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Module `dmd.backend.cgelem`

Local optimizations of elem trees

Compiler implementation of the D programming language.

Does strength reduction optimizations on the elem trees, i.e. rewriting trees to less expensive trees.

Documentation

https://dlang.org/phobos/dmd_backend_cgelem.html

Coverage

https://codecov.io/gh/dlang/dmd/src/master/src/dmd/backend/cgelem.d Add coverage tests to https://github.com/dlang/dmd/blob/master/test/runnable/testcgelem.d

Functions

Name	Description
`doptelem(e, goal)`	Optimize and canonicalize an expression tree. Fiddle with double operators so that the rvalue is a pointer (this is needed by the 8086 code generator).
`elddtor(e, goal)`	Handle OPddtor
`elemisnegone(e)`
`elemisone(e)`
`elmsw(e, goal)`	Handle OPmsw.
`elpair(e, goal)`	Handle OPpair, OPrpair.
`elstruct(e, goal)`	See if we can replace struct operations with simpler ones. For OPstreq and OPstrpar.
`fillinops(ops, opsi, maxops, oper, e)`	Fill in ops[maxops] with operands of repeated operator oper.
`postoptelem(e)`	Do optimizations after bltailrecursion() and before common subexpressions.
`swaprel(op)`	Swap relational operators (like if we swapped the leaves).

Authors

Walter Bright

License

Boost License 1.0