4 Commits

Author	SHA1	Message	Date
Carl Ritson	2791667d2e	[DAGCombiner] Check term use before applying aggressive FSUB optimisations ... Summary: Without this check unnecessary FMA instructions are generated when the FSUB terms are reused. This also has the side-effect that the same value is computed to different levels of precision, which can create undesirable effects if the results are used together in subsequent computation. Reviewers: arsenm, nhaehnle, foad, tpr, dstuttard, spatel Reviewed By: arsenm Subscribers: jvesely, wdng, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D71656	2019-12-23 09:37:58 +09:00
Matt Arsenault	6c29c5acfe	AMDGPU: Allow SIShrinkInstructions to work in non-SSA ... Immediates can be folded as long as the immediate is a vreg. Also undo commuting instructions if it didn't fold an immediate. llvm-svn: 307575	2017-07-10 19:53:57 +00:00
Matt Arsenault	3dbeefa978	AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel ... Currently the default C calling convention functions are treated the same as compute kernels. Make this explicit so the default calling convention can be changed to a non-kernel. Converted with perl -pi -e 's/define void/define amdgpu_kernel void/' on the relevant test directories (and undoing in one place that actually wanted a non-kernel). llvm-svn: 298444	2017-03-21 21:39:51 +00:00
Matt Arsenault	e482403e1c	DAGCombiner: Add hasOneUse checks to fadd/fma combine ... Even with aggressive fusion enabled, this requires duplicating the fmul, or increases an fadd to another fma which is not an improvement. llvm-svn: 291642	2017-01-11 02:02:12 +00:00