[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/Lint.cpp b/llvm/lib/Analysis/Lint.cpp
index 7e540ea9..1168005 100644
--- a/llvm/lib/Analysis/Lint.cpp
+++ b/llvm/lib/Analysis/Lint.cpp
@@ -551,8 +551,7 @@ static bool isZero(Value *V, const DataLayout &DL, DominatorTree *DT,
 
   VectorType *VecTy = dyn_cast<VectorType>(V->getType());
   if (!VecTy) {
-    KnownBits Known =
-        computeKnownBits(V, DL, 0, AC, dyn_cast<Instruction>(V), DT);
+    KnownBits Known = computeKnownBits(V, DL, AC, dyn_cast<Instruction>(V), DT);
     return Known.isZero();
   }