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author | Alexandre Oliva <aoliva@redhat.com> | 2001-01-07 02:26:51 +0000 |
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committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2001-01-07 02:26:51 +0000 |
commit | f759eb8bf0d98603f2e6930126e517ed995a64a8 (patch) | |
tree | 17de3bb34420626f8eab111aee34a18e3a1f275f /gcc/jump.c | |
parent | 0e2e89fd2e117555f71be7a28e41f5f7663c3395 (diff) | |
download | gcc-f759eb8bf0d98603f2e6930126e517ed995a64a8.zip gcc-f759eb8bf0d98603f2e6930126e517ed995a64a8.tar.gz gcc-f759eb8bf0d98603f2e6930126e517ed995a64a8.tar.bz2 |
reload.c (subst_reloads): Take INSN argument.
* reload.c (subst_reloads): Take INSN argument. When
replacing a LABEL_REF in a JUMP_INSN, add a REG_LABEL note.
* reload.h (subst_reloads): Adjust prototype.
* reload1.c (reload_as_needed): Pass INSN to subst_reloads.
* jump.c (mark_all_labels): Canonicalize any REG_LABEL notes
present in JUMP_INSNs and copy them to JUMP_LABEL.
* flow.c (find_label_refs, find_basic_blocks_1): Skip
JUMP_INSNs and insns with REG_LABELs that are followed by
JUMP_INSNs with the same REG_LABEL.
* sched-rgn.c (is_cfg_nonregular): Likewise.
* rtlanal.c (computed_jump_p): Make it false if a REG_LABEL
note is available.
* unroll.c (unroll_loop): Look for REG_LABEL notes in
JUMP_INSNs too.
* rtl.texi (REG_LABEL): Document usage in JUMP_INSNs.
From-SVN: r38755
Diffstat (limited to 'gcc/jump.c')
-rw-r--r-- | gcc/jump.c | 18 |
1 files changed, 18 insertions, 0 deletions
@@ -863,6 +863,24 @@ mark_all_labels (f, cross_jump) mark_jump_label (PATTERN (insn), insn, cross_jump, 0); if (! INSN_DELETED_P (insn) && GET_CODE (insn) == JUMP_INSN) { + /* When we know the LABEL_REF contained in a REG used in + an indirect jump, we'll have a REG_LABEL note so that + flow can tell where it's going. */ + if (JUMP_LABEL (insn) == 0) + { + rtx label_note = find_reg_note (insn, REG_LABEL, NULL_RTX); + if (label_note) + { + /* But a LABEL_REF around the REG_LABEL note, so + that we can canonicalize it. */ + rtx label_ref = gen_rtx_LABEL_REF (VOIDmode, + XEXP (label_note, 0)); + + mark_jump_label (label_ref, insn, cross_jump, 0); + XEXP (label_note, 0) = XEXP (label_ref, 0); + JUMP_LABEL (insn) = XEXP (label_note, 0); + } + } if (JUMP_LABEL (insn) != 0 && simplejump_p (insn)) { jump_chain[INSN_UID (insn)] |