| ; RUN: opt -tbaa -basicaa -gvn -S < %s | FileCheck %s |
| |
| define i32 @test1(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test1(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p) |
| ; CHECK-NOT: tbaa |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !0 |
| %b = call i32 @foo(i8* %p) |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test2(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test2(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGC:!.*]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !0 |
| %b = call i32 @foo(i8* %p), !tbaa !0 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test3(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test3(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGB:!.*]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !3 |
| %b = call i32 @foo(i8* %p), !tbaa !3 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test4(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test4(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA:!.*]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !1 |
| %b = call i32 @foo(i8* %p), !tbaa !0 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test5(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test5(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !0 |
| %b = call i32 @foo(i8* %p), !tbaa !1 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test6(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test6(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAGA]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !0 |
| %b = call i32 @foo(i8* %p), !tbaa !3 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test7(i8* %p, i8* %q) { |
| ; CHECK-LABEL: @test7(i8* %p, i8* %q) |
| ; CHECK: call i32 @foo(i8* %p) |
| ; CHECK-NOT: tbaa |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !4 |
| %b = call i32 @foo(i8* %p), !tbaa !3 |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test8(i32* %p, i32* %q) { |
| ; CHECK-LABEL: @test8 |
| ; CHECK-NEXT: store i32 15, i32* %p |
| ; CHECK-NEXT: ret i32 0 |
| ; Since we know the location is invariant, we can forward the |
| ; load across the potentially aliasing store. |
| |
| %a = load i32, i32* %q, !tbaa !10 |
| store i32 15, i32* %p |
| %b = load i32, i32* %q, !tbaa !10 |
| %c = sub i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test9(i32* %p, i32* %q) { |
| ; CHECK-LABEL: @test9 |
| ; CHECK-NEXT: call void @clobber() |
| ; CHECK-NEXT: ret i32 0 |
| ; Since we know the location is invariant, we can forward the |
| ; load across the potentially aliasing store (within the call). |
| |
| %a = load i32, i32* %q, !tbaa !10 |
| call void @clobber() |
| %b = load i32, i32* %q, !tbaa !10 |
| %c = sub i32 %a, %b |
| ret i32 %c |
| } |
| |
| define i32 @test10(i8* %p, i8* %q) { |
| ; If one access encloses the other, then the merged access is the enclosed one |
| ; and not just the common final access type. |
| ; CHECK-LABEL: @test10 |
| ; CHECK: call i32 @foo(i8* %p), !tbaa [[TAG_X_i:!.*]] |
| ; CHECK: %c = add i32 %a, %a |
| %a = call i32 @foo(i8* %p), !tbaa !15 ; TAG_X_i |
| %b = call i32 @foo(i8* %p), !tbaa !19 ; TAG_Y_x_i |
| %c = add i32 %a, %b |
| ret i32 %c |
| } |
| |
| declare void @clobber() |
| declare i32 @foo(i8*) readonly |
| |
| ; CHECK-DAG: [[TAGC]] = !{[[TYPEC:!.*]], [[TYPEC]], i64 0} |
| ; CHECK-DAG: [[TYPEC]] = !{!"C", [[TYPEA:!.*]]} |
| ; CHECK-DAG: [[TYPEA]] = !{!"A", !{{.*}}} |
| ; CHECK-DAG: [[TAGB]] = !{[[TYPEB:!.*]], [[TYPEB]], i64 0} |
| ; CHECK-DAG: [[TYPEB]] = !{!"B", [[TYPEA]]} |
| ; CHECK-DAG: [[TAGA]] = !{[[TYPEA]], [[TYPEA]], i64 0} |
| !0 = !{!5, !5, i64 0} |
| !1 = !{!6, !6, i64 0} |
| !2 = !{!"tbaa root"} |
| !3 = !{!7, !7, i64 0} |
| !4 = !{!11, !11, i64 0} |
| !5 = !{!"C", !6} |
| !6 = !{!"A", !2} |
| !7 = !{!"B", !6} |
| !8 = !{!"another root"} |
| !11 = !{!"scalar type", !8} |
| |
| ; CHECK-DAG: [[TAG_X_i]] = !{[[TYPE_X:!.*]], [[TYPE_int:!.*]], i64 0} |
| ; CHECK-DAG: [[TYPE_X:!.*]] = !{!"struct X", [[TYPE_int]], i64 0} |
| ; CHECK-DAG: [[TYPE_int]] = !{!"int", {{!.*}}, i64 0} |
| !15 = !{!16, !17, i64 0} ; TAG_X_i |
| !16 = !{!"struct X", !17, i64 0} ; struct X { int i; }; |
| !17 = !{!"int", !18, i64 0} |
| !18 = !{!"char", !2, i64 0} |
| |
| !19 = !{!20, !17, i64 0} ; TAG_Y_x_i |
| !20 = !{!"struct Y", !16, i64 0} ; struct Y { struct X x; }; |
| |
| ; A TBAA structure who's only point is to have a constant location. |
| !9 = !{!"yet another root"} |
| !10 = !{!"node", !9, i64 1} |