gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-07 23:24:09 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Add stricter check for sinking PHIs.

Browse Source
This commit is contained in:
Mike Pall 2012-07-04 11:41:58 +02:00
parent 4da7ffc34b
commit c22d698e17
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
src/lj_opt_sink.c
View File

@ -47,7 +47,7 @@ static int sink_phidep(jit_State *J, IRRef ref)
return 0;
}
/* Check whether a value is a sinkable PHI or a non-PHI. */
/* Check whether a value is a sinkable PHI or loop-invariant. */
static int sink_checkphi(jit_State *J, IRIns *ira, IRRef ref)
{
if (ref >= REF_FIRST) {
@ -57,7 +57,8 @@ static int sink_checkphi(jit_State *J, IRIns *ira, IRRef ref)
ira->prev++;
return 1; /* Sinkable PHI. */
}
return !sink_phidep(J, ref); /* Must be a non-PHI then. */
/* Otherwise the value must be loop-invariant. */
return ref < J->loopref && !sink_phidep(J, ref);
}
return 1; /* Constant (non-PHI). */
}