[gcc r14-9661] MIPS: Predefine __mips_strict_alignment if STRICT_ALIGNMENT

[YunQiang Su]

https://gcc.gnu.org/g:bb819067b3037dbc847aef6c46b8dc6cd5b50962

commit r14-9661-gbb819067b3037dbc847aef6c46b8dc6cd5b50962
Author: YunQiang Su <syq@gcc.gnu.org>
Date:   Wed Mar 20 16:25:04 2024 +0800

    MIPS: Predefine __mips_strict_alignment if STRICT_ALIGNMENT
    
    Arm32 predefines __ARM_FEATURE_UNALIGNED if -mno-unaligned-access,
    and RISC-V predefines __riscv_misaligned_avoid.
    
    Let's define __mips_strict_alignment for MIPSr6 and -mstrict-align
    is used.
    
    Note that, this macro is always defined for pre-R6.
    
    gcc
            * config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Predefine
            __mips_strict_alignment if STRICT_ALIGNMENT.

Diff:
---
 gcc/config/mips/mips.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 6444a68dfd5..616a275b918 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -694,6 +694,9 @@ struct mips_cpu_info {
 	builtin_define ("__mips_compact_branches_always");		\
       else 								\
 	builtin_define ("__mips_compact_branches_optimal");		\
+									\
+      if (STRICT_ALIGNMENT)						\
+	builtin_define ("__mips_strict_alignment");			\
     }									\
   while (0)