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jkmcnk / sx-gcc

The GNU Compiler Collection port to NEC SX CPU architecture.
GNU General Public License v2.0
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arg and frame pointer elimination not implemented #112

Open GoogleCodeExporter opened 8 years ago

GoogleCodeExporter commented 8 years ago 
currently, we do not allow elimination of frame and arg pointer.

allowing it is probably trivial: need to check and possibly fix
ELIMINABLE_REGS, FRAME_POINTER_REQUIRED, CAN_ELIMINATE, and
INITIAL_ELIMINATION_OFFSET.

there is a question whether eliminating arg and frame pointer could break
calling into code compiled by native compiler. calls must use and set $s34
in any case if we want to be able to call into native code. $s3 can
probably be safely eliminated in gcc-generated code.

Original issue reported on code.google.com by jmoc...@gmail.com on 18 Feb 2009 at 10:45

GoogleCodeExporter commented 8 years ago

Original comment by jmoc...@gmail.com on 9 Oct 2009 at 9:31