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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/soft-fp | |
| parent | 160799b366c33246ca16b84020ec49c3feabb0a3 (diff) | |
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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/soft-fp')
| -rw-r--r-- | libgcc/soft-fp/bitint.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libgcc/soft-fp/bitint.h b/libgcc/soft-fp/bitint.h index 20cd41b..cb4d822 100644 --- a/libgcc/soft-fp/bitint.h +++ b/libgcc/soft-fp/bitint.h @@ -33,19 +33,19 @@ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see #if BIL_UNITS_PER_WORD == 8 #define BIL_TYPE_SIZE (8 * __CHAR_BIT__) #define BILtype DItype -#define UBILtype UDItype +typedef UDItype __attribute__ ((__may_alias__)) UBILtype; #elif BIL_UNITS_PER_WORD == 4 #define BIL_TYPE_SIZE (4 * __CHAR_BIT__) #define BILtype SItype -#define UBILtype USItype +typedef USItype __attribute__ ((__may_alias__)) UBILtype; #elif BIL_UNITS_PER_WORD == 2 #define BIL_TYPE_SIZE (2 * __CHAR_BIT__) #define BILtype HItype -#define UBILtype UHItype +typedef UHItype __attribute__ ((__may_alias__)) UBILtype; #else #define BIL_TYPE_SIZE __CHAR_BIT__ #define BILtype QItype -#define UBILtype UQItype +typedef UQItype __attribute__ ((__may_alias__)) UBILtype; #endif /* If *P is zero or sign extended (the latter only for PREC < 0) from |