tree a889906b5dc0676dbbd9674d3d8218d6f40e9d91
parent 45c235d41f12ba8734c63b3da435f5ee44d3b86a
author Steven Perron <31666470+s-perron@users.noreply.github.com> 1534866884 -0400
committer GitHub <noreply@github.com> 1534866884 -0400
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Handle breaks from structured-ifs in DCE. (#1848)

* Handle breaks from structured-ifs in DCE.

dead code elimination assumes that are conditional branches except for
breaks and continues in loops will have an OpSelectionMerge before them.
That is not true when breaking out of a selection construct.

The fix is to look for breaks in selection constructs in the same place
we look for breaks and continues for loops.