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annotate test/CodeGen/X86/2006-01-19-ISelFoldingBug.ll @ 100:7d135dc70f03 LLVM 3.9

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents afa8332a0e37
children 803732b1fca8
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e4204d083e25 LLVM 3.5
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -march=x86 -mcpu=generic | \
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2 ; RUN: grep shld | count 1
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3 ;
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4 ; Check that the isel does not fold the shld, which already folds a load
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5 ; and has two uses, into a store.
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7 @A = external global i32 ; <i32*> [#uses=2]
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8
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9 define i32 @test5(i32 %B, i8 %C) {
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afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 %tmp.1 = load i32, i32* @A ; <i32> [#uses=1]
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11 %shift.upgrd.1 = zext i8 %C to i32 ; <i32> [#uses=1]
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12 %tmp.2 = shl i32 %tmp.1, %shift.upgrd.1 ; <i32> [#uses=1]
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13 %tmp.3 = sub i8 32, %C ; <i8> [#uses=1]
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14 %shift.upgrd.2 = zext i8 %tmp.3 to i32 ; <i32> [#uses=1]
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15 %tmp.4 = lshr i32 %B, %shift.upgrd.2 ; <i32> [#uses=1]
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16 %tmp.5 = or i32 %tmp.4, %tmp.2 ; <i32> [#uses=2]
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17 store i32 %tmp.5, i32* @A
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18 ret i32 %tmp.5
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19 }
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