1 ; RUN: opt < %s -basicaa -tbaa -licm -S | FileCheck %s
2 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"
4 @X = global i32 7 ; <i32*> [#uses=4]
6 define void @test1(i32 %i) {
11 ; CHECK-NEXT: load i32* @X
12 ; CHECK-NEXT: br label %Loop
15 Loop: ; preds = %Loop, %0
16 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
17 %x = load i32* @X ; <i32> [#uses=1]
18 %x2 = add i32 %x, 1 ; <i32> [#uses=1]
19 store i32 %x2, i32* @X
20 %Next = add i32 %j, 1 ; <i32> [#uses=2]
21 %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
22 br i1 %cond, label %Out, label %Loop
27 ; CHECK-NEXT: store i32 %x2, i32* @X
28 ; CHECK-NEXT: ret void
32 define void @test2(i32 %i) {
35 ; CHECK-LABEL: @test2(
37 ; CHECK-NEXT: %.promoted = load i32* getelementptr inbounds (i32* @X, i64 1)
38 ; CHECK-NEXT: br label %Loop
40 Loop: ; preds = %Loop, %0
41 %X1 = getelementptr i32* @X, i64 1 ; <i32*> [#uses=1]
42 %A = load i32* %X1 ; <i32> [#uses=1]
43 %V = add i32 %A, 1 ; <i32> [#uses=1]
44 %X2 = getelementptr i32* @X, i64 1 ; <i32*> [#uses=1]
45 store i32 %V, i32* %X2
46 br i1 false, label %Loop, label %Exit
51 ; CHECK-NEXT: store i32 %V, i32* getelementptr inbounds (i32* @X, i64 1)
52 ; CHECK-NEXT: ret void
57 define void @test3(i32 %i) {
58 ; CHECK-LABEL: @test3(
61 ; Should not promote this to a register
62 %x = load volatile i32* @X
64 store i32 %x2, i32* @X
65 br i1 true, label %Out, label %Loop
68 ; CHECK-NEXT: load volatile
75 define void @test4(i8* %x, i8 %n) {
76 ; CHECK-LABEL: @test4(
79 store i8* %x, i8** %handle1
83 %tmp = getelementptr i8* %x, i64 8
84 store i8* %tmp, i8** %handle2
88 %count = phi i8 [ 0, %loop ], [ %nextcount, %subloop ]
89 %offsetx2 = load i8** %handle2
90 store i8 %n, i8* %offsetx2
91 %newoffsetx2 = getelementptr i8* %offsetx2, i64 -1
92 store i8* %newoffsetx2, i8** %handle2
93 %nextcount = add i8 %count, 1
94 %innerexitcond = icmp sge i8 %nextcount, 8
95 br i1 %innerexitcond, label %innerexit, label %subloop
97 ; Should have promoted 'handle2' accesses.
99 ; CHECK-NEXT: phi i8* [
100 ; CHECK-NEXT: %count = phi i8 [
101 ; CHECK-NEXT: store i8 %n
106 %offsetx1 = load i8** %handle1
107 %val = load i8* %offsetx1
108 %cond = icmp eq i8 %val, %n
109 br i1 %cond, label %exit, label %loop
111 ; Should not have promoted offsetx1 loads.
113 ; CHECK: %val = load i8* %offsetx1
114 ; CHECK: %cond = icmp eq i8 %val, %n
115 ; CHECK: br i1 %cond, label %exit, label %loop
121 define void @test5(i32 %i, i32** noalias %P2) {
124 ; CHECK-LABEL: @test5(
126 ; CHECK-NEXT: load i32* @X
127 ; CHECK-NEXT: br label %Loop
130 Loop: ; preds = %Loop, %0
131 %j = phi i32 [ 0, %Entry ], [ %Next, %Loop ] ; <i32> [#uses=1]
132 %x = load i32* @X ; <i32> [#uses=1]
133 %x2 = add i32 %x, 1 ; <i32> [#uses=1]
134 store i32 %x2, i32* @X
136 store volatile i32* @X, i32** %P2
138 %Next = add i32 %j, 1 ; <i32> [#uses=2]
139 %cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
140 br i1 %cond, label %Out, label %Loop
145 ; CHECK-NEXT: store i32 %x2, i32* @X
146 ; CHECK-NEXT: ret void
151 ; PR14753 - Preserve TBAA tags when promoting values in a loop.
152 define void @test6(i32 %n, float* nocapture %a, i32* %gi) {
154 store i32 0, i32* %gi, align 4, !tbaa !0
155 %cmp1 = icmp slt i32 0, %n
156 br i1 %cmp1, label %for.body.lr.ph, label %for.end
158 for.body.lr.ph: ; preds = %entry
161 for.body: ; preds = %for.body.lr.ph, %for.body
162 %storemerge2 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
163 %idxprom = sext i32 %storemerge2 to i64
164 %arrayidx = getelementptr inbounds float* %a, i64 %idxprom
165 store float 0.000000e+00, float* %arrayidx, align 4, !tbaa !3
166 %0 = load i32* %gi, align 4, !tbaa !0
167 %inc = add nsw i32 %0, 1
168 store i32 %inc, i32* %gi, align 4, !tbaa !0
169 %cmp = icmp slt i32 %inc, %n
170 br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
172 for.cond.for.end_crit_edge: ; preds = %for.body
175 for.end: ; preds = %for.cond.for.end_crit_edge, %entry
178 ; CHECK: for.body.lr.ph:
179 ; CHECK-NEXT: %gi.promoted = load i32* %gi, align 4, !tbaa !0
180 ; CHECK: for.cond.for.end_crit_edge:
181 ; CHECK-NEXT: store i32 %inc, i32* %gi, align 4, !tbaa !0
184 !0 = metadata !{metadata !4, metadata !4, i64 0}
185 !1 = metadata !{metadata !"omnipotent char", metadata !2}
186 !2 = metadata !{metadata !"Simple C/C++ TBAA"}
187 !3 = metadata !{metadata !5, metadata !5, i64 0}
188 !4 = metadata !{metadata !"int", metadata !1}
189 !5 = metadata !{metadata !"float", metadata !1}