[Bug bootstrap/50686] [4.7 regression] IRIX 6.5 bootstrap failure: ICE in in lookup_cfa_1, at dwarf2cfi.c:595

["ro at CeBiTec dot Uni-Bielefeld.DE" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50686

--- Comment #17 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot Uni-Bielefeld.DE> 2011-10-18 15:37:49 UTC ---
> --- Comment #16 from Bernd Schmidt <bernds at gcc dot gnu.org> 2011-10-17 17:37:11 UTC ---
> Sorry, I was being imprecise - only the instances where we generate notes 374
> and 375 are interesting. Can you identify these two?

Sorry for being dense :-)  I could using conditional breakpoints once I
had unraveled how to identify the note number from an rtx.  Here's what
I found:

note 374:

(note 229 161 230 NOTE_INSN_EPILOGUE_BEG)
(code_label 243 324 162 31 "" [1 uses])
        .cfi_def_cfa 29, 80
        .cfi_offset 16, -72
        .cfi_offset 17, -64
        .cfi_offset 18, -56
        .cfi_offset 19, -48
        .cfi_offset 20, -40
        .cfi_offset 21, -32
        .cfi_offset 22, -24
        .cfi_offset 28, -16
        .cfi_offset 64, -8

note 375:

(note 229 161 230 NOTE_INSN_EPILOGUE_BEG)
(code_label 243 324 375 31 "" [1 uses])
        .cfi_def_cfa 29, 80
        .cfi_offset 16, -72
        .cfi_offset 17, -64
        .cfi_offset 18, -56
        .cfi_offset 19, -48
        .cfi_offset 20, -40
        .cfi_offset 21, -32
        .cfi_offset 22, -24
        .cfi_offset 28, -16
        .cfi_offset 64, -8

    Rainer