Dan Gohman 3280793234 [WebAssembly] Use dominator information to improve BLOCK placement ...

Always starting blocks at the top of their containing loops works, but creates
unnecessarily deep nesting because it makes all blocks in a loop overlap.
Refine the BLOCK placement algorithm to start blocks at nearest common
dominating points instead, which significantly shrinks them and reduces
overlapping.

llvm-svn: 253876

2015-11-23 16:19:56 +00:00

13 KiB

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