[llvm] [RISCV] Model dest EEW and fix peepholes not checking EEW (PR #105945)

[Craig Topper via llvm-commits]

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@@ -201,21 +201,24 @@ let Predicates = [HasVendorXSfvcp], mayLoad = 0, mayStore = 0,
   defm FVW : CustomSiFiveVCIX<"fvw", VCIX_XVW, VR,    VR,    FPR32>, Sched<[]>;
 }
 
-let Predicates = [HasVendorXSfvqmaccdod], DecoderNamespace = "XSfvqmaccdod" in {
+let Predicates = [HasVendorXSfvqmaccdod], DecoderNamespace = "XSfvqmaccdod",
+    DestEEW = EEWSEWx4 in {
   def VQMACCU_2x8x2  : CustomSiFiveVMACC<0b101100, OPMVV, "sf.vqmaccu.2x8x2">;
   def VQMACC_2x8x2   : CustomSiFiveVMACC<0b101101, OPMVV, "sf.vqmacc.2x8x2">;
   def VQMACCUS_2x8x2 : CustomSiFiveVMACC<0b101110, OPMVV, "sf.vqmaccus.2x8x2">;
   def VQMACCSU_2x8x2 : CustomSiFiveVMACC<0b101111, OPMVV, "sf.vqmaccsu.2x8x2">;
 }
 
-let Predicates = [HasVendorXSfvqmaccqoq], DecoderNamespace = "XSfvqmaccqoq" in {
+let Predicates = [HasVendorXSfvqmaccqoq], DecoderNamespace = "XSfvqmaccqoq",
+    DestEEW = EEWSEWx4 in {
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topperc wrote:

Do we need to know that the output EMUL increases by a factor of 2, but the element size increases by a factor of 4?

https://github.com/llvm/llvm-project/pull/105945