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<h3>
 Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ffc3da474bd6febf8a120ebd432ad69f92fe03e0">ffc3da47</a></strong>
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<span>by Sylvain Henry</span>
<i>at 2020-09-02T15:56:11-04:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove outdated note
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<h4>1 changed file:</h4>
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<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
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<h4>Changes:</h4>
<li id="0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ffc3da474bd6febf8a120ebd432ad69f92fe03e0#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77"><strong>compiler/GHC/Builtin/Names.hs</strong></a>
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<td class="diff-line-num unfold js-unfold old_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">...</td>
<td class="diff-line-num unfold js-unfold 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">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -116,35 +116,6 @@ known keys. See</td>
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<pre style="margin: 0;"> <span id="LC116" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [One-tuples] (Wrinkle: Make boxed one-tuple names have known keys)</span></span>
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<pre style="margin: 0;"> <span id="LC117" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">in GHC.Builtin.Types.</span></span>
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<pre style="margin: 0;"> <span id="LC118" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC119" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [The integer library]</span></span>
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<pre style="margin: 0;">-<span id="LC120" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">~~~~~~~~~~~~~~~~~~~~~~~~~~</span></span>
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<pre style="margin: 0;">-<span id="LC121" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC122" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Clearly, we need to know the names of various definitions of the integer</span></span>
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<pre style="margin: 0;">-<span id="LC123" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">library, e.g. the type itself, `mkInteger` etc. But there are two possible</span></span>
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<pre style="margin: 0;">-<span id="LC124" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">implementations of the integer library:</span></span>
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<pre style="margin: 0;">-<span id="LC125" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC126" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * integer-gmp (fast, but uses libgmp, which may not be available on all</span></span>
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<pre style="margin: 0;">-<span id="LC127" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   targets and is GPL licensed)</span></span>
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<pre style="margin: 0;">-<span id="LC128" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * integer-simple (slow, but pure Haskell and BSD-licensed)</span></span>
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<pre style="margin: 0;">-<span id="LC129" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC130" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">We want the compiler to work with either one. The way we achieve this is:</span></span>
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<pre style="margin: 0;">-<span id="LC131" class="line" lang="haskell"></span>
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<pre style="margin: 0;">-<span id="LC132" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * When compiling the integer-{gmp,simple} library, we pass</span></span>
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<pre style="margin: 0;">-<span id="LC133" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">     -this-unit-id  integer-wired-in</span></span>
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<td class="diff-line-num old old_line" data-linenumber="134" 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">
134
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC134" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   to GHC (see the cabal file libraries/integer-{gmp,simple}.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="135" 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">
135
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC135" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> * This way, GHC can use just this UnitID (see Module.integerUnitId) when</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="136" 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">
136
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC136" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">   generating code, and the linker will succeed.</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="137" 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">
137
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC137" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="138" 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">
138
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC138" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Unfortuately, the abstraction is not complete: When using integer-gmp, we</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="139" 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">
139
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC139" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">really want to use the S# constructor directly. This is controlled by</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="140" 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">
140
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC140" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">the `integerLibrary` field of `DynFlags`: If it is IntegerGMP, we use</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="141" 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">
141
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC141" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">this constructor directly (see  CorePrep.lookupIntegerSDataConName)</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="142" 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">
142
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC142" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="143" 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">
143
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC143" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">When GHC reads the package data base, it (internally only) pretends it has UnitId</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="144" 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">
144
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC144" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">`integer-wired-in` instead of the actual UnitId (which includes the version</span></span>
</pre>
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<td class="diff-line-num old old_line" data-linenumber="145" 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">
145
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC145" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">number); just like for `base` and other packages, as described in</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="146" 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">
146
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC146" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">Note [Wired-in units] in GHC.Unit.Module. This is done in</span></span>
</pre>
</td>
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<td class="diff-line-num old old_line" data-linenumber="147" 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">
147
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<td class="diff-line-num new_line old" data-linenumber="119" 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="LC147" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">GHC.Unit.State.findWiredInUnits.</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="148" 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">
148
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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="haskell"><span class="cm" style="color: #998; font-style: italic;">-}</span></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="149" 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">
149
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<td class="diff-line-num new_line" data-linenumber="120" 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">
120
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<pre style="margin: 0;"> <span id="LC120" class="line" lang="haskell"></span>
</pre>
</td>
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<td class="diff-line-num old_line" data-linenumber="150" 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">
150
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<td class="diff-line-num new_line" data-linenumber="121" 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">
121
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<pre style="margin: 0;"> <span id="LC121" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP #-}</span></span>
</pre>
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