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Module dmd.backend.cgelem

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

NameDescription
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