[PATCH] D20143: New pass: guard widening

[Sanjoy Das via llvm-commits]

sanjoy added a comment.

Just to make the picture I have in my head explicit, ideally, the path forward will be:

1. Figure out what cases actually matter in practice
2. Write test cases for those, and add logic as needed

Repeat (1) and (2) till we think we have adequate coverage.

3. Trim down the brute-force O(N^2) algorithm to something nicer while still making sure we get the important cases


http://reviews.llvm.org/D20143