1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
| ; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
define void @test(i1 %cnd) !prof !{!"function_entry_count", i64 1024} {
; CHECK-LABEL: @test
; Using the assembly comments to indicate block order..
; CHECK: # %loop
; CHECK: # %backedge
; CHECK: # %exit
; CHECK: # %rare
; CHECK: # %rare.1
br i1 undef, label %rare.1, label %preheader, !prof !{!"branch_weights", i32 0, i32 1000}
rare.1:
call void @foo()
br label %preheader
preheader:
br label %loop
loop:
%iv = phi i32 [0, %preheader], [%iv.next, %backedge]
call void @foo()
br i1 %cnd, label %backedge, label %rare, !prof !{!"branch_weights", i32 1000000, i32 1}
rare:
call void @foo()
br label %backedge
backedge:
call void @foo()
%iv.next = add i32 %iv, 1
%cmp = icmp eq i32 %iv.next, 200
br i1 %cmp, label %loop, label %exit, !prof !{!"branch_weights", i32 1000, i32 1}
exit:
ret void
}
declare void @foo()
|