@@ -141,7 +141,7 @@ using insn_call_clobbers_tree = default_splay_tree<insn_call_clobbers_note *>;
// of "notes", a bit like REG_NOTES for the underlying RTL insns.
class insn_info
{
- // Size: 8 LP64 words.
+ // Size: 9 LP64 words.
friend class ebb_info;
friend class function_info;
@@ -401,10 +401,11 @@ private:
// The number of definitions and the number uses. FIRST_PSEUDO_REGISTER + 1
// is the maximum number of accesses to hard registers and memory, and
// MAX_RECOG_OPERANDS is the maximum number of pseudos that can be
- // defined by an instruction, so the number of definitions should fit
- // easily in 16 bits.
+ // defined by an instruction, so the number of definitions in a real
+ // instruction should fit easily in 16 bits. However, there are no
+ // limits on the number of definitions in artifical instructions.
unsigned int m_num_uses;
- unsigned int m_num_defs : 16;
+ unsigned int m_num_defs;
// Flags returned by the accessors above.
unsigned int m_is_debug_insn : 1;
@@ -414,7 +415,7 @@ private:
unsigned int m_has_volatile_refs : 1;
// For future expansion.
- unsigned int m_spare : 11;
+ unsigned int m_spare : 27;
// The program point at which the instruction occurs.
//
@@ -431,6 +432,9 @@ private:
// instruction.
mutable int m_cost_or_uid;
+ // On LP64 systems, there's a gap here that could be used for future
+ // expansion.
+
// The list of notes that have been attached to the instruction.
insn_note *m_first_note;
};