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rtl.h (LCT_NORETURN): New.

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* rtl.h (LCT_NORETURN): New.
        * calls.c (emit_library_call_value_1): Handle it.

From-SVN: r40897
This commit is contained in:
Richard Henderson 2001-03-27 19:35:05 -08:00 committed by Richard Henderson
parent 3d74dad834
commit 695ee791dc
3 changed files with 38 additions and 1 deletions
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3
gcc/ChangeLog
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@ -3,6 +3,9 @@
* function.c (expand_function_start): Set DECL_REGISTER on
a pseudo used for DECL_RESULT.
* rtl.h (LCT_NORETURN): New.
* calls.c (emit_library_call_value_1): Handle it.
2001-03-27 Stan Shebs <shebs@apple.com>
* objc/objc-act.c (objc_init): Use dump_base_name.

33
gcc/calls.c
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@ -3504,6 +3504,7 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
int flags = 0;
int reg_parm_stack_space = 0;
int needed;
rtx before_call;
#ifdef REG_PARM_STACK_SPACE
/* Define the boundary of the register parm stack space that needs to be
@ -3528,6 +3529,8 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
flags |= ECF_CONST;
else if (fn_type == LCT_PURE_MAKE_BLOCK)
flags |= ECF_PURE;
else if (fn_type == LCT_NORETURN)
flags |= ECF_NORETURN;
fun = orgfun;
if (libfunc_nothrow (fun))
@ -4041,6 +4044,8 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
abort ();
#endif
before_call = get_last_insn ();
/* We pass the old value of inhibit_defer_pop + 1 to emit_call_1, which
will set inhibit_defer_pop to that value. */
/* The return type is needed to decide how many bytes the function pops.
@ -4058,6 +4063,34 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
valreg,
old_inhibit_defer_pop + 1, call_fusage, flags);
/* For calls to `setjmp', etc., inform flow.c it should complain
if nonvolatile values are live. For functions that cannot return,
inform flow that control does not fall through. */
if (flags & (ECF_RETURNS_TWICE | ECF_NORETURN | ECF_LONGJMP))
{
/* The barrier or NOTE_INSN_SETJMP note must be emitted
immediately after the CALL_INSN. Some ports emit more than
just a CALL_INSN above, so we must search for it here. */
rtx last = get_last_insn ();
while (GET_CODE (last) != CALL_INSN)
{
last = PREV_INSN (last);
/* There was no CALL_INSN? */
if (last == before_call)
abort ();
}
if (flags & ECF_RETURNS_TWICE)
{
emit_note_after (NOTE_INSN_SETJMP, last);
current_function_calls_setjmp = 1;
}
else
emit_barrier_after (last);
}
/* Now restore inhibit_defer_pop to its actual original value. */
OK_DEFER_POP;

3
gcc/rtl.h
View File

@ -1972,7 +1972,8 @@ enum libcall_type
LCT_CONST = 1,
LCT_PURE = 2,
LCT_CONST_MAKE_BLOCK = 3,
LCT_PURE_MAKE_BLOCK = 4
LCT_PURE_MAKE_BLOCK = 4,
LCT_NORETURN = 5
};
extern void emit_library_call PARAMS ((rtx, enum libcall_type,