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jump.c (jump_optimize_1): Do not delete assignments to internal_arg_pointer.

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* jump.c (jump_optimize_1): Do not delete assignments to
        internal_arg_pointer.
        * cse.c (delete_trivially_dead_insns): Always consider a set of
        the internal_arg_pointer live.

From-SVN: r28957
This commit is contained in:
Jeffrey A Law 1999-08-29 01:42:28 +00:00 committed by Jeff Law
parent 27778b739c
commit af37f0dda9
3 changed files with 20 additions and 2 deletions
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7
gcc/ChangeLog
View File

@ -1,3 +1,10 @@
Sat Aug 28 19:36:05 1999 Jeffrey A Law (law@cygnus.com)
* jump.c (jump_optimize_1): Do not delete assignments to
internal_arg_pointer.
* cse.c (delete_trivially_dead_insns): Always consider a set of
the internal_arg_pointer live.
Sat Aug 28 16:24:31 1999 Richard Henderson <rth@cygnus.com>
* flow.c (flow_delete_insn_chain): Rename from delete_insn_chain.

8
gcc/cse.c
View File

@ -9215,7 +9215,13 @@ delete_trivially_dead_insns (insns, nreg)
else if (GET_CODE (SET_DEST (elt)) != REG
|| REGNO (SET_DEST (elt)) < FIRST_PSEUDO_REGISTER
|| counts[REGNO (SET_DEST (elt))] != 0
|| side_effects_p (SET_SRC (elt)))
|| side_effects_p (SET_SRC (elt))
/* An ADDRESSOF expression can turn into a use of the
internal arg pointer, so always consider the
internal arg pointer live. If it is truly dead,
flow will delete the initializing insn. */
|| (SET_DEST (elt)
== current_function_internal_arg_pointer))
live_insn = 1;
}
else if (GET_CODE (elt) != CLOBBER && GET_CODE (elt) != USE)

7
gcc/jump.c
View File

@ -290,7 +290,12 @@ jump_optimize_1 (f, cross_jump, noop_moves, after_regscan, mark_labels_only)
might arrange to use that reg for real. */
&& REGNO_LAST_NOTE_UID (REGNO (SET_DEST (set))) == INSN_UID (insn)
&& ! side_effects_p (SET_SRC (set))
&& ! find_reg_note (insn, REG_RETVAL, 0))
&& ! find_reg_note (insn, REG_RETVAL, 0)
/* An ADDRESSOF expression can turn into a use of the internal arg
pointer, so do not delete the initialization of the internal
arg pointer yet. If it is truly dead, flow will delete the
initializing insn. */
&& SET_DEST (set) != current_function_internal_arg_pointer)
delete_insn (insn);
}