Commit Graph

4 Commits

Author SHA1 Message Date
Brian Gesiak 4ef3daafef [ORE] Add diagnostics hotness threshold
Summary:
Add an option to prevent diagnostics that do not meet a minimum hotness
threshold from being output. When generating optimization remarks for
large codebases with a ton of cold code paths, this option can be used
to limit the optimization remark output at a reasonable size. Discussion of
this change can be read here:
http://lists.llvm.org/pipermail/llvm-dev/2017-June/114377.html

Reviewers: anemet, davidxl, hfinkel

Reviewed By: anemet

Subscribers: qcolombet, javed.absar, fhahn, eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D34867

llvm-svn: 306912
2017-06-30 23:14:53 +00:00
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