[llvm] [X86] Avoid repeated hash lookups (NFC) (PR #127748)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-x86

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/127748.diff


1 Files Affected:

- (modified) llvm/lib/Target/X86/X86PadShortFunction.cpp (+2-1) 


``````````diff
diff --git a/llvm/lib/Target/X86/X86PadShortFunction.cpp b/llvm/lib/Target/X86/X86PadShortFunction.cpp
index c43fd97a055fc..2859195c6c26e 100644
--- a/llvm/lib/Target/X86/X86PadShortFunction.cpp
+++ b/llvm/lib/Target/X86/X86PadShortFunction.cpp
@@ -163,7 +163,8 @@ void PadShortFunc::findReturns(MachineBasicBlock *MBB, unsigned int Cycles) {
     return;
 
   if (hasReturn) {
-    ReturnBBs[MBB] = std::max(ReturnBBs[MBB], Cycles);
+    unsigned int &NumCycles = ReturnBBs[MBB];
+    NumCycles = std::max(NumCycles, Cycles);
     return;
   }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/127748