1 ; RUN: opt < %s -basicaa -tbaa -licm -S | FileCheck %s
2 ; RUN: opt -aa-pipeline=type-based-aa,basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' -S %s | FileCheck %s
3 target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
5 @X = global i32 7 ; <i32*> [#uses=4]
7 define void @test1(i32 %i) {
10 ; CHECK-LABEL: @test1(
12 ; CHECK-NEXT: load i32, i32* @X
13 ; CHECK-NEXT: br label %Loop
16 Loop: ; preds = %Loop, %0
17 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
18 %x = load i32, i32* @X ; <i32> [#uses=1]
19 %x2 = add i32 %x, 1 ; <i32> [#uses=1]
20 store i32 %x2, i32* @X
21 %Next = add i32 %j, 1 ; <i32> [#uses=2]
22 %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
23 br i1 %cond, label %Out, label %Loop
28 ; CHECK-NEXT: %[[LCSSAPHI:.*]] = phi i32 [ %x2
29 ; CHECK-NEXT: store i32 %[[LCSSAPHI]], i32* @X
30 ; CHECK-NEXT: ret void
34 define void @test2(i32 %i) {
37 ; CHECK-LABEL: @test2(
39 ; CHECK-NEXT: %.promoted = load i32, i32* getelementptr inbounds (i32, i32* @X, i64 1)
40 ; CHECK-NEXT: br label %Loop
42 Loop: ; preds = %Loop, %0
43 %X1 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
44 %A = load i32, i32* %X1 ; <i32> [#uses=1]
45 %V = add i32 %A, 1 ; <i32> [#uses=1]
46 %X2 = getelementptr i32, i32* @X, i64 1 ; <i32*> [#uses=1]
47 store i32 %V, i32* %X2
48 br i1 false, label %Loop, label %Exit
53 ; CHECK-NEXT: %[[LCSSAPHI:.*]] = phi i32 [ %V
54 ; CHECK-NEXT: store i32 %[[LCSSAPHI]], i32* getelementptr inbounds (i32, i32* @X, i64 1)
55 ; CHECK-NEXT: ret void
60 define void @test3(i32 %i) {
61 ; CHECK-LABEL: @test3(
64 ; Should not promote this to a register
65 %x = load volatile i32, i32* @X
67 store i32 %x2, i32* @X
68 br i1 true, label %Out, label %Loop
71 ; CHECK-NEXT: load volatile
78 define void @test4(i8* %x, i8 %n) {
79 ; CHECK-LABEL: @test4(
82 store i8* %x, i8** %handle1
86 %tmp = getelementptr i8, i8* %x, i64 8
87 store i8* %tmp, i8** %handle2
91 %count = phi i8 [ 0, %loop ], [ %nextcount, %subloop ]
92 %offsetx2 = load i8*, i8** %handle2
93 store i8 %n, i8* %offsetx2
94 %newoffsetx2 = getelementptr i8, i8* %offsetx2, i64 -1
95 store i8* %newoffsetx2, i8** %handle2
96 %nextcount = add i8 %count, 1
97 %innerexitcond = icmp sge i8 %nextcount, 8
98 br i1 %innerexitcond, label %innerexit, label %subloop
100 ; Should have promoted 'handle2' accesses.
102 ; CHECK-NEXT: phi i8* [
103 ; CHECK-NEXT: %count = phi i8 [
104 ; CHECK-NEXT: store i8 %n
109 %offsetx1 = load i8*, i8** %handle1
110 %val = load i8, i8* %offsetx1
111 %cond = icmp eq i8 %val, %n
112 br i1 %cond, label %exit, label %loop
114 ; Should not have promoted offsetx1 loads.
116 ; CHECK: %val = load i8, i8* %offsetx1
117 ; CHECK: %cond = icmp eq i8 %val, %n
118 ; CHECK: br i1 %cond, label %exit, label %loop
124 define void @test5(i32 %i, i32** noalias %P2) {
127 ; CHECK-LABEL: @test5(
129 ; CHECK-NEXT: load i32, i32* @X
130 ; CHECK-NEXT: br label %Loop
133 Loop: ; preds = %Loop, %0
134 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
135 %x = load i32, i32* @X ; <i32> [#uses=1]
136 %x2 = add i32 %x, 1 ; <i32> [#uses=1]
137 store i32 %x2, i32* @X
139 store atomic i32* @X, i32** %P2 monotonic, align 8
141 %Next = add i32 %j, 1 ; <i32> [#uses=2]
142 %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
143 br i1 %cond, label %Out, label %Loop
148 ; CHECK-NEXT: %[[LCSSAPHI:.*]] = phi i32 [ %x2
149 ; CHECK-NEXT: store i32 %[[LCSSAPHI]], i32* @X
150 ; CHECK-NEXT: ret void
155 ; PR14753 - Preserve TBAA tags when promoting values in a loop.
156 define void @test6(i32 %n, float* nocapture %a, i32* %gi) {
158 store i32 0, i32* %gi, align 4, !tbaa !0
159 %cmp1 = icmp slt i32 0, %n
160 br i1 %cmp1, label %for.body.lr.ph, label %for.end
162 for.body.lr.ph: ; preds = %entry
165 for.body: ; preds = %for.body.lr.ph, %for.body
166 %storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
167 %idxprom = sext i32 %storemerge2 to i64
168 %arrayidx = getelementptr inbounds float, float* %a, i64 %idxprom
169 store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3
170 %0 = load i32, i32* %gi, align 4, !tbaa !0
171 %inc = add nsw i32 %0, 1
172 store i32 %inc, i32* %gi, align 4, !tbaa !0
173 %cmp = icmp slt i32 %inc, %n
174 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
176 for.cond.for.end_crit_edge: ; preds = %for.body
179 for.end: ; preds = %for.cond.for.end_crit_edge, %entry
182 ; CHECK: for.body.lr.ph:
183 ; CHECK-NEXT: %gi.promoted = load i32, i32* %gi, align 4, !tbaa !0
184 ; CHECK: for.cond.for.end_crit_edge:
185 ; CHECK-NEXT: %[[LCSSAPHI:.*]] = phi i32 [ %inc
186 ; CHECK-NEXT: store i32 %[[LCSSAPHI]], i32* %gi, align 4, !tbaa !0
189 !0 = !{!4, !4, i64 0}
190 !1 = !{!"omnipotent char", !2}
191 !2 = !{!"Simple C/C++ TBAA"}
192 !3 = !{!5, !5, i64 0}