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a29k.h (ELIGIBLE_FOR_EPILOGUE_DELAY): Avoid loads from varying addresses in the epilogue delay slot. 

* a29k.h (ELIGIBLE_FOR_EPILOGUE_DELAY): Avoid loads from varying
        addresses in the epilogue delay slot.

From-SVN: r16394
This commit is contained in:
J"orn Rennecke 1997-11-09 08:59:55 +00:00 committed by Jeff Law
parent 553914ad8b
commit 7091039c68
2 changed files with 12 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Sun Nov 9 02:00:29 1997 J"orn Rennecke <amylaar@cygnus.co.uk>
* a29k.h (ELIGIBLE_FOR_EPILOGUE_DELAY): Avoid loads from varying
addresses in the epilogue delay slot.
Sun Nov 9 01:40:40 1997 Manfred Hollstein (manfred@s-direktnet.de)
* m88k/dgux.h (ASM_CPU_SPEC): Reformatted to suppress wrong whitespace

9
gcc/config/a29k/a29k.h
View File

@ -987,13 +987,18 @@ extern char *a29k_function_name;
On the 29k, we must be able to place it in a delay slot, it must
not use sp if the frame pointer cannot be eliminated, and it cannot
use local regs if we need to push the register stack. */
use local regs if we need to push the register stack.
If this is a SET with a memory as source, it might load from
a stack slot, unless the address is constant. */
#define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN,N) \
(get_attr_in_delay_slot (INSN) == IN_DELAY_SLOT_YES \
&& ! (frame_pointer_needed \
&& reg_mentioned_p (stack_pointer_rtx, PATTERN (INSN))) \
&& ! (needs_regstack_p () && uses_local_reg_p (PATTERN (INSN))))
&& ! (needs_regstack_p () && uses_local_reg_p (PATTERN (INSN))) \
&& (GET_CODE (PATTERN (INSN)) != SET \
|| GET_CODE (SET_SRC (PATTERN (INSN))) != MEM \
|| ! rtx_varies_p (XEXP (SET_SRC (PATTERN (INSN)), 0))))
/* Output assembler code for a block containing the constant parts
of a trampoline, leaving space for the variable parts.