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| author | Jakub Jelinek <jakub@redhat.com> | 2024-01-12 10:10:20 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2024-01-12 10:10:20 +0100 |
| commit | 6dece9913f459f46c86d383e0da2ea544ce73f63 (patch) | |
| tree | 8e04bace0c9162ea72c9bdfeed1a24a85c23556a /libgcc/libgcc2.h | |
| parent | 160799b366c33246ca16b84020ec49c3feabb0a3 (diff) | |
| download | gcc-6dece9913f459f46c86d383e0da2ea544ce73f63.zip gcc-6dece9913f459f46c86d383e0da2ea544ce73f63.tar.gz gcc-6dece9913f459f46c86d383e0da2ea544ce73f63.tar.bz2 | |
libgcc: Use may_alias attribute in bitint handlers
As discussed on IRC, the following patch uses may_alias attribute, so that
on targets like aarch64 where abi_limb_mode != limb_mode the library
accesses the limbs (half limbs of the ABI) in the arrays with conservative
alias set.
2024-01-12 Jakub Jelinek <jakub@redhat.com>
* libgcc2.h (UBILtype): New typedef with may_alias attribute.
(__mulbitint3, __divmodbitint4): Use UBILtype * instead of
UWtype * and const UBILtype * instead of const UWtype *.
* libgcc2.c (bitint_reduce_prec, bitint_mul_1, bitint_addmul_1,
__mulbitint3, bitint_negate, bitint_submul_1, __divmodbitint4):
Likewise.
* soft-fp/bitint.h (UBILtype): Change define into a typedef with
may_alias attribute.
Diffstat (limited to 'libgcc/libgcc2.h')
| -rw-r--r-- | libgcc/libgcc2.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/libgcc/libgcc2.h b/libgcc/libgcc2.h index c4ee965..5050456 100644 --- a/libgcc/libgcc2.h +++ b/libgcc/libgcc2.h @@ -402,10 +402,12 @@ extern UDWtype __udivmoddi4 (UDWtype, UDWtype, UDWtype *); #if (defined(__BITINT_MAXWIDTH__) \ && (defined(L_mulbitint3) || defined(L_divmodbitint4))) /* _BitInt support. */ -extern void __mulbitint3 (UWtype *, SItype, const UWtype *, SItype, - const UWtype *, SItype); -extern void __divmodbitint4 (UWtype *, SItype, UWtype *, SItype, - const UWtype *, SItype, const UWtype *, SItype); +typedef UWtype __attribute__((__may_alias__)) UBILtype; +extern void __mulbitint3 (UBILtype *, SItype, const UBILtype *, SItype, + const UBILtype *, SItype); +extern void __divmodbitint4 (UBILtype *, SItype, UBILtype *, SItype, + const UBILtype *, SItype, const UBILtype *, + SItype); #endif /* __negdi2 is static inline when building other libgcc2 portions. */ |