[llvm] [ValueTracking] Combine variable declaration with its only assignment. NFC (PR #89526)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/89526

None

>From 3267db0e9093b217871b8a823682b1a868898a5a Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Sat, 20 Apr 2024 19:32:57 -0700
Subject: [PATCH] [ValueTracking] Combine variable declaration with its only
 assignment. NFC

---
 llvm/lib/Analysis/ValueTracking.cpp | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp
index c038f7eaabbb67..21e3f8a4cc52c7 100644
--- a/llvm/lib/Analysis/ValueTracking.cpp
+++ b/llvm/lib/Analysis/ValueTracking.cpp
@@ -2682,7 +2682,6 @@ static bool isKnownNonZeroFromOperator(const Operator *I,
     if (cast<PossiblyExactOperator>(I)->isExact())
       return isKnownNonZero(I->getOperand(0), DemandedElts, Q, Depth);
 
-    std::optional<bool> XUgeY;
     KnownBits XKnown =
         computeKnownBits(I->getOperand(0), DemandedElts, Depth, Q);
     // If X is fully unknown we won't be able to figure anything out so don't
@@ -2698,7 +2697,7 @@ static bool isKnownNonZeroFromOperator(const Operator *I,
       YKnown = YKnown.abs(/*IntMinIsPoison*/ false);
     }
     // If X u>= Y then div is non zero (0/0 is UB).
-    XUgeY = KnownBits::uge(XKnown, YKnown);
+    std::optional<bool> XUgeY = KnownBits::uge(XKnown, YKnown);
     // If X is total unknown or X u< Y we won't be able to prove non-zero
     // with compute known bits so just return early.
     return XUgeY && *XUgeY;