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ix86 code generation bug -march=pentiumpro
- To: egcs-bugs at cygnus dot com
- Subject: ix86 code generation bug -march=pentiumpro
- From: grahams at rcp dot co dot uk
- Date: Sat, 02 May 1998 13:57:36 GMT
Hi
I've identified an ix86 code generation bug in egcs-19980425 snapshot.
I've been investigating why bootstraping egcs-19980425 with
"CFLAGS=O6 -march=pentiumpro -mcpu=pentiumpro"
aborts during "make compare" due to differences in the
output of the stage1 and stage2 compilers.
I've managed to identify that its the compilation of
init_reg_sets_1() in gcc/regclass.c that results in the
differences.
Attached below is a self contained and cut-down
version of the init_reg_sets_1() routine which can
be used to demonstate the code generation bug.
graham