tcg: Use per-temp state data in liveness

This avoids having to allocate external memory for each temporary.

Reviewed-by: Emilio G. Cota <cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 6 insertions, 0 deletions

diff --git a/tcg/tcg.h b/tcg/tcg.h
index 828c1e7..0a0bc92 100644
--- a/tcg/tcg.h
+++ b/tcg/tcg.h
@@ -592,6 +592,12 @@ typedef struct TCGTemp {
     struct TCGTemp *mem_base;
     intptr_t mem_offset;
     const char *name;
+
+    /* Pass-specific information that can be stored for a temporary.
+       One word worth of integer data, and one pointer to data
+       allocated separately.  */
+    uintptr_t state;
+    void *state_ptr;
 } TCGTemp;
 
 typedef struct TCGContext TCGContext;