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authorMatt Arsenault <Matthew.Arsenault@amd.com>2015-11-30 21:15:53 +0000
committerMatt Arsenault <Matthew.Arsenault@amd.com>2015-11-30 21:15:53 +0000
commit0e3d38937e11408127c1ae07d89f5189df204405 (patch)
treecd773950ee36f9811b2a4c50a390a46398f26272 /lldb/packages/Python/lldbsuite/test/python_api/signals/main.cpp
parentff6da2fe894f52abcddd7bfbf2a211d51867eb88 (diff)
downloadbcm5719-llvm-0e3d38937e11408127c1ae07d89f5189df204405.tar.gz
bcm5719-llvm-0e3d38937e11408127c1ae07d89f5189df204405.zip
AMDGPU: Remove SIPrepareScratchRegs
It does not work because of emergency stack slots. This pass was supposed to eliminate dummy registers for the spill instructions, but the register scavenger can introduce more during PrologEpilogInserter, so some would end up left behind if they were needed. The potential for spilling the scratch resource descriptor and offset register makes doing something like this overly complicated. Reserve registers to use for the resource descriptor and use them directly in eliminateFrameIndex. Also removes creating another scratch resource descriptor when directly selecting scratch MUBUF instructions. The choice of which registers are reserved is temporary. For now it attempts to pick the next available registers after the user and system SGPRs. llvm-svn: 254329
Diffstat (limited to 'lldb/packages/Python/lldbsuite/test/python_api/signals/main.cpp')
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