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1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py2; This test makes sure that memmove instructions are properly eliminated.3;4; RUN: opt < %s -passes=instcombine -S | FileCheck %s5 6@S = internal constant [33 x i8] c"panic: restorelist inconsistency\00" ; <ptr> [#uses=1]7@h = constant [2 x i8] c"h\00" ; <ptr> [#uses=1]8@hel = constant [4 x i8] c"hel\00" ; <ptr> [#uses=1]9@hello_u = constant [8 x i8] c"hello_u\00" ; <ptr> [#uses=1]10 11define void @test1(ptr %A, ptr %B, i32 %N) {12; CHECK-LABEL: @test1(13; CHECK-NEXT: ret void14;15 call void @llvm.memmove.p0.p0.i32(ptr %A, ptr %B, i32 0, i1 false)16 ret void17}18 19define void @test2(ptr %A, i32 %N) {20 ;; dest can't alias source since we can't write to source!21; CHECK-LABEL: @test2(22; CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[A:%.*]], ptr nonnull align 16 @S, i32 [[N:%.*]], i1 false)23; CHECK-NEXT: ret void24;25 call void @llvm.memmove.p0.p0.i32(ptr %A, ptr @S, i32 %N, i1 false)26 ret void27}28 29define i32 @test3(ptr %target) { ; arg: ptr> [#uses=1]30; CHECK-LABEL: @test3(31; CHECK-NEXT: store i16 104, ptr [[TARGET:%.*]], align 232; CHECK-NEXT: store i32 7103848, ptr [[TARGET]], align 433; CHECK-NEXT: store i64 33037504440198504, ptr [[TARGET]], align 834; CHECK-NEXT: ret i32 035;36 %h_p = getelementptr [2 x i8], ptr @h, i32 0, i32 0 ; <ptr> [#uses=1]37 %hel_p = getelementptr [4 x i8], ptr @hel, i32 0, i32 0 ; <ptr> [#uses=1]38 %hello_u_p = getelementptr [8 x i8], ptr @hello_u, i32 0, i32 0 ; <ptr> [#uses=1]39 %target_p = getelementptr [1024 x i8], ptr %target, i32 0, i32 0 ; <ptr> [#uses=3]40 call void @llvm.memmove.p0.p0.i32(ptr align 2 %target_p, ptr align 2 %h_p, i32 2, i1 false)41 call void @llvm.memmove.p0.p0.i32(ptr align 4 %target_p, ptr align 4 %hel_p, i32 4, i1 false)42 call void @llvm.memmove.p0.p0.i32(ptr align 8 %target_p, ptr align 8 %hello_u_p, i32 8, i1 false)43 ret i32 044}45 46; PR237047define void @test4(ptr %a) {48; CHECK-LABEL: @test4(49; CHECK-NEXT: ret void50;51 tail call void @llvm.memmove.p0.p0.i32(ptr %a, ptr %a, i32 100, i1 false)52 ret void53}54 55@UnknownConstant = external constant i12856 57define void @memmove_to_constant(ptr %src) {58; CHECK-LABEL: @memmove_to_constant(59; CHECK-NEXT: ret void60;61 call void @llvm.memmove.p0.p0.i32(ptr @UnknownConstant, ptr %src, i32 16, i1 false)62 ret void63}64 65 66declare void @llvm.memmove.p0.p0.i32(ptr nocapture, ptr nocapture readonly, i32, i1) argmemonly nounwind67