RISC-V: Handle vector type alignment.
For riscv64-linux target, first half of fix for FAIL: gdb.base/gnu_vector.exp: call add_various_floatvecs GCC gives vectors natural aligment based on total size, not element size, bounded by the maximum supported type alignment. gdb/ * riscv-tdep.c (BIGGEST_ALIGNMENT): New. (riscv_type_alignment) <TYPE_CODE_ARRAY>: If TYPE_VECTOR, return min of TYPE_LENGTH and BIGGEST_ALIGNMENT.
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2018-11-14 Jim Wilson <jimw@sifive.com>
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* riscv-tdep.c (BIGGEST_ALIGNMENT): New.
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(riscv_type_alignment) <TYPE_CODE_ARRAY>: If TYPE_VECTOR, return min
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of TYPE_LENGTH and BIGGEST_ALIGNMENT.
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* riscv-tdep.c (riscv_call_arg_scalar_int): Use std::min when
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setting len. New local align, set to max of arg align and xlen,
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and pass to first riscv_assign_stack_location call.
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@ -59,6 +59,9 @@
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/* The stack must be 16-byte aligned. */
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#define SP_ALIGNMENT 16
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/* The biggest alignment that the target supports. */
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#define BIGGEST_ALIGNMENT 16
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/* Forward declarations. */
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static bool riscv_has_feature (struct gdbarch *gdbarch, char feature);
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@ -1642,6 +1645,10 @@ riscv_type_alignment (struct type *t)
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return TYPE_LENGTH (t);
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case TYPE_CODE_ARRAY:
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if (TYPE_VECTOR (t))
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return std::min (TYPE_LENGTH (t), (unsigned) BIGGEST_ALIGNMENT);
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/* FALLTHROUGH */
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case TYPE_CODE_COMPLEX:
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return riscv_type_alignment (TYPE_TARGET_TYPE (t));
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