source: icGREP/icgrep-devel/llvm-3.8.0.src/test/Analysis/BlockFrequencyInfo/bad_input.ll @ 5027

Last change on this file since 5027 was 5027, checked in by cameron, 3 years ago

Upgrade to llvm 3.8

File size: 1.4 KB
Line 
1; RUN: opt < %s -analyze -block-freq | FileCheck %s
2
3declare void @g(i32 %x)
4
5; CHECK-LABEL: Printing analysis {{.*}} for function 'branch_weight_0':
6; CHECK-NEXT: block-frequency-info: branch_weight_0
7define void @branch_weight_0(i32 %a) {
8; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
9entry:
10  br label %for.body
11
12; Check that we get 1 and a huge frequency instead of 0,3.
13; CHECK-NEXT: for.body: float = 2147483647.8,
14for.body:
15  %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
16  call void @g(i32 %i)
17  %inc = add i32 %i, 1
18  %cmp = icmp ugt i32 %inc, %a
19  br i1 %cmp, label %for.end, label %for.body, !prof !0
20
21; CHECK-NEXT: for.end: float = 1.0, int = [[ENTRY]]
22for.end:
23  ret void
24}
25
26!0 = !{!"branch_weights", i32 0, i32 3}
27
28; CHECK-LABEL: Printing analysis {{.*}} for function 'infinite_loop'
29; CHECK-NEXT: block-frequency-info: infinite_loop
30define void @infinite_loop(i1 %x) {
31; CHECK-NEXT: entry: float = 1.0, int = [[ENTRY:[0-9]+]]
32entry:
33  br i1 %x, label %for.body, label %for.end, !prof !1
34
35; Check that the infinite loop is arbitrarily scaled to max out at 4096,
36; giving 2048 here.
37; CHECK-NEXT: for.body: float = 2048.0,
38for.body:
39  %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
40  call void @g(i32 %i)
41  %inc = add i32 %i, 1
42  br label %for.body
43
44; Check that the exit weight is half of entry, since half is lost in the
45; infinite loop above.
46; CHECK-NEXT: for.end: float = 0.5,
47for.end:
48  ret void
49}
50
51!1 = !{!"branch_weights", i32 1, i32 1}
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