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.
10 ; CHECK: body = 524288
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'
28 ; CHECK: entry = 16384
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.
42 ; FIXME: It may be a bug that we don't sum back to 16384.
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'
53 ; CHECK: entry = 16384
55 switch i32 %i, label %case_a [ i32 1, label %case_b
58 i32 4, label %case_e ], !prof !1
68 ; The 'case_c' branch is predicted more likely via branch weight metadata.
69 ; CHECK: case_c = 13107
81 ; FIXME: It may be a bug that we don't sum back to 16384.
84 %result = phi i32 [ %a, %case_a ],
92 !1 = metadata !{metadata !"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}