From 56dcaeec46dd53e271d6f201d2028996bf19f9dd Mon Sep 17 00:00:00 2001
From: Santiago Aboy Solanes <solanes@google.com>
Date: Fri, 22 Mar 2024 10:45:15 +0000
Subject: Remove extra uses of ClearAllBits

ArenaBitVector creation guarantees it starts empty. Add a debug
check to make sure this assumption doesn't change.

Note that ArenaAllocator guarantees zero-initialized memory but
ScopedArenaAllocators do not. This is fine either way since the
BitVector constructor calls ClearAllBits.

Bug: 329037671
Test: art/test/testrunner/testrunner.py --host --64 --optimizing -b
Change-Id: Icbf5e5dd1869e80b5d5828ecca9f13de30c0242b
---
 compiler/optimizing/graph_checker.cc | 1 -
 1 file changed, 1 deletion(-)

(limited to 'compiler/optimizing/graph_checker.cc')

diff --git a/compiler/optimizing/graph_checker.cc b/compiler/optimizing/graph_checker.cc
index f2662700c7..1ff0d4dc84 100644
--- a/compiler/optimizing/graph_checker.cc
+++ b/compiler/optimizing/graph_checker.cc
@@ -1175,7 +1175,6 @@ void GraphChecker::VisitPhi(HPhi* phi) {
                                  GetGraph()->GetCurrentInstructionId(),
                                  /* expandable= */ false,
                                  kArenaAllocGraphChecker);
-          visited.ClearAllBits();
           if (!IsConstantEquivalent(phi, other_phi, &visited)) {
             AddError(StringPrintf("Two phis (%d and %d) found for VReg %d but they "
                                   "are not equivalents of constants.",
-- 
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