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[binutils-gdb] RISC-V: Handle vector type alignment.
- From: Jim Wilson <wilson at sourceware dot org>
- To: gdb-cvs at sourceware dot org
- Date: 14 Nov 2018 22:55:29 -0000
- Subject: [binutils-gdb] RISC-V: Handle vector type alignment.
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=ef2de9e7eb19cf6f56c8378df82cab30ff741fe0
commit ef2de9e7eb19cf6f56c8378df82cab30ff741fe0
Author: Jim Wilson <jimw@sifive.com>
Date: Wed Nov 14 14:52:34 2018 -0800
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.
Diff:
---
gdb/ChangeLog | 4 ++++
gdb/riscv-tdep.c | 7 +++++++
2 files changed, 11 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 2406c1a..a918439 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,9 @@
2018-11-14 Jim Wilson <jimw@sifive.com>
+ * riscv-tdep.c (BIGGEST_ALIGNMENT): New.
+ (riscv_type_alignment) <TYPE_CODE_ARRAY>: If TYPE_VECTOR, return min
+ of TYPE_LENGTH and BIGGEST_ALIGNMENT.
+
* riscv-tdep.c (riscv_call_arg_scalar_int): Use std::min when
setting len. New local align, set to max of arg align and xlen,
and pass to first riscv_assign_stack_location call.
diff --git a/gdb/riscv-tdep.c b/gdb/riscv-tdep.c
index b59cc6e..92f8c6e 100644
--- a/gdb/riscv-tdep.c
+++ b/gdb/riscv-tdep.c
@@ -59,6 +59,9 @@
/* The stack must be 16-byte aligned. */
#define SP_ALIGNMENT 16
+/* The biggest alignment that the target supports. */
+#define BIGGEST_ALIGNMENT 16
+
/* Forward declarations. */
static bool riscv_has_feature (struct gdbarch *gdbarch, char feature);
@@ -1642,6 +1645,10 @@ riscv_type_alignment (struct type *t)
return TYPE_LENGTH (t);
case TYPE_CODE_ARRAY:
+ if (TYPE_VECTOR (t))
+ return std::min (TYPE_LENGTH (t), (unsigned) BIGGEST_ALIGNMENT);
+ /* FALLTHROUGH */
+
case TYPE_CODE_COMPLEX:
return riscv_type_alignment (TYPE_TARGET_TYPE (t));