[Bug middle-end/43631] var-tracking inserts notes with non-NULL BLOCK_FOR_INSN in between basic blocks

[izamyatin at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43631



Igor Zamyatin <izamyatin at gmail dot com> changed:



           What    |Removed                     |Added

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                 CC|                            |izamyatin at gmail dot com



--- Comment #9 from Igor Zamyatin <izamyatin at gmail dot com> 2012-12-07 
10:11:28 UTC ---

Fix led to bootstrap failure with --with-arch=core2 --with-cpu=atom flags. It

happens for

/export/gnu/import/git/gcc-test-ia32/bld/./gcc/xgcc -shared-libgcc

-B/export/gnu/import/git/gcc-test-ia32/bld/./gcc -nostdinc++

-L/export/gnu/import/git/gcc-test-ia32/bld/i686-linux/libstdc++-v3/src

-L/export/gnu/import/git/gcc-test-ia32/bld/i686-linux/libstdc++-v3/src/.libs

-B/usr/local/i686-linux/bin/ -B/usr/local/i686-linux/lib/ -isystem

/usr/local/i686-linux/include -isystem /usr/local/i686-linux/sys-include

-I/export/gnu/import/git/gcc-test-ia32/src-trunk/libstdc++-v3/../libgcc

-I/export/gnu/import/git/gcc-test-ia32/bld/i686-linux/libstdc++-v3/include/i686-linux

-I/export/gnu/import/git/gcc-test-ia32/bld/i686-linux/libstdc++-v3/include

-I/export/gnu/import/git/gcc-test-ia32/src-trunk/libstdc++-v3/libsupc++

-D_GLIBCXX_SHARED -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi

-fdiagnostics-show-location=once -ffunction-sections -fdata-sections

-frandom-seed=eh_personality.lo -g -O2 -D_GNU_SOURCE -c

../../../../src-trunk/libstdc++-v3/libsupc++/eh_personality.cc  -fPIC -DPIC

-D_GLIBCXX_SHARED -o eh_personality.o



Stack is



0x8b290da distance_non_agu_define_in_bb

    ../../src-trunk/gcc/config/i386/i386.c:16945

0x8b2928f distance_non_agu_define

    ../../src-trunk/gcc/config/i386/i386.c:17003

0x8b2968f ix86_lea_outperforms

    ../../src-trunk/gcc/config/i386/i386.c:17169

0x8b29994 ix86_use_lea_for_mov(rtx_def*, rtx_def**)

    ../../src-trunk/gcc/config/i386/i386.c:17279

0x8c5704c output_78

    ../../src-trunk/gcc/config/i386/i386.md:2191

0x85a6ae7 get_insn_template(int, rtx_def*)

    ../../src-trunk/gcc/final.c:1939

0x85a7ee0 final_scan_insn(rtx_def*, _IO_FILE*, int, int, int*)

    ../../src-trunk/gcc/final.c:2792

0x85a69b1 final(rtx_def*, _IO_FILE*, int)

    ../../src-trunk/gcc/final.c:1908

0x85aa397 rest_of_handle_final

    ../../src-trunk/gcc/final.c:4271

Please submit a full bug report,



Looks like there is some garbage in BLOCK_FOR_INSN field for barrier

instruction...