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annotate test/Analysis/BasicAA/2003-02-26-AccessSizeTest.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
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; This testcase makes sure that size is taken to account when alias analysis
95c75e76d11b LLVM 3.4
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2 ; is performed. It is not legal to delete the second load instruction because
95c75e76d11b LLVM 3.4
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3 ; the value computed by the first load instruction is changed by the store.
95c75e76d11b LLVM 3.4
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5 ; RUN: opt < %s -basicaa -gvn -instcombine -S | FileCheck %s
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7 define i32 @test() {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 ; CHECK: %Y.DONOTREMOVE = load i32, i32* %A
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9 ; CHECK: %Z = sub i32 0, %Y.DONOTREMOVE
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10 %A = alloca i32
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11 store i32 0, i32* %A
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12 %X = load i32, i32* %A
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13 %B = bitcast i32* %A to i8*
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14 %C = getelementptr i8, i8* %B, i64 1
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15 store i8 1, i8* %C ; Aliases %A
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16 %Y.DONOTREMOVE = load i32, i32* %A
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17 %Z = sub i32 %X, %Y.DONOTREMOVE
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18 ret i32 %Z
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19 }
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