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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1999-06-21 19:21:48 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1999-06-21 20:21:48 +0100 |
| commit | b8794099b71a90b1a2d336b30fac802aba82345b (patch) | |
| tree | 01b4ae6690b1b9fe4b24402590de60c3eb4d4371 | |
| parent | 8fc4af0f11b77630079ff1e33a527d933aca1ee0 (diff) | |
| download | gcc-b8794099b71a90b1a2d336b30fac802aba82345b.zip gcc-b8794099b71a90b1a2d336b30fac802aba82345b.tar.gz gcc-b8794099b71a90b1a2d336b30fac802aba82345b.tar.bz2 | |
sh.c (machine_dependent_reorg): When fixing up fp pcloads...
* sh.c (machine_dependent_reorg): When fixing up fp pcloads,
remove the clobber of r0 and change the REG_UNUSED note to
REG_INC.
From-SVN: r27676
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/sh/sh.c | 25 |
2 files changed, 30 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2d76c2c..f176d7a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Tue Jun 22 03:17:53 1999 J"orn Rennecke <amylaar@cygnus.co.uk> + + * sh.c (machine_dependent_reorg): When fixing up fp pcloads, + remove the clobber of r0 and change the REG_UNUSED note to + REG_INC. + 1999-06-21 Jakub Jelinek <jj@ultra.linux.cz> * real.c (ereal_from_double): Fix for 64-bit big endian hosts. diff --git a/gcc/config/sh/sh.c b/gcc/config/sh/sh.c index 6181783..7ebaa4d 100644 --- a/gcc/config/sh/sh.c +++ b/gcc/config/sh/sh.c @@ -3098,6 +3098,14 @@ machine_dependent_reorg (first) && REGNO (dst) <= LAST_XD_REG) || REGNO (dst) == FPUL_REG)) { + /* This must be an insn that clobbers r0. */ + rtx clobber = XVECEXP (PATTERN (scan), 0, + XVECLEN (PATTERN (scan), 0) - 1); + + if (GET_CODE (clobber) != CLOBBER + || ! rtx_equal_p (XEXP (clobber, 0), r0_rtx)) + abort (); + if (last_float && reg_set_between_p (r0_rtx, last_float_move, scan)) last_float = 0; @@ -3105,7 +3113,19 @@ machine_dependent_reorg (first) if (lab) emit_insn_before (gen_mova (lab), scan); else - *last_float_addr = r0_inc_rtx; + { + /* There will be a REG_UNUSED note for r0 on + LAST_FLOAT_MOVE; we have to change it to REG_INC, + lest reorg:mark_target_live_regs will not + consider r0 to be used, and we end up with delay + slot insn in front of SCAN that clobber r0. */ + rtx note + = find_regno_note (last_float_move, REG_UNUSED, 0); + + PUT_MODE (note, REG_INC); + + *last_float_addr = r0_inc_rtx; + } last_float_move = scan; last_float = src; newsrc = gen_rtx (MEM, mode, @@ -3114,6 +3134,9 @@ machine_dependent_reorg (first) ? r0_inc_rtx : r0_rtx)); last_float_addr = &XEXP (newsrc, 0); + + /* Remove the clobber of r0. */ + XEXP (clobber, 0) = gen_rtx_SCRATCH (Pmode); } else { |