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Author SHA1 Message Date
Arthur Eubanks baffd052b0 [StructurizeCFG][NewPM] Port -structurizecfg to NPM 
This doesn't support -structurizecfg-skip-uniform-regions since that
would require porting LegacyDivergenceAnalysis.

The NPM doesn't support adding a non-analysis pass as a dependency of
another, so I had to add -lowerswitch to some tests or pin them to the
legacy PM.

This is the only RegionPass in tree, so I simply copied the logic for
finding all Regions from the legacy PM's RGManager into
StructurizeCFG::run().

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D89026
 2020-10-23 15:54:03 -07:00
Ehud Katz 85c3088049 [StructurizeCFG] Fix region nodes ordering 
This is a reimplementation of the `orderNodes` function, as the old
implementation didn't take into account all cases.
The new implementation uses SCCs instead of Loops to take account of
irreducible loops.

Fix PR41509

Differential Revision: https://reviews.llvm.org/D79037
 2020-06-01 12:50:35 +03:00
Ehud Katz c6c265527d Revert "[StructurizeCFG] Fix region nodes ordering" 
This reverts commit 897d8ee5cd,
due to causing an infinite loop when encountering a loop with
a sub-region with an inner loop.
 2020-05-14 17:56:39 +03:00
Ehud Katz 897d8ee5cd [StructurizeCFG] Fix region nodes ordering 
This is a reimplementation of the `orderNodes` function, as the old
implementation didn't take into account all cases.

Fix PR41509

Differential Revision: https://reviews.llvm.org/D79037
 2020-05-13 15:33:36 +03:00