1 ; RUN: opt < %s -slsr -gvn -dce -S | FileCheck %s
3 target datalayout = "e-i64:64-v16:16-v32:32-n16:32:64"
5 define i32 @slsr_gep(i32* %input, i64 %s) {
6 ; CHECK-LABEL: @slsr_gep(
8 %p0 = getelementptr inbounds i32, i32* %input, i64 0
9 %v0 = load i32, i32* %p0
12 %p1 = getelementptr inbounds i32, i32* %input, i64 %s
13 ; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %s
14 %v1 = load i32, i32* %p1
17 %s2 = shl nsw i64 %s, 1
18 %p2 = getelementptr inbounds i32, i32* %input, i64 %s2
19 ; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 %s
20 %v2 = load i32, i32* %p2
22 ; return v0 + v1 + v2;
28 define i32 @slsr_gep_sext(i32* %input, i32 %s) {
29 ; CHECK-LABEL: @slsr_gep_sext(
31 %p0 = getelementptr inbounds i32, i32* %input, i64 0
32 %v0 = load i32, i32* %p0
34 ; v1 = input[(long)s];
35 %t = sext i32 %s to i64
36 %p1 = getelementptr inbounds i32, i32* %input, i64 %t
37 ; CHECK: %p1 = getelementptr inbounds i32, i32* %input, i64 %t
38 %v1 = load i32, i32* %p1
40 ; v2 = input[(long)(s * 2)];
41 %s2 = shl nsw i32 %s, 1
42 %t2 = sext i32 %s2 to i64
43 %p2 = getelementptr inbounds i32, i32* %input, i64 %t2
44 ; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 %t
45 %v2 = load i32, i32* %p2
47 ; return v0 + v1 + v2;
53 define i32 @slsr_gep_2d([10 x [5 x i32]]* %input, i64 %s, i64 %t) {
54 ; CHECK-LABEL: @slsr_gep_2d(
56 %p0 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s, i64 %t
57 %v0 = load i32, i32* %p0
59 ; v1 = input[s * 2][t];
60 %s2 = shl nsw i64 %s, 1
61 ; CHECK: [[BUMP:%[a-zA-Z0-9]+]] = mul i64 %s, 5
62 %p1 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s2, i64 %t
63 ; CHECK: %p1 = getelementptr inbounds i32, i32* %p0, i64 [[BUMP]]
64 %v1 = load i32, i32* %p1
66 ; v2 = input[s * 3][t];
67 %s3 = mul nsw i64 %s, 3
68 %p2 = getelementptr inbounds [10 x [5 x i32]], [10 x [5 x i32]]* %input, i64 0, i64 %s3, i64 %t
69 ; CHECK: %p2 = getelementptr inbounds i32, i32* %p1, i64 [[BUMP]]
70 %v2 = load i32, i32* %p2
72 ; return v0 + v1 + v2;
78 %struct.S = type <{ i64, i32 }>
80 ; In this case, the bump
81 ; = (char *)&input[s * 2][t].f1 - (char *)&input[s][t].f1
83 ; which may not be divisible by typeof(input[s][t].f1) = 8. Therefore, we
84 ; rewrite the candidates using byte offset instead of index offset as in
86 define i64 @slsr_gep_uglygep([10 x [5 x %struct.S]]* %input, i64 %s, i64 %t) {
87 ; CHECK-LABEL: @slsr_gep_uglygep(
88 ; v0 = input[s][t].f1;
89 %p0 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s, i64 %t, i32 0
90 %v0 = load i64, i64* %p0
92 ; v1 = input[s * 2][t].f1;
93 %s2 = shl nsw i64 %s, 1
94 ; CHECK: [[BUMP:%[a-zA-Z0-9]+]] = mul i64 %s, 60
95 %p1 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s2, i64 %t, i32 0
96 ; CHECK: getelementptr inbounds i8, i8* %{{[0-9]+}}, i64 [[BUMP]]
97 %v1 = load i64, i64* %p1
99 ; v2 = input[s * 3][t].f1;
100 %s3 = mul nsw i64 %s, 3
101 %p2 = getelementptr inbounds [10 x [5 x %struct.S]], [10 x [5 x %struct.S]]* %input, i64 0, i64 %s3, i64 %t, i32 0
102 ; CHECK: getelementptr inbounds i8, i8* %{{[0-9]+}}, i64 [[BUMP]]
103 %v2 = load i64, i64* %p2
105 ; return v0 + v1 + v2;
106 %1 = add i64 %v0, %v1
111 define i32 @slsr_out_of_bounds_gep(i32* %input, i32 %s) {
112 ; CHECK-LABEL: @slsr_out_of_bounds_gep(
114 %p0 = getelementptr i32, i32* %input, i64 0
115 %v0 = load i32, i32* %p0
117 ; v1 = input[(long)s];
118 %t = sext i32 %s to i64
119 %p1 = getelementptr i32, i32* %input, i64 %t
120 ; CHECK: %p1 = getelementptr i32, i32* %input, i64 %t
121 %v1 = load i32, i32* %p1
123 ; v2 = input[(long)(s * 2)];
124 %s2 = shl nsw i32 %s, 1
125 %t2 = sext i32 %s2 to i64
126 %p2 = getelementptr i32, i32* %input, i64 %t2
127 ; CHECK: %p2 = getelementptr i32, i32* %p1, i64 %t
128 %v2 = load i32, i32* %p2
130 ; return v0 + v1 + v2;
131 %1 = add i32 %v0, %v1