No more removing dead flags

AZero13 · web-flow · commit 27e8d5b1ee13 · 2025-07-16T10:50:44.000-04:00
diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -534,8 +534,6 @@ void LiveVariables::runOnInstr(MachineInstr &MI,
         UseRegs.push_back(MOReg);
     } else {
       assert(MO.isDef());
-      if (!(MOReg.isPhysical() && MRI->isReserved(MOReg)))
-        MO.setIsDead(false);
       DefRegs.push_back(MOReg);
     }
   }

Original file line number	Diff line number	Diff line change
`@@ -534,8 +534,6 @@ void LiveVariables::runOnInstr(MachineInstr &MI,`
`534`	`534`	`UseRegs.push_back(MOReg);`
`535`	`535`	`} else {`
`536`	`536`	`assert(MO.isDef());`
`537`		`- if (!(MOReg.isPhysical() && MRI->isReserved(MOReg)))`
`538`		`- MO.setIsDead(false);`
`539`	`537`	`DefRegs.push_back(MOReg);`
`540`	`538`	`}`
`541`	`539`	`}`