diff options
author | Mike Pall <mike> | 2014-11-28 20:20:12 +0100 |
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committer | Mike Pall <mike> | 2014-11-28 20:20:12 +0100 |
commit | c75c62b489ebd0b4f9eb35af3b7d5a071939721e (patch) | |
tree | 433d787b37a1c9c2c6dec6e146f3d6f786f6dc56 /src/lj_asm.c | |
parent | a31c317fb59964be6ab4414fbaea4abebef1c0f5 (diff) | |
download | luajit2-c75c62b489ebd0b4f9eb35af3b7d5a071939721e.tar.gz |
Fix snapshot #0 handling for traces with a stack check on entry.
Diffstat (limited to 'src/lj_asm.c')
-rw-r--r-- | src/lj_asm.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/lj_asm.c b/src/lj_asm.c index 2afa92d0..f15458b9 100644 --- a/src/lj_asm.c +++ b/src/lj_asm.c @@ -1373,6 +1373,11 @@ static void asm_head_side(ASMState *as) int pass3 = 0; IRRef i; + if (as->snapno && as->topslot > as->parent->topslot) { + /* Force snap #0 alloc to prevent register overwrite in stack check. */ + as->snapno = 0; + asm_snap_alloc(as); + } allow = asm_head_side_base(as, irp, allow); /* Scan all parent SLOADs and collect register dependencies. */ |