[Bug middle-end/44071] ICE with asm goto and __builtin_unreachable()

[jakub at gcc dot gnu dot org]

------- Comment #12 from jakub at gcc dot gnu dot org  2010-05-11 18:23 -------
Subject: Bug 44071

Author: jakub
Date: Tue May 11 18:22:52 2010
New Revision: 159289

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=159289
Log:
        PR middle-end/44071
        * cfglayout.c (fixup_reorder_chain): Allow asm goto to have
        no fallthru edge.
        * cfgcleanup.c (try_optimize_cfg): When in cfglayout mode
        optimizing away empty bb with no successors, move over its
        footer chain to fallthru predecessor.
        * cfgrtl.c (patch_jump_insn): Update also REG_LABEL_OPERAND.
        (rtl_split_edge): For asm goto call patch_jump_insn even if
        splitting fallthru edge.

        * c-c++-common/asmgoto-4.c: New test.
        * gcc.target/i386/pr44071.c: New test.

Added:
    branches/gcc-4_5-branch/gcc/testsuite/c-c++-common/asmgoto-4.c
    branches/gcc-4_5-branch/gcc/testsuite/gcc.target/i386/pr44071.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/cfgcleanup.c
    branches/gcc-4_5-branch/gcc/cfglayout.c
    branches/gcc-4_5-branch/gcc/cfgrtl.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44071