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<h3>
Ben Gamari pushed to branch wip/unroll-evac
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/commit/3a120e07a876c6e8e109b56c9da47632416b86f6">3a120e07</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2019-05-10T23:58:32Z</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Evac: Try unrolling copying
</pre>
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<h4>1 changed file:</h4>
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rts/sm/Evac.c
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<h4>Changes:</h4>
<li id="37a93df244a7789fddf557443b6398d06763e9cc">
<a href="https://gitlab.haskell.org/ghc/ghc/commit/3a120e07a876c6e8e109b56c9da47632416b86f6#37a93df244a7789fddf557443b6398d06763e9cc"><strong>rts/sm/Evac.c</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -12,6 +12,7 @@</td>
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12
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<pre style="margin: 0;"> <span id="LC12" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> * ---------------------------------------------------------------------------*/</span></span>
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13
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<pre style="margin: 0;"> <span id="LC13" class="line" lang="c"></span>
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14
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14
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<pre style="margin: 0;"> <span id="LC14" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "PosixSource.h"</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include <string.h></span></span>
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15
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<pre style="margin: 0;"> <span id="LC16" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "Rts.h"</span></span>
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16
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17
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<pre style="margin: 0;"> <span id="LC17" class="line" lang="c"></span>
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17
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<pre style="margin: 0;"> <span id="LC18" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#include "Evac.h"</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="88" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="89" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -88,20 +89,35 @@ alloc_for_copy (uint32_t size, uint32_t gen_no)</td>
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88
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<pre style="margin: 0;"> <span id="LC89" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> The evacuate() code</span></span>
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89
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<pre style="margin: 0;"> <span id="LC90" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;"> -------------------------------------------------------------------------- */</span></span>
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90
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91
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<pre style="margin: 0;"> <span id="LC91" class="line" lang="c"></span>
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<pre style="margin: 0;">+<span id="LC92" class="line" lang="c"><span class="cm" style="color: #998; font-style: italic;">/* Manually unroll copy for small closures */</span></span>
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93
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<pre style="margin: 0;">+<span id="LC93" class="line" lang="c"><span class="n" style="color: #333;">STATIC_INLINE</span> <span class="n" style="color: #333;">GNUC_ATTR_HOT</span> <span class="kt" style="color: #458; font-weight: 600;">void</span></span>
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94
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<pre style="margin: 0;">+<span id="LC94" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">copy_words</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">from</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">to</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">n</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC95" class="line" lang="c"><span class="p">{</span></span>
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<td class="diff-line-num new new_line" data-linenumber="96" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC96" class="line" lang="c"> <span class="k" style="font-weight: 600;">switch</span> <span class="p">(</span><span class="n" style="color: #333;">n</span><span class="p">)</span> <span class="p">{</span></span>
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<td class="diff-line-num new new_line" data-linenumber="97" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
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<pre style="margin: 0;">+<span id="LC97" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">7</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">6</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">6</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC98" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">6</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">5</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">5</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="99" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
99
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<pre style="margin: 0;">+<span id="LC99" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">5</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">4</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">4</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<pre style="margin: 0;">+<span id="LC100" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">4</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">3</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">3</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
101
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<pre style="margin: 0;">+<span id="LC101" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">3</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">2</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">2</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="102" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
102
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<pre style="margin: 0;">+<span id="LC102" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">2</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="103" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
103
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<pre style="margin: 0;">+<span id="LC103" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">1</span><span class="p">:</span> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">];</span> <span class="n" style="color: #333;">FALLTHROUGH</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="104" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
104
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<pre style="margin: 0;">+<span id="LC104" class="line" lang="c"> <span class="k" style="font-weight: 600;">case</span> <span class="mi" style="color: #099;">0</span><span class="p">:</span> <span class="k" style="font-weight: 600;">break</span><span class="p">;</span></span>
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<td class="diff-line-num new new_line" data-linenumber="105" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
105
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<pre style="margin: 0;">+<span id="LC105" class="line" lang="c"> <span class="nl">default:</span></span>
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<td class="diff-line-num new new_line" data-linenumber="106" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
106
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<pre style="margin: 0;">+<span id="LC106" class="line" lang="c"> <span class="n" style="color: #333;">memcpy</span><span class="p">(</span><span class="n" style="color: #333;">to</span><span class="p">,</span> <span class="n" style="color: #333;">from</span><span class="p">,</span> <span class="n" style="color: #333;">n</span> <span class="o" style="font-weight: 600;">*</span> <span class="k" style="font-weight: 600;">sizeof</span><span class="p">(</span><span class="n" style="color: #333;">StgWord</span><span class="p">));</span></span>
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<td class="diff-line-num new new_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
107
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<pre style="margin: 0;">+<span id="LC107" class="line" lang="c"> <span class="p">}</span></span>
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108
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<pre style="margin: 0;">+<span id="LC108" class="line" lang="c"><span class="p">}</span></span>
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109
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<pre style="margin: 0;">+<span id="LC109" class="line" lang="c"></span>
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91
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110
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<pre style="margin: 0;"> <span id="LC110" class="line" lang="c"><span class="n" style="color: #333;">STATIC_INLINE</span> <span class="n" style="color: #333;">GNUC_ATTR_HOT</span> <span class="kt" style="color: #458; font-weight: 600;">void</span></span>
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92
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111
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<pre style="margin: 0;"> <span id="LC111" class="line" lang="c"><span class="nf" style="color: #900; font-weight: 600;">copy_tag</span><span class="p">(</span><span class="n" style="color: #333;">StgClosure</span> <span class="o" style="font-weight: 600;">**</span><span class="n" style="color: #333;">p</span><span class="p">,</span> <span class="k" style="font-weight: 600;">const</span> <span class="n" style="color: #333;">StgInfoTable</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">info</span><span class="p">,</span></span>
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93
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<td class="diff-line-num new_line" data-linenumber="112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
112
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<pre style="margin: 0;"> <span id="LC112" class="line" lang="c"> <span class="n" style="color: #333;">StgClosure</span> <span class="o" style="font-weight: 600;">*</span><span class="n" style="color: #333;">src</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">size</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">gen_no</span><span class="p">,</span> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">tag</span><span class="p">)</span></span>
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94
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<td class="diff-line-num new_line" data-linenumber="113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
113
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="c"><span class="p">{</span></span>
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95
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<td class="diff-line-num new_line" data-linenumber="114" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
114
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<pre style="margin: 0;"> <span id="LC114" class="line" lang="c"> <span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">to</span><span class="p">,</span> <span class="n" style="color: #333;">from</span><span class="p">;</span></span>
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<td class="diff-line-num old old_line" data-linenumber="96" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
96
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<td class="diff-line-num new_line old" data-linenumber="115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">
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<pre style="margin: 0;">-<span id="LC96" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">i</span><span class="p">;</span></span>
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97
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<td class="diff-line-num new_line" data-linenumber="115" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
115
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<pre style="margin: 0;"> <span id="LC115" class="line" lang="c"></span>
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<td class="diff-line-num old_line" data-linenumber="98" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
98
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<td class="diff-line-num new_line" data-linenumber="116" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
116
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<pre style="margin: 0;"> <span id="LC116" class="line" lang="c"> <span class="n" style="color: #333;">to</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">alloc_for_copy</span><span class="p">(</span><span class="n" style="color: #333;">size</span><span class="p">,</span><span class="n" style="color: #333;">gen_no</span><span class="p">);</span></span>
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99
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<td class="diff-line-num new_line" data-linenumber="117" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
117
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="c"></span>
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100
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<td class="diff-line-num new_line" data-linenumber="118" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
118
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="c"> <span class="n" style="color: #333;">from</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">StgPtr</span><span class="p">)</span><span class="n" style="color: #333;">src</span><span class="p">;</span></span>
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<td class="diff-line-num old_line" data-linenumber="101" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
101
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<td class="diff-line-num new_line" data-linenumber="119" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
119
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<pre style="margin: 0;"> <span id="LC119" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">W_</span><span class="p">)</span><span class="n" style="color: #333;">info</span><span class="p">;</span></span>
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102
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<pre style="margin: 0;">-<span id="LC102" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">1</span><span class="p">;</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">size</span><span class="p">;</span> <span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">++</span><span class="p">)</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">// unroll for small i</span></span>
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<pre style="margin: 0;">-<span id="LC103" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">];</span></span>
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104
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<pre style="margin: 0;">-<span id="LC104" class="line" lang="c"> <span class="p">}</span></span>
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120
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<pre style="margin: 0;">+<span id="LC120" class="line" lang="c"> <span class="n" style="color: #333;">copy_words</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">);</span></span>
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105
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121
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<pre style="margin: 0;"> <span id="LC121" class="line" lang="c"></span>
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106
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122
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<pre style="margin: 0;"> <span id="LC122" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// if (to+size+2 < bd->start + BLOCK_SIZE_W) {</span></span>
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107
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123
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="c"><span class="c1" style="color: #998; font-style: italic;">// __builtin_prefetch(to + size + 2, 1);</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="170" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -154,9 +170,7 @@ copy_tag_nolock(StgClosure **p, const StgInfoTable *info,</td>
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154
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170
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<pre style="margin: 0;"> <span id="LC170" class="line" lang="c"></span>
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155
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171
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<pre style="margin: 0;"> <span id="LC171" class="line" lang="c"> <span class="n" style="color: #333;">from</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">StgPtr</span><span class="p">)</span><span class="n" style="color: #333;">src</span><span class="p">;</span></span>
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156
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172
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<pre style="margin: 0;"> <span id="LC172" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">W_</span><span class="p">)</span><span class="n" style="color: #333;">info</span><span class="p">;</span></span>
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157
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<pre style="margin: 0;">-<span id="LC157" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">1</span><span class="p">;</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">size</span><span class="p">;</span> <span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">++</span><span class="p">)</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">// unroll for small i</span></span>
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158
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<pre style="margin: 0;">-<span id="LC158" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">];</span></span>
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159
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<pre style="margin: 0;">-<span id="LC159" class="line" lang="c"> <span class="p">}</span></span>
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173
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<pre style="margin: 0;">+<span id="LC173" class="line" lang="c"> <span class="n" style="color: #333;">copy_words</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="n" style="color: #333;">size</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">);</span></span>
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160
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174
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<pre style="margin: 0;"> <span id="LC174" class="line" lang="c"></span>
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161
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175
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<pre style="margin: 0;"> <span id="LC175" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// if somebody else reads the forwarding pointer, we better make</span></span>
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162
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176
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<pre style="margin: 0;"> <span id="LC176" class="line" lang="c"> <span class="c1" style="color: #998; font-style: italic;">// sure there's a closure at the end of it.</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="185" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -185,7 +199,6 @@ copyPart(StgClosure **p, StgClosure *src, uint32_t size_to_reserve,</td>
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185
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199
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<pre style="margin: 0;"> <span id="LC199" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">size_to_copy</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">gen_no</span><span class="p">)</span></span>
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186
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200
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<pre style="margin: 0;"> <span id="LC200" class="line" lang="c"><span class="p">{</span></span>
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187
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<pre style="margin: 0;"> <span id="LC201" class="line" lang="c"> <span class="n" style="color: #333;">StgPtr</span> <span class="n" style="color: #333;">to</span><span class="p">,</span> <span class="n" style="color: #333;">from</span><span class="p">;</span></span>
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<pre style="margin: 0;">-<span id="LC188" class="line" lang="c"> <span class="kt" style="color: #458; font-weight: 600;">uint32_t</span> <span class="n" style="color: #333;">i</span><span class="p">;</span></span>
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189
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202
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<pre style="margin: 0;"> <span id="LC202" class="line" lang="c"> <span class="n" style="color: #333;">StgWord</span> <span class="n" style="color: #333;">info</span><span class="p">;</span></span>
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190
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203
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<pre style="margin: 0;"> <span id="LC203" class="line" lang="c"></span>
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191
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204
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<pre style="margin: 0;"> <span id="LC204" class="line" lang="c"><span class="cp" style="color: #999; font-weight: 600;">#if defined(PARALLEL_GC)</span></span>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -211,9 +224,7 @@ spin:</td>
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<pre style="margin: 0;"> <span id="LC224" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC225" class="line" lang="c"> <span class="n" style="color: #333;">from</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="n" style="color: #333;">StgPtr</span><span class="p">)</span><span class="n" style="color: #333;">src</span><span class="p">;</span></span>
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<pre style="margin: 0;"> <span id="LC226" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">0</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">info</span><span class="p">;</span></span>
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<pre style="margin: 0;">-<span id="LC214" class="line" lang="c"> <span class="k" style="font-weight: 600;">for</span> <span class="p">(</span><span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;">=</span> <span class="mi" style="color: #099;">1</span><span class="p">;</span> <span class="n" style="color: #333;">i</span> <span class="o" style="font-weight: 600;"><</span> <span class="n" style="color: #333;">size_to_copy</span><span class="p">;</span> <span class="n" style="color: #333;">i</span><span class="o" style="font-weight: 600;">++</span><span class="p">)</span> <span class="p">{</span> <span class="c1" style="color: #998; font-style: italic;">// unroll for small i</span></span>
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<pre style="margin: 0;">-<span id="LC215" class="line" lang="c"> <span class="n" style="color: #333;">to</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">]</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">from</span><span class="p">[</span><span class="n" style="color: #333;">i</span><span class="p">];</span></span>
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<pre style="margin: 0;">-<span id="LC216" class="line" lang="c"> <span class="p">}</span></span>
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<pre style="margin: 0;">+<span id="LC227" class="line" lang="c"> <span class="n" style="color: #333;">copy_words</span><span class="p">(</span><span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">from</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="o" style="font-weight: 600;">&</span><span class="n" style="color: #333;">to</span><span class="p">[</span><span class="mi" style="color: #099;">1</span><span class="p">],</span> <span class="n" style="color: #333;">size_to_copy</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="p">);</span></span>
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<pre style="margin: 0;"> <span id="LC228" class="line" lang="c"></span>
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<pre style="margin: 0;"> <span id="LC229" class="line" lang="c"> <span class="n" style="color: #333;">write_barrier</span><span class="p">();</span></span>
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<pre style="margin: 0;"> <span id="LC230" class="line" lang="c"> <span class="n" style="color: #333;">src</span><span class="o" style="font-weight: 600;">-></span><span class="n" style="color: #333;">header</span><span class="p">.</span><span class="n" style="color: #333;">info</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="k" style="font-weight: 600;">const</span> <span class="n" style="color: #333;">StgInfoTable</span><span class="o" style="font-weight: 600;">*</span><span class="p">)</span><span class="n" style="color: #333;">MK_FORWARDING_PTR</span><span class="p">(</span><span class="n" style="color: #333;">to</span><span class="p">);</span></span>
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