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
| ; RUN: llc -march=hexagon -enable-pipeliner -enable-pipeliner-opt-size \
; RUN: -verify-machineinstrs -hexagon-initial-cfg-cleanup=0 \
; RUN: -enable-aa-sched-mi=false -hexagon-expand-condsets=0 \
; RUN: < %s -pipeliner-experimental-cg=true | FileCheck %s
; Disable expand-condsets because it will assert on undefined registers.
; Test that we change the CFG correctly for pipelined loops where the trip
; count is a compile-time constant, and the trip count is the same as the
; number of prolog blocks (i.e., stages).
; CHECK: memb(r{{[0-9]+}}+#0) =
; CHECK: memb(r{{[0-9]+}}+#0) =
; Function Attrs: nounwind optsize
define void @f0(i1 %x) #0 {
b0:
br label %b1
b1: ; preds = %b5, %b0
%v0 = load i16, i16* undef, align 2, !tbaa !0
%v1 = sext i16 %v0 to i32
%v2 = load i16, i16* undef, align 2, !tbaa !0
%v3 = sext i16 %v2 to i32
%v4 = and i32 %v1, 7
%v5 = and i32 %v3, 7
br label %b2
b2: ; preds = %b4, %b1
br label %b3
b3: ; preds = %b3, %b2
%v6 = phi i32 [ 0, %b2 ], [ %v22, %b3 ]
%v7 = add i32 %v6, undef
%v8 = icmp slt i32 undef, %v7
%v9 = add nsw i32 %v7, 1
%v10 = select i1 %x, i32 1, i32 %v9
%v11 = add i32 %v10, 0
%v12 = getelementptr inbounds i8, i8* null, i32 %v11
%v13 = load i8, i8* %v12, align 1, !tbaa !4
%v14 = zext i8 %v13 to i32
%v15 = mul i32 %v14, %v4
%v16 = add i32 %v15, 0
%v17 = mul i32 %v16, %v5
%v18 = add i32 %v17, 32
%v19 = add i32 %v18, 0
%v20 = lshr i32 %v19, 6
%v21 = trunc i32 %v20 to i8
store i8 %v21, i8* undef, align 1, !tbaa !4
%v22 = add i32 %v6, 1
%v23 = icmp eq i32 %v22, 2
br i1 %v23, label %b4, label %b3
b4: ; preds = %b3
br i1 undef, label %b5, label %b2
b5: ; preds = %b4
br i1 undef, label %b1, label %b6
b6: ; preds = %b5
ret void
}
attributes #0 = { nounwind optsize "target-cpu"="hexagonv55" }
!0 = !{!1, !1, i64 0}
!1 = !{!"short", !2}
!2 = !{!"omnipotent char", !3}
!3 = !{!"Simple C/C++ TBAA"}
!4 = !{!2, !2, i64 0}
|