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annotate test/CodeGen/X86/lsr-nonaffine.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 803732b1fca8
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc -asm-verbose=false -march=x86-64 -mtriple=x86_64-apple-darwin -o - < %s | FileCheck %s
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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2
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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3 ; LSR should leave non-affine expressions alone because it currently
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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4 ; doesn't know how to do anything with them, and when it tries, it
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 ; gets SCEVExpander's current expansion for them, which is suboptimal.
95c75e76d11b LLVM 3.4
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6
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 ; CHECK: xorl %eax, %eax
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 ; CHECK-NEXT: align
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 ; CHECK-NEXT: BB0_1:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ; CHECK-NEXT: movq %rax, (%rdx)
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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11 ; CHECK-NEXT: addq %rsi, %rax
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 ; CHECK-NEXT: cmpq %rdi, %rax
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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13 ; CHECK-NEXT: jl
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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14 ; CHECK-NEXT: imulq %rax, %rax
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ; CHECK-NEXT: ret
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 define i64 @foo(i64 %n, i64 %s, i64* %p) nounwind {
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 entry:
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 br label %loop
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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20 loop:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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21 %i = phi i64 [ 0, %entry ], [ %i.next, %loop ]
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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22 store volatile i64 %i, i64* %p
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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23 %i.next = add i64 %i, %s
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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24 %c = icmp slt i64 %i.next, %n
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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25 br i1 %c, label %loop, label %exit
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26
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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27 exit:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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28 %mul = mul i64 %i.next, %i.next
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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29 ret i64 %mul
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30 }