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| author | Richard Henderson <rth@redhat.com> | 2000-12-20 17:11:31 -0800 |
|---|---|---|
| committer | Richard Henderson <rth@gcc.gnu.org> | 2000-12-20 17:11:31 -0800 |
| commit | 4b01bd1658cc87a0d9a674606b4ae78a3b4594fe (patch) | |
| tree | ffba52aed7e19dec753b233566b9ab484e11d29e /gcc/builtins.c | |
| parent | 1e248ee3875e64165a8a5c928e175603be975ffa (diff) | |
| download | gcc-4b01bd1658cc87a0d9a674606b4ae78a3b4594fe.zip gcc-4b01bd1658cc87a0d9a674606b4ae78a3b4594fe.tar.gz gcc-4b01bd1658cc87a0d9a674606b4ae78a3b4594fe.tar.bz2 | |
rtl.h (REG_NON_LOCAL_GOTO): New.
* rtl.h (REG_NON_LOCAL_GOTO): New.
* rtl.c (reg_note_name): Update.
* stmt.c (expand_goto): Emit a REG_NON_LOCAL_GOTO note.
* builtins.c (expand_builtin_longjmp): Likewise.
* flow.c (make_edges): Check for REG_NON_LOCAL_GOTO and do
not emit an edge.
From-SVN: r38408
Diffstat (limited to 'gcc/builtins.c')
| -rw-r--r-- | gcc/builtins.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/gcc/builtins.c b/gcc/builtins.c index cbf9acd..3d74681 100644 --- a/gcc/builtins.c +++ b/gcc/builtins.c @@ -649,7 +649,7 @@ void expand_builtin_longjmp (buf_addr, value) rtx buf_addr, value; { - rtx fp, lab, stack; + rtx fp, lab, stack, insn; enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL); if (setjmp_alias_set == -1) @@ -706,6 +706,18 @@ expand_builtin_longjmp (buf_addr, value) emit_indirect_jump (lab); } } + + /* Search backwards and mark the jump insn as a non-local goto. + Note that this precludes the use of __builtin_longjmp to a + __builtin_setjmp target in the same function. However, we've + already cautioned the user that these functions are for + internal exception handling use only. */ + for (insn = get_last_insn (); + GET_CODE (insn) != JUMP_INSN; + insn = PREV_INSN (insn)) + continue; + REG_NOTES (insn) = alloc_EXPR_LIST (REG_NON_LOCAL_GOTO, const0_rtx, + REG_NOTES (insn)); } /* Get a MEM rtx for expression EXP which is the address of an operand |