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|
; RUN: llc -mtriple=avr < %s | 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, ptr inttoptr (i64 4 to ptr)
ret void
}
; NOTE: All arguments are passed via the stack for varargs functions.
; NOTE: Both %a & %b occupy a 1-byte stack slot.
define i8 @foo0(i8 %a, i8 %b, ...) {
; CHECK-LABEL: foo0:
; CHECK: ; %bb.0:
; CHECK-NEXT: push r28
; CHECK-NEXT: push r29
; CHECK-NEXT: in r28, 61
; CHECK-NEXT: in r29, 62
; CHECK-NEXT: ldd r25, Y+6
; CHECK-NEXT: ldd r24, Y+5
; CHECK-NEXT: sub r24, r25
; CHECK-NEXT: pop r29
; CHECK-NEXT: pop r28
; CHECK-NEXT: ret
%c = sub i8 %a, %b
ret i8 %c
}
; NOTE: All arguments are passed via the stack since the argument %a is too large.
define i8 @foo1([19 x i8] %a, i8 %b) {
; CHECK-LABEL: foo1:
; CHECK: ; %bb.0:
; CHECK-NEXT: push r28
; CHECK-NEXT: push r29
; CHECK-NEXT: in r28, 61
; CHECK-NEXT: in r29, 62
; CHECK-NEXT: ldd r25, Y+24
; CHECK-NEXT: ldd r24, Y+5
; CHECK-NEXT: sub r24, r25
; CHECK-NEXT: pop r29
; CHECK-NEXT: pop r28
; CHECK-NEXT: ret
%c = extractvalue [19 x i8] %a, 0
%d = sub i8 %c, %b
ret i8 %d
}
; NOTE: The argument %b is passed via the stack, since the argument %a costs
; NOTE: total 18 registers though it is a 17-byte array.
define i8 @foo2([17 x i8] %a, i8 %b) {
; CHECK-LABEL: foo2:
; CHECK: ; %bb.0:
; CHECK-NEXT: push r28
; CHECK-NEXT: push r29
; CHECK-NEXT: in r28, 61
; CHECK-NEXT: in r29, 62
; CHECK-NEXT: mov r24, r8
; CHECK-NEXT: ldd r25, Y+5
; CHECK-NEXT: sub r24, r25
; CHECK-NEXT: pop r29
; CHECK-NEXT: pop r28
; CHECK-NEXT: ret
%c = extractvalue [17 x i8] %a, 0
%d = sub i8 %c, %b
ret i8 %d
}
; NOTE: Though %a costs 16 registers and 2 registers are vacant, the 4-byte
; NOTE: %b has to be dropped to the stack.
; NOTE: total 18 registers.
define i32 @foo3([4 x i32] %a, i32 %b) {
; CHECK-LABEL: foo3:
; CHECK: ; %bb.0:
; CHECK-NEXT: push r28
; CHECK-NEXT: push r29
; CHECK-NEXT: in r28, 61
; CHECK-NEXT: in r29, 62
; CHECK-NEXT: ldd r22, Y+5
; CHECK-NEXT: ldd r23, Y+6
; CHECK-NEXT: ldd r24, Y+7
; CHECK-NEXT: ldd r25, Y+8
; CHECK-NEXT: sub r22, r10
; CHECK-NEXT: sbc r23, r11
; CHECK-NEXT: sbc r24, r12
; CHECK-NEXT: sbc r25, r13
; CHECK-NEXT: pop r29
; CHECK-NEXT: pop r28
; CHECK-NEXT: ret
%c = extractvalue [4 x i32] %a, 0
%d = sub nsw i32 %b, %c
ret i32 %d
}
; NOTE: Both %1 and %2 are passed via stack, and each has a 1-byte slot.
define i8 @foo4([17 x i8] %0, i8 %1, i8 %2) {
; CHECK-LABEL: foo4:
; CHECK: ; %bb.0:
; CHECK-NEXT: push r8
; CHECK-NEXT: push r28
; CHECK-NEXT: push r29
; CHECK-NEXT: in r28, 61
; CHECK-NEXT: in r29, 62
; CHECK-NEXT: ldd r24, Y+6
; CHECK-NEXT: sub r8, r24
; CHECK-NEXT: ldd r24, Y+7
; CHECK-NEXT: add r24, r8
; CHECK-NEXT: pop r29
; CHECK-NEXT: pop r28
; CHECK-NEXT: pop r8
; CHECK-NEXT: ret
%4 = extractvalue [17 x i8] %0, 0
%5 = sub i8 %4, %1
%6 = add i8 %5, %2
ret i8 %6
}
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