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builtins.c (expand_builtin_update_setjmp_buf): New function. 

* builtins.c (expand_builtin_update_setjmp_buf): New function.
	(expand_builtin, case BUILT_IN_UPDATE_SETJMP_BUF): New case.
	* builtins.def (BUILT_IN_UPDATE_SETJMP_BUF): New code.

From-SVN: r81198
This commit is contained in:
Richard Kenner 2004-04-26 18:11:32 +00:00 committed by Richard Kenner
parent 479864fe80
commit 2b92e7f5cd
3 changed files with 55 additions and 0 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2004-04-26 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
* builtins.c (expand_builtin_update_setjmp_buf): New function.
(expand_builtin, case BUILT_IN_UPDATE_SETJMP_BUF): New case.
* builtins.def (BUILT_IN_UPDATE_SETJMP_BUF): New code.
2004-04-26 Paul Brook <paul@codesourcery.com>
* config/arm/arm.c (arm_legitimate_index_p): Correct iwmmxt offsets.

48
gcc/builtins.c
View File

@ -84,6 +84,7 @@ static int apply_result_size (void);
static rtx result_vector (int, rtx);
#endif
static rtx expand_builtin_setjmp (tree, rtx);
static void expand_builtin_update_setjmp_buf (rtx);
static void expand_builtin_prefetch (tree);
static rtx expand_builtin_apply_args (void);
static rtx expand_builtin_apply_args_1 (void);
@ -738,6 +739,40 @@ expand_builtin_longjmp (rtx buf_addr, rtx value)
}
}
/* __builtin_update_setjmp_buf is passed a pointer to an array of five words
(not all will be used on all machines) that was passed to __builtin_setjmp.
It updates the stack pointer in that block to correspond to the current
stack pointer. */
static void
expand_builtin_update_setjmp_buf (rtx buf_addr)
{
enum machine_mode sa_mode = Pmode;
rtx stack_save;
#ifdef HAVE_save_stack_nonlocal
if (HAVE_save_stack_nonlocal)
sa_mode = insn_data[(int) CODE_FOR_save_stack_nonlocal].operand[0].mode;
#endif
#ifdef STACK_SAVEAREA_MODE
sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
#endif
stack_save
= gen_rtx_MEM (sa_mode,
memory_address
(sa_mode,
plus_constant (buf_addr, 2 * GET_MODE_SIZE (Pmode))));
#ifdef HAVE_setjmp
if (HAVE_setjmp)
emit_insn (gen_setjmp ());
#endif
emit_stack_save (SAVE_NONLOCAL, &stack_save, NULL_RTX);
}
/* Expand a call to __builtin_prefetch. For a target that does not support
data prefetch, evaluate the memory address argument in case it has side
effects. */
@ -5621,6 +5656,19 @@ expand_builtin (tree exp, rtx target, rtx subtarget, enum machine_mode mode,
return const0_rtx;
}
/* This updates the setjmp buffer that is its argument with the value
of the current stack pointer. */
case BUILT_IN_UPDATE_SETJMP_BUF:
if (validate_arglist (arglist, POINTER_TYPE, VOID_TYPE))
{
rtx buf_addr
= expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
expand_builtin_update_setjmp_buf (buf_addr);
return const0_rtx;
}
break;
case BUILT_IN_TRAP:
expand_builtin_trap ();
return const0_rtx;

1
gcc/builtins.def
View File

@ -598,6 +598,7 @@ DEF_EXT_LIB_BUILTIN (BUILT_IN_STRFMON, "strfmon", BT_FN_SSIZE_STRING_SIZE_CON
DEF_LIB_BUILTIN (BUILT_IN_STRFTIME, "strftime", BT_FN_SIZE_STRING_SIZE_CONST_STRING_CONST_PTR, ATTR_FORMAT_STRFTIME_3_0)
DEF_GCC_BUILTIN (BUILT_IN_TRAP, "trap", BT_FN_VOID, ATTR_NORETURN_NOTHROW_LIST)
DEF_GCC_BUILTIN (BUILT_IN_UNWIND_INIT, "unwind_init", BT_FN_VOID, ATTR_NULL)
DEF_GCC_BUILTIN (BUILT_IN_UPDATE_SETJMP_BUF, "update_setjmp_buf", BT_FN_VOID_PTR_INT, ATTR_NULL)
DEF_GCC_BUILTIN (BUILT_IN_VA_COPY, "va_copy", BT_FN_VOID_VALIST_REF_VALIST_ARG, ATTR_NULL)
DEF_GCC_BUILTIN (BUILT_IN_VA_END, "va_end", BT_FN_VOID_VALIST_REF, ATTR_NULL)
DEF_GCC_BUILTIN (BUILT_IN_VA_START, "va_start", BT_FN_VOID_VALIST_REF_VAR, ATTR_NULL)