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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1997-11-09 08:59:55 +0000 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 1997-11-09 01:59:55 -0700 |
| commit | 7091039c6802a601e5dc52cf2d932eeeef375e9c (patch) | |
| tree | 76286ec4bd6a2cdb041d24f2479b4632fe025b6e | |
| parent | 553914ad8b7f0ae4a1b22694f35e7380c4051520 (diff) | |
| download | gcc-7091039c6802a601e5dc52cf2d932eeeef375e9c.zip gcc-7091039c6802a601e5dc52cf2d932eeeef375e9c.tar.gz gcc-7091039c6802a601e5dc52cf2d932eeeef375e9c.tar.bz2 | |
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
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/a29k/a29k.h | 9 |
2 files changed, 12 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6b2ac81..2541b83 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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 diff --git a/gcc/config/a29k/a29k.h b/gcc/config/a29k/a29k.h index 59e9a13..db6e378 100644 --- a/gcc/config/a29k/a29k.h +++ b/gcc/config/a29k/a29k.h @@ -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. |