[llvm] [IPO] Avoid repeated hash lookups (NFC) (PR #132588)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-pgo

@llvm/pr-subscribers-llvm-transforms

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/132588.diff


1 Files Affected:

- (modified) llvm/lib/Transforms/IPO/SampleProfile.cpp (+2-1) 


``````````diff
diff --git a/llvm/lib/Transforms/IPO/SampleProfile.cpp b/llvm/lib/Transforms/IPO/SampleProfile.cpp
index 731ee7edb48c8..a998f1a1b99a2 100644
--- a/llvm/lib/Transforms/IPO/SampleProfile.cpp
+++ b/llvm/lib/Transforms/IPO/SampleProfile.cpp
@@ -629,7 +629,8 @@ inline void SampleProfileInference<Function>::findUnlikelyJumps(
     const Instruction *TI = BB->getTerminator();
     // Check if a block ends with InvokeInst and mark non-taken branch unlikely.
     // In that case block Succ should be a landing pad
-    if (Successors[BB].size() == 2 && Successors[BB].back() == Succ) {
+    const auto &Succs = Successors[BB];
+    if (Succs.size() == 2 && Succs.back() == Succ) {
       if (isa<InvokeInst>(TI)) {
         Jump.IsUnlikely = true;
       }

``````````

</details>


https://github.com/llvm/llvm-project/pull/132588