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3 Commits

Author SHA1 Message Date
Xinliang David Li
cde638dcef [PM]: port IR based profUse pass to new pass manager 
llvm-svn: 269129
 2016-05-10 21:59:52 +00:00
Rong Xu
1cf66e30a9 [PGO] Use %t as the temporary profdata filename in the test cases. 
Using %t rather %T/<specific_name> as the temporary profdata filename.

llvm-svn: 255271
 2015-12-10 18:24:44 +00:00
Rong Xu
2f995f2098 [PGO] Resubmit "MST based PGO instrumentation infrastructure" (r254021) 
This new patch fixes a few bugs that exposed in last submit. It also improves
the test cases.
--Original Commit Message--
This patch implements a minimum spanning tree (MST) based instrumentation for
PGO. The use of MST guarantees minimum number of CFG edges getting
instrumented. An addition optimization is to instrument the less executed
edges to further reduce the instrumentation overhead. The patch contains both the
instrumentation and the use of the profile to set the branch weights.

Differential Revision: http://reviews.llvm.org/D12781

llvm-svn: 255132
 2015-12-09 18:08:16 +00:00