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Virgin import of the GCC 2.95.3 compilers

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This commit is contained in:
David E. O'Brien 2001-03-19 19:46:16 +00:00
parent c4ac962157
commit 843b04fb90
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/vendor/gcc/dist/; revision=74473
13 changed files with 124 additions and 156 deletions
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29
contrib/gcc/ChangeLog
View File

@ -1,3 +1,32 @@
Fri Mar 16 12:46:19 GMT 2001 Bernd Schmidt (bernds@redhat.com)
* gcc-2.95.3 Released.
2001-03-12 Kazu Hirata <kazu@hxi.com>
* config/h8300/h8300.md (movsi_h8300hs): Split the 2nd alternative
into two parts.
2001-03-12 Bernd Schmidt <bernds@redhat.co.uk>
* version.c: Bump.
* final.c (alter_subreg): Use plus_constant_for_output to match
what offsettable_address_p does.
2001-02-19 Bernd Schmidt <bernds@redhat.co.uk>
* version.c: Bump.
Back out sjlj eh fixes.
* varasm.c (force_const_mem): Revert previous change.
* except.c (receive_exception_label, start_dynamic_handler):
Likewise.
* expr.c (expand_builtin_setjmp, expand_builtin_setjmp_setup,
expand_builtin_setjmp_receiver, expand_builtin): Likewise.
* expr.h (expand_builtin_setjmp, expand_builtin_setjmp_receiver):
Likewise.
2001-01-25 Bernd Schmidt <bernds@redhat.co.uk>
* version.c: Bump.

17
contrib/gcc/NEWS
View File

@ -9,10 +9,10 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.3.html
GCC 2.95.3
January 11, 2001
March 16, 2001
The GNU project and the GCC developers are pleased to announce the
prerelease of GCC version 2.95.3. GCC used to stand for the GNU C
release of GCC version 2.95.3. GCC used to stand for the GNU C
Compiler, but since the compiler supports several other languages
aside from C, it now stands for the GNU Compiler Collection.
@ -24,7 +24,6 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.3.html
the register reloading code.
+ Fix numerous problems that caused incorrect optimization in
the loop optimizer.
+ Fix setjmp/longjmp based exception handling.
+ Fix aborts in the functions build_insn_chain and scan_loops
under some circumstances.
+ Fix an alias analysis bug.
@ -77,7 +76,7 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.3.html
[15]The GCC team
Last modified 2001-01-11
Last modified 2001-03-16
References
@ -225,7 +224,7 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.2.html
[14]The GCC team
Last modified 2000-11-10
Last modified 2001-02-12
References
@ -347,7 +346,7 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.1.html
[14]The GCC team
Last modified 2000-11-10
Last modified 2001-02-12
References
@ -414,7 +413,7 @@ http://gcc.gnu.org/gcc-2.95/gcc-2.95.html
[14]The GCC team
Last modified 2000-11-10
Last modified 2001-02-12
References
@ -503,7 +502,7 @@ http://gcc.gnu.org/gcc-2.95/features.html
[18]The GCC team
Last modified 2000-12-04
Last modified 2001-02-12
References
@ -573,7 +572,7 @@ http://gcc.gnu.org/gcc-2.95/caveats.html
[4]The GCC team
Last modified 2000-11-10
Last modified 2001-02-12
References

2
contrib/gcc/config/i386/freebsd.h
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@ -37,7 +37,7 @@ Boston, MA 02111-1307, USA. */
/* Use more efficient ``thunks'' to implement C++ vtables. */
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 2
#define DEFAULT_VTABLE_THUNKS 1
/* Override the default comment-starter of "/". */
#undef ASM_COMMENT_START

2
contrib/gcc/config/i386/freebsd.h.fixed
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@ -37,7 +37,7 @@ Boston, MA 02111-1307, USA. */
/* Use more efficient ``thunks'' to implement C++ vtables. */
#undef DEFAULT_VTABLE_THUNKS
#define DEFAULT_VTABLE_THUNKS 2
#define DEFAULT_VTABLE_THUNKS 1
/* Override the default comment-starter of "/". */
#undef ASM_COMMENT_START

4
contrib/gcc/cp/ChangeLog
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@ -1,3 +1,7 @@
Fri Mar 16 12:46:19 GMT 2001 Bernd Schmidt (bernds@redhat.com)
* gcc-2.95.3 Released.
Fri Jun 9 17:55:08 2000 Jeffrey A Law (law@cygnus.com)
2000-02-07 <loewis@informatik.hu-berlin.de>

61
contrib/gcc/except.c
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@ -723,42 +723,22 @@ static void
receive_exception_label (handler_label)
rtx handler_label;
{
rtx around_label = NULL_RTX;
if (! flag_new_exceptions || exceptions_via_longjmp)
{
around_label = gen_label_rtx ();
emit_jump (around_label);
emit_barrier ();
}
emit_label (handler_label);
if (! exceptions_via_longjmp)
{
#ifdef HAVE_exception_receiver
if (HAVE_exception_receiver)
emit_insn (gen_exception_receiver ());
else
if (! exceptions_via_longjmp)
if (HAVE_exception_receiver)
emit_insn (gen_exception_receiver ());
#endif
#ifdef HAVE_nonlocal_goto_receiver
if (HAVE_nonlocal_goto_receiver)
emit_insn (gen_nonlocal_goto_receiver ());
else
#endif
{ /* Nothing */ }
}
else
{
#ifndef DONT_USE_BUILTIN_SETJMP
expand_builtin_setjmp_receiver (handler_label);
#endif
}
if (around_label)
emit_label (around_label);
#ifdef HAVE_nonlocal_goto_receiver
if (! exceptions_via_longjmp)
if (HAVE_nonlocal_goto_receiver)
emit_insn (gen_nonlocal_goto_receiver ());
#endif
}
struct func_eh_entry
{
int range_number; /* EH region number from EH NOTE insn's */
@ -1340,7 +1320,7 @@ static void
start_dynamic_handler ()
{
rtx dhc, dcc;
rtx arg, buf;
rtx x, arg, buf;
int size;
#ifndef DONT_USE_BUILTIN_SETJMP
@ -1382,17 +1362,18 @@ start_dynamic_handler ()
buf = plus_constant (XEXP (arg, 0), GET_MODE_SIZE (Pmode)*2);
#ifdef DONT_USE_BUILTIN_SETJMP
{
rtx x;
x = emit_library_call_value (setjmp_libfunc, NULL_RTX, LCT_CONST,
TYPE_MODE (integer_type_node), 1,
buf, Pmode);
/* If we come back here for a catch, transfer control to the handler. */
jumpif_rtx (x, ehstack.top->entry->exception_handler_label);
}
x = emit_library_call_value (setjmp_libfunc, NULL_RTX, 1, SImode, 1,
buf, Pmode);
/* If we come back here for a catch, transfer control to the handler. */
jumpif_rtx (x, ehstack.top->entry->exception_handler_label);
#else
expand_builtin_setjmp_setup (buf,
ehstack.top->entry->exception_handler_label);
{
/* A label to continue execution for the no exception case. */
rtx noex = gen_label_rtx();
x = expand_builtin_setjmp (buf, NULL_RTX, noex,
ehstack.top->entry->exception_handler_label);
emit_label (noex);
}
#endif
/* We are committed to this, so update the handler chain. */

140
contrib/gcc/expr.c
View File

@ -192,7 +192,6 @@ static rtx expand_builtin PROTO((tree, rtx, rtx,
static int apply_args_size PROTO((void));
static int apply_result_size PROTO((void));
static rtx result_vector PROTO((int, rtx));
static rtx expand_builtin_setjmp PROTO((tree, rtx));
static rtx expand_builtin_apply_args PROTO((void));
static rtx expand_builtin_apply PROTO((rtx, rtx, rtx));
static void expand_builtin_return PROTO((rtx));
@ -8545,29 +8544,44 @@ expand_builtin_return_addr (fndecl_code, count, tem)
return tem;
}
/* Construct the leading half of a __builtin_setjmp call. Control will
return to RECEIVER_LABEL. This is used directly by sjlj exception
handling code. */
/* __builtin_setjmp is passed a pointer to an array of five words (not
all will be used on all machines). It operates similarly to the C
library function of the same name, but is more efficient. Much of
the code below (and for longjmp) is copied from the handling of
non-local gotos.
void
expand_builtin_setjmp_setup (buf_addr, receiver_label)
NOTE: This is intended for use by GNAT and the exception handling
scheme in the compiler and will only work in the method used by
them. */
rtx
expand_builtin_setjmp (buf_addr, target, first_label, next_label)
rtx buf_addr;
rtx receiver_label;
rtx target;
rtx first_label, next_label;
{
rtx lab1 = gen_label_rtx ();
enum machine_mode sa_mode = STACK_SAVEAREA_MODE (SAVE_NONLOCAL);
enum machine_mode value_mode;
rtx stack_save;
value_mode = TYPE_MODE (integer_type_node);
#ifdef POINTERS_EXTEND_UNSIGNED
buf_addr = convert_memory_address (Pmode, buf_addr);
#endif
buf_addr = force_reg (Pmode, buf_addr);
if (target == 0 || GET_CODE (target) != REG
|| REGNO (target) < FIRST_PSEUDO_REGISTER)
target = gen_reg_rtx (value_mode);
emit_queue ();
/* We store the frame pointer and the address of receiver_label in
the buffer and use the rest of it for the stack save area, which
is machine-dependent. */
/* We store the frame pointer and the address of lab1 in the buffer
and use the rest of it for the stack save area, which is
machine-dependent. */
#ifndef BUILTIN_SETJMP_FRAME_VALUE
#define BUILTIN_SETJMP_FRAME_VALUE virtual_stack_vars_rtx
@ -8579,7 +8593,7 @@ expand_builtin_setjmp_setup (buf_addr, receiver_label)
(gen_rtx_MEM (Pmode,
plus_constant (buf_addr,
GET_MODE_SIZE (Pmode)))),
force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, receiver_label)));
force_reg (Pmode, gen_rtx_LABEL_REF (Pmode, lab1)));
stack_save = gen_rtx_MEM (sa_mode,
plus_constant (buf_addr,
@ -8592,22 +8606,20 @@ expand_builtin_setjmp_setup (buf_addr, receiver_label)
emit_insn (gen_builtin_setjmp_setup (buf_addr));
#endif
/* Tell optimize_save_area_alloca that extra work is going to
need to go on during alloca. */
current_function_calls_setjmp = 1;
/* Set TARGET to zero and branch to the first-time-through label. */
emit_move_insn (target, const0_rtx);
emit_jump_insn (gen_jump (first_label));
emit_barrier ();
emit_label (lab1);
/* Tell flow about the strange goings on. Putting `lab1' on
`nonlocal_goto_handler_labels' to indicates that function
calls may traverse the arc back to this label. */
/* Set this so all the registers get saved in our frame; we need to be
able to copy the saved values for any registers from frames we unwind. */
current_function_has_nonlocal_label = 1;
}
nonlocal_goto_handler_labels =
gen_rtx_EXPR_LIST (VOIDmode, lab1, nonlocal_goto_handler_labels);
/* Construct the trailing part of a __builtin_setjmp call.
This is used directly by sjlj exception handling code. */
void
expand_builtin_setjmp_receiver (receiver_label)
rtx receiver_label ATTRIBUTE_UNUSED;
{
/* Clobber the FP when we get here, so we have to make sure it's
marked as used by this function. */
emit_insn (gen_rtx_USE (VOIDmode, hard_frame_pointer_rtx));
@ -8654,7 +8666,7 @@ expand_builtin_setjmp_receiver (receiver_label)
#ifdef HAVE_builtin_setjmp_receiver
if (HAVE_builtin_setjmp_receiver)
emit_insn (gen_builtin_setjmp_receiver (receiver_label));
emit_insn (gen_builtin_setjmp_receiver (lab1));
else
#endif
#ifdef HAVE_nonlocal_goto_receiver
@ -8666,67 +8678,11 @@ expand_builtin_setjmp_receiver (receiver_label)
; /* Nothing */
}
/* @@@ This is a kludge. Not all machine descriptions define a blockage
insn, but we must not allow the code we just generated to be reordered
by scheduling. Specifically, the update of the frame pointer must
happen immediately, not later. So emit an ASM_INPUT to act as blockage
insn. */
emit_insn (gen_rtx_ASM_INPUT (VOIDmode, ""));
}
/* __builtin_setjmp is passed a pointer to an array of five words (not
all will be used on all machines). It operates similarly to the C
library function of the same name, but is more efficient. Much of
the code below (and for longjmp) is copied from the handling of
non-local gotos.
NOTE: This is intended for use by GNAT and the exception handling
scheme in the compiler and will only work in the method used by
them. */
static rtx
expand_builtin_setjmp (arglist, target)
tree arglist;
rtx target;
{
rtx buf_addr, next_lab, cont_lab;
if (arglist == 0
|| TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE)
return NULL_RTX;
if (target == 0 || GET_CODE (target) != REG
|| REGNO (target) < FIRST_PSEUDO_REGISTER)
target = gen_reg_rtx (TYPE_MODE (integer_type_node));
buf_addr = expand_expr (TREE_VALUE (arglist), NULL_RTX, VOIDmode, 0);
next_lab = gen_label_rtx ();
cont_lab = gen_label_rtx ();
expand_builtin_setjmp_setup (buf_addr, next_lab);
/* Set TARGET to zero and branch to the continue label. */
emit_move_insn (target, const0_rtx);
emit_jump_insn (gen_jump (cont_lab));
emit_barrier ();
emit_label (next_lab);
expand_builtin_setjmp_receiver (next_lab);
/* Set TARGET to one. */
/* Set TARGET, and branch to the next-time-through label. */
emit_move_insn (target, const1_rtx);
emit_label (cont_lab);
emit_jump_insn (gen_jump (next_label));
emit_barrier ();
/* Tell flow about the strange goings on. Putting `next_lab' on
`nonlocal_goto_handler_labels' to indicates that function
calls may traverse the arc back to this label. */
current_function_has_nonlocal_label = 1;
nonlocal_goto_handler_labels
= gen_rtx_EXPR_LIST (VOIDmode, next_lab, nonlocal_goto_handler_labels);
return target;
}
@ -9747,10 +9703,18 @@ expand_builtin (exp, target, subtarget, mode, ignore)
#endif
case BUILT_IN_SETJMP:
target = expand_builtin_setjmp (arglist, target);
if (target)
return target;
break;
if (arglist == 0
|| TREE_CODE (TREE_TYPE (TREE_VALUE (arglist))) != POINTER_TYPE)
break;
else
{
rtx buf_addr = expand_expr (TREE_VALUE (arglist), subtarget,
VOIDmode, 0);
rtx lab = gen_label_rtx ();
rtx ret = expand_builtin_setjmp (buf_addr, target, lab, lab);
emit_label (lab);
return ret;
}
/* __builtin_longjmp is passed a pointer to an array of five words.
It's similar to the C library longjmp function but works with

3
contrib/gcc/expr.h
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@ -831,8 +831,7 @@ extern rtx store_expr PROTO((tree, rtx, int));
Useful after calling expand_expr with 1 as sum_ok. */
extern rtx force_operand PROTO((rtx, rtx));
extern void expand_builtin_setjmp_setup PARAMS ((rtx, rtx));
extern void expand_builtin_setjmp_receiver PARAMS ((rtx));
extern rtx expand_builtin_setjmp PROTO((rtx, rtx, rtx, rtx));
#ifdef TREE_CODE
/* Generate code for computing expression EXP.

4
contrib/gcc/f/ChangeLog
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@ -1,3 +1,7 @@
Fri Mar 16 12:46:19 GMT 2001 Bernd Schmidt (bernds@redhat.com)
* gcc-2.95.3 Released.
Mon Mar 13 01:00:55 2000 Toon Moene <toon@moene.indiv.nluug.nl>
* stw.h (struct _ffestw_): Change type of uses_ to int.

2
contrib/gcc/f/version.c
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@ -1 +1 @@
const char *ffe_version_string = "0.5.25 19991030 (prerelease)";
const char *ffe_version_string = "0.5.25 20010315 (release)";

2
contrib/gcc/final.c
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@ -3103,7 +3103,7 @@ alter_subreg (x)
PUT_CODE (x, MEM);
MEM_COPY_ATTRIBUTES (x, y);
MEM_ALIAS_SET (x) = MEM_ALIAS_SET (y);
XEXP (x, 0) = plus_constant (XEXP (y, 0), offset);
XEXP (x, 0) = plus_constant_for_output (XEXP (y, 0), offset);
}
return x;

12
contrib/gcc/varasm.c
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@ -3494,18 +3494,6 @@ force_const_mem (mode, x)
pop_obstacks ();
}
if (GET_CODE (x) == LABEL_REF)
{
extern rtx forced_labels;
push_obstacks_nochange ();
rtl_in_saveable_obstack ();
forced_labels = gen_rtx_EXPR_LIST (VOIDmode,
XEXP (x, 0),
forced_labels);
pop_obstacks ();
}
/* Allocate a pool constant descriptor, fill it in, and chain it in. */

2
contrib/gcc/version.c
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@ -1 +1 @@
char *version_string = "2.95.3 20010125 (prerelease)";
char *version_string = "2.95.3 20010315 (release)";