mirror/gcc
2
0
Fork 0
mirror of git://gcc.gnu.org/git/gcc.git synced 2025-04-04 19:31:14 +08:00
Code Issues Packages Projects Releases Wiki Activity

re PR rtl-optimization/41646 (Reload ICE due to combiner extending life time of a hard register)

Browse Source 
PR rtl-optimization/41646
	* calls.c (expand_call): For BLKmode types returned in registers
	avoid likely spilled hard regs in copy_blkmode_from_reg generated
	insns.

	* gcc.c-torture/compile/pr41646.c: New test.

From-SVN: r152597
This commit is contained in:
Jakub Jelinek 2009-10-09 21:01:53 +02:00 committed by Jakub Jelinek
parent aabf6a0372
commit 78441afbc8
4 changed files with 44 additions and 1 deletions
gcc
ChangeLogcalls.c
testsuite
ChangeLog
gcc.c-torture/compile
pr41646.c

7
gcc/ChangeLog

@ -1,3 +1,10 @@
2009-10-09 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/41646
* calls.c (expand_call): For BLKmode types returned in registers
avoid likely spilled hard regs in copy_blkmode_from_reg generated
insns.
2009-10-09 Richard Guenther <rguenther@suse.de>
PR tree-optimization/41634

5
gcc/calls.c

@ -3020,7 +3020,10 @@ expand_call (tree exp, rtx target, int ignore)
}
else if (TYPE_MODE (rettype) == BLKmode)
{
target = copy_blkmode_from_reg (target, valreg, rettype);
rtx val = valreg;
if (GET_MODE (val) != BLKmode)
val = avoid_likely_spilled_reg (val);
target = copy_blkmode_from_reg (target, val, rettype);
/* We can not support sibling calls for this case. */
sibcall_failure = 1;

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2009-10-09 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/41646
* gcc.c-torture/compile/pr41646.c: New test.
2009-10-09 Richard Guenther <rguenther@suse.de>
PR tree-optimization/41634

28
gcc/testsuite/gcc.c-torture/compile/pr41646.c Normal file

@ -0,0 +1,28 @@
/* PR rtl-optimization/41646 */
struct A { unsigned long a; };
struct B { unsigned short b, c, d; };
struct B bar (unsigned long);
char *
foo (char *a, struct A *x)
{
struct B b = bar (x->a);
unsigned char c;
unsigned short d;
a[3] = ((unsigned char) (b.b % 10) + 48);
d = b.b / 10;
a[2] = ((unsigned char) (d % 10) + 48);
d = d / 10;
a[1] = ((unsigned char) (d % 10) + 48);
a[0] = ((unsigned char) ((d / 10) % 10) + 48);
a[4] = 46;
c = (unsigned char) b.c;
a[6] = (c % 10 + 48);
a[5] = ((c / 10) % 10 + 48);
a[7] = 46;
c = b.d;
a[9] = (c % 10 + 48);
a[8] = ((c / 10) % 10 + 48);
return a + 10;
}