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annotate test/Transforms/ScalarRepl/nonzero-first-index.ll @ 83:60c9769439b8 LLVM3.7

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LLVM 3.7
author Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
date Wed, 18 Feb 2015 14:55:36 +0900
parents 95c75e76d11b
children afa8332a0e37
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt < %s -scalarrepl -S | FileCheck %s
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2
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3 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32"
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4 target triple = "i386-pc-linux-gnu"
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5
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6 %nested = type { i32, [4 x i32] }
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7
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8 ; Check that a GEP with a non-zero first index does not prevent SROA as long
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9 ; as the resulting offset corresponds to an element in the alloca.
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10 define i32 @test1() {
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11 ; CHECK-LABEL: @test1(
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12 ; CHECK-NOT: = i160
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13 ; CHECK: ret i32 undef
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14 %A = alloca %nested
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15 %B = getelementptr %nested* %A, i32 0, i32 1, i32 0
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16 %C = getelementptr i32* %B, i32 2
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17 %D = load i32* %C
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18 ret i32 %D
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19 }
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20
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21 ; But, if the offset is out of range, then it should not be transformed.
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22 define i32 @test2() {
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23 ; CHECK-LABEL: @test2(
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24 ; CHECK: i160
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25 %A = alloca %nested
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26 %B = getelementptr %nested* %A, i32 0, i32 1, i32 0
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27 %C = getelementptr i32* %B, i32 4
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28 %D = load i32* %C
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29 ret i32 %D
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30 }
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31
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32 ; Try it with a bitcast and single GEP....
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33 define i32 @test3() {
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34 ; CHECK-LABEL: @test3(
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35 ; CHECK-NOT: = i160
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36 ; CHECK: ret i32 undef
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37 %A = alloca %nested
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38 %B = bitcast %nested* %A to i32*
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39 %C = getelementptr i32* %B, i32 2
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40 %D = load i32* %C
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41 ret i32 %D
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42 }
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43
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44 ; ...and again make sure that out-of-range accesses are not transformed.
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45 define i32 @test4() {
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46 ; CHECK-LABEL: @test4(
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47 ; CHECK: i160
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48 %A = alloca %nested
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49 %B = bitcast %nested* %A to i32*
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50 %C = getelementptr i32* %B, i32 -1
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51 %D = load i32* %C
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52 ret i32 %D
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53 }