search for: lqr_dead

...analyzePhysReg question > >I think this is related to PR25033: >https://llvm.org/bugs/show_bug.cgi?id=25033#c9 Yes, I agree this is very closely related. The code referenced in that PR if (Analysis.Kills || Analysis.Clobbers) // Register killed, so isn't live. return LQR_Dead; is incorrect I think. A clobber isn't a full def, and so cannot be assumed to be a kill. Some bits from the live-in value may pass through into the live-out value. Looking into the code for anaylzePhysReg, I think the code looks like it intends for Defines to truly mean Reg or a super-regis...

...analyzePhysReg question > >I think this is related to PR25033: >https://llvm.org/bugs/show_bug.cgi?id=25033#c9 Yes, I agree this is very closely related. The code referenced in that PR if (Analysis.Kills || Analysis.Clobbers) // Register killed, so isn't live. return LQR_Dead; is incorrect I think. A clobber isn't a full def, and so cannot be assumed to be a kill. Some bits from the live-in value may pass through into the live-out value. Looking into the code for anaylzePhysReg, I think the code looks like it intends for Defines to truly mean Reg or a super-regis...

> On Dec 3, 2015, at 5:36 PM, Quentin Colombet via llvm-dev <llvm-dev at lists.llvm.org> wrote: > >> >> On Dec 3, 2015, at 5:11 PM, Smith, Kevin B <kevin.b.smith at intel.com <mailto:kevin.b.smith at intel.com>> wrote: >> >> >> >>> -----Original Message----- >>> From: Quentin Colombet [mailto:qcolombet at apple.com