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simplify-rtx.c (simplify_subreg): Use subreg_regno_offset directly instead of using a SUBREG temporary. 

* simplify-rtx.c (simplify_subreg): Use subreg_regno_offset directly
        instead of using a SUBREG temporary.

From-SVN: r91114
This commit is contained in:
Richard Henderson 2004-11-23 15:03:15 -08:00 committed by Richard Henderson
parent b2cfdb12c2
commit 4488a8b876
2 changed files with 9 additions and 3 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2004-11-23 Richard Henderson <rth@redhat.com>
* simplify-rtx.c (simplify_subreg): Use subreg_regno_offset directly
instead of using a SUBREG temporary.
2004-11-23 Kazu Hirata <kazu@cs.umass.edu>
* tree-cfg.c (tree_forwarder_block_p): Speed up by reordering

7
gcc/simplify-rtx.c
View File

@ -3675,14 +3675,15 @@ simplify_subreg (enum machine_mode outermode, rtx op,
&& subreg_offset_representable_p (REGNO (op), innermode,
byte, outermode))
{
rtx tem = gen_rtx_SUBREG (outermode, op, byte);
int final_regno = subreg_hard_regno (tem, 0);
unsigned int regno = REGNO (op);
unsigned int final_regno
= regno + subreg_regno_offset (regno, innermode, byte, outermode);
/* ??? We do allow it if the current REG is not valid for
its mode. This is a kludge to work around how float/complex
arguments are passed on 32-bit SPARC and should be fixed. */
if (HARD_REGNO_MODE_OK (final_regno, outermode)
|| ! HARD_REGNO_MODE_OK (REGNO (op), innermode))
|| ! HARD_REGNO_MODE_OK (regno, innermode))
{
rtx x = gen_rtx_REG_offset (op, outermode, final_regno, byte);