1; RUN: opt < %s -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -instcombine -S | FileCheck %s
2
3target 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"
4target triple = "x86_64-apple-macosx10.9.0"
5
6%struct.coordinate = type { i32, i32 }
7
8; Make sure that we don't generate a wide load when accessing the struct.
9; struct coordinate {
10;  int x;
11;  int y;
12; };
13;
14;
15; int foo(struct coordinate *A, int n) {
16;
17;   int sum = 0;
18;   for (int i = 0; i < n; ++i)
19;     sum += A[i].x;
20;
21;   return sum;
22; }
23
24;CHECK-LABEL: @foo(
25;CHECK-NOT: load <4 x i32>
26;CHECK: ret
27define i32 @foo(%struct.coordinate* nocapture %A, i32 %n) nounwind uwtable readonly ssp {
28entry:
29  %cmp4 = icmp sgt i32 %n, 0
30  br i1 %cmp4, label %for.body, label %for.end
31
32for.body:                                         ; preds = %entry, %for.body
33  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
34  %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
35  %x = getelementptr inbounds %struct.coordinate* %A, i64 %indvars.iv, i32 0
36  %0 = load i32* %x, align 4
37  %add = add nsw i32 %0, %sum.05
38  %indvars.iv.next = add i64 %indvars.iv, 1
39  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
40  %exitcond = icmp eq i32 %lftr.wideiv, %n
41  br i1 %exitcond, label %for.end, label %for.body
42
43for.end:                                          ; preds = %for.body, %entry
44  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
45  ret i32 %sum.0.lcssa
46}
47
48%struct.lit = type { i32 }
49
50; Verify that we still vectorize the access if the struct has the same size as
51; the loaded element.
52; struct lit {
53;  int x;
54; };
55;
56;
57; int bar(struct lit *A, int n) {
58;
59;   int sum = 0;
60;   for (int i = 0; i < n; ++i)
61;     sum += A[i].x;
62;
63;   return sum;
64; }
65
66;CHECK-LABEL: @bar(
67;CHECK: load <4 x i32>
68;CHECK: ret
69define i32 @bar(%struct.lit* nocapture %A, i32 %n) nounwind uwtable readonly ssp {
70entry:
71  %cmp4 = icmp sgt i32 %n, 0
72  br i1 %cmp4, label %for.body, label %for.end
73
74for.body:                                         ; preds = %entry, %for.body
75  %indvars.iv = phi i64 [ %indvars.iv.next, %for.body ], [ 0, %entry ]
76  %sum.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
77  %x = getelementptr inbounds %struct.lit* %A, i64 %indvars.iv, i32 0
78  %0 = load i32* %x, align 4
79  %add = add nsw i32 %0, %sum.05
80  %indvars.iv.next = add i64 %indvars.iv, 1
81  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
82  %exitcond = icmp eq i32 %lftr.wideiv, %n
83  br i1 %exitcond, label %for.end, label %for.body
84
85for.end:                                          ; preds = %for.body, %entry
86  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add, %for.body ]
87  ret i32 %sum.0.lcssa
88}
89