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cse.c (canon_hash): Reorder do_not_record test.

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* cse.c (canon_hash): Reorder do_not_record test.  Always
        allow pic_offset_table_rtx.

From-SVN: r53665
This commit is contained in:
Richard Henderson 2002-05-20 09:59:03 -07:00 committed by Richard Henderson
parent 9aa338ece2
commit 1441374bc9
2 changed files with 29 additions and 11 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-05-20 Richard Henderson <rth@redhat.com>
* cse.c (canon_hash): Reorder do_not_record test. Always
allow pic_offset_table_rtx.
2002-05-19 Toon Moene <toon@moene.indiv.nluug.nl>
* optabs.c (expand_cmplxdiv_wide): Use complex_part_zero_p.

35
gcc/cse.c
View File

@ -2249,10 +2249,11 @@ canon_hash (x, mode)
case REG:
{
unsigned int regno = REGNO (x);
bool record;
/* On some machines, we can't record any non-fixed hard register,
because extending its life will cause reload problems. We
consider ap, fp, and sp to be fixed for this purpose.
consider ap, fp, sp, gp to be fixed for this purpose.
We also consider CCmode registers to be fixed for this purpose;
failure to do so leads to failure to simplify 0<100 type of
@ -2262,16 +2263,28 @@ canon_hash (x, mode)
Nor should we record any register that is in a small
class, as defined by CLASS_LIKELY_SPILLED_P. */
if (regno < FIRST_PSEUDO_REGISTER
&& (global_regs[regno]
|| CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (regno))
|| (SMALL_REGISTER_CLASSES
&& ! fixed_regs[regno]
&& x != frame_pointer_rtx
&& x != hard_frame_pointer_rtx
&& x != arg_pointer_rtx
&& x != stack_pointer_rtx
&& GET_MODE_CLASS (GET_MODE (x)) != MODE_CC)))
if (regno >= FIRST_PSEUDO_REGISTER)
record = true;
else if (x == frame_pointer_rtx
|| x == hard_frame_pointer_rtx
|| x == arg_pointer_rtx
|| x == stack_pointer_rtx
|| x == pic_offset_table_rtx)
record = true;
else if (global_regs[regno])
record = false;
else if (fixed_regs[regno])
record = true;
else if (GET_MODE_CLASS (GET_MODE (x)) == MODE_CC)
record = true;
else if (SMALL_REGISTER_CLASSES)
record = false;
else if (CLASS_LIKELY_SPILLED_P (REGNO_REG_CLASS (regno)))
record = false;
else
record = true;
if (!record)
{
do_not_record = 1;
return 0;