blob: a957adc65027ea067ac86699905675d2e12e41ce [file] [log] [blame]
Chandler Carruth343fad42011-10-19 10:12:41 +00001; RUN: opt < %s -analyze -block-freq | FileCheck %s
Adam Nemetc2f791d2016-07-13 05:01:48 +00002; RUN: opt < %s -analyze -lazy-block-freq | FileCheck %s
Xinliang David Li28a93272016-05-05 21:13:27 +00003; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
Chandler Carruth343fad42011-10-19 10:12:41 +00004
5define i32 @test1(i32 %i, i32* %a) {
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +00006; CHECK-LABEL: Printing analysis {{.*}} for function 'test1':
7; CHECK-NEXT: block-frequency-info: test1
8; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
Chandler Carruth343fad42011-10-19 10:12:41 +00009entry:
10 br label %body
11
12; Loop backedges are weighted and thus their bodies have a greater frequency.
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000013; CHECK-NEXT: body: float = 32.0,
Chandler Carruth343fad42011-10-19 10:12:41 +000014body:
15 %iv = phi i32 [ 0, %entry ], [ %next, %body ]
16 %base = phi i32 [ 0, %entry ], [ %sum, %body ]
David Blaikie79e6c742015-02-27 19:29:02 +000017 %arrayidx = getelementptr inbounds i32, i32* %a, i32 %iv
David Blaikiea79ac142015-02-27 21:17:42 +000018 %0 = load i32, i32* %arrayidx
Chandler Carruth343fad42011-10-19 10:12:41 +000019 %sum = add nsw i32 %0, %base
20 %next = add i32 %iv, 1
21 %exitcond = icmp eq i32 %next, %i
22 br i1 %exitcond, label %exit, label %body
23
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000024; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
Chandler Carruth343fad42011-10-19 10:12:41 +000025exit:
26 ret i32 %sum
27}
Chandler Carruthd27a7a92011-10-19 10:30:30 +000028
29define i32 @test2(i32 %i, i32 %a, i32 %b) {
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000030; CHECK-LABEL: Printing analysis {{.*}} for function 'test2':
31; CHECK-NEXT: block-frequency-info: test2
32; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
Chandler Carruthd27a7a92011-10-19 10:30:30 +000033entry:
34 %cond = icmp ult i32 %i, 42
35 br i1 %cond, label %then, label %else, !prof !0
36
37; The 'then' branch is predicted more likely via branch weight metadata.
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000038; CHECK-NEXT: then: float = 0.9411{{[0-9]*}},
Chandler Carruthd27a7a92011-10-19 10:30:30 +000039then:
40 br label %exit
41
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000042; CHECK-NEXT: else: float = 0.05882{{[0-9]*}},
Chandler Carruthd27a7a92011-10-19 10:30:30 +000043else:
44 br label %exit
45
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000046; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
Chandler Carruthd27a7a92011-10-19 10:30:30 +000047exit:
48 %result = phi i32 [ %a, %then ], [ %b, %else ]
49 ret i32 %result
50}
51
Duncan P. N. Exon Smithbe7ea192014-12-15 19:07:53 +000052!0 = !{!"branch_weights", i32 64, i32 4}
Chandler Carruthdeac50c2011-10-19 10:32:19 +000053
54define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000055; CHECK-LABEL: Printing analysis {{.*}} for function 'test3':
56; CHECK-NEXT: block-frequency-info: test3
57; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
Chandler Carruthdeac50c2011-10-19 10:32:19 +000058entry:
59 switch i32 %i, label %case_a [ i32 1, label %case_b
60 i32 2, label %case_c
61 i32 3, label %case_d
62 i32 4, label %case_e ], !prof !1
63
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000064; CHECK-NEXT: case_a: float = 0.05,
Chandler Carruthdeac50c2011-10-19 10:32:19 +000065case_a:
66 br label %exit
67
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000068; CHECK-NEXT: case_b: float = 0.05,
Chandler Carruthdeac50c2011-10-19 10:32:19 +000069case_b:
70 br label %exit
71
72; The 'case_c' branch is predicted more likely via branch weight metadata.
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000073; CHECK-NEXT: case_c: float = 0.8,
Chandler Carruthdeac50c2011-10-19 10:32:19 +000074case_c:
75 br label %exit
76
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000077; CHECK-NEXT: case_d: float = 0.05,
Chandler Carruthdeac50c2011-10-19 10:32:19 +000078case_d:
79 br label %exit
80
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000081; CHECK-NEXT: case_e: float = 0.05,
Chandler Carruthdeac50c2011-10-19 10:32:19 +000082case_e:
83 br label %exit
84
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000085; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
Chandler Carruthdeac50c2011-10-19 10:32:19 +000086exit:
87 %result = phi i32 [ %a, %case_a ],
88 [ %b, %case_b ],
89 [ %c, %case_c ],
90 [ %d, %case_d ],
91 [ %e, %case_e ]
92 ret i32 %result
93}
94
Duncan P. N. Exon Smithbe7ea192014-12-15 19:07:53 +000095!1 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +000096
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +000097define void @nested_loops(i32 %a) {
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +000098; CHECK-LABEL: Printing analysis {{.*}} for function 'nested_loops':
99; CHECK-NEXT: block-frequency-info: nested_loops
100; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000101entry:
102 br label %for.cond1.preheader
103
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +0000104; CHECK-NEXT: for.cond1.preheader: float = 4001.0,
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000105for.cond1.preheader:
106 %x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]
107 br label %for.cond4.preheader
108
Cong Hou15ea0162015-09-25 23:09:59 +0000109; CHECK-NEXT: for.cond4.preheader: float = 16007984.8,
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000110for.cond4.preheader:
111 %y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ]
112 %add = add i32 %y.023, %x.024
113 br label %for.body6
114
Cong Hou15ea0162015-09-25 23:09:59 +0000115; CHECK-NEXT: for.body6: float = 64047914563.9,
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000116for.body6:
117 %z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
118 %add7 = add i32 %add, %z.022
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +0000119 tail call void @g(i32 %add7)
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000120 %inc = add i32 %z.022, 1
121 %cmp5 = icmp ugt i32 %inc, %a
122 br i1 %cmp5, label %for.inc8, label %for.body6, !prof !2
123
Cong Hou15ea0162015-09-25 23:09:59 +0000124; CHECK-NEXT: for.inc8: float = 16007984.8,
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000125for.inc8:
126 %inc9 = add i32 %y.023, 1
127 %cmp2 = icmp ugt i32 %inc9, %a
128 br i1 %cmp2, label %for.inc11, label %for.cond4.preheader, !prof !2
129
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +0000130; CHECK-NEXT: for.inc11: float = 4001.0,
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000131for.inc11:
132 %inc12 = add i32 %x.024, 1
133 %cmp = icmp ugt i32 %inc12, %a
134 br i1 %cmp, label %for.end13, label %for.cond1.preheader, !prof !2
135
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +0000136; CHECK-NEXT: for.end13: float = 1.0, int = [[ENTRY]]
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000137for.end13:
138 ret void
139}
140
Duncan P. N. Exon Smith10be9a82014-04-21 17:57:07 +0000141declare void @g(i32)
Jakob Stoklund Olesen0b075102013-06-28 22:40:43 +0000142
Duncan P. N. Exon Smithbe7ea192014-12-15 19:07:53 +0000143!2 = !{!"branch_weights", i32 1, i32 4000}