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| author | Richard Stallman <rms@gnu.org> | 1992-10-05 06:27:12 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-10-05 06:27:12 +0000 |
| commit | 86b25e81b92c5b7cc9d8855a0343aa676dc750b0 (patch) | |
| tree | 99a602daff56c34a482cc75afc7e72acfbf03553 /gcc/explow.c | |
| parent | 8c24a2ce8cb330111e87779990c5ff118675f22c (diff) | |
| download | gcc-86b25e81b92c5b7cc9d8855a0343aa676dc750b0.zip gcc-86b25e81b92c5b7cc9d8855a0343aa676dc750b0.tar.gz gcc-86b25e81b92c5b7cc9d8855a0343aa676dc750b0.tar.bz2 | |
(allocate_dynamic_stack_space) [MUST_ALIGN]:
Always add to size, always round up to STACK_BOUNDARY,
always round the address.
From-SVN: r2320
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index 4d7d5c5..0bc635b 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -865,7 +865,10 @@ allocate_dynamic_stack_space (size, target, known_align) #ifdef MUST_ALIGN -#if !defined (STACK_DYNAMIC_OFFSET) && !defined (STACK_POINTER_OFFSET) +#if 0 /* It turns out we must always make extra space, if MUST_ALIGN + because we must always round the address up at the end, + because we don't know whether the dynamic offset + will mess up the desired alignment. */ /* If we have to round the address up regardless of known_align, make extra space regardless, also. */ if (known_align % BIGGEST_ALIGNMENT != 0) @@ -912,8 +915,9 @@ allocate_dynamic_stack_space (size, target, known_align) momentarily mis-aligning the stack. */ #ifdef STACK_BOUNDARY -#ifndef SETJMP_VIA_SAVE_AREA /* If we added a variable amount to SIZE, - we can no longer assume it is aligned. */ + /* If we added a variable amount to SIZE, + we can no longer assume it is aligned. */ +#if !defined (SETJMP_VIA_SAVE_AREA) && !defined (MUST_ALIGN) if (known_align % STACK_BOUNDARY != 0) #endif size = round_push (size); @@ -957,9 +961,9 @@ allocate_dynamic_stack_space (size, target, known_align) #endif #ifdef MUST_ALIGN - /* If virtual_stack_dynamic_rtx might not share the alignment of - the stack pointer register, we must always realign the stack address. */ -#if !defined (STACK_DYNAMIC_OFFSET) && !defined (STACK_POINTER_OFFSET) +#if 0 /* Even if we know the stack pointer has enough alignment, + there's no way to tell whether virtual_stack_dynamic_rtx shares that + alignment, so we still need to round the address up. */ if (known_align % BIGGEST_ALIGNMENT != 0) #endif { |