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authorRichard Henderson <rth@twiddle.net>2016-06-22 14:24:32 -0700
committerRichard Henderson <rth@twiddle.net>2016-08-05 21:44:40 +0530
commitc0ef05b5e62ab0c291a94022f14104e61e306f03 (patch)
treea67d31b37f2748ab56e19493010e1d93785cfc44 /tcg
parentbdfb460ef77500f7b186759b585f06ff2120929d (diff)
tcg: Require liveness analysis
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/tcg.c21
1 files changed, 0 insertions, 21 deletions
diff --git a/tcg/tcg.c b/tcg/tcg.c
index b0a88bae3a..3c1f5262a8 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -23,7 +23,6 @@
*/
/* define it to use liveness analysis (better code) */
-#define USE_LIVENESS_ANALYSIS
#define USE_TCG_OPTIMIZATIONS
#include "qemu/osdep.h"
@@ -1337,8 +1336,6 @@ void tcg_op_remove(TCGContext *s, TCGOp *op)
#endif
}
-#ifdef USE_LIVENESS_ANALYSIS
-
#define TS_DEAD 1
#define TS_MEM 2
@@ -1595,18 +1592,6 @@ static void tcg_liveness_analysis(TCGContext *s)
op->life = arg_life;
}
}
-#else
-/* dummy liveness analysis */
-static void tcg_liveness_analysis(TCGContext *s)
-{
- int nb_ops = s->gen_next_op_idx;
-
- s->op_dead_args = tcg_malloc(nb_ops * sizeof(uint16_t));
- memset(s->op_dead_args, 0, nb_ops * sizeof(uint16_t));
- s->op_sync_args = tcg_malloc(nb_ops * sizeof(uint8_t));
- memset(s->op_sync_args, 0, nb_ops * sizeof(uint8_t));
-}
-#endif
#ifdef CONFIG_DEBUG_TCG
static void dump_regs(TCGContext *s)
@@ -1858,7 +1843,6 @@ static void temp_load(TCGContext *s, TCGTemp *ts, TCGRegSet desired_regs,
temporary registers needs to be allocated to store a constant. */
static void temp_save(TCGContext *s, TCGTemp *ts, TCGRegSet allocated_regs)
{
-#ifdef USE_LIVENESS_ANALYSIS
/* ??? Liveness does not yet incorporate indirect bases. */
if (!ts->indirect_base) {
/* The liveness analysis already ensures that globals are back
@@ -1866,7 +1850,6 @@ static void temp_save(TCGContext *s, TCGTemp *ts, TCGRegSet allocated_regs)
tcg_debug_assert(ts->val_type == TEMP_VAL_MEM || ts->fixed_reg);
return;
}
-#endif
temp_sync(s, ts, allocated_regs, 1);
}
@@ -1891,7 +1874,6 @@ static void sync_globals(TCGContext *s, TCGRegSet allocated_regs)
for (i = 0; i < s->nb_globals; i++) {
TCGTemp *ts = &s->temps[i];
-#ifdef USE_LIVENESS_ANALYSIS
/* ??? Liveness does not yet incorporate indirect bases. */
if (!ts->indirect_base) {
tcg_debug_assert(ts->val_type != TEMP_VAL_REG
@@ -1899,7 +1881,6 @@ static void sync_globals(TCGContext *s, TCGRegSet allocated_regs)
|| ts->mem_coherent);
continue;
}
-#endif
temp_sync(s, ts, allocated_regs, 0);
}
}
@@ -1915,7 +1896,6 @@ static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs)
if (ts->temp_local) {
temp_save(s, ts, allocated_regs);
} else {
-#ifdef USE_LIVENESS_ANALYSIS
/* ??? Liveness does not yet incorporate indirect bases. */
if (!ts->indirect_base) {
/* The liveness analysis already ensures that temps are dead.
@@ -1923,7 +1903,6 @@ static void tcg_reg_alloc_bb_end(TCGContext *s, TCGRegSet allocated_regs)
tcg_debug_assert(ts->val_type == TEMP_VAL_DEAD);
continue;
}
-#endif
temp_dead(s, ts);
}
}