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| author | Alexandre Oliva <aoliva@redhat.com> | 2001-01-07 02:26:51 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2001-01-07 02:26:51 +0000 |
| commit | f759eb8bf0d98603f2e6930126e517ed995a64a8 (patch) | |
| tree | 17de3bb34420626f8eab111aee34a18e3a1f275f /gcc/reload.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/reload.c')
| -rw-r--r-- | gcc/reload.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index 7b9b669..11e33f0 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -5679,7 +5679,8 @@ find_reloads_subreg_address (x, force_replace, opnum, type, Return the rtx that X translates into; usually X, but modified. */ void -subst_reloads () +subst_reloads (insn) + rtx insn; { register int i; @@ -5689,6 +5690,15 @@ subst_reloads () register rtx reloadreg = rld[r->what].reg_rtx; if (reloadreg) { + /* If we're replacing a LABEL_REF with a register, add a + REG_LABEL note to indicate to flow which label this + register refers to. */ + if (GET_CODE (*r->where) == LABEL_REF + && GET_CODE (insn) == JUMP_INSN) + REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_LABEL, + XEXP (*r->where, 0), + REG_NOTES (insn)); + /* Encapsulate RELOADREG so its machine mode matches what used to be there. Note that gen_lowpart_common will do the wrong thing if RELOADREG is multi-word. RELOADREG |