xref: /aosp_15_r20/external/llvm/test/Transforms/SROA/alignment.ll (revision 9880d6810fe72a1726cb53787c6711e909410d58)
1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -sroa -S | FileCheck %s
2*9880d681SAndroid Build Coastguard Workertarget 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"
3*9880d681SAndroid Build Coastguard Worker
4*9880d681SAndroid Build Coastguard Workerdeclare void @llvm.memcpy.p0i8.p0i8.i32(i8*, i8*, i32, i32, i1)
5*9880d681SAndroid Build Coastguard Worker
6*9880d681SAndroid Build Coastguard Workerdefine void @test1({ i8, i8 }* %a, { i8, i8 }* %b) {
7*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test1(
8*9880d681SAndroid Build Coastguard Worker; CHECK: %[[gep_a0:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %a, i64 0, i32 0
9*9880d681SAndroid Build Coastguard Worker; CHECK: %[[a0:.*]] = load i8, i8* %[[gep_a0]], align 16
10*9880d681SAndroid Build Coastguard Worker; CHECK: %[[gep_a1:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %a, i64 0, i32 1
11*9880d681SAndroid Build Coastguard Worker; CHECK: %[[a1:.*]] = load i8, i8* %[[gep_a1]], align 1
12*9880d681SAndroid Build Coastguard Worker; CHECK: %[[gep_b0:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %b, i64 0, i32 0
13*9880d681SAndroid Build Coastguard Worker; CHECK: store i8 %[[a0]], i8* %[[gep_b0]], align 16
14*9880d681SAndroid Build Coastguard Worker; CHECK: %[[gep_b1:.*]] = getelementptr inbounds { i8, i8 }, { i8, i8 }* %b, i64 0, i32 1
15*9880d681SAndroid Build Coastguard Worker; CHECK: store i8 %[[a1]], i8* %[[gep_b1]], align 1
16*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
17*9880d681SAndroid Build Coastguard Worker
18*9880d681SAndroid Build Coastguard Workerentry:
19*9880d681SAndroid Build Coastguard Worker  %alloca = alloca { i8, i8 }, align 16
20*9880d681SAndroid Build Coastguard Worker  %gep_a = getelementptr { i8, i8 }, { i8, i8 }* %a, i32 0, i32 0
21*9880d681SAndroid Build Coastguard Worker  %gep_alloca = getelementptr { i8, i8 }, { i8, i8 }* %alloca, i32 0, i32 0
22*9880d681SAndroid Build Coastguard Worker  %gep_b = getelementptr { i8, i8 }, { i8, i8 }* %b, i32 0, i32 0
23*9880d681SAndroid Build Coastguard Worker
24*9880d681SAndroid Build Coastguard Worker  store i8 420, i8* %gep_alloca, align 16
25*9880d681SAndroid Build Coastguard Worker
26*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %gep_alloca, i8* %gep_a, i32 2, i32 16, i1 false)
27*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %gep_b, i8* %gep_alloca, i32 2, i32 16, i1 false)
28*9880d681SAndroid Build Coastguard Worker  ret void
29*9880d681SAndroid Build Coastguard Worker}
30*9880d681SAndroid Build Coastguard Worker
31*9880d681SAndroid Build Coastguard Workerdefine void @test2() {
32*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test2(
33*9880d681SAndroid Build Coastguard Worker; CHECK: alloca i16
34*9880d681SAndroid Build Coastguard Worker; CHECK: load i8, i8* %{{.*}}
35*9880d681SAndroid Build Coastguard Worker; CHECK: store i8 42, i8* %{{.*}}
36*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
37*9880d681SAndroid Build Coastguard Worker
38*9880d681SAndroid Build Coastguard Workerentry:
39*9880d681SAndroid Build Coastguard Worker  %a = alloca { i8, i8, i8, i8 }, align 2
40*9880d681SAndroid Build Coastguard Worker  %gep1 = getelementptr { i8, i8, i8, i8 }, { i8, i8, i8, i8 }* %a, i32 0, i32 1
41*9880d681SAndroid Build Coastguard Worker  %cast1 = bitcast i8* %gep1 to i16*
42*9880d681SAndroid Build Coastguard Worker  store volatile i16 0, i16* %cast1
43*9880d681SAndroid Build Coastguard Worker  %gep2 = getelementptr { i8, i8, i8, i8 }, { i8, i8, i8, i8 }* %a, i32 0, i32 2
44*9880d681SAndroid Build Coastguard Worker  %result = load i8, i8* %gep2
45*9880d681SAndroid Build Coastguard Worker  store i8 42, i8* %gep2
46*9880d681SAndroid Build Coastguard Worker  ret void
47*9880d681SAndroid Build Coastguard Worker}
48*9880d681SAndroid Build Coastguard Worker
49*9880d681SAndroid Build Coastguard Workerdefine void @PR13920(<2 x i64>* %a, i16* %b) {
50*9880d681SAndroid Build Coastguard Worker; Test that alignments on memcpy intrinsics get propagated to loads and stores.
51*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @PR13920(
52*9880d681SAndroid Build Coastguard Worker; CHECK: load <2 x i64>, <2 x i64>* %a, align 2
53*9880d681SAndroid Build Coastguard Worker; CHECK: store <2 x i64> {{.*}}, <2 x i64>* {{.*}}, align 2
54*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
55*9880d681SAndroid Build Coastguard Worker
56*9880d681SAndroid Build Coastguard Workerentry:
57*9880d681SAndroid Build Coastguard Worker  %aa = alloca <2 x i64>, align 16
58*9880d681SAndroid Build Coastguard Worker  %aptr = bitcast <2 x i64>* %a to i8*
59*9880d681SAndroid Build Coastguard Worker  %aaptr = bitcast <2 x i64>* %aa to i8*
60*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %aaptr, i8* %aptr, i32 16, i32 2, i1 false)
61*9880d681SAndroid Build Coastguard Worker  %bptr = bitcast i16* %b to i8*
62*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %bptr, i8* %aaptr, i32 16, i32 2, i1 false)
63*9880d681SAndroid Build Coastguard Worker  ret void
64*9880d681SAndroid Build Coastguard Worker}
65*9880d681SAndroid Build Coastguard Worker
66*9880d681SAndroid Build Coastguard Workerdefine void @test3(i8* %x) {
67*9880d681SAndroid Build Coastguard Worker; Test that when we promote an alloca to a type with lower ABI alignment, we
68*9880d681SAndroid Build Coastguard Worker; provide the needed explicit alignment that code using the alloca may be
69*9880d681SAndroid Build Coastguard Worker; expecting. However, also check that any offset within an alloca can in turn
70*9880d681SAndroid Build Coastguard Worker; reduce the alignment.
71*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test3(
72*9880d681SAndroid Build Coastguard Worker; CHECK: alloca [22 x i8], align 8
73*9880d681SAndroid Build Coastguard Worker; CHECK: alloca [18 x i8], align 2
74*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
75*9880d681SAndroid Build Coastguard Worker
76*9880d681SAndroid Build Coastguard Workerentry:
77*9880d681SAndroid Build Coastguard Worker  %a = alloca { i8*, i8*, i8* }
78*9880d681SAndroid Build Coastguard Worker  %b = alloca { i8*, i8*, i8* }
79*9880d681SAndroid Build Coastguard Worker  %a_raw = bitcast { i8*, i8*, i8* }* %a to i8*
80*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %a_raw, i8* %x, i32 22, i32 8, i1 false)
81*9880d681SAndroid Build Coastguard Worker  %b_raw = bitcast { i8*, i8*, i8* }* %b to i8*
82*9880d681SAndroid Build Coastguard Worker  %b_gep = getelementptr i8, i8* %b_raw, i32 6
83*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %b_gep, i8* %x, i32 18, i32 2, i1 false)
84*9880d681SAndroid Build Coastguard Worker  ret void
85*9880d681SAndroid Build Coastguard Worker}
86*9880d681SAndroid Build Coastguard Worker
87*9880d681SAndroid Build Coastguard Workerdefine void @test5() {
88*9880d681SAndroid Build Coastguard Worker; Test that we preserve underaligned loads and stores when splitting. The use
89*9880d681SAndroid Build Coastguard Worker; of volatile in this test case is just to force the loads and stores to not be
90*9880d681SAndroid Build Coastguard Worker; split or promoted out of existence.
91*9880d681SAndroid Build Coastguard Worker;
92*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test5(
93*9880d681SAndroid Build Coastguard Worker; CHECK: alloca [9 x i8]
94*9880d681SAndroid Build Coastguard Worker; CHECK: alloca [9 x i8]
95*9880d681SAndroid Build Coastguard Worker; CHECK: store volatile double 0.0{{.*}}, double* %{{.*}}, align 1
96*9880d681SAndroid Build Coastguard Worker; CHECK: load volatile i16, i16* %{{.*}}, align 1
97*9880d681SAndroid Build Coastguard Worker; CHECK: load double, double* %{{.*}}, align 1
98*9880d681SAndroid Build Coastguard Worker; CHECK: store volatile double %{{.*}}, double* %{{.*}}, align 1
99*9880d681SAndroid Build Coastguard Worker; CHECK: load volatile i16, i16* %{{.*}}, align 1
100*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
101*9880d681SAndroid Build Coastguard Worker
102*9880d681SAndroid Build Coastguard Workerentry:
103*9880d681SAndroid Build Coastguard Worker  %a = alloca [18 x i8]
104*9880d681SAndroid Build Coastguard Worker  %raw1 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 0
105*9880d681SAndroid Build Coastguard Worker  %ptr1 = bitcast i8* %raw1 to double*
106*9880d681SAndroid Build Coastguard Worker  store volatile double 0.0, double* %ptr1, align 1
107*9880d681SAndroid Build Coastguard Worker  %weird_gep1 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 7
108*9880d681SAndroid Build Coastguard Worker  %weird_cast1 = bitcast i8* %weird_gep1 to i16*
109*9880d681SAndroid Build Coastguard Worker  %weird_load1 = load volatile i16, i16* %weird_cast1, align 1
110*9880d681SAndroid Build Coastguard Worker
111*9880d681SAndroid Build Coastguard Worker  %raw2 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 9
112*9880d681SAndroid Build Coastguard Worker  %ptr2 = bitcast i8* %raw2 to double*
113*9880d681SAndroid Build Coastguard Worker  %d1 = load double, double* %ptr1, align 1
114*9880d681SAndroid Build Coastguard Worker  store volatile double %d1, double* %ptr2, align 1
115*9880d681SAndroid Build Coastguard Worker  %weird_gep2 = getelementptr inbounds [18 x i8], [18 x i8]* %a, i32 0, i32 16
116*9880d681SAndroid Build Coastguard Worker  %weird_cast2 = bitcast i8* %weird_gep2 to i16*
117*9880d681SAndroid Build Coastguard Worker  %weird_load2 = load volatile i16, i16* %weird_cast2, align 1
118*9880d681SAndroid Build Coastguard Worker
119*9880d681SAndroid Build Coastguard Worker  ret void
120*9880d681SAndroid Build Coastguard Worker}
121*9880d681SAndroid Build Coastguard Worker
122*9880d681SAndroid Build Coastguard Workerdefine void @test6() {
123*9880d681SAndroid Build Coastguard Worker; Test that we promote alignment when the underlying alloca switches to one
124*9880d681SAndroid Build Coastguard Worker; that innately provides it.
125*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test6(
126*9880d681SAndroid Build Coastguard Worker; CHECK: alloca double
127*9880d681SAndroid Build Coastguard Worker; CHECK: alloca double
128*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: align
129*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
130*9880d681SAndroid Build Coastguard Worker
131*9880d681SAndroid Build Coastguard Workerentry:
132*9880d681SAndroid Build Coastguard Worker  %a = alloca [16 x i8]
133*9880d681SAndroid Build Coastguard Worker  %raw1 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 0
134*9880d681SAndroid Build Coastguard Worker  %ptr1 = bitcast i8* %raw1 to double*
135*9880d681SAndroid Build Coastguard Worker  store volatile double 0.0, double* %ptr1, align 1
136*9880d681SAndroid Build Coastguard Worker
137*9880d681SAndroid Build Coastguard Worker  %raw2 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 8
138*9880d681SAndroid Build Coastguard Worker  %ptr2 = bitcast i8* %raw2 to double*
139*9880d681SAndroid Build Coastguard Worker  %val = load double, double* %ptr1, align 1
140*9880d681SAndroid Build Coastguard Worker  store volatile double %val, double* %ptr2, align 1
141*9880d681SAndroid Build Coastguard Worker
142*9880d681SAndroid Build Coastguard Worker  ret void
143*9880d681SAndroid Build Coastguard Worker}
144*9880d681SAndroid Build Coastguard Worker
145*9880d681SAndroid Build Coastguard Workerdefine void @test7(i8* %out) {
146*9880d681SAndroid Build Coastguard Worker; Test that we properly compute the destination alignment when rewriting
147*9880d681SAndroid Build Coastguard Worker; memcpys as direct loads or stores.
148*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test7(
149*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: alloca
150*9880d681SAndroid Build Coastguard Worker
151*9880d681SAndroid Build Coastguard Workerentry:
152*9880d681SAndroid Build Coastguard Worker  %a = alloca [16 x i8]
153*9880d681SAndroid Build Coastguard Worker  %raw1 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 0
154*9880d681SAndroid Build Coastguard Worker  %ptr1 = bitcast i8* %raw1 to double*
155*9880d681SAndroid Build Coastguard Worker  %raw2 = getelementptr inbounds [16 x i8], [16 x i8]* %a, i32 0, i32 8
156*9880d681SAndroid Build Coastguard Worker  %ptr2 = bitcast i8* %raw2 to double*
157*9880d681SAndroid Build Coastguard Worker
158*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %raw1, i8* %out, i32 16, i32 0, i1 false)
159*9880d681SAndroid Build Coastguard Worker; CHECK: %[[val2:.*]] = load double, double* %{{.*}}, align 1
160*9880d681SAndroid Build Coastguard Worker; CHECK: %[[val1:.*]] = load double, double* %{{.*}}, align 1
161*9880d681SAndroid Build Coastguard Worker
162*9880d681SAndroid Build Coastguard Worker  %val1 = load double, double* %ptr2, align 1
163*9880d681SAndroid Build Coastguard Worker  %val2 = load double, double* %ptr1, align 1
164*9880d681SAndroid Build Coastguard Worker
165*9880d681SAndroid Build Coastguard Worker  store double %val1, double* %ptr1, align 1
166*9880d681SAndroid Build Coastguard Worker  store double %val2, double* %ptr2, align 1
167*9880d681SAndroid Build Coastguard Worker
168*9880d681SAndroid Build Coastguard Worker  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %out, i8* %raw1, i32 16, i32 0, i1 false)
169*9880d681SAndroid Build Coastguard Worker; CHECK: store double %[[val1]], double* %{{.*}}, align 1
170*9880d681SAndroid Build Coastguard Worker; CHECK: store double %[[val2]], double* %{{.*}}, align 1
171*9880d681SAndroid Build Coastguard Worker
172*9880d681SAndroid Build Coastguard Worker  ret void
173*9880d681SAndroid Build Coastguard Worker; CHECK: ret void
174*9880d681SAndroid Build Coastguard Worker}
175