Hi, I identified the patch that causes the Ada bootstrap
failure on x86 and x86_64 (at least):
../../xgcc -B../../ -c -g -O2 -fPIC -W -Wall -gnatpg s-stratt.adb -o
s-stratt.o
+===========================GNAT BUG DETECTED==============================+
| 4.0.0 20041123 (experimental) (i686-pc-linux-gnu) GCC error: |
| in gen_lowpart_general, at rtlhooks.c:58 |
| Error detected at s-stratt.adb:671:1 |
works: cvs up -D "2004/11/24 00:06:17 UTC"
breaks: cvs up -D "2004/11/24 00:10:17 UTC"
date: 2004/11/24 00:08:17; author: rth; state: Exp; lines: +11 -0
* rtl.h (validate_subreg): Declare.
* emit-rtl.c (validate_subreg): New.
(gen_rtx_SUBREG): Use it.
* simplify-rtx.c (simplify_subreg): Likewise.
(simplify_gen_subreg): Likewise. Remove duplicate asserts.
* expr.c (emit_move_insn_1): Tidy complex move code. Use memory
fallback whenever gen_realpart/gen_imagpart would not be able to
create SUBREGs.
--
Summary: Ada boostrap broken
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P2
Component: ada
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: laurent at guerby dot net
CC: gcc-bugs at gcc dot gnu dot org,laurent at guerby dot
net,rth at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18685
