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In reload, retain only those clobbers added for variable-array handling.

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From-SVN: r56863
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Dale Johannesen 2002-09-05 20:41:11 +00:00 committed by Dale Johannesen
parent dc0ba55a5b
commit 41e34bab13
2 changed files with 12 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-09-05 Dale Johannesen <dalej@apple.com>
* reload1.c (reload): Retain only those memory clobbers
added for variable-array handling.
2002-09-05 Jason Thorpe <thorpej@wasabisystems.com>
* config/arm/arm.c (arm_return_in_memory): Implement ATPCS

11
gcc/reload1.c
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@ -1180,9 +1180,9 @@ reload (first, global)
/* Make a pass over all the insns and delete all USEs which we inserted
only to tag a REG_EQUAL note on them. Remove all REG_DEAD and REG_UNUSED
notes. Delete all CLOBBER insns that don't refer to the return value
or to memory (mem:BLK CLOBBERs must be retained to prevent the scheduler
from misarranging variable-array code) and simplify (subreg (reg))
notes. Delete all CLOBBER insns, except those that refer to the return
value and the special mem:BLK CLOBBERs added to prevent the scheduler
from misarranging variable-array code, and simplify (subreg (reg))
operands. Also remove all REG_RETVAL and REG_LIBCALL notes since they
are no longer useful or accurate. Strip and regenerate REG_INC notes
that may have been moved around. */
@ -1203,7 +1203,10 @@ reload (first, global)
|| find_reg_note (insn, REG_EQUAL, NULL_RTX)))
|| (GET_CODE (PATTERN (insn)) == CLOBBER
&& (GET_CODE (XEXP (PATTERN (insn), 0)) != MEM
|| GET_MODE (XEXP (PATTERN (insn), 0)) != BLKmode)
|| GET_MODE (XEXP (PATTERN (insn), 0)) != BLKmode
|| (GET_CODE (XEXP (XEXP (PATTERN (insn), 0), 0)) != SCRATCH
&& XEXP (XEXP (PATTERN (insn), 0), 0)
!= stack_pointer_rtx))
&& (GET_CODE (XEXP (PATTERN (insn), 0)) != REG
|| ! REG_FUNCTION_VALUE_P (XEXP (PATTERN (insn), 0)))))
{