Marcel Taeumel uploaded a new version of Compiler to project The Trunk: http://source.squeak.org/trunk/Compiler-mt.405.mcz
==================== Summary ====================
Name: Compiler-mt.405 Author: mt Time: 24 July 2019, 11:17:04.167109 am UUID: 7354b36e-2509-4f23-b110-1b9cfe0310d2 Ancestors: Compiler-mt.404
Adds message to avoid costly byte-code scanning for has-literal checks.
Note that ((... or: [...]) or: [...] ...) is a little bit faster to evaluate to false than (... or: [ ... or: [ ... ] ] ). I would suspect not but deeply nested blocks seem to have an interesting effect here.
=============== Diff against Compiler-mt.404 ===============
Item was added: + ----- Method: BytecodeEncoder class>>canBeSpecialLiteral: (in category 'testing') ----- + canBeSpecialLiteral: aLiteral + "This check can be used to prevent unnecessary use of #scanBlockOrNilForLiteral:. For performance, this method summarizes specializations from all known bytecode encoders. It is not meant to be refined per encoder." + + ^ ((((((aLiteral isSymbol and: [Smalltalk specialSelectors includes: aLiteral]) + or: [aLiteral isInteger and: [aLiteral between: -32768 and: 32767]]) + or: [aLiteral isCharacter and: [aLiteral asInteger <= 65535]]) + or: [aLiteral == true]) + or: [aLiteral == false]) + or: [aLiteral == nil])!
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