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re PR bootstrap/4192 (fr30-elf does not build - memory exhausted building crtbegin.o)

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PR bootstrap/4192
	* config/fr30/fr30.md (jump): Comment out clobber of fixed register.

	* genemit.c (output_added_clobbers_hard_reg_p): Only output return
	stmt if some case has been output.

	* gcc.c-torture/compile/20020320-1.c: New test.

From-SVN: r51088
This commit is contained in:
Jakub Jelinek 2002-03-20 22:58:57 +01:00 • committed by Jakub Jelinek
parent 048b1c951b
commit a29b099d7a
5 changed files with 49 additions and 5 deletions
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8
gcc/ChangeLog
View file

@ -1,3 +1,11 @@
2002-03-20 Jakub Jelinek <jakub@redhat.com>
PR bootstrap/4192
* config/fr30/fr30.md (jump): Comment out clobber of fixed register.
* genemit.c (output_added_clobbers_hard_reg_p): Only output return
stmt if some case has been output.
2002-03-20 Jakub Jelinek <jakub@redhat.com>
PR c/5972

7
gcc/config/fr30/fr30.md
View file

@ -1303,9 +1303,12 @@
;; Normal unconditional jump.
;; For a description of the computation of the length
;; attribute see the branch patterns above.
;;
;; Although this instruction really clobbers r0, flow
;; relies on jump being simplejump_p in several places
;; and as r0 is fixed, this doesn't change anything
(define_insn "jump"
[(set (pc) (label_ref (match_operand 0 "" "")))
(clobber (reg:SI 0))]
[(set (pc) (label_ref (match_operand 0 "" "")))]
""
"*
{

11
gcc/genemit.c
View file

@ -722,7 +722,7 @@ output_added_clobbers_hard_reg_p ()
{
struct clobber_pat *clobber;
struct clobber_ent *ent;
int clobber_p;
int clobber_p, used;
printf ("\n\nint\nadded_clobbers_hard_reg_p (insn_code_number)\n");
printf (" int insn_code_number;\n");
@ -732,12 +732,17 @@ output_added_clobbers_hard_reg_p ()
for (clobber_p = 0; clobber_p <= 1; clobber_p++)
{
used = 0;
for (clobber = clobber_list; clobber; clobber = clobber->next)
if (clobber->has_hard_reg == clobber_p)
for (ent = clobber->insns; ent; ent = ent->next)
printf (" case %d:\n", ent->code_number);
{
printf (" case %d:\n", ent->code_number);
used++;
}
printf (" return %d;\n\n", clobber_p);
if (used)
printf (" return %d;\n\n", clobber_p);
}
printf (" default:\n");

4
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,7 @@
2002-03-20 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/compile/20020320-1.c: New test.
2002-03-19 Jakub Jelinek <jakub@redhat.com>
* gcc.c-torture/compile/20020318-1.c: New test.

24
gcc/testsuite/gcc.c-torture/compile/20020320-1.c Normal file
View file

@ -0,0 +1,24 @@
/* PR bootstrap/4192
This testcase caused infinite loop in flow (several places),
because flow assumes gen_jump generates simple_jump_p. */
typedef void (*T) (void);
extern T x[];
void
foo (void)
{
static T *p = x;
static _Bool a;
T f;
if (__builtin_expect (a, 0))
return;
while ((f = *p))
{
p++;
f ();
}
a = 1;
}