https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66978
--- Comment #1 from H.J. Lu <hjl.tools at gmail dot com> --- Created attachment 36042 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36042&action=edit A testcase (gdb) r The program being debugged has been started already. Start it from the beginning? (y or n) y Starting program: /export/build/gnu/gcc/build-x86_64-linux/gcc/cc1 -fpreprocessed x.i -quiet -dumpbase x.i -mx32 -mtune=generic -march=x86-64 -auxbase-strip x.s -O2 -version -o x.s GNU C11 (GCC) version 6.0.0 20150723 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 5.2.1 20150716 (Red Hat 5.2.1-1), GMP version 6.0.0, MPFR version 3.1.2, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 GNU C11 (GCC) version 6.0.0 20150723 (experimental) (x86_64-unknown-linux-gnu) compiled by GNU C version 5.2.1 20150716 (Red Hat 5.2.1-1), GMP version 6.0.0, MPFR version 3.1.2, MPC version 1.0.2 GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096 Compiler executable checksum: 79713220058827192abd81c1ee93d8e2 Breakpoint 1, fancy_abort ( file=0x18c3238 "/export/gnu/import/git/sources/gcc/gcc/expr.c", line=3552, function=0x18c49a8 <emit_move_insn(rtx_def*, rtx_def*)::__FUNCTION__> "emit_move_insn") at /export/gnu/import/git/sources/gcc/gcc/diagnostic.c:1340 1340 internal_error ("in %s, at %s:%d", function, trim_filename (file), line); (gdb) f 2 #2 0x0000000000a55587 in expand_function_start ( subr=<function_decl 0x7ffff13dcd20 hack_digit>) at /export/gnu/import/git/sources/gcc/gcc/function.c:5210 5210 insn = emit_move_insn (local, chain); (gdb) call debug_rtx (chain) (reg:SI 39 r10 [ CHAIN.8 ]) (gdb) call debug_rtx (local) (reg/f:DI 87 [ CHAIN.8 ]) (gdb)
