[llvm] Users/xiangzhangllvm/loop unroll folding branches (PR #74703)

[via llvm-commits]

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@@ -776,6 +776,11 @@ shouldPragmaUnroll(Loop *L, const PragmaInfo &PInfo,
   if (PInfo.PragmaFullUnroll && TripCount != 0)
     return TripCount;
 
+  // Small MaxTripCount is clearly calculated with "pragma unroll".
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xiangzh1 wrote:

ok, let me rm it, I just want to express the "MaxTripCount is clearly calculated" (e.g 17) not roughly estimated （e.g  "int32 I=0, I < UnkowInt32LoopCount, I++", we may roughly set the MaxTripCount is Int_Max (0x7ffffffff)）

https://github.com/llvm/llvm-project/pull/74703