[Vectorize] Avoid repeated hash lookups (NFC) (#107729)

kazutakahirata · web-flow · commit bc59b638ae35 · 2024-09-08T00:08:32.000-07:00
diff --git a/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp b/llvm/lib/Transforms/Vectorize/VPlanVerifier.cpp
@@ -177,9 +177,8 @@ bool VPlanVerifier::verifyVPBasicBlock(const VPBasicBlock *VPBB) {
 static bool hasDuplicates(const SmallVectorImpl<VPBlockBase *> &VPBlockVec) {
   SmallDenseSet<const VPBlockBase *, 8> VPBlockSet;
   for (const auto *Block : VPBlockVec) {
-    if (VPBlockSet.count(Block))
+    if (!VPBlockSet.insert(Block).second)
       return true;
-    VPBlockSet.insert(Block);
   }
   return false;
 }

Original file line number	Diff line number	Diff line change
`@@ -177,9 +177,8 @@ bool VPlanVerifier::verifyVPBasicBlock(const VPBasicBlock *VPBB) {`
`177`	`177`	`static bool hasDuplicates(const SmallVectorImpl<VPBlockBase *> &VPBlockVec) {`
`178`	`178`	`SmallDenseSet<const VPBlockBase *, 8> VPBlockSet;`
`179`	`179`	`for (const auto *Block : VPBlockVec) {`
`180`		`- if (VPBlockSet.count(Block))`
	`180`	`+ if (!VPBlockSet.insert(Block).second)`
`181`	`181`	`return true;`
`182`		`- VPBlockSet.insert(Block);`
`183`	`182`	`}`
`184`	`183`	`return false;`
`185`	`184`	`}`