Index: llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -1683,6 +1683,9 @@
     { ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i16, 4 },
     { ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i32, 2 },
 
+    // Complex: to v4f64
+    { ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i32,  4 },
+    { ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i32,  4 },
 
     // LowerVectorFP_TO_INT
     { ISD::FP_TO_SINT, MVT::v2i32, MVT::v2f32, 1 },
Index: llvm/test/Analysis/CostModel/AArch64/cast.ll
===================================================================
--- llvm/test/Analysis/CostModel/AArch64/cast.ll
+++ llvm/test/Analysis/CostModel/AArch64/cast.ll
@@ -396,8 +396,8 @@
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r203 = sitofp <4 x i8> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r204 = uitofp <4 x i16> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r205 = sitofp <4 x i16> undef to <4 x double>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 5 for instruction: %r206 = uitofp <4 x i32> undef to <4 x double>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 5 for instruction: %r207 = sitofp <4 x i32> undef to <4 x double>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %r206 = uitofp <4 x i32> undef to <4 x double>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %r207 = sitofp <4 x i32> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %r208 = uitofp <4 x i64> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %r209 = sitofp <4 x i64> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %r210 = uitofp <8 x i1> undef to <8 x float>