1 ; RUN: llc -mtriple=riscv32 -mattr=+c -filetype=obj \
2 ; RUN: -disable-block-placement < %s \
3 ; RUN: | llvm-objdump -d -triple=riscv32 -mattr=+c -M no-aliases - \
4 ; RUN: | FileCheck -check-prefix=RV32IC %s
6 ; This acts as a sanity check for the codegen instruction compression path,
7 ; verifying that the assembled file contains compressed instructions when
8 ; expected. Handling of the compressed ISA is implemented so the same
9 ; transformation patterns should be used whether compressing an input .s file or
10 ; compressing codegen output. This file contains sanity checks to ensure that is
11 ; working as expected. Particular care should be taken to test pseudo
14 ; Note: TODOs in this file are only appropriate if they highlight a case where
15 ; a generated instruction that can be compressed by an existing pattern isn't.
16 ; It may be useful to have tests that indicate where better compression would be
17 ; possible if alternative codegen choices were made, but they belong in a
18 ; different test file.
20 define i32 @simple_arith(i32 %a, i32 %b) nounwind {
21 ; RV32IC-LABEL: simple_arith:
22 ; RV32IC: addi a2, a0, 1
23 ; RV32IC-NEXT: c.andi a2, 11
24 ; RV32IC-NEXT: c.slli a2, 7
25 ; RV32IC-NEXT: c.srai a1, 9
26 ; RV32IC-NEXT: c.add a1, a2
27 ; RV32IC-NEXT: sub a0, a1, a0
28 ; RV32IC-NEXT: c.jr ra
38 define i32 @select(i32 %a, i32 *%b) nounwind {
39 ; RV32IC-LABEL: select:
40 ; RV32IC: c.lw a2, 0(a1)
41 ; RV32IC-NEXT: c.beqz a2, 4
42 ; RV32IC-NEXT: c.mv a0, a2
43 ; RV32IC-NEXT: c.lw a2, 0(a1)
44 ; RV32IC-NEXT: c.bnez a2, 4
45 ; RV32IC-NEXT: c.mv a0, a2
46 ; RV32IC-NEXT: c.lw a2, 0(a1)
47 ; RV32IC-NEXT: bltu a2, a0, 6
48 ; RV32IC-NEXT: c.mv a0, a2
49 ; RV32IC-NEXT: c.lw a2, 0(a1)
50 ; RV32IC-NEXT: bgeu a0, a2, 6
51 ; RV32IC-NEXT: c.mv a0, a2
52 ; RV32IC-NEXT: c.lw a2, 0(a1)
53 ; RV32IC-NEXT: bltu a0, a2, 6
54 ; RV32IC-NEXT: c.mv a0, a2
55 ; RV32IC-NEXT: c.lw a2, 0(a1)
56 ; RV32IC-NEXT: bgeu a2, a0, 6
57 ; RV32IC-NEXT: c.mv a0, a2
58 ; RV32IC-NEXT: c.lw a2, 0(a1)
59 ; RV32IC-NEXT: blt a2, a0, 6
60 ; RV32IC-NEXT: c.mv a0, a2
61 ; RV32IC-NEXT: c.lw a2, 0(a1)
62 ; RV32IC-NEXT: bge a0, a2, 6
63 ; RV32IC-NEXT: c.mv a0, a2
64 ; RV32IC-NEXT: c.lw a2, 0(a1)
65 ; RV32IC-NEXT: blt a0, a2, 6
66 ; RV32IC-NEXT: c.mv a0, a2
67 ; RV32IC-NEXT: c.lw a1, 0(a1)
68 ; RV32IC-NEXT: bge a1, a0, 6
69 ; RV32IC-NEXT: c.mv a0, a1
70 ; RV32IC-NEXT: c.jr ra
71 %val1 = load volatile i32, i32* %b
72 %tst1 = icmp eq i32 0, %val1
73 %val2 = select i1 %tst1, i32 %a, i32 %val1
75 %val3 = load volatile i32, i32* %b
76 %tst2 = icmp ne i32 0, %val3
77 %val4 = select i1 %tst2, i32 %val2, i32 %val3
79 %val5 = load volatile i32, i32* %b
80 %tst3 = icmp ugt i32 %val4, %val5
81 %val6 = select i1 %tst3, i32 %val4, i32 %val5
83 %val7 = load volatile i32, i32* %b
84 %tst4 = icmp uge i32 %val6, %val7
85 %val8 = select i1 %tst4, i32 %val6, i32 %val7
87 %val9 = load volatile i32, i32* %b
88 %tst5 = icmp ult i32 %val8, %val9
89 %val10 = select i1 %tst5, i32 %val8, i32 %val9
91 %val11 = load volatile i32, i32* %b
92 %tst6 = icmp ule i32 %val10, %val11
93 %val12 = select i1 %tst6, i32 %val10, i32 %val11
95 %val13 = load volatile i32, i32* %b
96 %tst7 = icmp sgt i32 %val12, %val13
97 %val14 = select i1 %tst7, i32 %val12, i32 %val13
99 %val15 = load volatile i32, i32* %b
100 %tst8 = icmp sge i32 %val14, %val15
101 %val16 = select i1 %tst8, i32 %val14, i32 %val15
103 %val17 = load volatile i32, i32* %b
104 %tst9 = icmp slt i32 %val16, %val17
105 %val18 = select i1 %tst9, i32 %val16, i32 %val17
107 %val19 = load volatile i32, i32* %b
108 %tst10 = icmp sle i32 %val18, %val19
109 %val20 = select i1 %tst10, i32 %val18, i32 %val19
114 define i32 @pos_tiny() nounwind {
115 ; RV32IC-LABEL: pos_tiny:
116 ; RV32IC: c.li a0, 18
117 ; RV32IC-NEXT: c.jr ra
121 define i32 @pos_i32() nounwind {
122 ; RV32IC-LABEL: pos_i32:
123 ; RV32IC: lui a0, 423811
124 ; RV32IC-NEXT: addi a0, a0, -1297
125 ; RV32IC-NEXT: c.jr ra
129 define i32 @pos_i32_half_compressible() nounwind {
130 ; RV32IC-LABEL: pos_i32_half_compressible:
131 ; RV32IC: lui a0, 423810
132 ; RV32IC-NEXT: c.addi a0, 28
133 ; RV32IC-NEXT: c.jr ra
138 define i32 @neg_tiny() nounwind {
139 ; RV32IC-LABEL: neg_tiny:
140 ; RV32IC: c.li a0, -19
141 ; RV32IC-NEXT: c.jr ra
145 define i32 @neg_i32() nounwind {
146 ; RV32IC-LABEL: neg_i32:
147 ; RV32IC: lui a0, 912092
148 ; RV32IC-NEXT: addi a0, a0, -273
149 ; RV32IC-NEXT: c.jr ra
153 define i32 @pos_i32_hi20_only() nounwind {
154 ; RV32IC-LABEL: pos_i32_hi20_only:
155 ; RV32IC: c.lui a0, 16
156 ; RV32IC-NEXT: c.jr ra
160 define i32 @neg_i32_hi20_only() nounwind {
161 ; RV32IC-LABEL: neg_i32_hi20_only:
162 ; RV32IC: c.lui a0, 1048560
163 ; RV32IC-NEXT: c.jr ra