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annotate test/CodeGen/X86/dag-merge-fast-accesses.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents
children 7d135dc70f03
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95
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-slow-unaligned-mem-16 | FileCheck %s --check-prefix=FAST
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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2 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+slow-unaligned-mem-16 | FileCheck %s --check-prefix=SLOW
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3
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4 ; Verify that the DAGCombiner is creating unaligned 16-byte loads and stores
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5 ; if and only if those are fast.
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6
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 define void @merge_const_vec_store(i64* %ptr) {
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8 ; FAST-LABEL: merge_const_vec_store:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 ; FAST: # BB#0:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ; FAST-NEXT: xorps %xmm0, %xmm0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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11 ; FAST-NEXT: movups %xmm0, (%rdi)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 ; FAST-NEXT: retq
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13 ;
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14 ; SLOW-LABEL: merge_const_vec_store:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ; SLOW: # BB#0:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 ; SLOW-NEXT: movq $0, (%rdi)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 ; SLOW-NEXT: movq $0, 8(%rdi)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 ; SLOW-NEXT: retq
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19
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20 %idx0 = getelementptr i64, i64* %ptr, i64 0
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21 %idx1 = getelementptr i64, i64* %ptr, i64 1
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22
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23 store i64 0, i64* %idx0, align 8
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24 store i64 0, i64* %idx1, align 8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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25 ret void
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26 }
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27
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28
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29 define void @merge_vec_element_store(<4 x double> %v, double* %ptr) {
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30 ; FAST-LABEL: merge_vec_element_store:
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31 ; FAST: # BB#0:
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32 ; FAST-NEXT: movups %xmm0, (%rdi)
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33 ; FAST-NEXT: retq
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34 ;
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35 ; SLOW-LABEL: merge_vec_element_store:
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36 ; SLOW: # BB#0:
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37 ; SLOW-NEXT: movlpd %xmm0, (%rdi)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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38 ; SLOW-NEXT: movhpd %xmm0, 8(%rdi)
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39 ; SLOW-NEXT: retq
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40
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41 %vecext0 = extractelement <4 x double> %v, i32 0
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42 %vecext1 = extractelement <4 x double> %v, i32 1
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43
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44 %idx0 = getelementptr double, double* %ptr, i64 0
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45 %idx1 = getelementptr double, double* %ptr, i64 1
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46
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47 store double %vecext0, double* %idx0, align 8
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48 store double %vecext1, double* %idx1, align 8
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49 ret void
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50 }
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51
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52
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53 define void @merge_vec_load_and_stores(i64 *%ptr) {
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54 ; FAST-LABEL: merge_vec_load_and_stores:
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55 ; FAST: # BB#0:
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56 ; FAST-NEXT: movups (%rdi), %xmm0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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57 ; FAST-NEXT: movups %xmm0, 40(%rdi)
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58 ; FAST-NEXT: retq
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59 ;
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60 ; SLOW-LABEL: merge_vec_load_and_stores:
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61 ; SLOW: # BB#0:
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62 ; SLOW-NEXT: movq (%rdi), %rax
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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63 ; SLOW-NEXT: movq 8(%rdi), %rcx
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64 ; SLOW-NEXT: movq %rax, 40(%rdi)
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65 ; SLOW-NEXT: movq %rcx, 48(%rdi)
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66 ; SLOW-NEXT: retq
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67
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68 %idx0 = getelementptr i64, i64* %ptr, i64 0
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69 %idx1 = getelementptr i64, i64* %ptr, i64 1
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70
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71 %ld0 = load i64, i64* %idx0, align 4
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72 %ld1 = load i64, i64* %idx1, align 4
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73
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74 %idx4 = getelementptr i64, i64* %ptr, i64 5
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75 %idx5 = getelementptr i64, i64* %ptr, i64 6
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76
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77 store i64 %ld0, i64* %idx4, align 4
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78 store i64 %ld1, i64* %idx5, align 4
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79 ret void
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80 }
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81