[llvm] [MachineOutlineer][NFC] Remove unnecessary RepeatedSequenceLocs.clear() (PR #106171)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-aarch64

Author: Kyungwoo Lee (kyulee-com)

<details>
<summary>Changes</summary>

 - When `getOutliningCandidateInfo()` returns `std::nullopt` (meaning no `OutlinedFunction` is created), there is no need to clear the input argument, `RepeatedSequenceLocs`, as it's already beaing cleared in the main loop of `findCandidates()`.
 - Replaced `2` by `MinRepeats`, which I missed from https://github.com/llvm/llvm-project/pull/105398

---
Full diff: https://github.com/llvm/llvm-project/pull/106171.diff


1 Files Affected:

- (modified) llvm/lib/Target/AArch64/AArch64InstrInfo.cpp (+3-7) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
index 1423dc4996c2ed..397c271083c721 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -8990,7 +8990,7 @@ AArch64InstrInfo::getOutliningCandidateInfo(
         NumBytesNoStackCalls <= RepeatedSequenceLocs.size() * 12) {
       RepeatedSequenceLocs = CandidatesWithoutStackFixups;
       FrameID = MachineOutlinerNoLRSave;
-      if (RepeatedSequenceLocs.size() < 2)
+      if (RepeatedSequenceLocs.size() < MinRepeats)
         return std::nullopt;
     } else {
       SetCandidateCallInfo(MachineOutlinerDefault, 12);
@@ -9051,10 +9051,8 @@ AArch64InstrInfo::getOutliningCandidateInfo(
     }
 
     // If we dropped all of the candidates, bail out here.
-    if (RepeatedSequenceLocs.size() < MinRepeats) {
-      RepeatedSequenceLocs.clear();
+    if (RepeatedSequenceLocs.size() < MinRepeats)
       return std::nullopt;
-    }
   }
 
   // Does every candidate's MBB contain a call? If so, then we might have a call
@@ -9079,10 +9077,8 @@ AArch64InstrInfo::getOutliningCandidateInfo(
 
     if (ModStackToSaveLR) {
       // We can't fix up the stack. Bail out.
-      if (!AllStackInstrsSafe) {
-        RepeatedSequenceLocs.clear();
+      if (!AllStackInstrsSafe)
         return std::nullopt;
-      }
 
       // Save + restore LR.
       NumBytesToCreateFrame += 8;

``````````

</details>


https://github.com/llvm/llvm-project/pull/106171