2019-04-17 12:52:47 +08:00
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; This test makes sure that memmove instructions are properly eliminated.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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@S = internal constant [33 x i8] c"panic: restorelist inconsistency\00" ; <[33 x i8]*> [#uses=1]
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@h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=1]
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@hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=1]
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@hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=1]
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define void @test1(i8* %A, i8* %B, i32 %N) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: ret void
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;
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* %B, i32 0, i1 false)
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ret void
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}
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define void @test2(i8* %A, i32 %N) {
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;; dest can't alias source since we can't write to source!
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; CHECK-LABEL: @test2(
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2019-08-14 01:18:46 +08:00
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; CHECK-NEXT: call void @llvm.memcpy.p0i8.p0i8.i32(i8* noalias align 1 [[A:%.*]], i8* noalias align 16 getelementptr inbounds ([33 x i8], [33 x i8]* @S, i64 0, i64 0), i32 [[N:%.*]], i1 false)
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2019-04-17 12:52:47 +08:00
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; CHECK-NEXT: ret void
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;
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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)
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ret void
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}
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define i32 @test3([1024 x i8]* %target) { ; arg: [1024 x i8]*> [#uses=1]
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast [1024 x i8]* [[TARGET:%.*]] to i16*
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; CHECK-NEXT: store i16 104, i16* [[TMP1]], align 2
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast [1024 x i8]* [[TARGET]] to i32*
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; CHECK-NEXT: store i32 7103848, i32* [[TMP2]], align 4
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; CHECK-NEXT: [[TMP3:%.*]] = bitcast [1024 x i8]* [[TARGET]] to i64*
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; CHECK-NEXT: store i64 33037504440198504, i64* [[TMP3]], align 8
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; CHECK-NEXT: ret i32 0
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;
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%h_p = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 ; <i8*> [#uses=1]
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%hel_p = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 ; <i8*> [#uses=1]
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%hello_u_p = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0 ; <i8*> [#uses=1]
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%target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=3]
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call void @llvm.memmove.p0i8.p0i8.i32(i8* align 2 %target_p, i8* align 2 %h_p, i32 2, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* align 4 %target_p, i8* align 4 %hel_p, i32 4, i1 false)
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call void @llvm.memmove.p0i8.p0i8.i32(i8* align 8 %target_p, i8* align 8 %hello_u_p, i32 8, i1 false)
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ret i32 0
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}
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; PR2370
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define void @test4(i8* %a) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: ret void
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;
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tail call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i1 false)
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ret void
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}
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@UnknownConstant = external constant i128
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define void @memmove_to_constant(i8* %src) {
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; CHECK-LABEL: @memmove_to_constant(
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; CHECK-NEXT: ret void
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;
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%dest = bitcast i128* @UnknownConstant to i8*
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call void @llvm.memmove.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 16, i1 false)
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ret void
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}
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declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i1) argmemonly nounwind
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