diff --git a/kotlin-native/backend.native/tests/build.gradle b/kotlin-native/backend.native/tests/build.gradle
index 9fb9f4cbb9d..2a5bab2e39b 100644
--- a/kotlin-native/backend.native/tests/build.gradle
+++ b/kotlin-native/backend.native/tests/build.gradle
@@ -5900,6 +5900,11 @@ fileCheckTest("filecheck_bce") {
 
 fileCheckTest("filecheck_signext_zeroext0") {
     annotatedSource = project.file('filecheck/signext_zeroext0.kt')
+    if (project.testTarget == 'mingw_x64') {
+        checkPrefix = "CHECK-WINDOWSX64"
+    } else if (!target.family.appleFamily && target.architecture == Architecture.ARM64) {
+        checkPrefix = "CHECK-AAPCS"
+    }
 }
 
 createInterop("filecheck_signext_zeroext_interop_input") {
@@ -5909,6 +5914,11 @@ createInterop("filecheck_signext_zeroext_interop_input") {
 fileCheckTest("filecheck_signext_zeroext_interop") {
     annotatedSource = project.file('filecheck/signext_zeroext_interop.kt')
     interop = "filecheck_signext_zeroext_interop_input"
+    if (project.testTarget == 'mingw_x64') {
+        checkPrefix = "CHECK-WINDOWSX64"
+    } else if (!target.family.appleFamily && target.architecture == Architecture.ARM64) {
+        checkPrefix = "CHECK-AAPCS"
+    }
 }
 
 fileCheckTest("filecheck_signext_zeroext_objc_export") {
diff --git a/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt b/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt
index 9f66bc761cf..30debb62980 100644
--- a/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt
+++ b/kotlin-native/backend.native/tests/filecheck/signext_zeroext0.kt
@@ -4,95 +4,145 @@
  */
 
 // CHECK-LABEL: zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
+// CHECK-LABEL-AAPCS: i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 %0)
+// CHECK-LABEL-WINDOWSX64: zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext %0)
 fun id(arg: Boolean): Boolean {
     return arg
 }
 
 // CHECK-LABEL: signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext %0)
+// CHECK-LABEL-AAPCS: i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
+// CHECK-LABEL-WINDOWSX64: i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 %0)
 fun id(arg: Byte): Byte {
     return arg
 }
 
 // CHECK-LABEL: zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext %0)
+// CHECK-LABEL-AAPCS: i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
+// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 %0)
 fun id(arg: Char): Char {
     return arg
 }
 
 // CHECK-LABEL: signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext %0)
+// CHECK-LABEL-AAPCS: i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
+// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 %0)
 fun id(arg: Short): Short {
     return arg
 }
 
 // CHECK-LABEL: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
+// CHECK-LABEL-AAPCS: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
+// CHECK-LABEL-WINDOWSX64: i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 %0)
 fun id(arg: Int): Int {
     return arg
 }
 
 // CHECK-LABEL: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
+// CHECK-LABEL-AAPCS: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
+// CHECK-LABEL-WINDOWSX64: i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 %0)
 fun id(arg: Long): Long {
     return arg
 }
 
 // CHECK-LABEL: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
+// CHECK-LABEL-AAPCS: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
+// CHECK-LABEL-WINDOWSX64: float @"kfun:#id(kotlin.Float){}kotlin.Float"(float %0)
 fun id(arg: Float): Float {
     return arg
 }
 
 // CHECK-LABEL: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
+// CHECK-LABEL-AAPCS: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
+// CHECK-LABEL-WINDOWSX64: double @"kfun:#id(kotlin.Double){}kotlin.Double"(double %0)
 fun id(arg: Double): Double {
     return arg
 }
 
 // CHECK-LABEL: define zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext %0)
+// CHECK-LABEL-AAPCS: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
+// CHECK-LABEL-WINDOWSX64: define i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 %0)
 fun id(arg: UByte): UByte {
     return arg
 }
 
 // CHECK-LABEL: define zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext %0)
+// CHECK-LABEL-AAPCS: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
+// CHECK-LABEL-WINDOWSX64: define i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 %0)
 fun id(arg: UShort): UShort {
     return arg
 }
 
 // CHECK-LABEL: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
+// CHECK-LABEL-AAPCS: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
+// CHECK-LABEL-WINDOWSX64: define i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 %0)
 fun id(arg: UInt): UInt {
     return arg
 }
 
 // CHECK-LABEL: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
+// CHECK-LABEL-AAPCS: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
+// CHECK-LABEL-WINDOWSX64: define i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 %0)
 fun id(arg: ULong): ULong {
     return arg
 }
 
 fun checkPrimitives() {
     // CHECK: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
+    // CHECK-AAPCS: call i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 {{.*}})
+    // CHECK-WINDOWSX64: call zeroext i1 @"kfun:#id(kotlin.Boolean){}kotlin.Boolean"(i1 zeroext {{.*}})
     id(true)
     // CHECK: call signext i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 signext {{.*}})
+    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
+    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.Byte){}kotlin.Byte"(i8 {{.*}})
     id(0.toByte())
     // CHECK: call zeroext i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Char){}kotlin.Char"(i16 {{.*}})
     id('a')
     // CHECK: call signext i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 signext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.Short){}kotlin.Short"(i16 {{.*}})
     id(0.toShort())
     // CHECK: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
+    // CHECK-AAPCS: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
+    // CHECK-WINDOWSX64: call i32 @"kfun:#id(kotlin.Int){}kotlin.Int"(i32 {{.*}})
     id(0)
     // CHECK: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
+    // CHECK-AAPCS: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
+    // CHECK-WINDOWSX64: call i64 @"kfun:#id(kotlin.Long){}kotlin.Long"(i64 {{.*}})
     id(0L)
     // CHECK: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
+    // CHECK-AAPCS: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
+    // CHECK-WINDOWSX64: call float @"kfun:#id(kotlin.Float){}kotlin.Float"(float {{.*}})
     id(0.5f)
     // CHECK: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
+    // CHECK-AAPCS: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
+    // CHECK-WINDOWSX64: call double @"kfun:#id(kotlin.Double){}kotlin.Double"(double {{.*}})
     id(0.5)
     // CHECK: call zeroext i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 zeroext {{.*}})
+    // CHECK-AAPCS: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
+    // CHECK-WINDOWSX64: call i8 @"kfun:#id(kotlin.UByte){}kotlin.UByte"(i8 {{.*}})
     id(0.toUByte())
     // CHECK: call zeroext i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(kotlin.UShort){}kotlin.UShort"(i16 {{.*}})
     id(0.toUShort())
     // CHECK: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
+    // CHECK-AAPCS: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
+    // CHECK-WINDOWSX64: call i32 @"kfun:#id(kotlin.UInt){}kotlin.UInt"(i32 {{.*}})
     id(15u)
     // CHECK: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
+    // CHECK-AAPCS: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
+    // CHECK-WINDOWSX64: call i64 @"kfun:#id(kotlin.ULong){}kotlin.ULong"(i64 {{.*}})
     id(15uL)
 }
 
 value class CharWrapper(val ch: Char)
 
 // CHECK-LABEL: zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext %0)
+// CHECK-LABEL-AAPCS: i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
+// CHECK-LABEL-WINDOWSX64: i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 %0)
 fun id(arg: CharWrapper): CharWrapper {
     return arg
 }
@@ -101,15 +151,21 @@ fun id(arg: CharWrapper): CharWrapper {
 
 fun checkInlineClasses() {
     // CHECK: call zeroext i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
+    // CHECK-WINDOWSX64: call i16 @"kfun:#id(CharWrapper){}CharWrapper"(i16 {{.*}})
     id(CharWrapper('c'))
 }
 
 // CHECK-LABEL: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+// CHECK-LABEL-AAPCS: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+// CHECK-LABEL-WINDOWSX64: %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
 fun nullableId(arg: Byte?): Byte? {
     return arg
 }
 
 // CHECK-LABEL: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+// CHECK-LABEL-AAPCS: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
+// CHECK-LABEL-WINDOWSX64: %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* %0, %struct.ObjHeader** %1)
 fun nullableId(arg: CharWrapper?): CharWrapper? {
     return arg
 }
@@ -117,12 +173,18 @@ fun nullableId(arg: CharWrapper?): CharWrapper? {
 // Check that we don't pass primitive-specific attributes to their boxes
 fun checkBoxes() {
     // CHECK: invoke %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    // CHECK-AAPCS: invoke %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    // CHECK-WINDOWSX64: invoke %struct.ObjHeader* @"kfun:#nullableId(kotlin.Byte?){}kotlin.Byte?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
     nullableId(1.toByte())
     // CHECK: invoke %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    // CHECK-AAPCS: invoke %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
+    // CHECK-WINDOWSX64: invoke %struct.ObjHeader* @"kfun:#nullableId(CharWrapper?){}CharWrapper?"(%struct.ObjHeader* {{.*}}, %struct.ObjHeader** {{.*}})
     nullableId(CharWrapper('a'))
 }
 
 // CHECK-LABEL: void @"kfun:#main(){}"()
+// CHECK-LABEL-AAPCS: void @"kfun:#main(){}"()
+// CHECK-LABEL-WINDOWSX64: void @"kfun:#main(){}"()
 fun main() {
     checkPrimitives()
     checkInlineClasses()
diff --git a/kotlin-native/backend.native/tests/filecheck/signext_zeroext_interop.kt b/kotlin-native/backend.native/tests/filecheck/signext_zeroext_interop.kt
index 0c76ac0687f..16c6f0ce184 100644
--- a/kotlin-native/backend.native/tests/filecheck/signext_zeroext_interop.kt
+++ b/kotlin-native/backend.native/tests/filecheck/signext_zeroext_interop.kt
@@ -6,58 +6,131 @@ import signext_zeroext_interop_input.*
 import kotlinx.cinterop.*
 
 // CHECK: declare zeroext i1 @Kotlin_Char_isHighSurrogate(i16 zeroext)
+// CHECK-AAPCS: declare i1 @Kotlin_Char_isHighSurrogate(i16)
+// CHECK-WINDOWSX64: declare zeroext i1 @Kotlin_Char_isHighSurrogate(i16)
 
 // Check that we pass attributes to functions imported from runtime.
 // CHECK-LABEL: void @"kfun:#checkRuntimeFunctionImport(){}"()
+// CHECK-LABEL-AAPCS: void @"kfun:#checkRuntimeFunctionImport(){}"()
+// CHECK-LABEL-WINDOWSX64: void @"kfun:#checkRuntimeFunctionImport(){}"()
 fun checkRuntimeFunctionImport() {
     // CHECK: call zeroext i1 @Kotlin_Char_isHighSurrogate(i16 zeroext {{.*}})
+    // CHECK-AAPCS: call i1 @Kotlin_Char_isHighSurrogate(i16 {{.*}})
+    // CHECK-WINDOWSX64: call zeroext i1 @Kotlin_Char_isHighSurrogate(i16 {{.*}})
     'c'.isHighSurrogate()
     // CHECK: call zeroext i1 @Kotlin_Float_isNaN(float {{.*}}
+    // CHECK-AAPCS: call i1 @Kotlin_Float_isNaN(float {{.*}}
+    // CHECK-WINDOWSX64: call zeroext i1 @Kotlin_Float_isNaN(float {{.*}}
     0.0f.isNaN()
 }
 
 // CHECK-LABEL: void @"kfun:#checkDirectInterop(){}"()
+// CHECK-LABEL-AAPCS: void @"kfun:#checkDirectInterop(){}"()
+// CHECK-LABEL-WINDOWSX64: void @"kfun:#checkDirectInterop(){}"()
 fun checkDirectInterop() {
     // compiler generates quite lovely names for bridges
     // (e.g. `_66696c65636865636b5f7369676e6578745f7a65726f6578745f696e7465726f70_knbridge0`),
     // so we don't check exact function names here.
     // CHECK: invoke signext i8 [[CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 signext {{.*}})
+    // CHECK-AAPCS: invoke i8 [[CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 {{.*}})
+    // CHECK-WINDOWSX64: invoke i8 [[CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 {{.*}})
     char_id(0.toByte())
     // CHECK: invoke zeroext i8 [[UNSIGNED_CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 zeroext {{.*}})
+    // CHECK-AAPCS: invoke i8 [[UNSIGNED_CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 {{.*}})
+    // CHECK-WINDOWSX64: invoke i8 [[UNSIGNED_CHAR_ID_BRIDGE:@_.*_knbridge[0-9]+]](i8 {{.*}})
     unsigned_char_id(0.toUByte())
     // CHECK: invoke signext i16 [[SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 signext {{.*}})
+    // CHECK-AAPCS: invoke i16 [[SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 {{.*}})
+    // CHECK-WINDOWSX64: invoke i16 [[SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 {{.*}})
     short_id(0.toShort())
     // CHECK: invoke zeroext i16 [[UNSIGNED_SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 zeroext {{.*}})
+    // CHECK-AAPCS: invoke i16 [[UNSIGNED_SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 {{.*}})
+    // CHECK-WINDOWSX64: invoke i16 [[UNSIGNED_SHORT_ID_BRIDGE:@_.*_knbridge[0-9]+]](i16 {{.*}})
     unsigned_short_id(0.toUShort())
     // CHECK: invoke i32 [[CALLBACK_USER_BRIDGE:@_.*_knbridge[0-9]+]](i8* bitcast (i32 (i32, i16)* [[STATIC_C_FUNCTION_BRIDGE:@_.*_kncfun[0-9]+]] to i8*))
+    // CHECK-AAPCS: invoke i32 [[CALLBACK_USER_BRIDGE:@_.*_knbridge[0-9]+]](i8* bitcast (i32 (i32, i16)* [[STATIC_C_FUNCTION_BRIDGE:@_.*_kncfun[0-9]+]] to i8*))
+    // CHECK-WINDOWSX64: invoke i32 [[CALLBACK_USER_BRIDGE:@_.*_knbridge[0-9]+]](i8* bitcast (i32 (i32, i16)* [[STATIC_C_FUNCTION_BRIDGE:@_.*_kncfun[0-9]+]] to i8*))
     callbackUser(staticCFunction { int: Int, short: Short -> int + short })
 }
 
 // CHECK-LABEL: void @"kfun:#main(){}"()
+// CHECK-LABEL-AAPCS: void @"kfun:#main(){}"()
+// CHECK-LABEL-WINDOWSX64: void @"kfun:#main(){}"()
 fun main() {
     checkRuntimeFunctionImport()
     checkDirectInterop()
 }
 
-// CHECK: define signext i8 [[CHAR_ID_BRIDGE]](i8 signext %0)
+// CHECK: signext i8 [[CHAR_ID_BRIDGE]](i8 signext %0)
 // CHECK: [[CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*char_id}}
 // CHECK: call signext i8 [[CHAR_ID_PTR]](i8 signext %0)
 
-// CHECK: define zeroext i8 [[UNSIGNED_CHAR_ID_BRIDGE]](i8 zeroext %0)
+// CHECK-AAPCS: i8 [[CHAR_ID_BRIDGE]](i8 %0)
+// CHECK-AAPCS: [[CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*char_id}}
+// CHECK-AAPCS: call i8 [[CHAR_ID_PTR]](i8 %0)
+
+// CHECK-WINDOWSX64: i8 [[CHAR_ID_BRIDGE]](i8 %0)
+// CHECK-WINDOWSX64: [[CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*char_id}}
+// CHECK-WINDOWSX64: call i8 [[CHAR_ID_PTR]](i8 %0)
+
+
+// CHECK: zeroext i8 [[UNSIGNED_CHAR_ID_BRIDGE]](i8 zeroext %0)
 // CHECK: [[UNSIGNED_CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*unsigned_char_id}}
 // CHECK: call zeroext i8 [[UNSIGNED_CHAR_ID_PTR]](i8 zeroext %0)
 
-// CHECK: define signext i16 [[SHORT_ID_BRIDGE]](i16 signext %0)
+// CHECK-AAPCS: i8 [[UNSIGNED_CHAR_ID_BRIDGE]](i8 %0)
+// CHECK-AAPCS: [[UNSIGNED_CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*unsigned_char_id}}
+// CHECK-AAPCS: call i8 [[UNSIGNED_CHAR_ID_PTR]](i8 %0)
+
+// CHECK-WINDOWSX64: i8 [[UNSIGNED_CHAR_ID_BRIDGE]](i8 %0)
+// CHECK-WINDOWSX64: [[UNSIGNED_CHAR_ID_PTR:%[0-9]+]] = load i8 (i8)*, i8 (i8)** @{{.*unsigned_char_id}}
+// CHECK-WINDOWSX64: call i8 [[UNSIGNED_CHAR_ID_PTR]](i8 %0)
+
+
+// CHECK: signext i16 [[SHORT_ID_BRIDGE]](i16 signext %0)
 // CHECK: [[SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*short_id}}
 // CHECK: call signext i16 [[SHORT_ID_PTR]](i16 signext %0)
 
-// CHECK: define zeroext i16 [[UNSIGNED_SHORT_ID_BRIDGE]](i16 zeroext %0)
+// CHECK-AAPCS: i16 [[SHORT_ID_BRIDGE]](i16 %0)
+// CHECK-AAPCS: [[SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*short_id}}
+// CHECK-AAPCS: call i16 [[SHORT_ID_PTR]](i16 %0)
+
+// CHECK-WINDOWSX64: i16 [[SHORT_ID_BRIDGE]](i16 %0)
+// CHECK-WINDOWSX64: [[SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*short_id}}
+// CHECK-WINDOWSX64: call i16 [[SHORT_ID_PTR]](i16 %0)
+
+
+// CHECK: zeroext i16 [[UNSIGNED_SHORT_ID_BRIDGE]](i16 zeroext %0)
 // CHECK: [[UNSIGNED_SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*unsigned_short_id}}
 // CHECK: call zeroext i16 [[UNSIGNED_SHORT_ID_PTR]](i16 zeroext %0)
 
-// CHECK: define i32 [[STATIC_C_FUNCTION_BRIDGE]](i32 %0, i16 signext %1)
+// CHECK-AAPCS: i16 [[UNSIGNED_SHORT_ID_BRIDGE]](i16 %0)
+// CHECK-AAPCS: [[UNSIGNED_SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*unsigned_short_id}}
+// CHECK-AAPCS: call i16 [[UNSIGNED_SHORT_ID_PTR]](i16 %0)
+
+// CHECK-WINDOWSX64: i16 [[UNSIGNED_SHORT_ID_BRIDGE]](i16 %0)
+// CHECK-WINDOWSX64: [[UNSIGNED_SHORT_ID_PTR:%[0-9]+]] = load i16 (i16)*, i16 (i16)** @{{.*unsigned_short_id}}
+// CHECK-WINDOWSX64: call i16 [[UNSIGNED_SHORT_ID_PTR]](i16 %0)
+
+
+// CHECK: i32 [[STATIC_C_FUNCTION_BRIDGE]](i32 %0, i16 signext %1)
 // CHECK: call i32 {{@_.*_knbridge[0-9]+}}(i32 %0, i16 signext %1)
 
-// CHECK: define i32 [[CALLBACK_USER_BRIDGE]](i8* %0)
+// CHECK-AAPCS: i32 [[STATIC_C_FUNCTION_BRIDGE]](i32 %0, i16 %1)
+// CHECK-AAPCS: call i32 {{@_.*_knbridge[0-9]+}}(i32 %0, i16 %1)
+
+// CHECK-WINDOWSX64: i32 [[STATIC_C_FUNCTION_BRIDGE]](i32 %0, i16 %1)
+// CHECK-WINDOWSX64: call i32 {{@_.*_knbridge[0-9]+}}(i32 %0, i16 %1)
+
+
+// CHECK: i32 [[CALLBACK_USER_BRIDGE]](i8* %0)
 // CHECK: [[CALLBACK_USER_PTR:%[0-9]+]] = load i32 (i8*)*, i32 (i8*)** @{{.*callbackUser}}
 // CHECK: call i32 [[CALLBACK_USER_PTR]](i8* %0)
+
+// CHECK-AAPCS: i32 [[CALLBACK_USER_BRIDGE]](i8* %0)
+// CHECK-AAPCS: [[CALLBACK_USER_PTR:%[0-9]+]] = load i32 (i8*)*, i32 (i8*)** @{{.*callbackUser}}
+// CHECK-AAPCS: call i32 [[CALLBACK_USER_PTR]](i8* %0)
+
+// CHECK-WINDOWSX64: i32 [[CALLBACK_USER_BRIDGE]](i8* %0)
+// CHECK-WINDOWSX64: [[CALLBACK_USER_PTR:%[0-9]+]] = load i32 (i8*)*, i32 (i8*)** @{{.*callbackUser}}
+// CHECK-WINDOWSX64: call i32 [[CALLBACK_USER_PTR]](i8* %0)