xref: /llvm-project/llvm/test/CodeGen/AVR/return.ll (revision d1d3005c9fe6a1ded17d4cad373cae85c743e7f3) 
1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2; RUN: llc -mattr=avr6,sram -mtriple=avr < %s | FileCheck %s --check-prefix=AVR
3; RUN: llc -mcpu=attiny10 -mtriple=avr < %s | FileCheck %s --check-prefix=TINY
4
5;TODO: test returning byval structs
6; TODO: test naked functions
7
8define void @return_void() {
9; AVR-LABEL: return_void:
10; AVR:       ; %bb.0:
11; AVR-NEXT:    ret
12;
13; TINY-LABEL: return_void:
14; TINY:       ; %bb.0:
15; TINY-NEXT:    ret
16    ret void
17}
18
19define i8 @return8_imm() {
20; AVR-LABEL: return8_imm:
21; AVR:       ; %bb.0:
22; AVR-NEXT:    ldi r24, 5
23; AVR-NEXT:    ret
24;
25; TINY-LABEL: return8_imm:
26; TINY:       ; %bb.0:
27; TINY-NEXT:    ldi r24, 5
28; TINY-NEXT:    ret
29    ret i8 5
30}
31
32define i8 @return8_arg(i8 %x) {
33; AVR-LABEL: return8_arg:
34; AVR:       ; %bb.0:
35; AVR-NEXT:    ret
36;
37; TINY-LABEL: return8_arg:
38; TINY:       ; %bb.0:
39; TINY-NEXT:    ret
40    ret i8 %x
41}
42
43define i8 @return8_arg2(i8 %x, i8 %y, i8 %z) {
44; AVR-LABEL: return8_arg2:
45; AVR:       ; %bb.0:
46; AVR-NEXT:    mov r24, r20
47; AVR-NEXT:    ret
48;
49; TINY-LABEL: return8_arg2:
50; TINY:       ; %bb.0:
51; TINY-NEXT:    mov r24, r20
52; TINY-NEXT:    ret
53    ret i8 %z
54}
55
56define i16 @return16_imm() {
57; AVR-LABEL: return16_imm:
58; AVR:       ; %bb.0:
59; AVR-NEXT:    ldi r24, 57
60; AVR-NEXT:    ldi r25, 48
61; AVR-NEXT:    ret
62;
63; TINY-LABEL: return16_imm:
64; TINY:       ; %bb.0:
65; TINY-NEXT:    ldi r24, 57
66; TINY-NEXT:    ldi r25, 48
67; TINY-NEXT:    ret
68    ret i16 12345
69}
70
71define i16 @return16_arg(i16 %x) {
72; AVR-LABEL: return16_arg:
73; AVR:       ; %bb.0:
74; AVR-NEXT:    ret
75;
76; TINY-LABEL: return16_arg:
77; TINY:       ; %bb.0:
78; TINY-NEXT:    ret
79    ret i16 %x
80}
81
82define i16 @return16_arg2(i16 %x, i16 %y, i16 %z) {
83; AVR-LABEL: return16_arg2:
84; AVR:       ; %bb.0:
85; AVR-NEXT:    movw r24, r20
86; AVR-NEXT:    ret
87;
88; TINY-LABEL: return16_arg2:
89; TINY:       ; %bb.0:
90; TINY-NEXT:    mov r24, r20
91; TINY-NEXT:    mov r25, r21
92; TINY-NEXT:    ret
93    ret i16 %z
94}
95
96define i32 @return32_imm() {
97; AVR-LABEL: return32_imm:
98; AVR:       ; %bb.0:
99; AVR-NEXT:    ldi r22, 21
100; AVR-NEXT:    ldi r23, 205
101; AVR-NEXT:    ldi r24, 91
102; AVR-NEXT:    ldi r25, 7
103; AVR-NEXT:    ret
104;
105; TINY-LABEL: return32_imm:
106; TINY:       ; %bb.0:
107; TINY-NEXT:    ldi r22, 21
108; TINY-NEXT:    ldi r23, 205
109; TINY-NEXT:    ldi r24, 91
110; TINY-NEXT:    ldi r25, 7
111; TINY-NEXT:    ret
112    ret i32 123456789
113}
114
115define i32 @return32_arg(i32 %x) {
116; AVR-LABEL: return32_arg:
117; AVR:       ; %bb.0:
118; AVR-NEXT:    ret
119;
120; TINY-LABEL: return32_arg:
121; TINY:       ; %bb.0:
122; TINY-NEXT:    ret
123    ret i32 %x
124}
125
126define i32 @return32_arg2(i32 %x, i32 %y, i32 %z) {
127; AVR-LABEL: return32_arg2:
128; AVR:       ; %bb.0:
129; AVR-NEXT:    movw r22, r14
130; AVR-NEXT:    movw r24, r16
131; AVR-NEXT:    ret
132;
133; TINY-LABEL: return32_arg2:
134; TINY:       ; %bb.0:
135; TINY-NEXT:    push r28
136; TINY-NEXT:    push r29
137; TINY-NEXT:    in r28, 61
138; TINY-NEXT:    in r29, 62
139; TINY-NEXT:    in r16, 63
140; TINY-NEXT:    subi r28, 247
141; TINY-NEXT:    sbci r29, 255
142; TINY-NEXT:    ld r22, Y+
143; TINY-NEXT:    ld r23, Y+
144; TINY-NEXT:    subi r28, 2
145; TINY-NEXT:    sbci r29, 0
146; TINY-NEXT:    subi r28, 9
147; TINY-NEXT:    sbci r29, 0
148; TINY-NEXT:    out 63, r16
149; TINY-NEXT:    in r16, 63
150; TINY-NEXT:    subi r28, 245
151; TINY-NEXT:    sbci r29, 255
152; TINY-NEXT:    ld r24, Y+
153; TINY-NEXT:    ld r25, Y+
154; TINY-NEXT:    subi r28, 2
155; TINY-NEXT:    sbci r29, 0
156; TINY-NEXT:    subi r28, 11
157; TINY-NEXT:    sbci r29, 0
158; TINY-NEXT:    out 63, r16
159; TINY-NEXT:    pop r29
160; TINY-NEXT:    pop r28
161; TINY-NEXT:    ret
162    ret i32 %z
163}
164
165define i64 @return64_imm() {
166; AVR-LABEL: return64_imm:
167; AVR:       ; %bb.0:
168; AVR-NEXT:    ldi r18, 204
169; AVR-NEXT:    ldi r19, 204
170; AVR-NEXT:    ldi r20, 104
171; AVR-NEXT:    ldi r21, 37
172; AVR-NEXT:    ldi r22, 25
173; AVR-NEXT:    ldi r23, 22
174; AVR-NEXT:    ldi r24, 236
175; AVR-NEXT:    ldi r25, 190
176; AVR-NEXT:    ret
177;
178; TINY-LABEL: return64_imm:
179; TINY:       ; %bb.0:
180; TINY-NEXT:    ldi r20, 236
181; TINY-NEXT:    ldi r21, 190
182; TINY-NEXT:    mov r30, r24
183; TINY-NEXT:    mov r31, r25
184; TINY-NEXT:    subi r30, 250
185; TINY-NEXT:    sbci r31, 255
186; TINY-NEXT:    st Z+, r20
187; TINY-NEXT:    st Z+, r21
188; TINY-NEXT:    subi r30, 8
189; TINY-NEXT:    sbci r31, 0
190; TINY-NEXT:    ldi r24, 25
191; TINY-NEXT:    ldi r25, 22
192; TINY-NEXT:    subi r30, 252
193; TINY-NEXT:    sbci r31, 255
194; TINY-NEXT:    st Z+, r24
195; TINY-NEXT:    st Z+, r25
196; TINY-NEXT:    subi r30, 6
197; TINY-NEXT:    sbci r31, 0
198; TINY-NEXT:    ldi r24, 104
199; TINY-NEXT:    ldi r25, 37
200; TINY-NEXT:    subi r30, 254
201; TINY-NEXT:    sbci r31, 255
202; TINY-NEXT:    st Z+, r24
203; TINY-NEXT:    st Z+, r25
204; TINY-NEXT:    subi r30, 4
205; TINY-NEXT:    sbci r31, 0
206; TINY-NEXT:    ldi r24, 204
207; TINY-NEXT:    ldi r25, 204
208; TINY-NEXT:    st Z+, r24
209; TINY-NEXT:    st Z+, r25
210; TINY-NEXT:    ret
211    ret i64 13757395258967641292
212}
213
214define i64 @return64_arg(i64 %x) {
215; AVR-LABEL: return64_arg:
216; AVR:       ; %bb.0:
217; AVR-NEXT:    ret
218;
219; TINY-LABEL: return64_arg:
220; TINY:       ; %bb.0:
221; TINY-NEXT:    push r28
222; TINY-NEXT:    push r29
223; TINY-NEXT:    in r28, 61
224; TINY-NEXT:    in r29, 62
225; TINY-NEXT:    in r16, 63
226; TINY-NEXT:    subi r28, 245
227; TINY-NEXT:    sbci r29, 255
228; TINY-NEXT:    ld r20, Y+
229; TINY-NEXT:    ld r21, Y+
230; TINY-NEXT:    subi r28, 2
231; TINY-NEXT:    sbci r29, 0
232; TINY-NEXT:    subi r28, 11
233; TINY-NEXT:    sbci r29, 0
234; TINY-NEXT:    out 63, r16
235; TINY-NEXT:    mov r30, r24
236; TINY-NEXT:    mov r31, r25
237; TINY-NEXT:    subi r30, 250
238; TINY-NEXT:    sbci r31, 255
239; TINY-NEXT:    st Z+, r20
240; TINY-NEXT:    st Z+, r21
241; TINY-NEXT:    subi r30, 8
242; TINY-NEXT:    sbci r31, 0
243; TINY-NEXT:    in r16, 63
244; TINY-NEXT:    subi r28, 247
245; TINY-NEXT:    sbci r29, 255
246; TINY-NEXT:    ld r24, Y+
247; TINY-NEXT:    ld r25, Y+
248; TINY-NEXT:    subi r28, 2
249; TINY-NEXT:    sbci r29, 0
250; TINY-NEXT:    subi r28, 9
251; TINY-NEXT:    sbci r29, 0
252; TINY-NEXT:    out 63, r16
253; TINY-NEXT:    subi r30, 252
254; TINY-NEXT:    sbci r31, 255
255; TINY-NEXT:    st Z+, r24
256; TINY-NEXT:    st Z+, r25
257; TINY-NEXT:    subi r30, 6
258; TINY-NEXT:    sbci r31, 0
259; TINY-NEXT:    in r16, 63
260; TINY-NEXT:    subi r28, 249
261; TINY-NEXT:    sbci r29, 255
262; TINY-NEXT:    ld r24, Y+
263; TINY-NEXT:    ld r25, Y+
264; TINY-NEXT:    subi r28, 2
265; TINY-NEXT:    sbci r29, 0
266; TINY-NEXT:    subi r28, 7
267; TINY-NEXT:    sbci r29, 0
268; TINY-NEXT:    out 63, r16
269; TINY-NEXT:    subi r30, 254
270; TINY-NEXT:    sbci r31, 255
271; TINY-NEXT:    st Z+, r24
272; TINY-NEXT:    st Z+, r25
273; TINY-NEXT:    subi r30, 4
274; TINY-NEXT:    sbci r31, 0
275; TINY-NEXT:    in r16, 63
276; TINY-NEXT:    subi r28, 251
277; TINY-NEXT:    sbci r29, 255
278; TINY-NEXT:    ld r24, Y+
279; TINY-NEXT:    ld r25, Y+
280; TINY-NEXT:    subi r28, 2
281; TINY-NEXT:    sbci r29, 0
282; TINY-NEXT:    subi r28, 5
283; TINY-NEXT:    sbci r29, 0
284; TINY-NEXT:    out 63, r16
285; TINY-NEXT:    st Z+, r24
286; TINY-NEXT:    st Z+, r25
287; TINY-NEXT:    pop r29
288; TINY-NEXT:    pop r28
289; TINY-NEXT:    ret
290    ret i64 %x
291}
292
293define i64 @return64_arg2(i64 %x, i64 %y, i64 %z) {
294; AVR-LABEL: return64_arg2:
295; AVR:       ; %bb.0:
296; AVR-NEXT:    push r28
297; AVR-NEXT:    push r29
298; AVR-NEXT:    in r28, 61
299; AVR-NEXT:    in r29, 62
300; AVR-NEXT:    ldd r18, Y+5
301; AVR-NEXT:    ldd r19, Y+6
302; AVR-NEXT:    ldd r20, Y+7
303; AVR-NEXT:    ldd r21, Y+8
304; AVR-NEXT:    ldd r22, Y+9
305; AVR-NEXT:    ldd r23, Y+10
306; AVR-NEXT:    ldd r24, Y+11
307; AVR-NEXT:    ldd r25, Y+12
308; AVR-NEXT:    pop r29
309; AVR-NEXT:    pop r28
310; AVR-NEXT:    ret
311;
312; TINY-LABEL: return64_arg2:
313; TINY:       ; %bb.0:
314; TINY-NEXT:    push r28
315; TINY-NEXT:    push r29
316; TINY-NEXT:    in r28, 61
317; TINY-NEXT:    in r29, 62
318; TINY-NEXT:    in r16, 63
319; TINY-NEXT:    subi r28, 229
320; TINY-NEXT:    sbci r29, 255
321; TINY-NEXT:    ld r20, Y+
322; TINY-NEXT:    ld r21, Y+
323; TINY-NEXT:    subi r28, 2
324; TINY-NEXT:    sbci r29, 0
325; TINY-NEXT:    subi r28, 27
326; TINY-NEXT:    sbci r29, 0
327; TINY-NEXT:    out 63, r16
328; TINY-NEXT:    mov r30, r24
329; TINY-NEXT:    mov r31, r25
330; TINY-NEXT:    subi r30, 250
331; TINY-NEXT:    sbci r31, 255
332; TINY-NEXT:    st Z+, r20
333; TINY-NEXT:    st Z+, r21
334; TINY-NEXT:    subi r30, 8
335; TINY-NEXT:    sbci r31, 0
336; TINY-NEXT:    in r16, 63
337; TINY-NEXT:    subi r28, 231
338; TINY-NEXT:    sbci r29, 255
339; TINY-NEXT:    ld r24, Y+
340; TINY-NEXT:    ld r25, Y+
341; TINY-NEXT:    subi r28, 2
342; TINY-NEXT:    sbci r29, 0
343; TINY-NEXT:    subi r28, 25
344; TINY-NEXT:    sbci r29, 0
345; TINY-NEXT:    out 63, r16
346; TINY-NEXT:    subi r30, 252
347; TINY-NEXT:    sbci r31, 255
348; TINY-NEXT:    st Z+, r24
349; TINY-NEXT:    st Z+, r25
350; TINY-NEXT:    subi r30, 6
351; TINY-NEXT:    sbci r31, 0
352; TINY-NEXT:    in r16, 63
353; TINY-NEXT:    subi r28, 233
354; TINY-NEXT:    sbci r29, 255
355; TINY-NEXT:    ld r24, Y+
356; TINY-NEXT:    ld r25, Y+
357; TINY-NEXT:    subi r28, 2
358; TINY-NEXT:    sbci r29, 0
359; TINY-NEXT:    subi r28, 23
360; TINY-NEXT:    sbci r29, 0
361; TINY-NEXT:    out 63, r16
362; TINY-NEXT:    subi r30, 254
363; TINY-NEXT:    sbci r31, 255
364; TINY-NEXT:    st Z+, r24
365; TINY-NEXT:    st Z+, r25
366; TINY-NEXT:    subi r30, 4
367; TINY-NEXT:    sbci r31, 0
368; TINY-NEXT:    in r16, 63
369; TINY-NEXT:    subi r28, 235
370; TINY-NEXT:    sbci r29, 255
371; TINY-NEXT:    ld r24, Y+
372; TINY-NEXT:    ld r25, Y+
373; TINY-NEXT:    subi r28, 2
374; TINY-NEXT:    sbci r29, 0
375; TINY-NEXT:    subi r28, 21
376; TINY-NEXT:    sbci r29, 0
377; TINY-NEXT:    out 63, r16
378; TINY-NEXT:    st Z+, r24
379; TINY-NEXT:    st Z+, r25
380; TINY-NEXT:    pop r29
381; TINY-NEXT:    pop r28
382; TINY-NEXT:    ret
383    ret i64 %z
384}
385
386define i32 @return64_trunc(i32 %a, i32 %b, i32 %c, i64 %d) {
387; AVR-LABEL: return64_trunc:
388; AVR:       ; %bb.0:
389; AVR-NEXT:    push r28
390; AVR-NEXT:    push r29
391; AVR-NEXT:    in r28, 61
392; AVR-NEXT:    in r29, 62
393; AVR-NEXT:    ldd r22, Y+5
394; AVR-NEXT:    ldd r23, Y+6
395; AVR-NEXT:    ldd r24, Y+7
396; AVR-NEXT:    ldd r25, Y+8
397; AVR-NEXT:    pop r29
398; AVR-NEXT:    pop r28
399; AVR-NEXT:    ret
400;
401; TINY-LABEL: return64_trunc:
402; TINY:       ; %bb.0:
403; TINY-NEXT:    push r28
404; TINY-NEXT:    push r29
405; TINY-NEXT:    in r28, 61
406; TINY-NEXT:    in r29, 62
407; TINY-NEXT:    in r16, 63
408; TINY-NEXT:    subi r28, 243
409; TINY-NEXT:    sbci r29, 255
410; TINY-NEXT:    ld r22, Y+
411; TINY-NEXT:    ld r23, Y+
412; TINY-NEXT:    subi r28, 2
413; TINY-NEXT:    sbci r29, 0
414; TINY-NEXT:    subi r28, 13
415; TINY-NEXT:    sbci r29, 0
416; TINY-NEXT:    out 63, r16
417; TINY-NEXT:    in r16, 63
418; TINY-NEXT:    subi r28, 241
419; TINY-NEXT:    sbci r29, 255
420; TINY-NEXT:    ld r24, Y+
421; TINY-NEXT:    ld r25, Y+
422; TINY-NEXT:    subi r28, 2
423; TINY-NEXT:    sbci r29, 0
424; TINY-NEXT:    subi r28, 15
425; TINY-NEXT:    sbci r29, 0
426; TINY-NEXT:    out 63, r16
427; TINY-NEXT:    pop r29
428; TINY-NEXT:    pop r28
429; TINY-NEXT:    ret
430  %result = trunc i64 %d to i32
431  ret i32 %result
432}
433
434define avr_intrcc void @interrupt_handler() {
435; AVR-LABEL: interrupt_handler:
436; AVR:       ; %bb.0:
437; AVR-NEXT:    sei
438; AVR-NEXT:    push r0
439; AVR-NEXT:    in r0, 63
440; AVR-NEXT:    push r0
441; AVR-NEXT:    pop r0
442; AVR-NEXT:    out 63, r0
443; AVR-NEXT:    pop r0
444; AVR-NEXT:    reti
445;
446; TINY-LABEL: interrupt_handler:
447; TINY:       ; %bb.0:
448; TINY-NEXT:    sei
449; TINY-NEXT:    push r16
450; TINY-NEXT:    in r16, 63
451; TINY-NEXT:    push r16
452; TINY-NEXT:    pop r16
453; TINY-NEXT:    out 63, r16
454; TINY-NEXT:    pop r16
455; TINY-NEXT:    reti
456  ret void
457}
458
459define avr_signalcc void @signal_handler() {
460; AVR-LABEL: signal_handler:
461; AVR:       ; %bb.0:
462; AVR-NEXT:    push r0
463; AVR-NEXT:    in r0, 63
464; AVR-NEXT:    push r0
465; AVR-NEXT:    pop r0
466; AVR-NEXT:    out 63, r0
467; AVR-NEXT:    pop r0
468; AVR-NEXT:    reti
469;
470; TINY-LABEL: signal_handler:
471; TINY:       ; %bb.0:
472; TINY-NEXT:    push r16
473; TINY-NEXT:    in r16, 63
474; TINY-NEXT:    push r16
475; TINY-NEXT:    pop r16
476; TINY-NEXT:    out 63, r16
477; TINY-NEXT:    pop r16
478; TINY-NEXT:    reti
479  ret void
480}
481