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annotate test/CodeGen/X86/optimize-max-2.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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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -march=x86-64 | grep cmov | count 2
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2 ; RUN: llc < %s -march=x86-64 | FileCheck %s
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4 ; CHECK: jne
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5 ; CHECK-NOT: jne
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7 ; LSR's OptimizeMax function shouldn't try to eliminate this max, because
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8 ; it has three operands.
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10 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
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11
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12 define void @foo(double* nocapture %p, i64 %x, i64 %y) nounwind {
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13 entry:
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14 %tmp = icmp eq i64 %y, 0 ; <i1> [#uses=1]
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15 %umax = select i1 %tmp, i64 1, i64 %y ; <i64> [#uses=2]
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16 %tmp8 = icmp ugt i64 %umax, %x ; <i1> [#uses=1]
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17 %umax9 = select i1 %tmp8, i64 %umax, i64 %x ; <i64> [#uses=1]
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18 br label %bb4
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20 bb4: ; preds = %bb4, %entry
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21 %i.07 = phi i64 [ 0, %entry ], [ %2, %bb4 ] ; <i64> [#uses=2]
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afa8332a0e37 LLVM 3.8
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22 %scevgep = getelementptr double, double* %p, i64 %i.07 ; <double*> [#uses=2]
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23 %0 = load double, double* %scevgep, align 8 ; <double> [#uses=1]
0
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24 %1 = fmul double %0, 2.000000e+00 ; <double> [#uses=1]
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25 store double %1, double* %scevgep, align 8
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26 %2 = add i64 %i.07, 1 ; <i64> [#uses=2]
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27 %exitcond = icmp eq i64 %2, %umax9 ; <i1> [#uses=1]
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28 br i1 %exitcond, label %return, label %bb4
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30 return: ; preds = %bb4
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31 ret void
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32 }