+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
/* 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. */
|| 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)))))
{