[ARM] Simplify code with std::map::operator[] (NFC) (#112159)

kazutakahirata · web-flow · commit 9c64b5e7591d · 2024-10-14T06:56:39.000-07:00
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -6868,15 +6868,13 @@ bool ARMPipelinerLoopInfo::tooMuchRegisterPressure(SwingSchedulerDAG &SSD,
       if (MI->isPHI() && S.getKind() == SDep::Anti) {
         Register Reg = S.getReg();
         if (Reg.isVirtual())
-          CrossIterationNeeds.insert(std::make_pair(Reg.id(), IterNeed()))
-              .first->second.set(0);
+          CrossIterationNeeds[Reg.id()].set(0);
       } else if (S.isAssignedRegDep()) {
         int OStg = SMS.stageScheduled(S.getSUnit());
         if (OStg >= 0 && OStg != Stg) {
           Register Reg = S.getReg();
           if (Reg.isVirtual())
-            CrossIterationNeeds.insert(std::make_pair(Reg.id(), IterNeed()))
-                .first->second |= ((1 << (OStg - Stg)) - 1);
+            CrossIterationNeeds[Reg.id()] |= ((1 << (OStg - Stg)) - 1);
         }
       }
   }

Original file line number	Diff line number	Diff line change
`@@ -6868,15 +6868,13 @@ bool ARMPipelinerLoopInfo::tooMuchRegisterPressure(SwingSchedulerDAG &SSD,`
`6868`	`6868`	`if (MI->isPHI() && S.getKind() == SDep::Anti) {`
`6869`	`6869`	`Register Reg = S.getReg();`
`6870`	`6870`	`if (Reg.isVirtual())`
`6871`		`- CrossIterationNeeds.insert(std::make_pair(Reg.id(), IterNeed()))`
`6872`		`- .first->second.set(0);`
	`6871`	`+ CrossIterationNeeds[Reg.id()].set(0);`
`6873`	`6872`	`} else if (S.isAssignedRegDep()) {`
`6874`	`6873`	`int OStg = SMS.stageScheduled(S.getSUnit());`
`6875`	`6874`	`if (OStg >= 0 && OStg != Stg) {`
`6876`	`6875`	`Register Reg = S.getReg();`
`6877`	`6876`	`if (Reg.isVirtual())`
`6878`		`- CrossIterationNeeds.insert(std::make_pair(Reg.id(), IterNeed()))`
`6879`		`- .first->second \|= ((1 << (OStg - Stg)) - 1);`
	`6877`	`+ CrossIterationNeeds[Reg.id()] \|= ((1 << (OStg - Stg)) - 1);`
`6880`	`6878`	`}`
`6881`	`6879`	`}`
`6882`	`6880`	`}`