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* Chapter renumber, and split ch 17Cliff Click12 days26-0/+1770
| | | | | | Renumber chapters 10a, 10b, 11, 12, 13, 14 -> 10, 11, 13, 12, [11,14]. Split ch 17 into a 17a and 17b; shuffle around im/mutable syntax to be consistent, and present it more slowly. THe new immutable syntax is pushed through all later chapters
* Squashed commit of the following:Cliff Click2026-09-2913-2345/+0
| | | | | | | | | | | | | | | | | | | | | | commit 3ba6686fc991998a0a420709dfb0012bbddf77ab Author: Cliff Click <cliffc@acm.org> Date: Tue Sep 29 12:21:46 2026 -0700 Backport lazy memory splits to ch10, split into ch10a and b commit fa7d56f72455828826d0ab7e1c142ca814e6e2aa Author: Cliff Click <cliffc@acm.org> Date: Tue Sep 29 10:10:53 2026 -0700 Reverse edges commit e1bba17ff54400a34ede0eaacad863420d021119 Author: Cliff Click <cliffc@acm.org> Date: Tue Sep 29 09:44:41 2026 -0700 Split ch10 Basic memory introduction in 10a, then precise aliases in 10b.
* Add shared graph viewer to all chaptersCliff Click2026-09-221-4/+0
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* More lattice docs reworksCliff Click2025-01-152-347/+301
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* Upgrades to the Type lattice diagramsCliff Click2025-01-152-586/+676
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* more grammar cleanupCliff Click2024-10-131-1/+1
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* Fix grammar and forward-port minor changes (#91)Thalia Archibald2024-07-011-0/+1
| | | | | | | | | | | | | | | * Backport test exception handling to chapter 1 * Add unary ! to chapter 10 and 11 grammars * Lex { } ! as punctuation * Forward-port format whitespace * Forward-port test organization * Forward-port replace build-graphs.sh with Makefile * Add chapter title to chapter 11
* Backport tests (#87)Thalia Archibald2024-06-212-5/+12
| | | | | | | | | | | | | | | | | * Fix unexpected number parse errors * Add chapter titles * Split test files by chapter * Backport rename Fuzzer08Test to FuzzerWrap * Replace graph build scripts with Makefile * Backport Chapter05Test.testRegress1 * Backport require space after 'return' * Backport check EOF after return statement
* Format whitespace (#86)Thalia Archibald2024-06-215-16/+15
| | | | | | | | | * Trim trailing whitespace * Ensure final new lines * Convert line endings from CRLF to LF * Replace tabs with spaces
* Documentation updates (#76)Dibyendu Majumdar2024-05-022-253/+304
| | | | | | | | | | | | | | | | | | * More clearly explain why we do not have an AST in the implementation * Improve the description of type lattice. Cross reference to future chapters. * Minor update * Add lattice visual Revise the text describing meet. * minor update * Add a lattice visual to the text * Update the lattice visual. Add description of the new edges in the SoN graph
* Ch10update (#75)Dibyendu Majumdar2024-04-2810-504/+1020
| | | | | | | | | | | | | | | | | | | | | * Store-after-Store peep * Load-after-Store peephole * Fix graph viz mem edge color bug * Scalar replace loop carried dependence * #67 Dead Not node hanging around - if we add a Not in the upcast then add it to the IterPeeps worklist to ensure it gets cleaned up. We don't see the Not node in the parser hence we cannot do a peep on it there. * #67 Update visuals. Add description of Store-Store and Store-Load peeps. Add examples. * #67 Undo the change that wasn't supposed to be committed! * #67 Update description of the Store-Store and Store-Load peepholes --------- Co-authored-by: Cliff Click <cliffc@acm.org>
* Ch10 (#74)Dibyendu Majumdar2024-04-238-0/+1731
* Chapter 10 start * #67 language grammar for chapter 10 * #67 Fix chapter title * #67 Fix typo * #67 assignment to fields * #67 Struct var decl must be initialized * #67 Start to describe memory and aliasing * #67 revision * #67 Start to describe how we construct the graph * #67 Start to describe how we construct the graph * #67 Start to describe how we construct the graph * #67 Parse struct declaration * #67 WIP parse expressions and statements involving struct vars * #67 WIP parse store expressions * #67 WIP parse load expressions * #67 WIP first go at adding aliases and memslices * #67 WIP A store should get bound to the $mem alias replacing previous node * #67 WIP Add MergeMem node * Update script generator to new features (#68) * #67 WIP Drop MergeMem node * #67 WIP Drop MergeMem node * #67 WIP Improve parsing of postfix expressions * #67 WIP Improve parsing of postfix expressions * #67 WIP Update xmeet - these types can only meet another of the same type * #67 WIP Phi's compute should return input type if input is a MemPtr even if region is in progress because parser needs the correct type * #67 WIP If a null meets a non-null ptr then non-null wins; but ideally we want to retain type of null so we do not have this problem * #67 WIP If a null meets a non-null ptr then non-null then the result is type|null * #67 WIP Fix TypeMemPtr.eq() and also intern struct types * #67 WIP Add missing hash and eq implementations Also refactor common code to get field from ptr * #67 Add START as input to New (as proxy for Mem). Other minor adjustments * #67 Phis widen type inside a loop during parse * #67 Fix redeclaration bug * #67 Small refactor * #67 Add an LLVM inspired IR printer based on post by Yasser A * #67 Add instructions to initialize fields of a struct after a new * #67 Make New's ctrl input the current ctrl rather than Start * #67 Refactor to make it cleaner * #67 Fix bug - interned types should be cleared * #67 Fix bug - new node must be kept so that its not prematurely killed * #67 Fix bug - we must do a depp comparison of structs because types get interned and we can't easily clear the interned types across runs, this means we can end up with structs retaining definitions from older runs. * #67 Refactor * #67 When we compute type of a Phi we must stay within the domain of the Phi, Example Int stays Int, Ptr stays Ptr, Control stays Control, Mem stays Mem. To ensure this we need to default to the GLB of the first input * #67 When we compute type of a Phi we must stay within the domain of the Phi, Example Int stays Int, Ptr stays Ptr, Control stays Control, Mem stays Mem. To ensure this we need to default to the GLB of the first input * #67 Tidy up printing and add expected result on tests * #67 Refactor TypeStruct * #67 Refactor TypeStruct When printing IR in new format - show the projection index * #67 Revise the lattice for ptr types to make it more complete * #67 Revise the lattice for mem and struct types. Add initial test * #67 Refactor how we compute phi type * #67 Refactor how we compute phi type * #67 Use the generated graph but an edge is missing in the graph - to be investigated * #67 One more tweek * Partial work on ch10, some tests busted Revamp Types Mem, MemPtr, Struct, FIeld. Add tests to enforce theoretical rules properties., Add parsing "?" to allow nullable types. Enhance GraphViz to show off mem better. Strip trailing WS in many files. * Strip trailing WS * Post-peephole errors Some nicer error reporting for types. Mem Projs following StartNode are indexed by alias, but may have "holes" in the set of projs. * WS cleanup * Simplify TMP dual Add more test type Rename test type so makefile picks it up Failing 1 test * Scopes and Phis track declared type ...not the initial type. * A fuzzer found bug * Some changes on the fuzzer and maybe faster reducer (#69) * WS and printing changes * Kotlin style null checks (partial) Allow `ptr=rand?; if( ptr ) ptr.field` where the if-test upcasts the ptr to not-null. Field assignments are expressions not statements: `if( (ptr.fld=rez) !=null ) .... ` Many WS changes. * missed cleanup * Fuzzer update (#71) * Update script generator * Fix script generator * Reset type cache to prevent alias blowup (#70) * Reset type cache to prevent alias blowup * Remove the default intern Just reset the UNIQUE_ALIAS number. Intern table doesn't care, that's the whole point of the intern table. Passes existing tests, but fuzzer finds some new stuff * Fix a few of the fuzzer bugs More to come * Fix one more fuzzer bug --------- Co-authored-by: Cliff Click <cliffc@acm.org> * Fix script generated generating invalid code * Greatly simplify Cast usage Casts peephole normally. Added needed Phi optimizations to remove excess casts. Fuzzer bug fixes: Need a plain kill unused on worklist. MemOp error handles aTOP/BOT input. * #67 Add description of lattice to the doc Update grammar - add the '?' nullable syntax Rename VOID to PTR * #67 Some renames * #67 some more text re lattice * #67 Fix the alias ID start to 2 * #67 Revise lattice diagram and doc * #67 Start describing the parser changes and Null Pointer analysis * #67 Draw lattice diagram using graphviz * #67 Revisions to text * #67 Improve description of alias classes * #67 Some renames to make code clearer * #67 Describe null pointer analysis * Fix script generated generating invalid code (#72) * updates to readme shorter example names to make a nicer graph * #67 Revise top level README * #67 Revise top level README --------- Co-authored-by: XmiliaH <45106915+XmiliaH@users.noreply.github.com> Co-authored-by: Cliff Click <cliffc@acm.org> Co-authored-by: XmiliaH <xmilia.hermit@gmail.com>
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