[Bug bootstrap/61442] New: [Aarch64] ICE while bootstraping GCC with --with-build-config=bootstrap-lto

["venkataramanan.kumar at amd dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61442

            Bug ID: 61442
           Summary: [Aarch64] ICE while bootstraping GCC with
                    --with-build-config=bootstrap-lto
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: venkataramanan.kumar at amd dot com

Machine: Aarch64 
Build Config line: 

./gcc/configure --prefix=/work/GCC_Team/vekumar/ltoinstall/
--with-gmp=/work/GCC_Team/vekumar/installpre/installdir/
--with-build-config=bootstrap-lto
--with-mpfr=/work/GCC_Team/vekumar/installpre/installdir/
--with-mpc=/work/GCC_Team/vekumar/installpre/installdir/ --disable-werror
--enable-languages=c,c++,fortran

(---Snip---)
/root/work/GCC_Team/vekumar/ltobuild/./gcc/xgcc
-B/root/work/GCC_Team/vekumar/ltobuild/./gcc/
-B/work/GCC_Team/vekumar/ltoinstall/aarch64-unknown-linux-gnu/bin/
-B/work/GCC_Team/vekumar/ltoinstall/aarch64-unknown-linux-gnu/lib/ -isystem
/work/GCC_Team/vekumar/ltoinstall/aarch64-unknown-linux-gnu/include -isystem
/work/GCC_Team/vekumar/ltoinstall/aarch64-unknown-linux-gnu/sys-include    -g
-O2 -O2  -g -O2 -DIN_GCC    -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -fPIC -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector  
-fPIC -I. -I. -I../.././gcc -I../../../gcc/libgcc -I../../../gcc/libgcc/.
-I../../../gcc/libgcc/../gcc -I../../../gcc/libgcc/../include    -o _cmpdi2.o
-MT _cmpdi2.o -MD -MP -MF _cmpdi2.dep -DL_cmpdi2 -c
../../../gcc/libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
../../../gcc/libgcc/libgcc2.c: In function Ã__ashrti3Ã:
../../../gcc/libgcc/libgcc2.c: In function Ã__lshrti3Ã:
../../../gcc/libgcc/libgcc2.c:415:30: internal compiler error: in
iterative_hash_expr, at tree.c:7475
       w.s.low = (UWtype) uu.s.high >> -bm;
                              ^
../../../gcc/libgcc/libgcc2.c:471:22: internal compiler error: in
iterative_hash_expr, at tree.c:7475
       w.s.high = uu.s.high >> (W_TYPE_SIZE - 1);
                      ^
../../../gcc/libgcc/libgcc2.c: In function Ã__negti2Ã:
In file included from ../../../gcc/libgcc/libgcc2.h:506:0,
                 from ../../../gcc/libgcc/libgcc2.c:56:
../../../gcc/libgcc/libgcc2.c: In function Ã__multi3Ã:
../../../gcc/libgcc/libgcc2.c:67:36: internal compiler error: in
iterative_hash_expr, at tree.c:7475
   const DWunion w = { {.low = -uu.s.low,
                                    ^
../../../gcc/libgcc/libgcc2.c: In function Ã__cmpti2Ã:
../../../gcc/libgcc/libgcc2.c:551:39: internal compiler error: in
iterative_hash_expr, at tree.c:7475
   DWunion w = {.ll = __umulsidi3 (uu.s.low, vv.s.low)};
(---Snip---)

With GCC 4.9 release FSF, getting bootstrapping with LTO resulted compare
errors. Finding the revision, which cause ICE is in progress.