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<h3>
Andreas Klebinger pushed to branch wip/andreask/xchg_primop
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
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<h4>
Commits:
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<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/57952bd7bb4aa3d715e2725decab8bbf77a1ff55">57952bd7</a></strong>
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<span>by Andreas Klebinger</span>
<i>at 2020-05-19T18:15:42+02:00</i>
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<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add testcase.
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<h4>2 changed files:</h4>
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testsuite/tests/codeGen/should_run/all.T
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testsuite/tests/codeGen/should_run/cg_xchg001.hs
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<h4>Changes:</h4>
<li id="b9bba9766faf563ab195fb1402f14fa78ad5c66f">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/57952bd7bb4aa3d715e2725decab8bbf77a1ff55#b9bba9766faf563ab195fb1402f14fa78ad5c66f"><strong>testsuite/tests/codeGen/should_run/all.T</strong></a>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="205" 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">@@ -205,3 +205,4 @@ test('T15892',</td>
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<pre style="margin: 0;"> <span id="LC205" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16617</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC206" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16449_2</span><span class="p">',</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">0</span><span class="p">),</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;"> <span id="LC207" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">T16846</span><span class="p">',</span> <span class="p">[</span><span class="nv" style="color: #008080;">only_ways</span><span class="p">(['</span><span class="s1" style="color: #d14;">optasm</span><span class="p">']),</span> <span class="nv" style="color: #008080;">exit_code</span><span class="p">(</span><span class="mi" style="color: #099;">1</span><span class="p">)],</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span>
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<pre style="margin: 0;">+<span id="LC208" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">cg_xchg001</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile_and_run</span><span class="p">,</span> <span class="p">[''])</span></span></pre>
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<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/57952bd7bb4aa3d715e2725decab8bbf77a1ff55#adf5225589c3a01be46a7e6e9927a0d7f772d32d"><strong>testsuite/tests/codeGen/should_run/cg_xchg001.hs</strong></a>
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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE CPP, MagicHash, BlockArguments, UnboxedTuples #-}</span></span>
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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Tests for the atomic exchange primop.</span></span>
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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- We initialize a value with 1, and then perform exchanges on it</span></span>
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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- with two different values. At the end all the values should still</span></span>
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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- be present.</span></span>
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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">Main</span> <span class="p">(</span> <span class="nf" style="color: #900; font-weight: 600;">main</span> <span class="p">)</span> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.Bits</span></span>
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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Int</span></span>
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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Prim</span></span>
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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Word</span></span>
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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Monad</span></span>
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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Control.Concurrent</span></span>
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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.Marshal.Alloc</span></span>
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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Foreign.Storable</span></span>
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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">Data.List</span></span>
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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>
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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Types</span></span>
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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"></span>
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24
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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="n" style="color: #333;">include</span> <span class="s" style="color: #d14;">"MachDeps.h"</span></span>
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25
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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>
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26
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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">main</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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27
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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"> <span class="n" style="color: #333;">alloca</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">ptr_i</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">do</span></span>
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28
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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell"> <span class="n" style="color: #333;">poke</span> <span class="n" style="color: #333;">ptr_i</span> <span class="p">(</span><span class="mi" style="color: #099;">1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"> <span class="n" style="color: #333;">w1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newEmptyMVar</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">MVar</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"> <span class="n" style="color: #333;">forkIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"> <span class="n" style="color: #333;">v</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">50000</span> <span class="mi" style="color: #099;">2</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"> <span class="n" style="color: #333;">putMVar</span> <span class="n" style="color: #333;">w1</span> <span class="n" style="color: #333;">v</span></span>
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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"> <span class="n" style="color: #333;">v2</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">50000</span> <span class="mi" style="color: #099;">3</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"> <span class="n" style="color: #333;">v1</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">takeMVar</span> <span class="n" style="color: #333;">w1</span></span>
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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"> <span class="n" style="color: #333;">v0</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">peek</span> <span class="n" style="color: #333;">ptr_i</span></span>
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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"> <span class="n" style="color: #333;">print</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">sort</span> <span class="p">[</span><span class="n" style="color: #333;">v0</span><span class="p">,</span><span class="n" style="color: #333;">v1</span><span class="p">,</span><span class="n" style="color: #333;">v2</span><span class="p">]</span></span>
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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="mi" style="color: #099;">0</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">return</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"><span class="n" style="color: #333;">swapN</span> <span class="n" style="color: #333;">n</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">ptr</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"> <span class="n" style="color: #333;">val'</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">swap</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">val</span></span>
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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"> <span class="n" style="color: #333;">swapN</span> <span class="p">(</span><span class="n" style="color: #333;">n</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;">val'</span> <span class="n" style="color: #333;">ptr</span></span>
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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC45" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">swap</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>
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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell"><span class="n" style="color: #333;">swap</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Ptr</span> <span class="n" style="color: #333;">ptr</span><span class="p">)</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">val</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="o" style="font-weight: 600;">$</span> <span class="nf" style="color: #900; font-weight: 600;">\</span><span class="n" style="color: #333;">s</span> <span class="o" style="font-weight: 600;">-></span> <span class="kr" style="font-weight: 600;">case</span> <span class="p">(</span><span class="n" style="color: #333;">interlockedExchangeInt</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">ptr</span> <span class="n" style="color: #333;">val</span> <span class="n" style="color: #333;">s</span><span class="p">)</span> <span class="kr" style="font-weight: 600;">of</span></span>
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49
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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">(</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">s2</span><span class="p">,</span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="n" style="color: #333;">old_val</span> <span class="o" style="font-weight: 600;">#</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"></span></pre>
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