1 ; RUN: opt < %s -analyze -block-freq | FileCheck %s
3 define i32 @test1(i32 %i, i32* %a) {
4 ; CHECK: Printing analysis {{.*}} for function 'test1'
9 ; Loop backedges are weighted and thus their bodies have a greater frequency.
12 %iv = phi i32 [ 0, %entry ], [ %next, %body ]
13 %base = phi i32 [ 0, %entry ], [ %sum, %body ]
14 %arrayidx = getelementptr inbounds i32* %a, i32 %iv
15 %0 = load i32* %arrayidx
16 %sum = add nsw i32 %0, %base
17 %next = add i32 %iv, 1
18 %exitcond = icmp eq i32 %next, %i
19 br i1 %exitcond, label %exit, label %body
26 define i32 @test2(i32 %i, i32 %a, i32 %b) {
27 ; CHECK: Printing analysis {{.*}} for function 'test2'
30 %cond = icmp ult i32 %i, 42
31 br i1 %cond, label %then, label %else, !prof !0
33 ; The 'then' branch is predicted more likely via branch weight metadata.
34 ; CHECK: then = 0.94116
38 ; CHECK: else = 0.05877
42 ; FIXME: It may be a bug that we don't sum back to 1.0.
43 ; CHECK: exit = 0.99993
45 %result = phi i32 [ %a, %then ], [ %b, %else ]
49 !0 = metadata !{metadata !"branch_weights", i32 64, i32 4}
51 define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
52 ; CHECK: Printing analysis {{.*}} for function 'test3'
55 switch i32 %i, label %case_a [ i32 1, label %case_b
58 i32 4, label %case_e ], !prof !1
60 ; CHECK: case_a = 0.04998
64 ; CHECK: case_b = 0.04998
68 ; The 'case_c' branch is predicted more likely via branch weight metadata.
69 ; CHECK: case_c = 0.79998
73 ; CHECK: case_d = 0.04998
77 ; CHECK: case_e = 0.04998
81 ; FIXME: It may be a bug that we don't sum back to 1.0.
82 ; CHECK: exit = 0.99993
84 %result = phi i32 [ %a, %case_a ],
92 !1 = metadata !{metadata !"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
94 ; CHECK: Printing analysis {{.*}} for function 'nested_loops'
96 ; This test doesn't seem to be assigning sensible frequencies to nested loops.
97 define void @nested_loops(i32 %a) {
99 br label %for.cond1.preheader
102 %x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]
103 br label %for.cond4.preheader
106 %y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ]
107 %add = add i32 %y.023, %x.024
111 %z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
112 %add7 = add i32 %add, %z.022
113 tail call void @g(i32 %add7) #2
114 %inc = add i32 %z.022, 1
115 %cmp5 = icmp ugt i32 %inc, %a
116 br i1 %cmp5, label %for.inc8, label %for.body6, !prof !2
119 %inc9 = add i32 %y.023, 1
120 %cmp2 = icmp ugt i32 %inc9, %a
121 br i1 %cmp2, label %for.inc11, label %for.cond4.preheader, !prof !2
124 %inc12 = add i32 %x.024, 1
125 %cmp = icmp ugt i32 %inc12, %a
126 br i1 %cmp, label %for.end13, label %for.cond1.preheader, !prof !2
132 declare void @g(i32) #1
134 !2 = metadata !{metadata !"branch_weights", i32 1, i32 4000}