from the comments in Target.td and it's one usage, exactly what this feature is about. Tia. Reed

...f a new value number. This in turn leads to artificial dependencies in the schedule graph for code like the following where all defs should be independent: %vreg0:ssub_0<def,read-undef> = produce an 'S' value %vreg0:ssub_1<def> = produce an 'S' value %vreg0:ssub_2<def> = produce an 'S' value %vreg0:ssub_3<def> = produce an 'S' value Subegister liveness tracking ============================ I developed a set of patches which enable liveness tracking on the subregister level, to overcome the problems mentio...

...gt; dependencies in the schedule graph for code like the following > where all defs > should be independent: > > %vreg0:ssub_0<def,read-undef> = produce an 'S' value > %vreg0:ssub_1<def> = produce an 'S' value > %vreg0:ssub_2<def> = produce an 'S' value > %vreg0:ssub_3<def> = produce an 'S' value > > > Subegister liveness tracking > ============================ > > I developed a set of patches which enable liveness tracking on the &gt...

...gt; dependencies in the schedule graph for code like the following where all >> defs >> should be independent: >> >> %vreg0:ssub_0<def,read-undef> = produce an 'S' value >> %vreg0:ssub_1<def> = produce an 'S' value >> %vreg0:ssub_2<def> = produce an 'S' value >> %vreg0:ssub_3<def> = produce an 'S' value >> >> >> Subegister liveness tracking >> ============================ >> >> I developed a set of patches which enable liveness trackin...

...al >> dependencies in the schedule graph for code like the following where all defs >> should be independent: >> >> %vreg0:ssub_0<def,read-undef> = produce an 'S' value >> %vreg0:ssub_1<def> = produce an 'S' value >> %vreg0:ssub_2<def> = produce an 'S' value >> %vreg0:ssub_3<def> = produce an 'S' value >> >> >> Subegister liveness tracking >> ============================ >> >> I developed a set of patches which enable liveness trac...