[ValueTracking] Make Depth last default arg (NFC) (#142384)

Having a finite Depth (or recursion limit) for computeKnownBits is very
limiting, but is currently a load-bearing necessity, as all KnownBits
are recomputed on each call and there is no caching. As a prerequisite
for an effort to remove the recursion limit altogether, either using a
clever caching technique, or writing a easily-invalidable KnownBits
analysis, make the Depth argument in APIs in ValueTracking uniformly the
last argument with a default value. This would aid in removing the
argument when the time comes, as many callers that currently pass 0
explicitly are now updated to omit the argument altogether.

1 files changed, 1 insertions, 2 deletions

diff --git a/llvm/lib/Analysis/BasicAliasAnalysis.cpp b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
index bcc9a71..b110c20 100644
--- a/llvm/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/llvm/lib/Analysis/BasicAliasAnalysis.cpp
@@ -1261,8 +1261,7 @@ AliasResult BasicAAResult::aliasGEP(
 
     ConstantRange CR = computeConstantRange(Index.Val.V, /* ForSigned */ false,
                                             true, &AC, Index.CxtI);
-    KnownBits Known =
-        computeKnownBits(Index.Val.V, DL, 0, &AC, Index.CxtI, DT);
+    KnownBits Known = computeKnownBits(Index.Val.V, DL, &AC, Index.CxtI, DT);
     CR = CR.intersectWith(
         ConstantRange::fromKnownBits(Known, /* Signed */ true),
         ConstantRange::Signed);