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Author SHA1 Message Date
Adam Nemet 916923e689 [llc] Add -pass-remarks-output 
This is the opt/llc counterpart of -fsave-optimization-record to output
optimization remarks in a YAML file.

llvm-svn: 293121
 2017-01-26 00:39:51 +00:00
Adam Nemet 2ada300821 [llc] Add -pass-remarks-with-hotness 
Analogous to the code in opt, this enables hotness in opt-remarks.

llvm-svn: 293113
 2017-01-25 23:55:59 +00:00
Adam Nemet a964066705 New OptimizationRemarkEmitter pass for MIR 
This allows MIR passes to emit optimization remarks with the same level
of functionality that is available to IR passes.

It also hooks up the greedy register allocator to report spills.  This
allows for interesting use cases like increasing interleaving on a loop
until spilling of registers is observed.

I still need to experiment whether reporting every spill scales but this
demonstrates for now that the functionality works from llc
using -pass-remarks*=<pass>.

Differential Revision: https://reviews.llvm.org/D29004

llvm-svn: 293110
 2017-01-25 23:20:33 +00:00