550370 - lots of aborts on voxel rendering demo

Status: NEW

(Core :: JavaScript Engine, defect)

Description

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Here's TMFLAGS=abort:

Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:138@928: No compatible inner tree.
Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:138@928: No compatible inner tree.
Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:138@928: No compatible inner tree.
Abort recording of tree http://voxel.onaluf.org/render.js:95@9 at http://voxel.onaluf.org/render.js:104@159: No compatible inner tree.
Abort recording of tree http://voxel.onaluf.org/render.js:95@9 at http://voxel.onaluf.org/render.js:146@1144: Inner tree is trying to grow, abort outer recording.
Abort recording of tree http://voxel.onaluf.org/render.js:95@9 at http://voxel.onaluf.org/render.js:118@537: Inner tree is trying to grow, abort outer recording.
Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:138@928: No compatible inner tree.
Abort recording of tree http://voxel.onaluf.org/render.js:95@9 at http://voxel.onaluf.org/render.js:118@537: Inner tree is trying to grow, abort outer recording.
Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:139@973: Inner tree is trying to grow, abort outer recording.
Abort recording of tree http://voxel.onaluf.org/render.js:95@9 at http://voxel.onaluf.org/render.js:118@537: Inner tree is trying to grow, abort outer recording.
Abort recording of tree http://voxel.onaluf.org/render.js:104@159 at http://voxel.onaluf.org/render.js:139@973: Inner tree is trying to grow, abort outer recording.
trace stopped: 3531: non-stub getter
trace stopped: 12736: name() not accessing a valid slot

(8fps vs. 40fps in chrome)

Comment 1

[Andreas Gal :gal]

Deeply nested loop. We fail in the innermost loop, so that propagates outwards. We have to figure out why NAME isn't traced there.

Comment 2

[Boris Zbarsky [:bzbarsky]]

For what it's worth, I don't see the name() fail that vlad's seeing...  All the aborts I see are inner tree trying to grow or no compatible inner tree.  Those shouldn't cause blacklisting, right?  I also see lots and lots of LOOP exits (tens of thousands), even if I get rid of all the MISMATCH exits.  See bug 550391