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annotate test/Transforms/InstCombine/memmove.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 95c75e76d11b
children 803732b1fca8
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95c75e76d11b LLVM 3.4
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1 ; This test makes sure that memmove instructions are properly eliminated.
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2 ;
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3 ; RUN: opt < %s -instcombine -S | not grep "call void @llvm.memmove"
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4
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5 @S = internal constant [33 x i8] c"panic: restorelist inconsistency\00" ; <[33 x i8]*> [#uses=1]
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6 @h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=1]
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7 @hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=1]
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8 @hello_u = constant [8 x i8] c"hello_u\00" ; <[8 x i8]*> [#uses=1]
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9
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10 define void @test1(i8* %A, i8* %B, i32 %N) {
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11 call void @llvm.memmove.p0i8.p0i8.i32(i8* %A, i8* %B, i32 0, i32 1, i1 false)
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12 ret void
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13 }
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15 define void @test2(i8* %A, i32 %N) {
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16 ;; dest can't alias source since we can't write to source!
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17 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, i32 1, i1 false)
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18 ret void
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19 }
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21 define i32 @test3() {
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22 %h_p = getelementptr [2 x i8], [2 x i8]* @h, i32 0, i32 0 ; <i8*> [#uses=1]
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23 %hel_p = getelementptr [4 x i8], [4 x i8]* @hel, i32 0, i32 0 ; <i8*> [#uses=1]
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24 %hello_u_p = getelementptr [8 x i8], [8 x i8]* @hello_u, i32 0, i32 0 ; <i8*> [#uses=1]
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25 %target = alloca [1024 x i8] ; <[1024 x i8]*> [#uses=1]
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26 %target_p = getelementptr [1024 x i8], [1024 x i8]* %target, i32 0, i32 0 ; <i8*> [#uses=3]
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27 call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %h_p, i32 2, i32 2, i1 false)
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28 call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %hel_p, i32 4, i32 4, i1 false)
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29 call void @llvm.memmove.p0i8.p0i8.i32(i8* %target_p, i8* %hello_u_p, i32 8, i32 8, i1 false)
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30 ret i32 0
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31 }
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33 ; PR2370
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34 define void @test4(i8* %a) {
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35 tail call void @llvm.memmove.p0i8.p0i8.i32(i8* %a, i8* %a, i32 100, i32 1, i1 false)
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36 ret void
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37 }
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39 declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind