[llvm] [LoopInterchange] Ignore the cost-model, force interchange if legal (PR #148858)

[Madhur Amilkanthwar via llvm-commits]

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@@ -66,6 +66,10 @@ static cl::opt<unsigned int> MaxMemInstrCount(
         "in the dependency matrix. Higher value may lead to more interchanges "
         "at the cost of compile-time"));
 
+static cl::opt<bool> ForceLoopInterchange(
+    "loop-interchange-force", cl::init(false), cl::Hidden,
+    cl::desc("Ignore the cost model, and force interchange if it is legal"));
+
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madhur13490 wrote:

Would it be better if we call it `-loop-interchange-ignore-cost-model`? `-force` seems it covers wider scenarios.

https://github.com/llvm/llvm-project/pull/148858