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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-01-30 06:48:12 -0500 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-01-30 06:48:12 -0500 |
| commit | b0d71df9409c7c7449b2969ce48f93061a6638c1 (patch) | |
| tree | e3ed4114e4ccc105c0ca9a2eda93e2f61932ed1d | |
| parent | 3f83ac49044ab7a3ac8420c4294edae820c9577e (diff) | |
| download | gcc-b0d71df9409c7c7449b2969ce48f93061a6638c1.zip gcc-b0d71df9409c7c7449b2969ce48f93061a6638c1.tar.gz gcc-b0d71df9409c7c7449b2969ce48f93061a6638c1.tar.bz2 | |
(nonzero_bits, case REG): Ignore REG_POINTER_ALIGNMENT.
Restore old code for SP, but use it for all pointers to defined locations in
the frame.
From-SVN: r11123
| -rw-r--r-- | gcc/combine.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index efcdea3..3e91601 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6921,25 +6921,30 @@ nonzero_bits (x, mode) nonzero &= GET_MODE_MASK (ptr_mode); #endif - /* We may know something about the alignment of this register. - But if PUSH_ROUNDING is defined, it is possible for the +#ifdef STACK_BOUNDARY + /* If this is the stack pointer, we may know something about its + alignment. If PUSH_ROUNDING is defined, it is possible for the stack to be momentarily aligned only to that amount, so we pick the least alignment. */ - if (REGNO_POINTER_ALIGN (REGNO (x)) != 0) + if (x == stack_pointer_rtx || x == frame_pointer_rtx + || x == arg_pointer_rtx || x == hard_frame_pointer_rtx + || (REGNO (x) >= FIRST_VIRTUAL_REGISTER + && REGNO (x) <= LAST_VIRTUAL_REGISTER)) { - int alignment = REGNO_POINTER_ALIGN (REGNO (x)); + int sp_alignment = STACK_BOUNDARY / BITS_PER_UNIT; #ifdef PUSH_ROUNDING if (REGNO (x) == STACK_POINTER_REGNUM) - alignment = MIN (PUSH_ROUNDING (1), alignment); + sp_alignment = MIN (PUSH_ROUNDING (1), sp_alignment); #endif /* We must return here, otherwise we may get a worse result from one of the choices below. There is nothing useful below as far as the stack pointer is concerned. */ - return nonzero &= ~ (alignment - 1); + return nonzero &= ~ (sp_alignment - 1); } +#endif /* If X is a register whose nonzero bits value is current, use it. Otherwise, if X is a register whose value we can find, use that |