================
@@ -937,6 +940,26 @@ bool AArch64DAGToDAGISel::SelectRDVLImm(SDValue N, SDValue
&Imm) {
return false;
}
+// Given cntsd = (rdsvl, #1) >> 3, attempt to return a suitable multiplier
+// for RDSVL to calculate the streaming vector length in bytes * N. i.e.
+// rdsvl, #(ShlImm - 3)
----------------
MacDue wrote:
Realized I messed up that suggestion, `rdsvl, #(N - 3)` should be `rdsvl, #(1
<< (N - 3))`
https://github.com/llvm/llvm-project/pull/154761
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