1# RUN: llc -o - %s -mtriple=amdgcn-- -mcpu=fiji -verify-machineinstrs -run-pass=greedy,virtregrewriter | FileCheck %s
2--- |
3  define void @func0() #0 { ret void }
4  define void @func1() #0 { ret void }
5
6  attributes #0 = { "amdgpu-num-sgpr"="12" }
7...
8---
9# Make sure we only get a single spill+reload even if liverange splitting
10# created a sequence of multiple copy instructions.
11# CHECK-LABEL: name: func0
12# CHECK: SI_SPILL_S128_SAVE
13# CHECK-NOT: SI_SPILL_S128_SAVE
14# CHECK: S_NOP 0
15# CHECK: SI_SPILL_S128_RESTORE
16# CHECK-NOT: SI_SPILL_S128_RESTORE
17name: func0
18body: |
19  bb.0:
20    S_NOP 0, implicit-def undef %0.sub0 : sreg_128
21    S_NOP 0, implicit-def %0.sub3 : sreg_128
22
23    ; Clobber registers
24    S_NOP 0, implicit-def dead %sgpr0, implicit-def dead %sgpr1, implicit-def dead %sgpr2, implicit-def dead %sgpr3, implicit-def dead %sgpr4, implicit-def dead %sgpr5, implicit-def dead %sgpr6, implicit-def dead %sgpr7, implicit-def dead %sgpr8, implicit-def dead %sgpr9, implicit-def dead %sgpr10, implicit-def dead %sgpr11
25
26    S_NOP 0, implicit %0.sub0
27    S_NOP 0, implicit %0.sub3
28    S_NOP 0, implicit %0.sub0
29    S_NOP 0, implicit %0.sub3
30...
31---
32# LiveRange splitting should split this into 2 intervals with the second getting
33# allocated to sgpr0_sgpr1 and the first to something else so we see two copies
34# in between for the two subregisters that are alive.
35# CHECK-LABEL: name: func1
36# CHECK: [[REG0:%sgpr[0-9]+]] = COPY %sgpr0
37# CHECK: [[REG1:%sgpr[0-9]+]] = COPY %sgpr2
38# CHECK: S_NOP 0
39# CHECK: S_NOP 0, implicit [[REG0]]
40# CHECK: S_NOP 0, implicit [[REG1]]
41# CHECK: %sgpr0 = COPY [[REG0]]
42# CHECK: %sgpr2 = COPY [[REG1]]
43# CHECK: S_NOP
44# CHECK: S_NOP 0, implicit %sgpr0
45# CHECK: S_NOP 0, implicit %sgpr2
46name: func1
47tracksRegLiveness: true
48body: |
49  bb.0:
50    liveins: %sgpr0, %sgpr1, %sgpr2
51    undef %0.sub0 : sreg_128 = COPY %sgpr0
52    %0.sub2 = COPY %sgpr2
53
54    S_NOP 0, implicit-def dead %sgpr0, implicit-def dead %sgpr1
55
56    S_NOP 0, implicit %0.sub0
57    S_NOP 0, implicit %0.sub2
58
59    ; Clobber everything but sgpr0-sgpr3
60    S_NOP 0, implicit-def dead %sgpr4, implicit-def dead %sgpr5, implicit-def dead %sgpr6, implicit-def dead %sgpr7, implicit-def dead %sgpr8, implicit-def dead %sgpr9, implicit-def dead %sgpr10, implicit-def dead %sgpr11, implicit-def dead %sgpr12, implicit-def dead %sgpr13, implicit-def dead %sgpr14, implicit-def dead %sgpr15, implicit-def dead %vcc_lo, implicit-def dead %vcc_hi
61
62    S_NOP 0, implicit %0.sub0
63    S_NOP 0, implicit %0.sub2
64...
65