5 Commits

Author	SHA1	Message	Date
Jay Foad	d28624a209	[AMDGPU] Stop adding an implicit def of vcc_hi for wave32 ... This doesn't seem to be needed for anything. Differential Revision: https://reviews.llvm.org/D92400	2020-12-02 10:11:42 +00:00
Sebastian Neubauer	a343b9b032	Revert "[AMDGPU] Insert waitcnt after returning from call" ... This reverts commit ca907bfb57. According to michel.daenzer, > This completely broke the Mesa radeonsi driver on Navi 14. Xorg + > xterm come up with major corruption & psychedelic colours.	2020-09-23 17:16:39 +02:00
Sebastian Neubauer	ca907bfb57	[AMDGPU] Insert waitcnt after returning from call ... When memory operations are outstanding on function calls, either the caller or the callee can insert a waitcnt to ensure that all reads are finished. Calls need some time to be executed, so if the callee inserts the waitcnt, filling the instruction buffer and waiting for memory will be interleaved, hiding some latency. This comes at the cost of having a waitcnt inside functions that may not be needed as no memory operations are outstanding. For function calls, this is already implemented. The same principal applies to returns: If the caller inserts a waitcnt after the call, the callee does not have to wait and the return and memory operation can be run in parallel. This commit implements waiting in the caller after returning from a function call. Differential Revision: https://reviews.llvm.org/D87674	2020-09-23 12:17:59 +02:00
Stanislav Mekhanoshin	9a9a092e61	[AMDGPU] Avoid sorting stalls in regbank-reassign ... This is the slowest operation in the already slow pass. Instead of sorting just put a stall list into an ordered map. Differential Revision: https://reviews.llvm.org/D86253	2020-08-21 11:49:41 -07:00
Sebastian Neubauer	29a6ad94fd	[AMDGPU] Add G16 support to image instructions ... Add G16 feature for GFX10 and support A16 and G16 in GlobalISel. Differential Revision: https://reviews.llvm.org/D76836	2020-06-12 11:26:31 +02:00