[VPlan] Use existing vector trip count VPValue for resume phi (NFC)

fhahn · fhahn · commit a480d5172215 · 2024-12-12T11:03:47.000Z
Instead of going through getOrAddLiveIn to get a VPValue for the vector trip count retrieve it directly from VPlan via getVectorTripCount. Small simplification following 0e70289.
diff --git a/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp b/llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -2747,7 +2747,7 @@ void InnerLoopVectorizer::createInductionResumeVPValues(
   // no suitable resume phi was already created.
   ScalarPHBuilder.createNaryOp(
       VPInstruction::ResumePhi,
-      {Plan.getOrAddLiveIn(VectorTripCount),
+      {&Plan.getVectorTripCount(),
        Plan.getOrAddLiveIn(ConstantInt::get(VectorTripCount->getType(), 0))},
       {}, "vec.epilog.resume.val");
 }

Original file line number	Diff line number	Diff line change
`@@ -2747,7 +2747,7 @@ void InnerLoopVectorizer::createInductionResumeVPValues(`
`2747`	`2747`	`// no suitable resume phi was already created.`
`2748`	`2748`	`ScalarPHBuilder.createNaryOp(`
`2749`	`2749`	`VPInstruction::ResumePhi,`
`2750`		`- {Plan.getOrAddLiveIn(VectorTripCount),`
	`2750`	`+ {&Plan.getVectorTripCount(),`
`2751`	`2751`	`Plan.getOrAddLiveIn(ConstantInt::get(VectorTripCount->getType(), 0))},`
`2752`	`2752`	`{}, "vec.epilog.resume.val");`
`2753`	`2753`	`}`