[llvm] [RISCV][GISEL] Add support for lowerFormalArguments that contain scalable vector types (PR #70882)

[Craig Topper via llvm-commits]

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@@ -1281,10 +1281,19 @@ MachineIRBuilder::buildInstr(unsigned Opc, ArrayRef<DstOp> DstOps,
                                  SrcOps[0].getLLTTy(*getMRI());
                         }) &&
            "type mismatch in input list");
-    assert((TypeSize::ScalarTy)SrcOps.size() *
-                   SrcOps[0].getLLTTy(*getMRI()).getSizeInBits() ==
-               DstOps[0].getLLTTy(*getMRI()).getSizeInBits() &&
-           "input scalars do not exactly cover the output vector register");
+    if (DstOps[0].getLLTTy(*getMRI()).isScalable())
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topperc wrote:

This isn't needed anymore either

https://github.com/llvm/llvm-project/pull/70882