[mlir][spirv] Add support for fptoui conversion in ArithToSPIRV

[stevesuzuki-arm]

Summary

To enable the conversion of arith.fptoui to SPIRV OpConvertFToU

[kuhar]

LGTM

(Related issue: https://github.com/llvm/llvm-project/issues/59958)

mlir/lib/Conversion/ArithToSPIRV/ArithToSPIRV.cpp

patterns.add<
     spirv::ElementwiseOpPattern<arith::RemFOp, spirv::FRemOp>,
     TypeCastingOpPattern<arith::ExtUIOp, spirv::UConvertOp>, ExtUII1Pattern,
     TypeCastingOpPattern<arith::ExtSIOp, spirv::SConvertOp>, ExtSII1Pattern,
     TypeCastingOpPattern<arith::ExtFOp, spirv::FConvertOp>,
     TypeCastingOpPattern<arith::TruncIOp, spirv::SConvertOp>, TruncII1Pattern,
     TypeCastingOpPattern<arith::TruncFOp, spirv::FConvertOp>,
     TypeCastingOpPattern<arith::UIToFPOp, spirv::ConvertUToFOp>, UIToFPI1Pattern,
     TypeCastingOpPattern<arith::SIToFPOp, spirv::ConvertSToFOp>,
+    TypeCastingOpPattern<arith::FPToUIOp, spirv::ConvertFToUOp>,
     TypeCastingOpPattern<arith::FPToSIOp, spirv::ConvertFToSOp>,
     TypeCastingOpPattern<arith::IndexCastOp, spirv::SConvertOp>,
     TypeCastingOpPattern<arith::IndexCastUIOp, spirv::UConvertOp>,
     TypeCastingOpPattern<arith::BitcastOp, spirv::BitcastOp>,
     CmpIOpBooleanPattern, CmpIOpPattern,
     CmpFOpNanNonePattern, CmpFOpPattern,
     AddUIExtendedOpPattern,
     MulIExtendedOpPattern<arith::MulSIExtendedOp, spirv::SMulExtendedOp>,

mlir/test/Conversion/ArithToSPIRV/arith-to-spirv.mlir

func.func @trunc_to_veci1(%arg0: vector<4xi32>) -> vector<4xi1> {
   // CHECK: %[[IS_ONE:.*]] = spirv.IEqual %[[MASKED_SRC]], %[[MASK]] : vector<4xi32>
   // CHECK-DAG: %[[TRUE:.*]] = spirv.Constant dense<true> : vector<4xi1>
   // CHECK-DAG: %[[FALSE:.*]] = spirv.Constant dense<false> : vector<4xi1>
   // CHECK: spirv.Select %[[IS_ONE]], %[[TRUE]], %[[FALSE]] : vector<4xi1>, vector<4xi1>
   %0 = arith.trunci %arg0 : vector<4xi32> to vector<4xi1>
   return %0 : vector<4xi1>
 }
 
+// CHECK-LABEL: @fptoui1
+func.func @fptoui1(%arg0 : f32) -> i32 {
+  // CHECK: spirv.ConvertFToU %{{.*}} : f32 to i32
+  %0 = arith.fptoui %arg0 : f32 to i32
+  return %0 : i32
+}
+
+// CHECK-LABEL: @fptoui2
+func.func @fptoui2(%arg0 : f16) -> i16 {
+  // CHECK: spirv.ConvertFToU %{{.*}} : f16 to i16
+  %0 = arith.fptoui %arg0 : f16 to i16
+  return %0 : i16
+}
+
 // CHECK-LABEL: @fptosi1
 func.func @fptosi1(%arg0 : f32) -> i32 {
   // CHECK: spirv.ConvertFToS %{{.*}} : f32 to i32
   %0 = arith.fptosi %arg0 : f32 to i32
   return %0 : i32
 }
 
 // CHECK-LABEL: @fptosi2