--- /dev/null
+; RUN: llc < %s -march=avr | FileCheck %s
+
+; CHECK-LABEL: ret_void_args_i8
+define void @ret_void_args_i8(i8 %a) {
+ ; CHECK: sts 4, r24
+ store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+ ret void
+}
+
+; CHECK-LABEL: ret_void_args_i8_i32
+define void @ret_void_args_i8_i32(i8 %a, i32 %b) {
+ ; CHECK: sts 4, r24
+ store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+
+ ; CHECK-NEXT: sts 8, r23
+ ; CHECK-NEXT: sts 7, r22
+ ; CHECK-NEXT: sts 6, r21
+ ; CHECK-NEXT: sts 5, r20
+ store volatile i32 %b, i32* inttoptr (i64 5 to i32*)
+ ret void
+}
+
+; CHECK-LABEL: ret_void_args_i8_i8_i8_i8
+define void @ret_void_args_i8_i8_i8_i8(i8 %a, i8 %b, i8 %c, i8 %d) {
+ ; CHECK: sts 4, r24
+ store volatile i8 %a, i8* inttoptr (i64 4 to i8*)
+ ; CHECK-NEXT: sts 5, r22
+ store volatile i8 %b, i8* inttoptr (i64 5 to i8*)
+ ; CHECK-NEXT: sts 6, r20
+ store volatile i8 %c, i8* inttoptr (i64 6 to i8*)
+ ; CHECK-NEXT: sts 7, r18
+ store volatile i8 %d, i8* inttoptr (i64 7 to i8*)
+ ret void
+}
+
+; CHECK-LABEL: ret_void_args_i32_16_i8
+define void @ret_void_args_i32_16_i8(i32 %a, i16 %b, i8 %c) {
+ ; CHECK: sts 7, r25
+ ; CHECK-NEXT: sts 6, r24
+ ; CHECK-NEXT: sts 5, r23
+ ; CHECK-NEXT: sts 4, r22
+ store volatile i32 %a, i32* inttoptr (i64 4 to i32*)
+
+ ; CHECK-NEXT: sts 5, r21
+ ; CHECK-NEXT: sts 4, r20
+ store volatile i16 %b, i16* inttoptr (i64 4 to i16*)
+
+ ; CHECK-NEXT: sts 4, r18
+ store volatile i8 %c, i8* inttoptr (i64 4 to i8*)
+ ret void
+}
+
+; CHECK-LABEL: ret_void_args_i64
+define void @ret_void_args_i64(i64 %a) {
+ ; CHECK: sts 11, r25
+ ; CHECK-NEXT: sts 10, r24
+ ; CHECK-NEXT: sts 9, r23
+ ; CHECK-NEXT: sts 8, r22
+ ; CHECK-NEXT: sts 7, r21
+ ; CHECK-NEXT: sts 6, r20
+ ; CHECK-NEXT: sts 5, r19
+ ; CHECK-NEXT: sts 4, r18
+ store volatile i64 %a, i64* inttoptr (i64 4 to i64*)
+ ret void
+}
+
+; CHECK-LABEL: ret_void_args_i64_i64
+define void @ret_void_args_i64_i64(i64 %a, i64 %b) {
+ ; CHECK: sts 11, r25
+ ; CHECK-NEXT: sts 10, r24
+ ; CHECK-NEXT: sts 9, r23
+ ; CHECK-NEXT: sts 8, r22
+ ; CHECK-NEXT: sts 7, r21
+ ; CHECK-NEXT: sts 6, r20
+ ; CHECK-NEXT: sts 5, r19
+ ; CHECK-NEXT: sts 4, r18
+ store volatile i64 %a, i64* inttoptr (i64 4 to i64*)
+
+ ; CHECK-NEXT: sts 11, r17
+ ; CHECK-NEXT: sts 10, r16
+ ; CHECK-NEXT: sts 9, r15
+ ; CHECK-NEXT: sts 8, r14
+ ; CHECK-NEXT: sts 7, r13
+ ; CHECK-NEXT: sts 6, r12
+ ; CHECK-NEXT: sts 5, r11
+ ; CHECK-NEXT: sts 4, r10
+ store volatile i64 %b, i64* inttoptr (i64 4 to i64*)
+ ret void
+}
+
+; This is exactly enough to hit the limit of what can be passed
+; completely in registers.
+; CHECK-LABEL: ret_void_args_i64_i64_i16
+define void @ret_void_args_i64_i64_i16(i64 %a, i64 %b, i16 %c) {
+ ; CHECK: sts 5, r9
+ ; CHECK-NEXT: sts 4, r8
+ store volatile i16 %c, i16* inttoptr (i64 4 to i16*)
+ ret void
+}
--- /dev/null
+; RUN: llc < %s -march=avr | FileCheck %s
+
+; CHECK-LABEL: ret_void_args_i64_i64_i32
+define void @ret_void_args_i64_i64_i32(i64 %a, i64 %b, i32 %c) {
+ ; We're goign to clobber PTRREG Y
+ ; CHECK: push r28
+ ; CHECK-NEXT: push r29
+
+ ; Load the stack pointer into Y.
+ ; CHECK-NEXT: in r28, 61
+ ; CHECK-NEXT: in r29, 62
+
+ ; Load the top two bytes from the 32-bit int.
+ ; CHECK-NEXT: ldd r24, Y+7
+ ; CHECK-NEXT: ldd r25, Y+8
+ ; Store the top two bytes of the 32-bit int to memory.
+ ; CHECK-NEXT: sts 7, r25
+ ; CHECK-NEXT: sts 6, r24
+
+ ; Load the bottom two bytes from the 32-bit int.
+ ; CHECK-NEXT: ldd r24, Y+5
+ ; CHECK-NEXT: ldd r25, Y+6
+ ; Store the bottom two bytes of the 32-bit int to memory.
+ ; CHECK-NEXT: sts 5, r25
+ ; CHECK-NEXT: sts 4, r24
+
+ ; Restore PTRREG Y
+ ; CHECK-NEXT: pop r29
+ ; CHECK-NEXT: pop r28
+ store volatile i32 %c, i32* inttoptr (i64 4 to i32*)
+ ret void
+}