https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68263
H.J. Lu <hjl.tools at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-11-11
Depends on| |66250
Ever confirmed|0 |1
--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Uroš Bizjak from comment #3)
> (In reply to H.J. Lu from comment #2)
> > The maximum stack alignment is 4 byte for IA MCU. That is why
> > reload generates misaligned load/store.
>
> It looks to me that BIGGEST_ALIGNMENT is defined in a wrong way. If you want
> to use SSE with TARGET_IAMCU, then it needs to be defined to 128.
We can't change BIGGEST_ALIGNMENT due to PR 66250. Alignment of
long long is 4 byte for IA MCU. But alignment of long long can't be
changed. With
#define BIGGEST_ALIGNMENT \
(TARGET_AVX512F ? 512 \
: (TARGET_AVX ? 256 \
: (TARGET_SSE ? 128 \
: (TARGET_IAMCU ? 32 : 128))))
I got:
[hjl@gnu-tools-1 gcc]$ cat x.i
int x = __alignof__(long long);
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -S -m32 x.i -miamcu
[hjl@gnu-tools-1 gcc]$ cat x.s
.file "x.i"
.globl x
.data
.align 4
.type x, @object
.size x, 4
x:
.long 8
.ident "GCC: (GNU) 6.0.0 20151110 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$ ./xgcc -B./ -S -m32 x.i
[hjl@gnu-tools-1 gcc]$ cat x.s
.file "x.i"
.globl x
.data
.align 4
.type x, @object
.size x, 4
x:
.long 8
.ident "GCC: (GNU) 6.0.0 20151110 (experimental)"
.section .note.GNU-stack,"",@progbits
[hjl@gnu-tools-1 gcc]$
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66250
[Bug 66250] Can't adjust complex nor decimal floating point modes
