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
|
; RUN: opt -passes='default<O1>' -disable-verify --mtriple x86_64-pc-linux-gnu -disable-loop-unrolling=true \
; RUN: -S -o - %s | FileCheck %s
; This checks that the loop full unroller will fire in the new pass manager
; when forced via #pragma in the source (or annotation in the code).
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"
; We don't end up deleting the loop, merely turning it infinite, but we remove
; everything inside of it so check for the loop structure and absence of
; conditional branches.
; CHECK-LABEL: bb
; CHECK: br label
; CHECK-NOT: br i1
; CHECK: br label
; CHECK-NOT: br i1
; Function Attrs: noinline nounwind optnone uwtable
define void @foo() #0 {
bb:
%tmp = alloca [5 x i32*], align 16
%tmp1 = alloca i32, align 4
%tmp2 = alloca i32, align 4
store i32 5, i32* %tmp1, align 4
br label %bb3
bb3: ; preds = %bb23, %bb
%tmp4 = load i32, i32* %tmp1, align 4
%tmp5 = icmp ne i32 %tmp4, 0
br i1 %tmp5, label %bb6, label %bb24
bb6: ; preds = %bb3
store i32 0, i32* %tmp2, align 4
br label %bb7
bb7: ; preds = %bb20, %bb6
%tmp8 = load i32, i32* %tmp2, align 4
%tmp9 = icmp slt i32 %tmp8, 5
br i1 %tmp9, label %bb10, label %bb23
bb10: ; preds = %bb7
%tmp11 = load i32, i32* %tmp2, align 4
%tmp12 = sext i32 %tmp11 to i64
%tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %tmp12
%tmp14 = load i32*, i32** %tmp13, align 8
%tmp15 = icmp ne i32* %tmp14, null
br i1 %tmp15, label %bb16, label %bb19
bb16: ; preds = %bb10
%tmp17 = load i32, i32* %tmp1, align 4
%tmp18 = add nsw i32 %tmp17, -1
store i32 %tmp18, i32* %tmp1, align 4
br label %bb19
bb19: ; preds = %bb16, %bb10
br label %bb20
bb20: ; preds = %bb19
%tmp21 = load i32, i32* %tmp2, align 4
%tmp22 = add nsw i32 %tmp21, 1
store i32 %tmp22, i32* %tmp2, align 4
br label %bb7, !llvm.loop !1
bb23: ; preds = %bb7
br label %bb3
bb24: ; preds = %bb3
ret void
}
attributes #0 = { noinline nounwind optnone uwtable }
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = distinct !{!1, !2}
!2 = !{!"llvm.loop.unroll.full"}
|
