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

re PR rtl-optimization/53942 (unable to find a register to spill in class 'CREG') 

PR rtl-optimization/53942
	* function.c (assign_parm_setup_reg): Avoid zero/sign extension
	directly from likely spilled non-fixed hard registers, move them
	to pseudo first.

	* gcc.dg/pr53942.c: New test.

From-SVN: r189681
This commit is contained in:
Jakub Jelinek 2012-07-19 22:48:25 +02:00 committed by Jakub Jelinek
parent fdb45c0cc3
commit f9fef34989
4 changed files with 63 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
2012-07-19 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/53942
* function.c (assign_parm_setup_reg): Avoid zero/sign extension
directly from likely spilled non-fixed hard registers, move them
to pseudo first.
2012-07-19 Steve Ellcey <sellcey@mips.com>
* config/mips/mips.c (mips_set_mips16_mode): Clear SYNCI_MASK in

19
gcc/function.c
View File

@ -2987,11 +2987,26 @@ assign_parm_setup_reg (struct assign_parm_data_all *all, tree parm,
&& insn_operand_matches (icode, 1, op1))
{
enum rtx_code code = unsignedp ? ZERO_EXTEND : SIGN_EXTEND;
rtx insn, insns;
rtx insn, insns, t = op1;
HARD_REG_SET hardregs;
start_sequence ();
insn = gen_extend_insn (op0, op1, promoted_nominal_mode,
/* If op1 is a hard register that is likely spilled, first
force it into a pseudo, otherwise combiner might extend
its lifetime too much. */
if (GET_CODE (t) == SUBREG)
t = SUBREG_REG (t);
if (REG_P (t)
&& HARD_REGISTER_P (t)
&& ! TEST_HARD_REG_BIT (fixed_reg_set, REGNO (t))
&& targetm.class_likely_spilled_p (REGNO_REG_CLASS (REGNO (t))))
{
t = gen_reg_rtx (GET_MODE (op1));
emit_move_insn (t, op1);
}
else
t = op1;
insn = gen_extend_insn (op0, t, promoted_nominal_mode,
data->passed_mode, unsignedp);
emit_insn (insn);
insns = get_insns ();

5
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2012-07-19 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/53942
* gcc.dg/pr53942.c: New test.
2012-07-19 Jason Merrill <jason@redhat.com>
PR c++/54021

34
gcc/testsuite/gcc.dg/pr53942.c Normal file
View File

@ -0,0 +1,34 @@
/* PR rtl-optimization/53942 */
/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-additional-options "-mtune=pentium2" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
struct S
{
unsigned short w[3];
unsigned int x, y;
};
struct S *baz (void);
__attribute__ ((noinline))
static unsigned char
foo (struct S *x, unsigned char y)
{
unsigned char c = 0;
unsigned char v = x->w[0];
c |= v;
v = ((x->w[1]) & (1 << y)) ? 1 : 0;
c |= v << 1;
v = ((x->w[2]) & 0xff) & (1 << y);
c |= v << 2;
return c;
}
void
bar (void)
{
struct S *s = baz ();
s->x = foo (s, 6);
s->y = foo (s, 7);
}