1 ; RUN: opt < %s -sroa -S | FileCheck %s
2 ; RUN: opt -debugify -sroa -S < %s | FileCheck %s -check-prefix DEBUGLOC
4 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
6 declare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i1)
8 define void @test1({ i8, i8 }* %a, { i8, i8 }* %b) {
10 ; CHECK: %[[gep_a0:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %a, i64 0, i32 0
11 ; CHECK: %[[a0:.*]] = load i8, i8* %[[gep_a0]], align 16
12 ; CHECK: %[[gep_a1:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %a, i64 0, i32 1
13 ; CHECK: %[[a1:.*]] = load i8, i8* %[[gep_a1]], align 1
14 ; CHECK: %[[gep_b0:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %b, i64 0, i32 0
15 ; CHECK: store i8 %[[a0]], i8* %[[gep_b0]], align 16
16 ; CHECK: %[[gep_b1:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %b, i64 0, i32 1
17 ; CHECK: store i8 %[[a1]], i8* %[[gep_b1]], align 1
21 %alloca = alloca { i8, i8 }, align 16
22 %gep_a = getelementptr { i8, i8 }, { i8, i8 }* %a, i32 0, i32 0
23 %gep_alloca = getelementptr { i8, i8 }, { i8, i8 }* %alloca, i32 0, i32 0
24 %gep_b = getelementptr { i8, i8 }, { i8, i8 }* %b, i32 0, i32 0
26 store i8 420, i8* %gep_alloca, align 16
28 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %gep_alloca, i8* align 16 %gep_a, i32 2, i1 false)
29 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 16 %gep_b, i8* align 16 %gep_alloca, i32 2, i1 false)
33 define void @test2() {
34 ; CHECK-LABEL: @test2(
36 ; CHECK: load i8, i8* %{{.*}}
37 ; CHECK: store i8 42, i8* %{{.*}}
40 ; Check that when sroa rewrites the alloca partition
41 ; it preserves the original DebugLocation.
42 ; DEBUGLOC-LABEL: @test2(
43 ; DEBUGLOC: {{.*}} = alloca {{.*}} !dbg ![[DbgLoc:[0-9]+]]
46 ; DEBUGLOC: ![[DbgLoc]] = !DILocation(line: 9,
49 %a = alloca { i8, i8, i8, i8 }, align 2 ; "line 9" to -debugify
50 %gep1 = getelementptr { i8, i8, i8, i8 }, { i8, i8, i8, i8 }* %a, i32 0, i32 1
51 %cast1 = bitcast i8* %gep1 to i16*
52 store volatile i16 0, i16* %cast1
53 %gep2 = getelementptr { i8, i8, i8, i8 }, { i8, i8, i8, i8 }* %a, i32 0, i32 2
54 %result = load i8, i8* %gep2
55 store i8 42, i8* %gep2
59 define void @PR13920(<2 x i64>* %a, i16* %b) {
60 ; Test that alignments on memcpy intrinsics get propagated to loads and stores.
61 ; CHECK-LABEL: @PR13920(
62 ; CHECK: load <2 x i64>, <2 x i64>* %a, align 2
63 ; CHECK: store <2 x i64> {{.*}}, <2 x i64>* {{.*}}, align 2
67 %aa = alloca <2 x i64>, align 16
68 %aptr = bitcast <2 x i64>* %a to i8*
69 %aaptr = bitcast <2 x i64>* %aa to i8*
70 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %aaptr, i8* align 2 %aptr, i32 16, i1 false)
71 %bptr = bitcast i16* %b to i8*
72 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %bptr, i8* align 2 %aaptr, i32 16, i1 false)
76 define void @test3(i8* %x) {
77 ; Test that when we promote an alloca to a type with lower ABI alignment, we
78 ; provide the needed explicit alignment that code using the alloca may be
79 ; expecting. However, also check that any offset within an alloca can in turn
80 ; reduce the alignment.
81 ; CHECK-LABEL: @test3(
82 ; CHECK: alloca [22 x i8], align 8
83 ; CHECK: alloca [18 x i8], align 2
87 %a = alloca { i8*, i8*, i8* }
88 %b = alloca { i8*, i8*, i8* }
89 %a_raw = bitcast { i8*, i8*, i8* }* %a to i8*
90 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 8 %a_raw, i8* align 8 %x, i32 22, i1 false)
91 %b_raw = bitcast { i8*, i8*, i8* }* %b to i8*
92 %b_gep = getelementptr i8, i8* %b_raw, i32 6
93 call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 2 %b_gep, i8* align 2 %x, i32 18, i1 false)
97 define void @test5() {
98 ; Test that we preserve underaligned loads and stores when splitting. The use
99 ; of volatile in this test case is just to force the loads and stores to not be
100 ; split or promoted out of existence.
102 ; CHECK-LABEL: @test5(
103 ; CHECK: alloca [9 x i8]
104 ; CHECK: alloca [9 x i8]
105 ; CHECK: store volatile double 0.0{{.*}}, double* %{{.*}}, align 1
106 ; CHECK: load volatile i16, i16* %{{.*}}, align 1
107 ; CHECK: load double, double* %{{.*}}, align 1
108 ; CHECK: store volatile double %{{.*}}, double* %{{.*}}, align 1
109 ; CHECK: load volatile i16, i16* %{{.*}}, align 1
113 %a = alloca [18 x i8]
114 %raw1 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 0
115 %ptr1 = bitcast i8* %raw1 to double*
116 store volatile double 0.0, double* %ptr1, align 1
117 %weird_gep1 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 7
118 %weird_cast1 = bitcast i8* %weird_gep1 to i16*
119 %weird_load1 = load volatile i16, i16* %weird_cast1, align 1
121 %raw2 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 9
122 %ptr2 = bitcast i8* %raw2 to double*
123 %d1 = load double, double* %ptr1, align 1
124 store volatile double %d1, double* %ptr2, align 1
125 %weird_gep2 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 16
126 %weird_cast2 = bitcast i8* %weird_gep2 to i16*
127 %weird_load2 = load volatile i16, i16* %weird_cast2, align 1
132 define void @test6() {
133 ; Test that we promote alignment when the underlying alloca switches to one
134 ; that innately provides it.
135 ; CHECK-LABEL: @test6(
136 ; CHECK: alloca double
137 ; CHECK: alloca double
142 %a = alloca [16 x i8]
143 %raw1 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 0
144 %ptr1 = bitcast i8* %raw1 to double*
145 store volatile double 0.0, double* %ptr1, align 1
147 %raw2 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 8
148 %ptr2 = bitcast i8* %raw2 to double*
149 %val = load double, double* %ptr1, align 1
150 store volatile double %val, double* %ptr2, align 1
155 define void @test7(i8* %out) {
156 ; Test that we properly compute the destination alignment when rewriting
157 ; memcpys as direct loads or stores.
158 ; CHECK-LABEL: @test7(
162 %a = alloca [16 x i8]
163 %raw1 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 0
164 %ptr1 = bitcast i8* %raw1 to double*
165 %raw2 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 8
166 %ptr2 = bitcast i8* %raw2 to double*
168 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %raw1, i8* %out, i32 16, i1 false)
169 ; CHECK: %[[val2:.*]] = load double, double* %{{.*}}, align 1
170 ; CHECK: %[[val1:.*]] = load double, double* %{{.*}}, align 1
172 %val1 = load double, double* %ptr2, align 1
173 %val2 = load double, double* %ptr1, align 1
175 store double %val1, double* %ptr1, align 1
176 store double %val2, double* %ptr2, align 1
178 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %out, i8* %raw1, i32 16, i1 false)
179 ; CHECK: store double %[[val1]], double* %{{.*}}, align 1
180 ; CHECK: store double %[[val2]], double* %{{.*}}, align 1
186 define void @test8() {
187 ; CHECK-LABEL: @test8(
188 ; CHECK: load i32, {{.*}}, align 1
189 ; CHECK: load i32, {{.*}}, align 1
190 ; CHECK: load i32, {{.*}}, align 1
191 ; CHECK: load i32, {{.*}}, align 1
192 ; CHECK: load i32, {{.*}}, align 1
194 %ptr = alloca [5 x i32], align 1
195 %ptr.8 = bitcast [5 x i32]* %ptr to i8*
196 call void @populate(i8* %ptr.8)
197 %val = load [5 x i32], [5 x i32]* %ptr, align 1
201 define void @test9() {
202 ; CHECK-LABEL: @test9(
203 ; CHECK: load i32, {{.*}}, align 8
204 ; CHECK: load i32, {{.*}}, align 4
205 ; CHECK: load i32, {{.*}}, align 8
206 ; CHECK: load i32, {{.*}}, align 4
207 ; CHECK: load i32, {{.*}}, align 8
209 %ptr = alloca [5 x i32], align 8
210 %ptr.8 = bitcast [5 x i32]* %ptr to i8*
211 call void @populate(i8* %ptr.8)
212 %val = load [5 x i32], [5 x i32]* %ptr, align 8
216 define void @test10() {
217 ; CHECK-LABEL: @test10(
218 ; CHECK: load i32, {{.*}}, align 2
219 ; CHECK: load i8, {{.*}}, align 2
220 ; CHECK: load i8, {{.*}}, align 1
221 ; CHECK: load i8, {{.*}}, align 2
222 ; CHECK: load i16, {{.*}}, align 2
224 %ptr = alloca {i32, i8, i8, {i8, i16}}, align 2
225 %ptr.8 = bitcast {i32, i8, i8, {i8, i16}}* %ptr to i8*
226 call void @populate(i8* %ptr.8)
227 %val = load {i32, i8, i8, {i8, i16}}, {i32, i8, i8, {i8, i16}}* %ptr, align 2
231 declare void @populate(i8*)