<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>cmm/CmmCommonBlockElimZ.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>CmmCommonBlockElimZ</span> <a name="line-2"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>elimCommonBlocks</span> <a name="line-3"></a> <span class='hs-layout'>)</span> <a name="line-4"></a><span class='hs-keyword'>where</span> <a name="line-5"></a> <a name="line-6"></a> <a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>BlockId</span> <a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>CmmExpr</span> <a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>iterate</span><span class='hs-layout'>,</span> <span class='hs-varid'>zip</span><span class='hs-layout'>,</span> <span class='hs-varid'>unzip</span><span class='hs-layout'>)</span> <a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ZipCfg</span> <a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ZipCfgCmmRep</span> <a name="line-12"></a> <a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Bits</span> <a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>List</span> <a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Word</span> <a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>FastString</span> <a name="line-17"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Outputable</span> <a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>UniqFM</span> <a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Unique</span> <a name="line-21"></a> <a name="line-22"></a><a name="my_trace"></a><span class='hs-definition'>my_trace</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <a name="line-23"></a><span class='hs-definition'>my_trace</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-conid'>False</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>pprTrace</span> <span class='hs-keyword'>else</span> <span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <a name="line-24"></a> <a name="line-25"></a><span class='hs-comment'>-- Eliminate common blocks:</span> <a name="line-26"></a><span class='hs-comment'>-- If two blocks are identical except for the label on the first node,</span> <a name="line-27"></a><span class='hs-comment'>-- then we can eliminate one of the blocks. To ensure that the semantics</span> <a name="line-28"></a><span class='hs-comment'>-- of the program are preserved, we have to rewrite each predecessor of the</span> <a name="line-29"></a><span class='hs-comment'>-- eliminated block to proceed with the block we keep.</span> <a name="line-30"></a> <a name="line-31"></a><span class='hs-comment'>-- The algorithm iterates over the blocks in the graph,</span> <a name="line-32"></a><span class='hs-comment'>-- checking whether it has seen another block that is equal modulo labels.</span> <a name="line-33"></a><span class='hs-comment'>-- If so, then it adds an entry in a map indicating that the new block</span> <a name="line-34"></a><span class='hs-comment'>-- is made redundant by the old block.</span> <a name="line-35"></a><span class='hs-comment'>-- Otherwise, it is added to the useful blocks.</span> <a name="line-36"></a> <a name="line-37"></a><a name="elimCommonBlocks"></a><span class='hs-comment'>-- TODO: Use optimization fuel</span> <a name="line-38"></a><span class='hs-definition'>elimCommonBlocks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmGraph</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmGraph</span> <a name="line-39"></a><span class='hs-definition'>elimCommonBlocks</span> <span class='hs-varid'>g</span> <span class='hs-keyglyph'>=</span> <a name="line-40"></a> <span class='hs-varid'>upd_graph</span> <span class='hs-varid'>g</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>$</span> <span class='hs-varid'>iterate</span> <span class='hs-varid'>common_block</span> <span class='hs-varid'>reset</span> <span class='hs-varid'>hashed_blocks</span> <a name="line-41"></a> <span class='hs-layout'>(</span><span class='hs-varid'>emptyUFM</span><span class='hs-layout'>,</span> <span class='hs-varid'>emptyBlockEnv</span><span class='hs-layout'>)</span> <a name="line-42"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>hashed_blocks</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>hash_block</span> <span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-layout'>(</span><span class='hs-varid'>postorder_dfs</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-43"></a> <span class='hs-varid'>reset</span> <span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>emptyUFM</span><span class='hs-layout'>,</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span> <a name="line-44"></a> <a name="line-45"></a><a name="iterate"></a><span class='hs-comment'>-- Iterate over the blocks until convergence</span> <a name="line-46"></a><span class='hs-definition'>iterate</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Bool</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>t</span> <a name="line-47"></a><span class='hs-definition'>iterate</span> <span class='hs-varid'>upd</span> <span class='hs-varid'>reset</span> <span class='hs-varid'>blocks</span> <span class='hs-varid'>state</span> <span class='hs-keyglyph'>=</span> <a name="line-48"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>foldl</span> <span class='hs-varid'>upd'</span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>state</span><span class='hs-layout'>)</span> <span class='hs-varid'>blocks</span> <span class='hs-keyword'>of</span> <a name="line-49"></a> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-varid'>state'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>iterate</span> <span class='hs-varid'>upd</span> <span class='hs-varid'>reset</span> <span class='hs-varid'>blocks</span> <span class='hs-layout'>(</span><span class='hs-varid'>reset</span> <span class='hs-varid'>state'</span><span class='hs-layout'>)</span> <a name="line-50"></a> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-varid'>state'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>state'</span> <a name="line-51"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>upd'</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>b'</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>upd</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>||</span> <span class='hs-varid'>b'</span><span class='hs-layout'>,</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- lift to track changes</span> <a name="line-52"></a> <a name="line-53"></a><a name="BidMap"></a><span class='hs-comment'>-- Try to find a block that is equal (or ``common'') to b.</span> <a name="line-54"></a><a name="BidMap"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>BidMap</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BlockEnv</span> <span class='hs-conid'>BlockId</span> <a name="line-55"></a><a name="State"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>State</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>UniqFM</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>CmmBlock</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>BidMap</span><span class='hs-layout'>)</span> <a name="line-56"></a><a name="common_block"></a><span class='hs-definition'>common_block</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Outputable</span> <span class='hs-varid'>h</span><span class='hs-layout'>,</span> <span class='hs-conid'>Uniquable</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>State</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-layout'>,</span> <span class='hs-conid'>CmmBlock</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Bool</span><span class='hs-layout'>,</span> <span class='hs-conid'>State</span><span class='hs-layout'>)</span> <a name="line-57"></a><span class='hs-definition'>common_block</span> <span class='hs-layout'>(</span><span class='hs-varid'>bmap</span><span class='hs-layout'>,</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>hash</span><span class='hs-layout'>,</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-58"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookupUFM</span> <span class='hs-varid'>bmap</span> <span class='hs-varid'>hash</span> <span class='hs-keyword'>of</span> <a name="line-59"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>bs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-conid'>List</span><span class='hs-varop'>.</span><span class='hs-varid'>find</span> <span class='hs-layout'>(</span><span class='hs-varid'>eqBlockBodyWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>eqBid</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>bs</span><span class='hs-layout'>,</span> <a name="line-60"></a> <span class='hs-varid'>lookupBlockEnv</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <a name="line-61"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>addSubst</span> <span class='hs-varid'>b'</span> <a name="line-62"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b'</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>b''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>blockId</span> <span class='hs-varid'>b'</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>b''</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>addSubst</span> <span class='hs-varid'>b'</span> <a name="line-63"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>addToUFM</span> <span class='hs-varid'>bmap</span> <span class='hs-varid'>hash</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-conop'>:</span> <span class='hs-varid'>bs</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-64"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>False</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>addToUFM</span> <span class='hs-varid'>bmap</span> <span class='hs-varid'>hash</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>subst</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-65"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>bid</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>blockId</span> <span class='hs-varid'>b</span> <a name="line-66"></a> <span class='hs-varid'>addSubst</span> <span class='hs-varid'>b'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>my_trace</span> <span class='hs-str'>"found new common block"</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-layout'>(</span><span class='hs-varid'>blockId</span> <span class='hs-varid'>b'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <a name="line-67"></a> <span class='hs-layout'>(</span><span class='hs-conid'>True</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varid'>bmap</span><span class='hs-layout'>,</span> <span class='hs-varid'>extendBlockEnv</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <span class='hs-layout'>(</span><span class='hs-varid'>blockId</span> <span class='hs-varid'>b'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-68"></a> <a name="line-69"></a><a name="upd_graph"></a><span class='hs-comment'>-- Given the map ``subst'' from BlockId -> BlockId, we rewrite the graph.</span> <a name="line-70"></a><span class='hs-definition'>upd_graph</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmGraph</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BidMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmGraph</span> <a name="line-71"></a><span class='hs-definition'>upd_graph</span> <span class='hs-varid'>g</span> <span class='hs-varid'>subst</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map_nodes</span> <span class='hs-varid'>id</span> <span class='hs-varid'>middle</span> <span class='hs-varid'>last</span> <span class='hs-varid'>g</span> <a name="line-72"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>middle</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapExpDeepMiddle</span> <span class='hs-varid'>exp</span> <a name="line-73"></a> <span class='hs-varid'>last</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>last'</span> <span class='hs-layout'>(</span><span class='hs-varid'>mapExpDeepLast</span> <span class='hs-varid'>exp</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <a name="line-74"></a> <span class='hs-varid'>last'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastBranch</span> <span class='hs-varid'>bid</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LastBranch</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>bid</span> <a name="line-75"></a> <span class='hs-varid'>last'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCondBranch</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cond</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>sub</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sub</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <a name="line-76"></a> <span class='hs-varid'>last'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCall</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>bid</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-varid'>res</span> <span class='hs-varid'>u</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LastCall</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>bid</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-varid'>res</span> <span class='hs-varid'>u</span> <a name="line-77"></a> <span class='hs-varid'>last'</span> <span class='hs-varid'>l</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>LastCall</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>l</span> <a name="line-78"></a> <span class='hs-varid'>last'</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastSwitch</span> <span class='hs-varid'>e</span> <span class='hs-varid'>bs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LastSwitch</span> <span class='hs-varid'>e</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-varid'>sub</span><span class='hs-layout'>)</span> <span class='hs-varid'>bs</span> <a name="line-79"></a> <span class='hs-varid'>cond</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>t</span> <span class='hs-varop'>==</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>LastBranch</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>LastCondBranch</span> <span class='hs-varid'>p</span> <span class='hs-varid'>t</span> <span class='hs-varid'>f</span> <a name="line-80"></a> <span class='hs-varid'>exp</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmStackSlot</span> <span class='hs-layout'>(</span><span class='hs-conid'>CallArea</span> <span class='hs-layout'>(</span><span class='hs-conid'>Young</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>off</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-81"></a> <span class='hs-conid'>CmmStackSlot</span> <span class='hs-layout'>(</span><span class='hs-conid'>CallArea</span> <span class='hs-layout'>(</span><span class='hs-conid'>Young</span> <span class='hs-layout'>(</span><span class='hs-varid'>sub</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>off</span> <a name="line-82"></a> <span class='hs-varid'>exp</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmBlock</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>CmmLit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmBlock</span> <span class='hs-layout'>(</span><span class='hs-varid'>sub</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-83"></a> <span class='hs-varid'>exp</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span> <a name="line-84"></a> <span class='hs-varid'>sub</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupBid</span> <span class='hs-varid'>subst</span> <a name="line-85"></a> <a name="line-86"></a><a name="hash_block"></a><span class='hs-comment'>-- To speed up comparisons, we hash each basic block modulo labels.</span> <a name="line-87"></a><span class='hs-comment'>-- The hashing is a bit arbitrary (the numbers are completely arbitrary),</span> <a name="line-88"></a><span class='hs-comment'>-- but it should be fast and good enough.</span> <a name="line-89"></a><span class='hs-definition'>hash_block</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmBlock</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <a name="line-90"></a><span class='hs-definition'>hash_block</span> <span class='hs-layout'>(</span><span class='hs-conid'>Block</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-91"></a> <span class='hs-varid'>fromIntegral</span> <span class='hs-layout'>(</span><span class='hs-varid'>hash_tail</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word32</span><span class='hs-layout'>)</span> <span class='hs-varop'>.&.</span> <span class='hs-layout'>(</span><span class='hs-num'>0x7fffffff</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Word32</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-92"></a> <span class='hs-comment'>-- UniqFM doesn't like negative Ints</span> <a name="line-93"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>hash_mid</span> <span class='hs-layout'>(</span><span class='hs-conid'>MidComment</span> <span class='hs-layout'>(</span><span class='hs-conid'>FastString</span> <span class='hs-varid'>u</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cvt</span> <span class='hs-varid'>u</span> <a name="line-94"></a> <span class='hs-varid'>hash_mid</span> <span class='hs-layout'>(</span><span class='hs-conid'>MidAssign</span> <span class='hs-varid'>r</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_reg</span> <span class='hs-varid'>r</span> <span class='hs-varop'>+</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <a name="line-95"></a> <span class='hs-varid'>hash_mid</span> <span class='hs-layout'>(</span><span class='hs-conid'>MidStore</span> <span class='hs-varid'>e</span> <span class='hs-varid'>e'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <span class='hs-varop'>+</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e'</span> <a name="line-96"></a> <span class='hs-varid'>hash_mid</span> <span class='hs-layout'>(</span><span class='hs-conid'>MidForeignCall</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_tgt</span> <span class='hs-varid'>t</span> <span class='hs-varop'>+</span> <span class='hs-varid'>hash_lst</span> <span class='hs-varid'>hash_e</span> <span class='hs-keyword'>as</span> <a name="line-97"></a> <span class='hs-varid'>hash_reg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmReg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word32</span> <a name="line-98"></a> <span class='hs-varid'>hash_reg</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLocal</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_local</span> <span class='hs-varid'>l</span> <a name="line-99"></a> <span class='hs-varid'>hash_reg</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmGlobal</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>19</span> <a name="line-100"></a> <span class='hs-varid'>hash_local</span> <span class='hs-layout'>(</span><span class='hs-conid'>LocalReg</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>117</span> <a name="line-101"></a> <span class='hs-varid'>hash_e</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmExpr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word32</span> <a name="line-102"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLit</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_lit</span> <span class='hs-varid'>l</span> <a name="line-103"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLoad</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>67</span> <span class='hs-varop'>+</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <a name="line-104"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmReg</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_reg</span> <span class='hs-varid'>r</span> <a name="line-105"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmMachOp</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>es</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_lst</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>es</span> <span class='hs-comment'>-- pessimal - no operator check</span> <a name="line-106"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmRegOff</span> <span class='hs-varid'>r</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_reg</span> <span class='hs-varid'>r</span> <span class='hs-varop'>+</span> <span class='hs-varid'>cvt</span> <span class='hs-varid'>i</span> <a name="line-107"></a> <span class='hs-varid'>hash_e</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmStackSlot</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>13</span> <a name="line-108"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CmmLit</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Word32</span> <a name="line-109"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmInt</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varid'>i</span> <a name="line-110"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmFloat</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>truncate</span> <span class='hs-varid'>r</span> <a name="line-111"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLabel</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>119</span> <span class='hs-comment'>-- ugh</span> <a name="line-112"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLabelOff</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cvt</span> <span class='hs-varop'>$</span> <span class='hs-num'>199</span> <span class='hs-varop'>+</span> <span class='hs-varid'>i</span> <a name="line-113"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmLabelDiffOff</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cvt</span> <span class='hs-varop'>$</span> <span class='hs-num'>299</span> <span class='hs-varop'>+</span> <span class='hs-varid'>i</span> <a name="line-114"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmBlock</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>191</span> <span class='hs-comment'>-- ugh</span> <a name="line-115"></a> <span class='hs-varid'>hash_lit</span> <span class='hs-layout'>(</span><span class='hs-conid'>CmmHighStackMark</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>cvt</span> <span class='hs-num'>313</span> <a name="line-116"></a> <span class='hs-varid'>hash_tgt</span> <span class='hs-layout'>(</span><span class='hs-conid'>ForeignTarget</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <a name="line-117"></a> <span class='hs-varid'>hash_tgt</span> <span class='hs-layout'>(</span><span class='hs-conid'>PrimTarget</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>31</span> <span class='hs-comment'>-- lots of these</span> <a name="line-118"></a> <span class='hs-varid'>hash_lst</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>z</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varop'>+</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-keyglyph'>::</span><span class='hs-conid'>Word32</span><span class='hs-layout'>)</span> <a name="line-119"></a> <span class='hs-varid'>hash_last</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastBranch</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>23</span> <span class='hs-comment'>-- would be great to hash these properly</span> <a name="line-120"></a> <span class='hs-varid'>hash_last</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCondBranch</span> <span class='hs-varid'>p</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>p</span> <a name="line-121"></a> <span class='hs-varid'>hash_last</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCall</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <a name="line-122"></a> <span class='hs-varid'>hash_last</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastSwitch</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_e</span> <span class='hs-varid'>e</span> <a name="line-123"></a> <span class='hs-varid'>hash_tail</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-conid'>LastExit</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>29</span> <span class='hs-varop'>+</span> <span class='hs-varid'>v</span> <span class='hs-varop'>`shiftL`</span> <span class='hs-num'>1</span> <a name="line-124"></a> <span class='hs-varid'>hash_tail</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastOther</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_last</span> <span class='hs-varid'>l</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span> <span class='hs-varop'>`shiftL`</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <a name="line-125"></a> <span class='hs-varid'>hash_tail</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZTail</span> <span class='hs-varid'>m</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hash_tail</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>hash_mid</span> <span class='hs-varid'>m</span> <span class='hs-varop'>+</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span> <span class='hs-varop'>`shiftL`</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-126"></a> <span class='hs-varid'>cvt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromInteger</span> <span class='hs-varop'>.</span> <span class='hs-varid'>toInteger</span> <a name="line-127"></a><span class='hs-comment'>-- Utilities: equality and substitution on the graph.</span> <a name="line-128"></a> <a name="line-129"></a><a name="eqBid"></a><span class='hs-comment'>-- Given a map ``subst'' from BlockID -> BlockID, we define equality.</span> <a name="line-130"></a><span class='hs-definition'>eqBid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BidMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-131"></a><span class='hs-definition'>eqBid</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <span class='hs-varid'>bid'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupBid</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <span class='hs-varop'>==</span> <span class='hs-varid'>lookupBid</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid'</span> <a name="line-132"></a><a name="lookupBid"></a><span class='hs-definition'>lookupBid</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>BidMap</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <a name="line-133"></a><span class='hs-definition'>lookupBid</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookupBlockEnv</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <span class='hs-keyword'>of</span> <a name="line-134"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>bid</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lookupBid</span> <span class='hs-varid'>subst</span> <span class='hs-varid'>bid</span> <a name="line-135"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>bid</span> <a name="line-136"></a> <a name="line-137"></a><a name="eqBlockBodyWith"></a><span class='hs-comment'>-- Equality on the body of a block, modulo a function mapping block IDs to block IDs.</span> <a name="line-138"></a><span class='hs-definition'>eqBlockBodyWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmBlock</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmBlock</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-139"></a><span class='hs-definition'>eqBlockBodyWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Block</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Block</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eqTailWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span> <a name="line-140"></a> <a name="line-141"></a><a name="CmmTail"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CmmTail</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ZTail</span> <span class='hs-conid'>Middle</span> <span class='hs-conid'>Last</span> <a name="line-142"></a><a name="eqTailWith"></a><span class='hs-definition'>eqTailWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmTail</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmmTail</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-143"></a><span class='hs-definition'>eqTailWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZTail</span> <span class='hs-varid'>m</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZTail</span> <span class='hs-varid'>m'</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varop'>==</span> <span class='hs-varid'>m'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqTailWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span> <a name="line-144"></a><span class='hs-definition'>eqTailWith</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-conid'>LastExit</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-conid'>LastExit</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span> <a name="line-145"></a><span class='hs-definition'>eqTailWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastOther</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>ZLast</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastOther</span> <span class='hs-varid'>l'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eqLastWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>l</span> <span class='hs-varid'>l'</span> <a name="line-146"></a><span class='hs-definition'>eqTailWith</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> <a name="line-147"></a> <a name="line-148"></a><a name="eqLastWith"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>BlockId</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Last</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Last</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-149"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastBranch</span> <span class='hs-varid'>bid1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastBranch</span> <span class='hs-varid'>bid2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>bid1</span> <span class='hs-varid'>bid2</span> <a name="line-150"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCondBranch</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>f1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCondBranch</span> <span class='hs-varid'>c2</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>f2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-151"></a> <span class='hs-varid'>c1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>c2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>f1</span> <span class='hs-varid'>f2</span> <a name="line-152"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCall</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>a1</span> <span class='hs-varid'>r1</span> <span class='hs-varid'>u1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastCall</span> <span class='hs-varid'>t2</span> <span class='hs-varid'>c2</span> <span class='hs-varid'>a2</span> <span class='hs-varid'>r2</span> <span class='hs-varid'>u2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-153"></a> <span class='hs-varid'>t1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>t2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqMaybeWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-varid'>c1</span> <span class='hs-varid'>c2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>a1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>a2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>r1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>r2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>u1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>u2</span> <a name="line-154"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-varid'>eqBid</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastSwitch</span> <span class='hs-varid'>e1</span> <span class='hs-varid'>bs1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>LastSwitch</span> <span class='hs-varid'>e2</span> <span class='hs-varid'>bs2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <a name="line-155"></a> <span class='hs-varid'>e1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>e2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>eqLstWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>eqMaybeWith</span> <span class='hs-varid'>eqBid</span><span class='hs-layout'>)</span> <span class='hs-varid'>bs1</span> <span class='hs-varid'>bs2</span> <a name="line-156"></a><span class='hs-definition'>eqLastWith</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> <a name="line-157"></a> <a name="line-158"></a><a name="eqLstWith"></a><span class='hs-definition'>eqLstWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>b</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-159"></a><span class='hs-definition'>eqLstWith</span> <span class='hs-varid'>eltEq</span> <span class='hs-varid'>es</span> <span class='hs-varid'>es'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>all</span> <span class='hs-layout'>(</span><span class='hs-varid'>uncurry</span> <span class='hs-varid'>eltEq</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>List</span><span class='hs-varop'>.</span><span class='hs-varid'>zip</span> <span class='hs-varid'>es</span> <span class='hs-varid'>es'</span><span class='hs-layout'>)</span> <a name="line-160"></a> <a name="line-161"></a><a name="eqMaybeWith"></a><span class='hs-definition'>eqMaybeWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <a name="line-162"></a><span class='hs-definition'>eqMaybeWith</span> <span class='hs-varid'>eltEq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>eltEq</span> <span class='hs-varid'>e</span> <span class='hs-varid'>e'</span> <a name="line-163"></a><span class='hs-definition'>eqMaybeWith</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span> <a name="line-164"></a><span class='hs-definition'>eqMaybeWith</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span> </pre></body> </html>
