From: Arthur Huillet <arthur.huil...@free.fr>
Those functions will be used by the register allocator when doing
control flow resolution.
Signed-off-by: Arthur Huillet <arthur.huil...@free.fr>
---
include/jit/vars.h | 4 +++-
jit/interval.c | 33 +++++++++++++++++++++++++++++++++
2 files changed, 36 insertions(+), 1 deletions(-)
diff --git a/include/jit/vars.h b/include/jit/vars.h
index 482f10a..b567116 100644
--- a/include/jit/vars.h
+++ b/include/jit/vars.h
@@ -4,6 +4,7 @@
#include "lib/list.h"
#include "arch/registers.h"
#include "vm/types.h"
+#include "compilation-unit.h"
#include <stdbool.h>
#include <assert.h>
@@ -111,5 +112,6 @@ struct live_interval *alloc_interval(struct var_info *);
void free_interval(struct live_interval *);
struct live_interval *split_interval_at(struct live_interval *, unsigned long
pos);
unsigned long next_use_pos(struct live_interval *, unsigned long);
-
+struct live_interval *vreg_start_interval(struct compilation_unit *, unsigned
long);
+struct live_interval *interval_child_at(struct live_interval *, unsigned long);
#endif /* __JIT_VARS_H */
diff --git a/jit/interval.c b/jit/interval.c
index e450b94..03da977 100644
--- a/jit/interval.c
+++ b/jit/interval.c
@@ -121,3 +121,36 @@ unsigned long next_use_pos(struct live_interval *it,
unsigned long pos)
return min;
}
+
+struct live_interval *vreg_start_interval(struct compilation_unit *cu,
unsigned long vreg)
+{
+ struct var_info *var;
+
+ var = cu->var_infos;
+
+ while (var) {
+ if (var->vreg == vreg)
+ break;
+
+ var = var->next;
+ }
+
+ if (var == NULL)
+ return NULL;
+
+ return var->interval;
+}
+
+struct live_interval *interval_child_at(struct live_interval *parent, unsigned
long pos)
+{
+ struct live_interval *it = parent;
+
+ while (it) {
+ if (in_range(&it->range, pos))
+ return it;
+
+ it = it->next_child;
+ }
+
+ return NULL;
+}
--
1.6.3.3
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