Remove long_long_align_bit gdbarch attribute

This removes the long_long_align_bit gdbarch attribute in favor of
type_align.  This uncovered two possible issues.

First, arc-tdep.c claimed that long long alignment was 32 bits, but as
discussed on the list, ARC has a maximum alignment of 32 bits, so I've
added an arc_type_align function to account for this.

Second, jit.c, the sole user of long_long_align_bit, was confusing
"long long" with uint64_t.  The relevant structure is defined in the
JIT API part of the manual as:

     struct jit_code_entry
     {
       struct jit_code_entry *next_entry;
       struct jit_code_entry *prev_entry;
       const char *symfile_addr;
       uint64_t symfile_size;
     };

I've changed this code to use uint64_t.

2018-04-30  Tom Tromey  <tom@tromey.com>

	* jit.c (jit_read_code_entry): Use type_align.
	* i386-tdep.c (i386_gdbarch_init): Don't call
	set_gdbarch_long_long_align_bit.
	* gdbarch.sh: Remove long_long_align_bit.
	* gdbarch.c, gdbarch.h: Rebuild.
	* arc-tdep.c (arc_type_align): New function.
	(arc_gdbarch_init): Use arc_type_align.  Don't call
	set_gdbarch_long_long_align_bit.

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/jit.c b/gdb/jit.c
index 2f23c05..8cd645c 100644
--- a/gdb/jit.c
+++ b/gdb/jit.c
@@ -413,8 +413,8 @@ jit_read_code_entry (struct gdbarch *gdbarch,
   ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
   ptr_size = TYPE_LENGTH (ptr_type);
 
-  /* Figure out where the longlong value will be.  */
-  align_bytes = gdbarch_long_long_align_bit (gdbarch) / 8;
+  /* Figure out where the uint64_t value will be.  */
+  align_bytes = type_align (builtin_type (gdbarch)->builtin_uint64);
   off = 3 * ptr_size;
   off = (off + (align_bytes - 1)) & ~(align_bytes - 1);