Reorganize scalar evolution analysis.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/lj_jit.h b/src/lj_jit.h
index 3201baf0..bd7c7577 100644
--- a/src/lj_jit.h
+++ b/src/lj_jit.h
@@ -201,6 +201,16 @@ typedef struct BPropEntry {
 /* Number of slots for the backpropagation cache. Must be a power of 2. */
 #define BPROP_SLOTS     16
 
+/* Scalar evolution analysis cache. */
+typedef struct ScEvEntry {
+  IRRef1 idx;           /* Index reference. */
+  IRRef1 start;         /* Constant start reference. */
+  IRRef1 stop;          /* Constant stop reference. */
+  IRRef1 step;          /* Constant step reference. */
+  IRType1 t;            /* Scalar type. */
+  uint8_t dir;          /* Direction. 0: +, 1: -. */
+} ScEvEntry;
+
 /* 128 bit SIMD constants. */
 enum {
   LJ_KSIMD_ABS,
@@ -283,6 +293,8 @@ typedef struct jit_State {
   BPropEntry bpropcache[BPROP_SLOTS];  /* Backpropagation cache slots. */
   uint32_t bpropslot;   /* Round-robin index into bpropcache slots. */
 
+  ScEvEntry scev;       /* Scalar evolution analysis cache slots. */
+
   const BCIns *startpc; /* Bytecode PC of starting instruction. */
   TraceNo parent;       /* Parent of current side trace (0 for root traces). */
   ExitNo exitno;        /* Exit number in parent of current side trace. */