1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -S %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-DEC
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-hardware-loop-phi=true -S %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-REGDEC
; RUN: opt -hardware-loops -force-hardware-loops=true -hardware-loop-decrement=1 -hardware-loop-counter-bitwidth=32 -force-nested-hardware-loop=true -S %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-DEC --check-prefix=CHECK-NESTED
; CHECK-LABEL: while_lt
define void @while_lt(i32 %i, i32 %N, i32* nocapture %A) {
entry:
%cmp4 = icmp ult i32 %i, %N
br i1 %cmp4, label %while.body, label %while.end
; CHECK: while.body.preheader:
; CHECK: [[COUNT:%[^ ]+]] = sub i32 %N, %i
; CHECK: call void @llvm.set.loop.iterations.i32(i32 [[COUNT]])
; CHECK: br label %while.body
; CHECK-REGDEC: [[REM:%[^ ]+]] = phi i32 [ [[COUNT]], %while.body.preheader ], [ [[LOOP_DEC:%[^ ]+]], %while.body ]
; CHECK-REGDEC: [[LOOP_DEC]] = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 [[REM]], i32 1)
; CHECK-REGDEC: [[CMP:%[^ ]+]] = icmp ne i32 [[LOOP_DEC]], 0
; CHECK-REGDEC: br i1 [[CMP]], label %while.body, label %while.end
; CHECK-DEC: [[LOOP_DEC:%[^ ]+]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC: br i1 [[LOOP_DEC]], label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
; CHECK-LABEL: while_gt
; CHECK: while.body.preheader:
; CHECK: [[COUNT:%[^ ]+]] = sub i32 %i, %N
; CHECK: call void @llvm.set.loop.iterations.i32(i32 [[COUNT]])
; CHECK: br label %while.body
; CHECK-REGDEC: [[REM:%[^ ]+]] = phi i32 [ [[COUNT]], %while.body.preheader ], [ [[LOOP_DEC:%[^ ]+]], %while.body ]
; CHECK-REGDEC: [[LOOP_DEC]] = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 [[REM]], i32 1)
; CHECK-REGDEC: [[CMP:%[^ ]+]] = icmp ne i32 [[LOOP_DEC]], 0
; CHECK-REGDEC: br i1 [[CMP]], label %while.body, label %while.end
; CHECK-DEC: [[LOOP_DEC:%[^ ]+]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC: br i1 [[LOOP_DEC]], label %while.body, label %while.end
define void @while_gt(i32 %i, i32 %N, i32* nocapture %A) {
entry:
%cmp4 = icmp sgt i32 %i, %N
br i1 %cmp4, label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %dec, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%dec = add nsw i32 %i.addr.05, -1
%cmp = icmp sgt i32 %dec, %N
br i1 %cmp, label %while.body, label %while.end
while.end:
ret void
}
; CHECK-LABEL: while_gte
; CHECK: while.body.preheader:
; CHECK: [[ADD:%[^ ]+]] = add i32 %i, 1
; CHECK: [[SEL:%[^ ]+]] = icmp slt i32 %N, %i
; CHECK: [[MIN:%[^ ]+]] = select i1 [[SEL]], i32 %N, i32 %i
; CHECK: [[COUNT:%[^ ]+]] = sub i32 [[ADD]], [[MIN]]
; CHECK: call void @llvm.set.loop.iterations.i32(i32 [[COUNT]])
; CHECK: br label %while.body
; CHECK-REGDEC: [[REM:%[^ ]+]] = phi i32 [ [[COUNT]], %while.body.preheader ], [ [[LOOP_DEC:%[^ ]+]], %while.body ]
; CHECK-REGDEC: [[LOOP_DEC]] = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 [[REM]], i32 1)
; CHECK-REGDEC: [[CMP:%[^ ]+]] = icmp ne i32 [[LOOP_DEC]], 0
; CHECK-REGDEC: br i1 [[CMP]], label %while.body, label %while.end
; CHECK-DEC: [[LOOP_DEC:%[^ ]+]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-DEC: br i1 [[LOOP_DEC]], label %while.body, label %while.end
define void @while_gte(i32 %i, i32 %N, i32* nocapture %A) {
entry:
%cmp4 = icmp slt i32 %i, %N
br i1 %cmp4, label %while.end, label %while.body
while.body:
%i.addr.05 = phi i32 [ %dec, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.addr.05
store i32 %i.addr.05, i32* %arrayidx, align 4
%dec = add nsw i32 %i.addr.05, -1
%cmp = icmp sgt i32 %i.addr.05, %N
br i1 %cmp, label %while.body, label %while.end
while.end:
ret void
}
; CHECK-LABEL: nested
; CHECK-NESTED: call void @llvm.set.loop.iterations.i32(i32 %N)
; CHECK-NESTED: br label %while.cond1.preheader.us
; CHECK: call void @llvm.set.loop.iterations.i32(i32 %N)
; CHECK: br label %while.body3.us
; CHECK-DEC: [[LOOP_DEC:%[^ ]+]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-REGDEC: [[REM:%[^ ]+]] = phi i32 [ %N, %while.cond1.preheader.us ], [ [[LOOP_DEC:%[^ ]+]], %while.body3.us ]
; CHECK-REGDEC: [[LOOP_DEC]] = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 [[REM]], i32 1)
; CHECK-REGDEC: [[CMP:%[^ ]+]] = icmp ne i32 [[LOOP_DEC]], 0
; CHECK-REGDEC: br i1 [[CMP]], label %while.body3.us, label %while.cond1.while.end_crit_edge.us
; CHECK-NESTED: [[LOOP_DEC1:%[^ ]+]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NESTED: br i1 [[LOOP_DEC1]], label %while.cond1.preheader.us, label %while.end7
define void @nested(i32* nocapture %A, i32 %N) {
entry:
%cmp20 = icmp eq i32 %N, 0
br i1 %cmp20, label %while.end7, label %while.cond1.preheader.us
while.cond1.preheader.us:
%i.021.us = phi i32 [ %inc6.us, %while.cond1.while.end_crit_edge.us ], [ 0, %entry ]
%mul.us = mul i32 %i.021.us, %N
br label %while.body3.us
while.body3.us:
%j.019.us = phi i32 [ 0, %while.cond1.preheader.us ], [ %inc.us, %while.body3.us ]
%add.us = add i32 %j.019.us, %mul.us
%arrayidx.us = getelementptr inbounds i32, i32* %A, i32 %add.us
store i32 %add.us, i32* %arrayidx.us, align 4
%inc.us = add nuw i32 %j.019.us, 1
%exitcond = icmp eq i32 %inc.us, %N
br i1 %exitcond, label %while.cond1.while.end_crit_edge.us, label %while.body3.us
while.cond1.while.end_crit_edge.us:
%inc6.us = add nuw i32 %i.021.us, 1
%exitcond23 = icmp eq i32 %inc6.us, %N
br i1 %exitcond23, label %while.end7, label %while.cond1.preheader.us
while.end7:
ret void
}
|
