thread-two-bbs-threshold.ll
2.21 KB
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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -jump-threading -jump-threading-threshold=3 -S -verify | FileCheck %s
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@a = global i32 0, align 4
; Show that freeze is not counted when comparing the cost with the threshold
define void @foo(i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TOBOOL:%.*]] = icmp eq i32 [[COND1:%.*]], 0
; CHECK-NEXT: br i1 [[TOBOOL]], label [[BB_COND2_THREAD:%.*]], label [[BB_COND2:%.*]]
; CHECK: bb.cond2:
; CHECK-NEXT: call void @f1()
; CHECK-NEXT: [[COND2_FR:%.*]] = freeze i32 [[COND2:%.*]]
; CHECK-NEXT: [[X:%.*]] = add i32 [[COND2_FR]], 1
; CHECK-NEXT: [[TOBOOL1:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: br i1 [[TOBOOL1]], label [[BB_F4:%.*]], label [[BB_F2:%.*]]
; CHECK: bb.cond2.thread:
; CHECK-NEXT: [[COND2_FR2:%.*]] = freeze i32 [[COND2]]
; CHECK-NEXT: [[X3:%.*]] = add i32 [[COND2_FR2]], 1
; CHECK-NEXT: [[TOBOOL14:%.*]] = icmp eq i32 [[X3]], 0
; CHECK-NEXT: br i1 [[TOBOOL14]], label [[BB_F3:%.*]], label [[BB_F2]]
; CHECK: bb.f2:
; CHECK-NEXT: call void @f2()
; CHECK-NEXT: br label [[EXIT:%.*]]
; CHECK: bb.f3:
; CHECK-NEXT: call void @f3()
; CHECK-NEXT: br label [[EXIT]]
; CHECK: bb.f4:
; CHECK-NEXT: [[PTR5:%.*]] = phi i32* [ null, [[BB_COND2]] ]
; CHECK-NEXT: call void @f4()
; CHECK-NEXT: br label [[EXIT]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%tobool = icmp eq i32 %cond1, 0
br i1 %tobool, label %bb.cond2, label %bb.f1
bb.f1:
call void @f1()
br label %bb.cond2
bb.cond2:
%ptr = phi i32* [ null, %bb.f1 ], [ @a, %entry ]
%cond2.fr = freeze i32 %cond2
%x = add i32 %cond2.fr, 1
%tobool1 = icmp eq i32 %x, 0
br i1 %tobool1, label %bb.file, label %bb.f2
bb.f2:
call void @f2()
br label %exit
bb.file:
%cmp = icmp eq i32* %ptr, null
br i1 %cmp, label %bb.f4, label %bb.f3
bb.f3:
call void @f3()
br label %exit
bb.f4:
call void @f4()
br label %exit
exit:
ret void
}
declare void @f1()
declare void @f2()
declare void @f3()
declare void @f4()