[llvm] [PatternMatch] Introduce match functor (NFC) (PR #159386)

[Luke Lau via llvm-commits]

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@@ -5123,8 +5120,7 @@ static Value *simplifyGEPInst(Type *SrcTy, Value *Ptr,
   }
 
   // Check to see if this is constant foldable.
-  if (!isa<Constant>(Ptr) ||
-      !all_of(Indices, [](Value *V) { return isa<Constant>(V); }))
+  if (!isa<Constant>(Ptr) || !all_of(Indices, match_fn(m_Constant())))
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lukel97 wrote:

I think this can be IsaPred<Constant>?

https://github.com/llvm/llvm-project/pull/159386