bcm5719-llvm - Project Ortega BCM5719 LLVM

	Commit message (Collapse)	Author	Age	Files	Lines
*	AMDGPU: Look through a bitcast user of an out argument	Matt Arsenault	2017-07-28	1	-2/+17
\| \| \| \| \| \| \| \| \| \| \| \| \| \|	This allows handling of a lot more of the interesting cases in Blender. Most of the large functions unlikely to be inlined have this pattern. This is a special case for what clang emits for OpenCL 3 element vectors. Annoyingly, these are emitted as <3 x elt>* pointers, but accessed as <4 x elt>* operations. This also needs to handle cases where a struct containing a single vector is used. llvm-svn: 309419
*	AMDGPU: Add pass to replace out arguments	Matt Arsenault	2017-07-28	1	-0/+22
	It is better to return arguments directly in registers if we are making a call rather than introducing expensive stack usage. In one of sample compile from one of Blender's many kernel variants, this fires on about ~20 different functions. Future improvements may be to recognize simple cases where the pointer is indexing a small array. This also fails when the store to the out argument is in a separate block from the return, which happens in a few of the Blender functions. This should also probably be using MemorySSA which might help with that. I'm not sure this is correct as a FunctionPass, but MemoryDependenceAnalysis seems to not work with a ModulePass. I'm also not sure where it should run.I think it should run before DeadArgumentElimination, so maybe either EP_CGSCCOptimizerLate or EP_ScalarOptimizerLate. llvm-svn: 309416