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annotate test/CodeGen/AArch64/bitcast.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 c2174574ed3a
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -mtriple=aarch64--linux-gnu | FileCheck %s
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2
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3 ; PR23065: SCALAR_TO_VECTOR implies the top elements 1 to N-1 of the N-element vector are undefined.
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4
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5 define <4 x i16> @foo1(<2 x i32> %a) {
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6 ; CHECK-LABEL: foo1:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 ; CHECK: movi d0, #0000000000000000
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8 ; CHECK-NEXT: ret
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10 %1 = shufflevector <2 x i32> <i32 58712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
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11 ; Can't optimize the following bitcast to scalar_to_vector.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 %2 = bitcast <2 x i32> %1 to <4 x i16>
afa8332a0e37 LLVM 3.8
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13 %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
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14 ret <4 x i16> %3
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15 }
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16
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17 define <4 x i16> @foo2(<2 x i32> %a) {
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18 ; CHECK-LABEL: foo2:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19 ; CHECK: movi d0, #0000000000000000
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20 ; CHECK-NEXT: ret
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21
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22 %1 = shufflevector <2 x i32> <i32 712, i32 undef>, <2 x i32> %a, <2 x i32> <i32 0, i32 2>
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23 ; Can't optimize the following bitcast to scalar_to_vector.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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24 %2 = bitcast <2 x i32> %1 to <4 x i16>
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25 %3 = shufflevector <4 x i16> %2, <4 x i16> undef, <4 x i32> <i32 1, i32 undef, i32 undef, i32 undef>
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26 ret <4 x i16> %3
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27 }