[PATCH] D155958: [NFC][ValueTracking]: Remove redundant computeKnownBits call for LoadInst in isKnownNonZero

[Dhruv Chawla via Phabricator via llvm-commits]

0xdc03 updated this revision to Diff 543198.
0xdc03 added a comment.

- Rebase on main


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D155958/new/

https://reviews.llvm.org/D155958

Files:
  llvm/lib/Analysis/ValueTracking.cpp


Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -2679,6 +2679,14 @@
     return isKnownNonZero(I->getOperand(0), Depth, Q) &&
            isGuaranteedNotToBePoison(I->getOperand(0), Q.AC, Q.CxtI, Q.DT,
                                      Depth);
+  case Instruction::Load:
+    // A Load tagged with nonnull metadata is never null.
+    if (Q.IIQ.getMetadata(cast<LoadInst>(I), LLVMContext::MD_nonnull))
+      return true;
+
+    // No need to fall through to computeKnownBits as range metadata is already
+    // handled in isKnownNonZero.
+    return false;
   case Instruction::Call:
     if (auto *II = dyn_cast<IntrinsicInst>(I)) {
       switch (II->getIntrinsicID()) {
@@ -2843,11 +2851,6 @@
         return true;
     }
 
-    // A Load tagged with nonnull metadata is never null.
-    if (const LoadInst *LI = dyn_cast<LoadInst>(V))
-      if (Q.IIQ.getMetadata(LI, LLVMContext::MD_nonnull))
-        return true;
-
     if (const auto *Call = dyn_cast<CallBase>(V)) {
       if (Call->isReturnNonNull())
         return true;


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