96 lines
3.2 KiB
Factor
96 lines
3.2 KiB
Factor
USING: assocs compiler.cfg compiler.cfg.builder.blocks
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compiler.cfg.stacks.local compiler.tree help.markup help.syntax literals math
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multiline sequences vectors words ;
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IN: compiler.cfg.builder
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<<
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STRING: ex-emit-call
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USING: compiler.cfg.builder compiler.cfg.builder.blocks compiler.cfg.stacks
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kernel make prettyprint ;
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begin-stack-analysis <basic-block> set-basic-block
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\ dummy 3 [ emit-call ] { } make drop
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height-state basic-block [ get . ] bi@
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{ { 3 0 } { 0 0 } }
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T{ basic-block
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{ id 1903165 }
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{ successors
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V{
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T{ basic-block
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{ id 1903166 }
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{ instructions
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V{
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T{ ##call { word dummy } }
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T{ ##branch }
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}
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}
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{ successors
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V{ T{ basic-block { id 1903167 } } }
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}
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{ kill-block? t }
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}
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}
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}
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}
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;
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STRING: ex-make-input-map
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USING: compiler.cfg.builder prettyprint ;
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T{ #shuffle { in-d { 37 81 92 } } } make-input-map .
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H{
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{ 81 T{ ds-loc { n 1 } } }
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{ 37 T{ ds-loc { n 2 } } }
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{ 92 T{ ds-loc } }
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}
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;
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>>
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HELP: procedures
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{ $var-description "A " { $link vector } " used as temporary storage during cfg construction for all procedures being built." } ;
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HELP: make-input-map
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{ $values { "#shuffle" #shuffle } { "assoc" assoc } }
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{ $description "Creates an " { $link assoc } " that maps input values to the shuffle operation to stack locations." }
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{ $examples { $unchecked-example $[ ex-make-input-map ] } } ;
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HELP: emit-call
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{ $values { "word" word } { "height" number } }
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{ $description "Emits a call to the given word to the " { $link cfg } " being constructed. \"height\" is the number of items being added to or removed from the data stack. Side effects of the word is that it modifies the \"basic-block\" and " { $link height-state } " variables." }
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{ $examples
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"In this example, a call to a dummy word is emitted which pushes three items onto the stack."
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{ $unchecked-example $[ ex-emit-call ] }
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}
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{ $see-also call-height } ;
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HELP: emit-loop-call
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{ $values { "basic-block" basic-block } }
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{ $description "Sets the given block as the successor of the current block. Then ends the block." } ;
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HELP: emit-node
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{ $values { "node" node } }
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{ $description "Emits CFG instructions for the given SSA node." } ;
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HELP: trivial-branch?
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{ $values
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{ "nodes" "a " { $link sequence } " of " { $link node } " instances" }
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{ "value" "the pushed value or " { $link f } }
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{ "?" "a boolean" }
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}
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{ $description "Checks whether nodes is a trivial branch or not. The branch is counted as trivial if all it does is push a literal value on the stack." }
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{ $examples
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{ $example
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"USING: compiler.cfg.builder compiler.tree prettyprint ;"
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"{ T{ #push { literal 25 } } } trivial-branch? . ."
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"t\n25"
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}
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} ;
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HELP: build-cfg
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{ $values { "nodes" sequence } { "word" word } { "procedures" sequence } }
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{ $description "Builds one or more cfgs from the given word." } ;
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ARTICLE: "compiler.cfg.builder"
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"Final stage of compilation generates machine code from dataflow IR"
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"Convert tree SSA IR to CFG IR. The result is not in SSA form; this is constructed later by calling compiler.cfg.ssa.construction:construct-ssa." ;
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ABOUT: "compiler.cfg.builder"
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