diff options
| author | Richard Henderson <rth@twiddle.net> | 2016-06-23 20:34:33 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2016-08-05 21:44:40 +0530 |
| commit | 5a18407f55ade924aa6397c9a043a9ffd59645fe (patch) | |
| tree | 9d90c54eca81527f3f423e2daf7b29eccc32a35e /tcg/tcg.h | |
| parent | c0ef05b5e62ab0c291a94022f14104e61e306f03 (diff) | |
tcg: Lower indirect registers in a separate pass
Rather than rely on recursion during the middle of register allocation,
lower indirect registers to loads and stores off the indirect base into
plain temps.
For an x86_64 host, with sufficient registers, this results in identical
code, modulo the actual register assignments.
For an i686 host, with insufficient registers, this means that temps can
be (temporarily) spilled to the stack in order to satisfy an allocation.
This as opposed to the possibility of not being able to spill, to allocate
a register for the indirect base, in order to perform a spill.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/tcg.h')
| -rw-r--r-- | tcg/tcg.h | 4 |
1 files changed, 4 insertions, 0 deletions
@@ -617,6 +617,7 @@ struct TCGContext { int nb_labels; int nb_globals; int nb_temps; + int nb_indirects; /* goto_tb support */ tcg_insn_unit *code_buf; @@ -898,6 +899,9 @@ void tcg_gen_callN(TCGContext *s, void *func, TCGArg ret, int nargs, TCGArg *args); void tcg_op_remove(TCGContext *s, TCGOp *op); +TCGOp *tcg_op_insert_before(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg); +TCGOp *tcg_op_insert_after(TCGContext *s, TCGOp *op, TCGOpcode opc, int narg); + void tcg_optimize(TCGContext *s); /* only used for debugging purposes */ |