OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

calls.c (ECF_ALWAYS_RETURN): New constant. 

* calls.c (ECF_ALWAYS_RETURN): New constant.
	(emit_call_1): Add REG_ALWAYS_RETURN note if needed.
	(expand_call): Use LCF_ALWAYS_RETURN for __bb_fork_func.
	(emit_library_call_value_1): Handle LCT_ALWAYS_RETRUN.
	* flow.c (need_fake_edge_p): Handle REG_ALWAYS_RETURN.
	* rtl.c (reg_note_name): New name.
	* rtl.h (enum reg_note): Add REG_ALWAYS_RETURN.

From-SVN: r44722
This commit is contained in:
Jan Hubicka 2001-08-08 21:07:47 +02:00 committed by Jan Hubicka
parent 82423cbad3
commit 9d98f8f9c4
5 changed files with 28 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
gcc/ChangeLog
View File

@ -1,3 +1,13 @@
Wed Aug 8 21:06:43 CEST 2001 Jan Hubicka <jh@suse.cz>
* calls.c (ECF_ALWAYS_RETURN): New constant.
(emit_call_1): Add REG_ALWAYS_RETURN note if needed.
(expand_call): Use LCF_ALWAYS_RETURN for __bb_fork_func.
(emit_library_call_value_1): Handle LCT_ALWAYS_RETRUN.
* flow.c (need_fake_edge_p): Handle REG_ALWAYS_RETURN.
* rtl.c (reg_note_name): New name.
* rtl.h (enum reg_note): Add REG_ALWAYS_RETURN.
2001-08-07 Aldy Hernandez <aldyh@redhat.com>
* config/mips/mips.c (mips_legitimate_address_p): Limit "la" addresses.

11
gcc/calls.c
View File

@ -177,6 +177,8 @@ static int calls_function_1 PARAMS ((tree, int));
/* Nonzero if this is a call to a function that returns with the stack
pointer depressed. */
#define ECF_SP_DEPRESSED 1024
/* Nonzero if this call is known to always return. */
#define ECF_ALWAYS_RETURN 2048
static void emit_call_1 PARAMS ((rtx, tree, tree, HOST_WIDE_INT,
HOST_WIDE_INT, HOST_WIDE_INT, rtx,
@ -609,6 +611,9 @@ emit_call_1 (funexp, fndecl, funtype, stack_size, rounded_stack_size,
if (ecf_flags & ECF_NORETURN)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_NORETURN, const0_rtx,
REG_NOTES (call_insn));
if (ecf_flags & ECF_ALWAYS_RETURN)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_ALWAYS_RETURN, const0_rtx,
REG_NOTES (call_insn));
if (ecf_flags & ECF_RETURNS_TWICE)
REG_NOTES (call_insn) = gen_rtx_EXPR_LIST (REG_SETJMP, const0_rtx,
@ -2594,7 +2599,8 @@ expand_call (exp, target, ignore)
is subject to race conditions, just as with multithreaded
programs. */
emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__bb_fork_func"), 0,
emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__bb_fork_func"),
LCT_ALWAYS_RETURN,
VOIDmode, 0);
}
@ -3546,6 +3552,9 @@ emit_library_call_value_1 (retval, orgfun, value, fn_type, outmode, nargs, p)
case LCT_THROW:
flags = ECF_NORETURN;
break;
case LCT_ALWAYS_RETURN:
flags = ECF_ALWAYS_RETURN;
break;
}
fun = orgfun;

1
gcc/flow.c
View File

@ -2517,6 +2517,7 @@ need_fake_edge_p (insn)
if ((GET_CODE (insn) == CALL_INSN
&& !SIBLING_CALL_P (insn)
&& !find_reg_note (insn, REG_NORETURN, NULL)
&& !find_reg_note (insn, REG_ALWAYS_RETURN, NULL)
&& !CONST_OR_PURE_CALL_P (insn)))
return true;

2
gcc/rtl.c
View File

@ -281,7 +281,7 @@ const char * const reg_note_name[] =
"REG_EXEC_COUNT", "REG_NOALIAS", "REG_SAVE_AREA", "REG_BR_PRED",
"REG_FRAME_RELATED_EXPR", "REG_EH_CONTEXT", "REG_EH_REGION",
"REG_EH_RETHROW", "REG_SAVE_NOTE", "REG_MAYBE_DEAD", "REG_NORETURN",
"REG_NON_LOCAL_GOTO", "REG_SETJMP"
"REG_NON_LOCAL_GOTO", "REG_SETJMP", "REG_ALWAYS_RETURN"
};

8
gcc/rtl.h
View File

@ -566,7 +566,10 @@ enum reg_note
/* This kind of note is generated at each to `setjmp',
and similar functions that can return twice. */
REG_SETJMP
REG_SETJMP,
/* Indicate calls that always returns. */
REG_ALWAYS_RETURN
};
/* The base value for branch probability notes. */
@ -1952,7 +1955,8 @@ enum libcall_type
LCT_CONST_MAKE_BLOCK = 3,
LCT_PURE_MAKE_BLOCK = 4,
LCT_NORETURN = 5,
LCT_THROW = 6
LCT_THROW = 6,
LCT_ALWAYS_RETURN = 7
};
extern void emit_library_call PARAMS ((rtx, enum libcall_type,