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reload1.c (choose_reload_regs): Also try inheritance when reload_in is a stack slot of a pseudo...

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* reload1.c (choose_reload_regs): Also try inheritance when
	reload_in is a stack slot of a pseudo, even if we already got a
	reload reg.

From-SVN: r22571
This commit is contained in:
J"orn Rennecke 1998-09-24 13:58:43 +00:00 committed by Joern Rennecke
parent 5adf6da0eb
commit b29514ee9d
2 changed files with 19 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
Thu Sep 24 21:48:51 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload1.c (choose_reload_regs): Also try inheritance when
reload_in is a stack slot of a pseudo, even if we already got a
reload reg.
Thu Sep 24 21:22:39 1998 J"orn Rennecke <amylaar@cygnus.co.uk>
* reload1.c (reload_cse_regs_1): Renamed from reload_cse_regs.

17
gcc/reload1.c
View File

@ -5675,13 +5675,16 @@ choose_reload_regs (insn, avoid_return_reg)
&& ! reload_secondary_p[r])
continue;
/* If find_reloads chose a to use reload_in or reload_out as a reload
/* If find_reloads chose to use reload_in or reload_out as a reload
register, we don't need to chose one. Otherwise, try even if it
found one since we might save an insn if we find the value lying
around. */
around.
Try also when reload_in is a pseudo without a hard reg. */
if (reload_in[r] != 0 && reload_reg_rtx[r] != 0
&& (rtx_equal_p (reload_in[r], reload_reg_rtx[r])
|| rtx_equal_p (reload_out[r], reload_reg_rtx[r])))
|| (rtx_equal_p (reload_out[r], reload_reg_rtx[r])
&& GET_CODE (reload_in[r]) != MEM
&& true_regnum (reload_in[r]) < FIRST_PSEUDO_REGISTER)))
continue;
#if 0 /* No longer needed for correct operation.
@ -5827,7 +5830,13 @@ choose_reload_regs (insn, avoid_return_reg)
/* Don't really use the inherited spill reg
if we need it wider than we've got it. */
|| (GET_MODE_SIZE (reload_mode[r])
> GET_MODE_SIZE (mode)))
> GET_MODE_SIZE (mode))
/* If find_reloads chose reload_out as reload
register, stay with it - that leaves the
inherited register for subsequent reloads. */
|| (reload_reg_rtx
&& rtx_equal_p (reload_out[r],
reload_reg_rtx[r])))
reload_override_in[r] = reg_last_reload_reg[regno];
else
{