1 ; RUN: opt < %s -analyze -block-freq | FileCheck %s
2 ; RUN: opt < %s -passes='print<block-freq>' -disable-output 2>&1 | FileCheck %s
4 declare void @g(i32 %x)
6 ; CHECK-LABEL: Printing analysis {{.*}} for function 'branch_weight_0':
7 ; CHECK-NEXT: block-frequency-info: branch_weight_0
8 define void @branch_weight_0(i32 %a) {
9 ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
13 ; Check that we get 1 and a huge frequency instead of 0,3.
14 ; CHECK-NEXT: for.body: float = 2147483647.8,
16 %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
19 %cmp = icmp ugt i32 %inc, %a
20 br i1 %cmp, label %for.end, label %for.body, !prof !0
22 ; CHECK-NEXT: for.end: float = 1.0, int = [[ENTRY]]
27 !0 = !{!"branch_weights", i32 0, i32 3}
29 ; CHECK-LABEL: Printing analysis {{.*}} for function 'infinite_loop'
30 ; CHECK-NEXT: block-frequency-info: infinite_loop
31 define void @infinite_loop(i1 %x) {
32 ; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
34 br i1 %x, label %for.body, label %for.end, !prof !1
36 ; Check that the infinite loop is arbitrarily scaled to max out at 4096,
38 ; CHECK-NEXT: for.body: float = 2048.0,
40 %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
45 ; Check that the exit weight is half of entry, since half is lost in the
46 ; infinite loop above.
47 ; CHECK-NEXT: for.end: float = 0.5,
52 !1 = !{!"branch_weights", i32 1, i32 1}