1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -O1 -mtriple=riscv32 -verify-machineinstrs < %s \
3 ; RUN: | FileCheck %s -check-prefix=RV32I
5 @a = common global i32 0, align 4
6 @l = common global i32 0, align 4
7 @b = common global i32 0, align 4
8 @c = common global i32 0, align 4
9 @d = common global i32 0, align 4
10 @e = common global i32 0, align 4
11 @k = common global i32 0, align 4
12 @f = common global i32 0, align 4
13 @j = common global i32 0, align 4
14 @g = common global i32 0, align 4
15 @i = common global i32 0, align 4
16 @h = common global i32 0, align 4
18 ; This test case benefits from codegen recognising that some values are
19 ; trivially rematerialisable, meaning they are recreated rather than saved to
20 ; the stack and restored. It creates high register pressure to force this
23 define i32 @test() nounwind {
25 ; RV32I: # %bb.0: # %entry
26 ; RV32I-NEXT: addi sp, sp, -48
27 ; RV32I-NEXT: sw ra, 44(sp)
28 ; RV32I-NEXT: sw s1, 40(sp)
29 ; RV32I-NEXT: sw s2, 36(sp)
30 ; RV32I-NEXT: sw s3, 32(sp)
31 ; RV32I-NEXT: sw s4, 28(sp)
32 ; RV32I-NEXT: sw s5, 24(sp)
33 ; RV32I-NEXT: sw s6, 20(sp)
34 ; RV32I-NEXT: sw s7, 16(sp)
35 ; RV32I-NEXT: sw s8, 12(sp)
36 ; RV32I-NEXT: sw s9, 8(sp)
37 ; RV32I-NEXT: sw s10, 4(sp)
38 ; RV32I-NEXT: sw s11, 0(sp)
39 ; RV32I-NEXT: lui s3, %hi(a)
40 ; RV32I-NEXT: lw a0, %lo(a)(s3)
41 ; RV32I-NEXT: beqz a0, .LBB0_11
42 ; RV32I-NEXT: # %bb.1: # %for.body.preheader
43 ; RV32I-NEXT: lui s5, %hi(k)
44 ; RV32I-NEXT: lui s6, %hi(j)
45 ; RV32I-NEXT: lui s7, %hi(i)
46 ; RV32I-NEXT: lui s9, %hi(g)
47 ; RV32I-NEXT: lui s10, %hi(f)
48 ; RV32I-NEXT: lui s1, %hi(e)
49 ; RV32I-NEXT: lui s8, %hi(d)
50 ; RV32I-NEXT: addi s11, zero, 32
51 ; RV32I-NEXT: lui s2, %hi(c)
52 ; RV32I-NEXT: lui s4, %hi(b)
53 ; RV32I-NEXT: .LBB0_2: # %for.body
54 ; RV32I-NEXT: # =>This Inner Loop Header: Depth=1
55 ; RV32I-NEXT: lui a1, %hi(l)
56 ; RV32I-NEXT: lw a1, %lo(l)(a1)
57 ; RV32I-NEXT: beqz a1, .LBB0_4
58 ; RV32I-NEXT: # %bb.3: # %if.then
59 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
60 ; RV32I-NEXT: lw a4, %lo(e)(s1)
61 ; RV32I-NEXT: lw a3, %lo(d)(s8)
62 ; RV32I-NEXT: lw a2, %lo(c)(s2)
63 ; RV32I-NEXT: lw a1, %lo(b)(s4)
64 ; RV32I-NEXT: mv a5, s11
65 ; RV32I-NEXT: call foo
66 ; RV32I-NEXT: .LBB0_4: # %if.end
67 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
68 ; RV32I-NEXT: lw a0, %lo(k)(s5)
69 ; RV32I-NEXT: beqz a0, .LBB0_6
70 ; RV32I-NEXT: # %bb.5: # %if.then3
71 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
72 ; RV32I-NEXT: lw a4, %lo(f)(s10)
73 ; RV32I-NEXT: lw a3, %lo(e)(s1)
74 ; RV32I-NEXT: lw a2, %lo(d)(s8)
75 ; RV32I-NEXT: lw a1, %lo(c)(s2)
76 ; RV32I-NEXT: lw a0, %lo(b)(s4)
77 ; RV32I-NEXT: addi a5, zero, 64
78 ; RV32I-NEXT: call foo
79 ; RV32I-NEXT: .LBB0_6: # %if.end5
80 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
81 ; RV32I-NEXT: lw a0, %lo(j)(s6)
82 ; RV32I-NEXT: beqz a0, .LBB0_8
83 ; RV32I-NEXT: # %bb.7: # %if.then7
84 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
85 ; RV32I-NEXT: lw a4, %lo(g)(s9)
86 ; RV32I-NEXT: lw a3, %lo(f)(s10)
87 ; RV32I-NEXT: lw a2, %lo(e)(s1)
88 ; RV32I-NEXT: lw a1, %lo(d)(s8)
89 ; RV32I-NEXT: lw a0, %lo(c)(s2)
90 ; RV32I-NEXT: mv a5, s11
91 ; RV32I-NEXT: call foo
92 ; RV32I-NEXT: .LBB0_8: # %if.end9
93 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
94 ; RV32I-NEXT: lw a0, %lo(i)(s7)
95 ; RV32I-NEXT: beqz a0, .LBB0_10
96 ; RV32I-NEXT: # %bb.9: # %if.then11
97 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
98 ; RV32I-NEXT: lui a0, %hi(h)
99 ; RV32I-NEXT: lw a4, %lo(h)(a0)
100 ; RV32I-NEXT: lw a3, %lo(g)(s9)
101 ; RV32I-NEXT: lw a2, %lo(f)(s10)
102 ; RV32I-NEXT: lw a1, %lo(e)(s1)
103 ; RV32I-NEXT: lw a0, %lo(d)(s8)
104 ; RV32I-NEXT: mv a5, s11
105 ; RV32I-NEXT: call foo
106 ; RV32I-NEXT: .LBB0_10: # %for.inc
107 ; RV32I-NEXT: # in Loop: Header=BB0_2 Depth=1
108 ; RV32I-NEXT: lw a0, %lo(a)(s3)
109 ; RV32I-NEXT: addi a0, a0, -1
110 ; RV32I-NEXT: sw a0, %lo(a)(s3)
111 ; RV32I-NEXT: bnez a0, .LBB0_2
112 ; RV32I-NEXT: .LBB0_11: # %for.end
113 ; RV32I-NEXT: addi a0, zero, 1
114 ; RV32I-NEXT: lw s11, 0(sp)
115 ; RV32I-NEXT: lw s10, 4(sp)
116 ; RV32I-NEXT: lw s9, 8(sp)
117 ; RV32I-NEXT: lw s8, 12(sp)
118 ; RV32I-NEXT: lw s7, 16(sp)
119 ; RV32I-NEXT: lw s6, 20(sp)
120 ; RV32I-NEXT: lw s5, 24(sp)
121 ; RV32I-NEXT: lw s4, 28(sp)
122 ; RV32I-NEXT: lw s3, 32(sp)
123 ; RV32I-NEXT: lw s2, 36(sp)
124 ; RV32I-NEXT: lw s1, 40(sp)
125 ; RV32I-NEXT: lw ra, 44(sp)
126 ; RV32I-NEXT: addi sp, sp, 48
129 %.pr = load i32, i32* @a, align 4
130 %tobool14 = icmp eq i32 %.pr, 0
131 br i1 %tobool14, label %for.end, label %for.body
133 for.body: ; preds = %entry, %for.inc
134 %0 = phi i32 [ %dec, %for.inc ], [ %.pr, %entry ]
135 %1 = load i32, i32* @l, align 4
136 %tobool1 = icmp eq i32 %1, 0
137 br i1 %tobool1, label %if.end, label %if.then
139 if.then: ; preds = %for.body
140 %2 = load i32, i32* @b, align 4
141 %3 = load i32, i32* @c, align 4
142 %4 = load i32, i32* @d, align 4
143 %5 = load i32, i32* @e, align 4
144 %call = tail call i32 @foo(i32 %0, i32 %2, i32 %3, i32 %4, i32 %5, i32 32) #3
147 if.end: ; preds = %for.body, %if.then
148 %6 = load i32, i32* @k, align 4
149 %tobool2 = icmp eq i32 %6, 0
150 br i1 %tobool2, label %if.end5, label %if.then3
152 if.then3: ; preds = %if.end
153 %7 = load i32, i32* @b, align 4
154 %8 = load i32, i32* @c, align 4
155 %9 = load i32, i32* @d, align 4
156 %10 = load i32, i32* @e, align 4
157 %11 = load i32, i32* @f, align 4
158 %call4 = tail call i32 @foo(i32 %7, i32 %8, i32 %9, i32 %10, i32 %11, i32 64) #3
161 if.end5: ; preds = %if.end, %if.then3
162 %12 = load i32, i32* @j, align 4
163 %tobool6 = icmp eq i32 %12, 0
164 br i1 %tobool6, label %if.end9, label %if.then7
166 if.then7: ; preds = %if.end5
167 %13 = load i32, i32* @c, align 4
168 %14 = load i32, i32* @d, align 4
169 %15 = load i32, i32* @e, align 4
170 %16 = load i32, i32* @f, align 4
171 %17 = load i32, i32* @g, align 4
172 %call8 = tail call i32 @foo(i32 %13, i32 %14, i32 %15, i32 %16, i32 %17, i32 32) #3
175 if.end9: ; preds = %if.end5, %if.then7
176 %18 = load i32, i32* @i, align 4
177 %tobool10 = icmp eq i32 %18, 0
178 br i1 %tobool10, label %for.inc, label %if.then11
180 if.then11: ; preds = %if.end9
181 %19 = load i32, i32* @d, align 4
182 %20 = load i32, i32* @e, align 4
183 %21 = load i32, i32* @f, align 4
184 %22 = load i32, i32* @g, align 4
185 %23 = load i32, i32* @h, align 4
186 %call12 = tail call i32 @foo(i32 %19, i32 %20, i32 %21, i32 %22, i32 %23, i32 32) #3
189 for.inc: ; preds = %if.end9, %if.then11
190 %24 = load i32, i32* @a, align 4
191 %dec = add nsw i32 %24, -1
192 store i32 %dec, i32* @a, align 4
193 %tobool = icmp eq i32 %dec, 0
194 br i1 %tobool, label %for.end, label %for.body
196 for.end: ; preds = %for.inc, %entry
200 declare i32 @foo(i32, i32, i32, i32, i32, i32)