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annotate test/CodeGen/Generic/fwdtwice.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children afa8332a0e37
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s
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2
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3 ;;
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4 ;; Test the sequence:
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5 ;; cast -> setle 0, %cast -> br %cond
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6 ;; This sequence should cause the cast value to be forwarded twice,
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7 ;; i.e., cast is forwarded to the setle and the setle is forwarded
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8 ;; to the branch.
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9 ;; register argument of the "branch-on-register" instruction, i.e.,
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10 ;;
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11 ;; This produces the bogus output instruction:
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12 ;; brlez <NULL VALUE>, .L_SumArray_bb3.
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13 ;; This came from %bb1 of sumarrray.ll generated from sumarray.c.
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14
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15 define i32 @SumArray(i32 %Num) {
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16 %Num.upgrd.1 = alloca i32 ; <i32*> [#uses=2]
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17 br label %Top
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18
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19 Top: ; preds = %Top, %0
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20 store i32 %Num, i32* %Num.upgrd.1
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21 %reg108 = load i32* %Num.upgrd.1 ; <i32> [#uses=1]
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22 %cast1006 = bitcast i32 %reg108 to i32 ; <i32> [#uses=1]
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23 %cond1001 = icmp ule i32 %cast1006, 0 ; <i1> [#uses=1]
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24 br i1 %cond1001, label %bb6, label %Top
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25
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26 bb6: ; preds = %Top
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27 ret i32 42
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28 }
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