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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
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Mark kernels that use certain features that require user
SGPRs to support with kernel attributes. We need to know
before instruction selection begins because it impacts
the kernel calling convention lowering.
For now this only detects the workitem intrinsics.
llvm-svn: 252323
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llvm-svn: 251995
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The pass adds new kernel arguments for image attributes, and
resolves calls to dummy attribute and resource id getter functions.
Patch by: Zoltan Gilian
llvm-svn: 244372
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llvm-svn: 239657
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This reverts commit 4ea70107c5e51230e9e60f0bf58a0f74aa4885ea.
llvm-svn: 160303
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llvm-svn: 160270
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