1 ; RUN: opt < %s -analyze -block-freq | FileCheck %s
2 ; RUN: opt < %s -analyze -lazy-block-freq | FileCheck %s
3 ; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
5 define i32 @test1(i32 %i, i32* %a) {
6 ; 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]+]]
12 ; Loop backedges are weighted and thus their bodies have a greater frequency.
13 ; CHECK-NEXT: body: float = 32.0,
15 %iv = phi i32 [ 0, %entry ], [ %next, %body ]
16 %base = phi i32 [ 0, %entry ], [ %sum, %body ]
17 %arrayidx = getelementptr inbounds i32, i32* %a, i32 %iv
18 %0 = load i32, i32* %arrayidx
19 %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
24 ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
29 define i32 @test2(i32 %i, i32 %a, i32 %b) {
30 ; 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]+]]
34 %cond = icmp ult i32 %i, 42
35 br i1 %cond, label %then, label %else, !prof !0
37 ; The 'then' branch is predicted more likely via branch weight metadata.
38 ; CHECK-NEXT: then: float = 0.9411{{[0-9]*}},
42 ; CHECK-NEXT: else: float = 0.05882{{[0-9]*}},
46 ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
48 %result = phi i32 [ %a, %then ], [ %b, %else ]
52 !0 = !{!"branch_weights", i32 64, i32 4}
54 define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
55 ; 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]+]]
59 switch i32 %i, label %case_a [ i32 1, label %case_b
62 i32 4, label %case_e ], !prof !1
64 ; CHECK-NEXT: case_a: float = 0.05,
68 ; CHECK-NEXT: case_b: float = 0.05,
72 ; The 'case_c' branch is predicted more likely via branch weight metadata.
73 ; CHECK-NEXT: case_c: float = 0.8,
77 ; CHECK-NEXT: case_d: float = 0.05,
81 ; CHECK-NEXT: case_e: float = 0.05,
85 ; CHECK-NEXT: exit: float = 1.0, int = [[ENTRY]]
87 %result = phi i32 [ %a, %case_a ],
95 !1 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
97 define void @nested_loops(i32 %a) {
98 ; 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]+]]
102 br label %for.cond1.preheader
104 ; CHECK-NEXT: for.cond1.preheader: float = 4001.0,
106 %x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]
107 br label %for.cond4.preheader
109 ; CHECK-NEXT: for.cond4.preheader: float = 16007984.8,
111 %y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ]
112 %add = add i32 %y.023, %x.024
115 ; CHECK-NEXT: for.body6: float = 64047914563.9,
117 %z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
118 %add7 = add i32 %add, %z.022
119 tail call void @g(i32 %add7)
120 %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
124 ; CHECK-NEXT: for.inc8: float = 16007984.8,
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
130 ; CHECK-NEXT: for.inc11: float = 4001.0,
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
136 ; CHECK-NEXT: for.end13: float = 1.0, int = [[ENTRY]]
143 !2 = !{!"branch_weights", i32 1, i32 4000}