1 ; This test makes sure that memmove instructions are properly eliminated. 2 ; 3 ; RUN: opt < %s -instcombine -S | FileCheck %s 4 5 @S = internal constant [33 x i8] c"panic: restorelist inconsistency\00" ; <[33 x i8]*> [#uses=1] 6 @h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=1] 7 @hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=1] 8 @hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=1] 9 10 define void @test1(i8* %A, i8* %B, i32 %N) { 11 ;; CHECK-LABEL: test1 12 ;; CHECK-NEXT: ret void 13 call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* %B, i32 0, i1 false) 14 ret void 15 } 16 17 define void @test2(i8* %A, i32 %N) { 18 ;; dest can't alias source since we can't write to source! 19 ;; CHECK-LABEL: test2 20 ;; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 1 %A, i8* align 16 getelementptr inbounds ([33 x i8], [33 x i8]* @S, i{{32|64}} 0, i{{32|64}} 0), i32 %N, i1 false) 21 ;; CHECK-NEXT: ret void 22 call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* getelementptr inbounds ([33 x i8], [33 x i8]* @S, i32 0, i32 0), i32 %N, i1 false) 23 ret void 24 } 25 26 define i32 @test3([1024 x i8]* %target) { ; arg: [1024 x i8]*> [#uses=1] 27 ;; CHECK-LABEL: test3 28 ;; CHECK-NEXT: [[P1:%[^\s]+]] = bitcast [1024 x i8]* %target to i16* 29 ;; CHECK-NEXT: store i16 104, i16* [[P1]], align 2 30 ;; CHECK-NEXT: [[P2:%[^\s]+]] = bitcast [1024 x i8]* %target to i32* 31 ;; CHECK-NEXT: store i32 7103848, i32* [[P2]], align 4 32 ;; CHECK-NEXT: [[P3:%[^\s]+]] = bitcast [1024 x i8]* %target to i64* 33 ;; CHECK-NEXT: store i64 33037504440198504, i64* [[P3]], align 8 34 ;; CHECK-NEXT: ret i32 0 35 %h_p = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 ; <i8*> [#uses=1] 36 %hel_p = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 ; <i8*> [#uses=1] 37 %hello_u_p = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0 ; <i8*> [#uses=1] 38 %target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=3] 39 call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %target_p, i8* align 2 %h_p, i32 2, i1 false) 40 call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %target_p, i8* align 4 %hel_p, i32 4, i1 false) 41 call void @llvm.memmove.p0i8.p0i8.i32(i8* align 8 %target_p, i8* align 8 %hello_u_p, i32 8, i1 false) 42 ret i32 0 43 } 44 45 ; PR2370 46 define void @test4(i8* %a) { 47 ;; CHECK-LABEL: test4 48 ;; CHECK-NEXT: ret void 49 tail call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i1 false) 50 ret void 51 } 52 53 declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1) argmemonly nounwind 54
