[llvm] [VPlan] Always consider register pressure on RISC-V (PR #156951)

[Florian Hahn via llvm-commits]

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@@ -393,6 +393,10 @@ static cl::opt<bool> EnableEarlyExitVectorization(
     cl::desc(
         "Enable vectorization of early exit loops with uncountable exits."));
 
+static cl::opt<bool> ConsiderRegPressure(
+    "vectorizer-consider-reg-pressure", cl::init(true), cl::Hidden,
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fhahn wrote:

better default to false, otherwise it is surprising that the default isn't used

https://github.com/llvm/llvm-project/pull/156951