SWDEV-520417 - Cherry-pick fixes from Shore to amd-mainline (llvm#1470)

Co-authored-by: Shoreshen <[email protected]>

Author: kzhuravl

llvm/lib/Target/AMDGPU/SIInstructions.td

@@ -1821,7 +1821,14 @@ def : BitConvert <v8i64,  v16f32, VReg_512>;
 def : BitConvert <v8f64,  v16f32, VReg_512>;
 def : BitConvert <v16f32, v8i64,  VReg_512>;
 def : BitConvert <v16f32, v8f64,  VReg_512>;
-
+def : BitConvert <v8i64,  v32f16, VReg_512>;
+def : BitConvert <v8i64,  v32i16, VReg_512>;
+def : BitConvert <v8f64,  v32f16, VReg_512>;
+def : BitConvert <v8f64,  v32i16, VReg_512>;
+def : BitConvert <v32f16, v8i64,  VReg_512>;
+def : BitConvert <v32f16, v8f64,  VReg_512>;
+def : BitConvert <v32i16, v8i64,  VReg_512>;
+def : BitConvert <v32i16, v8f64,  VReg_512>;
 
 
 def : BitConvert <v32bf16, v32i16, VReg_512>;