2 Commits

Author	SHA1	Message	Date
Alastair Donaldson	7ee8f443ea	Fix add-dead-break and add-dead-continue passes to respect dominance (#2838) ... The implementation of these passes had overlooked the fact that adding a new edge to a control flow graph can change dominance information. Adding a dead break/continue risks causing uses to no longer be dominated by their definitions. This change introduces various tests to expose such scenarios, and augments the preconditions for these transformations with checks to guard against the situation.	2019-09-10 14:48:27 +01:00
Alastair Donaldson	1a89ac8b28	Transformation and fuzzer pass to add dead continues (#2758) ... Similar to the existing 'add dead breaks' pass, this adds a pass to add dead continues to blocks in loops where such a transformation is viable. Various functionality common to this new pass and 'add dead breaks' has been factored into 'fuzzer_util', and some small improvements to 'add dead breaks' that were identified while reviewing that code again have been applied. Fixes #2719.	2019-07-25 13:50:33 +01:00