[llvm] [CostModel] Mark ssa_copy as free (PR #75294)

[David Green via llvm-commits]

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@@ -1510,6 +1510,8 @@ class BasicTTIImplBase : public TargetTransformInfoImplCRTPBase<T> {
     Intrinsic::ID IID = ICA.getID();
     if (Function::isTargetIntrinsic(IID))
       return TargetTransformInfo::TCC_Basic;
+    if (IID == Intrinsic::ssa_copy)
+      return TargetTransformInfo::TCC_Free;
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davemgreen wrote:

Ah I see. That is better, thanks.

https://github.com/llvm/llvm-project/pull/75294