06535: gradius4: Background graphics corruption in stage 3.

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06535	Graphics	Minor	Always	Apr 13, 2017, 19:43	Apr 30, 2017, 10:32

Tester	pat33999	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Confirmed			Driver	konami/hornet.cpp
Version	0.184	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06535: gradius4: Background graphics corruption in stage 3.
Description	Specific polygons (or textures) along the lower half of the screen are displayed incorrectly. They contain wrong colors, and don't fully appear until completely onscreen.
Steps To Reproduce	Play until you reach stage 3. About 20 seconds in, the music and background will change, and the corruption begins to occur. I wanted to attach a MAME 0.184 64-bit save state, but its too big, so I uploaded it to Dropbox. https://www.dropbox.com/s/2vdj8522327q4yv/a.sta?dl=0
Additional Information
Github Commit

Flags
Regression Version	0.175
Affected Sets / Systems	gradius4

Attached Files	0000.png (66,509 bytes) Apr 13, 2017, 19:43 Uploaded by pat33999
	0004.png (99,821 bytes) Apr 13, 2017, 19:45 Uploaded by pat33999
	gradius4.zip (1,720,862 bytes) Apr 13, 2017, 19:49 Uploaded by pat33999 Video file showing the glitch occuring.

No.13782 Tafoid Administrator Apr 13, 2017, 20:19	Confirmed using offered Save State. Are you 100% positive of the regression version (working in 0.174 and not in 0.175) ?
No.13783 pat33999 Tester Apr 13, 2017, 20:33	Yes, I checked and double checked everything. I can also upload save states for 0.174 and 0.175 if necessary.
No.13805 Osso Moderator Apr 30, 2017, 08:50	With the recompiler disabled it doesn't reproduce.
No.13806 Haze Senior Tester Apr 30, 2017, 10:32	Sharc recompiler? would make sense for the timeframe I think?