https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66682
Bug ID: 66682
Summary: Lots of macro expansion, very slow compilation
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: minor
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: cr88192 at gmail dot com
Target Milestone: ---
Created attachment 35857
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35857&action=edit
stand-alone code which demonstrates issue
Some code with large amounts of macro-expansion (and producing a large number
of small functions) takes an inordinate amount of time to compile with GCC (the
example, around 3 minutes with 4.5.2 and 4.5.3, and 8 minutes with 4.8.2).
However, with several other compilers, the same code compiles within a few
seconds.
The code fragment represents part of a native function-call dispatcher
mechanism from an interpreter (a lot of the interpreter is heavily macro'ed
like this, using macros to produce type-specialized versions of operations).
