struct_access.ll
2.69 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
81
82
83
84
85
86
87
; RUN: opt < %s -loop-vectorize -force-vector-interleave=1 -force-vector-width=4 -instcombine -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
%struct.coordinate = type { i32, i32 }
; Make sure that we don't generate a wide load when accessing the struct.
; struct coordinate {
; int x;
; int y;
; };
;
;
; int foo(struct coordinate *A, int n) {
;
; int sum = 0;
; for (int i = 0; i < n; ++i)
; sum += A[i].x;
;
; return sum;
; }
;CHECK-LABEL: @foo(
;CHECK-NOT: load <4 x i32>
;CHECK: ret
define i32 @foo(%struct.coordinate* nocapture %A, i32 %n) nounwind uwtable readonly ssp {
entry:
%cmp4 = icmp sgt i32 %n, 0
br i1 %cmp4, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
%sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
%x = getelementptr inbounds %struct.coordinate, %struct.coordinate* %A, i64 %indvars.iv, i32 0
%0 = load i32, i32* %x, align 4
%add = add nsw i32 %0, %sum.05
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
ret i32 %sum.0.lcssa
}
%struct.lit = type { i32 }
; Verify that we still vectorize the access if the struct has the same size as
; the loaded element.
; struct lit {
; int x;
; };
;
;
; int bar(struct lit *A, int n) {
;
; int sum = 0;
; for (int i = 0; i < n; ++i)
; sum += A[i].x;
;
; return sum;
; }
;CHECK-LABEL: @bar(
;CHECK: load <4 x i32>
;CHECK: ret
define i32 @bar(%struct.lit* nocapture %A, i32 %n) nounwind uwtable readonly ssp {
entry:
%cmp4 = icmp sgt i32 %n, 0
br i1 %cmp4, label %for.body, label %for.end
for.body: ; preds = %entry, %for.body
%indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
%sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
%x = getelementptr inbounds %struct.lit, %struct.lit* %A, i64 %indvars.iv, i32 0
%0 = load i32, i32* %x, align 4
%add = add nsw i32 %0, %sum.05
%indvars.iv.next = add i64 %indvars.iv, 1
%lftr.wideiv = trunc i64 %indvars.iv.next to i32
%exitcond = icmp eq i32 %lftr.wideiv, %n
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
%sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
ret i32 %sum.0.lcssa
}