1 ; RUN: opt < %s -memcpyopt -S | FileCheck %s
3 ; All the stores in this example should be merged into a single memset.
5 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
6 target triple = "i386-apple-darwin8"
8 define void @test1(i8 signext %c) nounwind {
10 %x = alloca [19 x i8] ; <[19 x i8]*> [#uses=20]
11 %tmp = getelementptr [19 x i8]* %x, i32 0, i32 0 ; <i8*> [#uses=1]
12 store i8 %c, i8* %tmp, align 1
13 %tmp5 = getelementptr [19 x i8]* %x, i32 0, i32 1 ; <i8*> [#uses=1]
14 store i8 %c, i8* %tmp5, align 1
15 %tmp9 = getelementptr [19 x i8]* %x, i32 0, i32 2 ; <i8*> [#uses=1]
16 store i8 %c, i8* %tmp9, align 1
17 %tmp13 = getelementptr [19 x i8]* %x, i32 0, i32 3 ; <i8*> [#uses=1]
18 store i8 %c, i8* %tmp13, align 1
19 %tmp17 = getelementptr [19 x i8]* %x, i32 0, i32 4 ; <i8*> [#uses=1]
20 store i8 %c, i8* %tmp17, align 1
21 %tmp21 = getelementptr [19 x i8]* %x, i32 0, i32 5 ; <i8*> [#uses=1]
22 store i8 %c, i8* %tmp21, align 1
23 %tmp25 = getelementptr [19 x i8]* %x, i32 0, i32 6 ; <i8*> [#uses=1]
24 store i8 %c, i8* %tmp25, align 1
25 %tmp29 = getelementptr [19 x i8]* %x, i32 0, i32 7 ; <i8*> [#uses=1]
26 store i8 %c, i8* %tmp29, align 1
27 %tmp33 = getelementptr [19 x i8]* %x, i32 0, i32 8 ; <i8*> [#uses=1]
28 store i8 %c, i8* %tmp33, align 1
29 %tmp37 = getelementptr [19 x i8]* %x, i32 0, i32 9 ; <i8*> [#uses=1]
30 store i8 %c, i8* %tmp37, align 1
31 %tmp41 = getelementptr [19 x i8]* %x, i32 0, i32 10 ; <i8*> [#uses=1]
32 store i8 %c, i8* %tmp41, align 1
33 %tmp45 = getelementptr [19 x i8]* %x, i32 0, i32 11 ; <i8*> [#uses=1]
34 store i8 %c, i8* %tmp45, align 1
35 %tmp49 = getelementptr [19 x i8]* %x, i32 0, i32 12 ; <i8*> [#uses=1]
36 store i8 %c, i8* %tmp49, align 1
37 %tmp53 = getelementptr [19 x i8]* %x, i32 0, i32 13 ; <i8*> [#uses=1]
38 store i8 %c, i8* %tmp53, align 1
39 %tmp57 = getelementptr [19 x i8]* %x, i32 0, i32 14 ; <i8*> [#uses=1]
40 store i8 %c, i8* %tmp57, align 1
41 %tmp61 = getelementptr [19 x i8]* %x, i32 0, i32 15 ; <i8*> [#uses=1]
42 store i8 %c, i8* %tmp61, align 1
43 %tmp65 = getelementptr [19 x i8]* %x, i32 0, i32 16 ; <i8*> [#uses=1]
44 store i8 %c, i8* %tmp65, align 1
45 %tmp69 = getelementptr [19 x i8]* %x, i32 0, i32 17 ; <i8*> [#uses=1]
46 store i8 %c, i8* %tmp69, align 1
47 %tmp73 = getelementptr [19 x i8]* %x, i32 0, i32 18 ; <i8*> [#uses=1]
48 store i8 %c, i8* %tmp73, align 1
49 %tmp76 = call i32 (...)* @bar( [19 x i8]* %x ) nounwind
53 ; CHECK: call void @llvm.memset.p0i8.i64
61 %struct.MV = type { i16, i16 }
63 define void @test2() nounwind {
65 %ref_idx = alloca [8 x i8] ; <[8 x i8]*> [#uses=8]
66 %left_mvd = alloca [8 x %struct.MV] ; <[8 x %struct.MV]*> [#uses=17]
67 %up_mvd = alloca [8 x %struct.MV] ; <[8 x %struct.MV]*> [#uses=17]
68 %tmp20 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 7 ; <i8*> [#uses=1]
69 store i8 -1, i8* %tmp20, align 1
70 %tmp23 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 6 ; <i8*> [#uses=1]
71 store i8 -1, i8* %tmp23, align 1
72 %tmp26 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 5 ; <i8*> [#uses=1]
73 store i8 -1, i8* %tmp26, align 1
74 %tmp29 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 4 ; <i8*> [#uses=1]
75 store i8 -1, i8* %tmp29, align 1
76 %tmp32 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 3 ; <i8*> [#uses=1]
77 store i8 -1, i8* %tmp32, align 1
78 %tmp35 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 2 ; <i8*> [#uses=1]
79 store i8 -1, i8* %tmp35, align 1
80 %tmp38 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 1 ; <i8*> [#uses=1]
81 store i8 -1, i8* %tmp38, align 1
82 %tmp41 = getelementptr [8 x i8]* %ref_idx, i32 0, i32 0 ; <i8*> [#uses=2]
83 store i8 -1, i8* %tmp41, align 1
84 %tmp43 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 7, i32 0 ; <i16*> [#uses=1]
85 store i16 0, i16* %tmp43, align 2
86 %tmp46 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 7, i32 1 ; <i16*> [#uses=1]
87 store i16 0, i16* %tmp46, align 2
88 %tmp57 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 6, i32 0 ; <i16*> [#uses=1]
89 store i16 0, i16* %tmp57, align 2
90 %tmp60 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 6, i32 1 ; <i16*> [#uses=1]
91 store i16 0, i16* %tmp60, align 2
92 %tmp71 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 5, i32 0 ; <i16*> [#uses=1]
93 store i16 0, i16* %tmp71, align 2
94 %tmp74 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 5, i32 1 ; <i16*> [#uses=1]
95 store i16 0, i16* %tmp74, align 2
96 %tmp85 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 4, i32 0 ; <i16*> [#uses=1]
97 store i16 0, i16* %tmp85, align 2
98 %tmp88 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 4, i32 1 ; <i16*> [#uses=1]
99 store i16 0, i16* %tmp88, align 2
100 %tmp99 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 3, i32 0 ; <i16*> [#uses=1]
101 store i16 0, i16* %tmp99, align 2
102 %tmp102 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 3, i32 1 ; <i16*> [#uses=1]
103 store i16 0, i16* %tmp102, align 2
104 %tmp113 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 2, i32 0 ; <i16*> [#uses=1]
105 store i16 0, i16* %tmp113, align 2
106 %tmp116 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 2, i32 1 ; <i16*> [#uses=1]
107 store i16 0, i16* %tmp116, align 2
108 %tmp127 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 1, i32 0 ; <i16*> [#uses=1]
109 store i16 0, i16* %tmp127, align 2
110 %tmp130 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 1, i32 1 ; <i16*> [#uses=1]
111 store i16 0, i16* %tmp130, align 2
112 %tmp141 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 0, i32 0 ; <i16*> [#uses=1]
113 store i16 0, i16* %tmp141, align 8
114 %tmp144 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 0, i32 1 ; <i16*> [#uses=1]
115 store i16 0, i16* %tmp144, align 2
116 %tmp148 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 7, i32 0 ; <i16*> [#uses=1]
117 store i16 0, i16* %tmp148, align 2
118 %tmp151 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 7, i32 1 ; <i16*> [#uses=1]
119 store i16 0, i16* %tmp151, align 2
120 %tmp162 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 6, i32 0 ; <i16*> [#uses=1]
121 store i16 0, i16* %tmp162, align 2
122 %tmp165 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 6, i32 1 ; <i16*> [#uses=1]
123 store i16 0, i16* %tmp165, align 2
124 %tmp176 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 5, i32 0 ; <i16*> [#uses=1]
125 store i16 0, i16* %tmp176, align 2
126 %tmp179 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 5, i32 1 ; <i16*> [#uses=1]
127 store i16 0, i16* %tmp179, align 2
128 %tmp190 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 4, i32 0 ; <i16*> [#uses=1]
129 store i16 0, i16* %tmp190, align 2
130 %tmp193 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 4, i32 1 ; <i16*> [#uses=1]
131 store i16 0, i16* %tmp193, align 2
132 %tmp204 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 3, i32 0 ; <i16*> [#uses=1]
133 store i16 0, i16* %tmp204, align 2
134 %tmp207 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 3, i32 1 ; <i16*> [#uses=1]
135 store i16 0, i16* %tmp207, align 2
136 %tmp218 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 2, i32 0 ; <i16*> [#uses=1]
137 store i16 0, i16* %tmp218, align 2
138 %tmp221 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 2, i32 1 ; <i16*> [#uses=1]
139 store i16 0, i16* %tmp221, align 2
140 %tmp232 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 1, i32 0 ; <i16*> [#uses=1]
141 store i16 0, i16* %tmp232, align 2
142 %tmp235 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 1, i32 1 ; <i16*> [#uses=1]
143 store i16 0, i16* %tmp235, align 2
144 %tmp246 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 0, i32 0 ; <i16*> [#uses=1]
145 store i16 0, i16* %tmp246, align 8
146 %tmp249 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 0, i32 1 ; <i16*> [#uses=1]
147 store i16 0, i16* %tmp249, align 2
148 %up_mvd252 = getelementptr [8 x %struct.MV]* %up_mvd, i32 0, i32 0 ; <%struct.MV*> [#uses=1]
149 %left_mvd253 = getelementptr [8 x %struct.MV]* %left_mvd, i32 0, i32 0 ; <%struct.MV*> [#uses=1]
150 call void @foo( %struct.MV* %up_mvd252, %struct.MV* %left_mvd253, i8* %tmp41 ) nounwind
155 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %tmp41, i8 -1, i64 8, i32 1, i1 false)
157 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 32, i32 8, i1 false)
159 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 32, i32 8, i1 false)
164 declare void @foo(%struct.MV*, %struct.MV*, i8*)
167 ; Store followed by memset.
168 define void @test3(i32* nocapture %P) nounwind ssp {
170 %arrayidx = getelementptr inbounds i32* %P, i64 1
171 store i32 0, i32* %arrayidx, align 4
172 %add.ptr = getelementptr inbounds i32* %P, i64 2
173 %0 = bitcast i32* %add.ptr to i8*
174 tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
178 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
181 ; store followed by memset, different offset scenario
182 define void @test4(i32* nocapture %P) nounwind ssp {
184 store i32 0, i32* %P, align 4
185 %add.ptr = getelementptr inbounds i32* %P, i64 1
186 %0 = bitcast i32* %add.ptr to i8*
187 tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
191 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
194 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind
196 ; Memset followed by store.
197 define void @test5(i32* nocapture %P) nounwind ssp {
199 %add.ptr = getelementptr inbounds i32* %P, i64 2
200 %0 = bitcast i32* %add.ptr to i8*
201 tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 11, i32 1, i1 false)
202 %arrayidx = getelementptr inbounds i32* %P, i64 1
203 store i32 0, i32* %arrayidx, align 4
207 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 15, i32 4, i1 false)
210 ;; Memset followed by memset.
211 define void @test6(i32* nocapture %P) nounwind ssp {
213 %0 = bitcast i32* %P to i8*
214 tail call void @llvm.memset.p0i8.i64(i8* %0, i8 0, i64 12, i32 1, i1 false)
215 %add.ptr = getelementptr inbounds i32* %P, i64 3
216 %1 = bitcast i32* %add.ptr to i8*
217 tail call void @llvm.memset.p0i8.i64(i8* %1, i8 0, i64 12, i32 1, i1 false)
220 ; CHECK: call void @llvm.memset.p0i8.i64(i8* %2, i8 0, i64 24, i32 1, i1 false)