1 ; RUN: opt -tbaa -basicaa -newgvn -S < %s | FileCheck %s 2 3 define i32 @test1(i8* %p, i8* %q) { 4 ; CHECK-LABEL: @test1(i8* %p, i8* %q) 5 ; CHECK: call i32 @foo(i8* %p) 6 ; CHECK-NOT: tbaa 7 ; CHECK: %c = add i32 %a, %a 8 %a = call i32 @foo(i8* %p), !tbaa !0 9 %b = call i32 @foo(i8* %p) 10 %c = add i32 %a, %b 11 ret i32 %c 12 } 13 14 define i32 @test2(i8* %p, i8* %q) { 15 ; CHECK-LABEL: @test2(i8* %p, i8* %q) 16 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGC:!.*]] 17 ; CHECK: %c = add i32 %a, %a 18 %a = call i32 @foo(i8* %p), !tbaa !0 19 %b = call i32 @foo(i8* %p), !tbaa !0 20 %c = add i32 %a, %b 21 ret i32 %c 22 } 23 24 define i32 @test3(i8* %p, i8* %q) { 25 ; CHECK-LABEL: @test3(i8* %p, i8* %q) 26 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGB:!.*]] 27 ; CHECK: %c = add i32 %a, %a 28 %a = call i32 @foo(i8* %p), !tbaa !3 29 %b = call i32 @foo(i8* %p), !tbaa !3 30 %c = add i32 %a, %b 31 ret i32 %c 32 } 33 34 define i32 @test4(i8* %p, i8* %q) { 35 ; CHECK-LABEL: @test4(i8* %p, i8* %q) 36 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA:!.*]] 37 ; CHECK: %c = add i32 %a, %a 38 %a = call i32 @foo(i8* %p), !tbaa !1 39 %b = call i32 @foo(i8* %p), !tbaa !0 40 %c = add i32 %a, %b 41 ret i32 %c 42 } 43 44 define i32 @test5(i8* %p, i8* %q) { 45 ; CHECK-LABEL: @test5(i8* %p, i8* %q) 46 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA]] 47 ; CHECK: %c = add i32 %a, %a 48 %a = call i32 @foo(i8* %p), !tbaa !0 49 %b = call i32 @foo(i8* %p), !tbaa !1 50 %c = add i32 %a, %b 51 ret i32 %c 52 } 53 54 define i32 @test6(i8* %p, i8* %q) { 55 ; CHECK-LABEL: @test6(i8* %p, i8* %q) 56 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA]] 57 ; CHECK: %c = add i32 %a, %a 58 %a = call i32 @foo(i8* %p), !tbaa !0 59 %b = call i32 @foo(i8* %p), !tbaa !3 60 %c = add i32 %a, %b 61 ret i32 %c 62 } 63 64 define i32 @test7(i8* %p, i8* %q) { 65 ; CHECK-LABEL: @test7(i8* %p, i8* %q) 66 ; CHECK: call i32 @foo(i8* %p) 67 ; CHECK-NOT: tbaa 68 ; CHECK: %c = add i32 %a, %a 69 %a = call i32 @foo(i8* %p), !tbaa !4 70 %b = call i32 @foo(i8* %p), !tbaa !3 71 %c = add i32 %a, %b 72 ret i32 %c 73 } 74 75 define i32 @test8(i32* %p, i32* %q) { 76 ; CHECK-LABEL: @test8 77 ; CHECK-NEXT: store i32 15, i32* %p 78 ; CHECK-NEXT: ret i32 0 79 ; Since we know the location is invariant, we can forward the 80 ; load across the potentially aliasing store. 81 82 %a = load i32, i32* %q, !tbaa !10 83 store i32 15, i32* %p 84 %b = load i32, i32* %q, !tbaa !10 85 %c = sub i32 %a, %b 86 ret i32 %c 87 } 88 89 define i32 @test9(i32* %p, i32* %q) { 90 ; CHECK-LABEL: @test9 91 ; CHECK-NEXT: call void @clobber() 92 ; CHECK-NEXT: ret i32 0 93 ; Since we know the location is invariant, we can forward the 94 ; load across the potentially aliasing store (within the call). 95 96 %a = load i32, i32* %q, !tbaa !10 97 call void @clobber() 98 %b = load i32, i32* %q, !tbaa !10 99 %c = sub i32 %a, %b 100 ret i32 %c 101 } 102 103 define i32 @test10(i8* %p, i8* %q) { 104 ; If one access encloses the other, then the merged access is the enclosed one 105 ; and not just the common final access type. 106 ; CHECK-LABEL: @test10 107 ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAG_X_i:!.*]] 108 ; CHECK: %c = add i32 %a, %a 109 %a = call i32 @foo(i8* %p), !tbaa !15 ; TAG_X_i 110 %b = call i32 @foo(i8* %p), !tbaa !19 ; TAG_Y_x_i 111 %c = add i32 %a, %b 112 ret i32 %c 113 } 114 115 declare void @clobber() 116 declare i32 @foo(i8*) readonly 117 118 ; CHECK-DAG: [[TAGC]] = !{[[TYPEC:!.*]], [[TYPEC]], i64 0} 119 ; CHECK-DAG: [[TYPEC]] = !{!"C", [[TYPEA:!.*]]} 120 ; CHECK-DAG: [[TYPEA]] = !{!"A", !{{.*}}} 121 ; CHECK-DAG: [[TAGB]] = !{[[TYPEB:!.*]], [[TYPEB]], i64 0} 122 ; CHECK-DAG: [[TYPEB]] = !{!"B", [[TYPEA]]} 123 ; CHECK-DAG: [[TAGA]] = !{[[TYPEA]], [[TYPEA]], i64 0} 124 !0 = !{!5, !5, i64 0} 125 !1 = !{!6, !6, i64 0} 126 !2 = !{!"tbaa root"} 127 !3 = !{!7, !7, i64 0} 128 !4 = !{!11, !11, i64 0} 129 !5 = !{!"C", !6} 130 !6 = !{!"A", !2} 131 !7 = !{!"B", !6} 132 !8 = !{!"another root"} 133 !11 = !{!"scalar type", !8} 134 135 ; CHECK-DAG: [[TAG_X_i]] = !{[[TYPE_X:!.*]], [[TYPE_int:!.*]], i64 0} 136 ; CHECK-DAG: [[TYPE_X:!.*]] = !{!"struct X", [[TYPE_int]], i64 0} 137 ; CHECK-DAG: [[TYPE_int]] = !{!"int", {{!.*}}, i64 0} 138 !15 = !{!16, !17, i64 0} ; TAG_X_i 139 !16 = !{!"struct X", !17, i64 0} ; struct X { int i; }; 140 !17 = !{!"int", !18, i64 0} 141 !18 = !{!"char", !2, i64 0} 142 143 !19 = !{!20, !17, i64 0} ; TAG_Y_x_i 144 !20 = !{!"struct Y", !16, i64 0} ; struct Y { struct X x; }; 145 146 ; A TBAA structure who's only point is to have a constant location. 147 !9 = !{!"yet another root"} 148 !10 = !{!"node", !9, i64 1} 149
