maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
306,060 Commits 23 Branches 0 Tags 2.2 GiB
Commit Graph

4 Commits

Author SHA1 Message Date
Davide Italiano c421dc00a9 [GlobalOpt] Autogenerate checks for the test in PR33686. 
Also fix a typo while here.

llvm-svn: 307921
 2017-07-13 15:55:34 +00:00
Davide Italiano c3dc055780 Reapply [GlobalOpt] Remove unreachable blocks before optimizing a function. 
This commit reapplies r307215 now that we found out and fixed
the cause of the cfi test failure (in r307871).

llvm-svn: 307920
 2017-07-13 15:40:59 +00:00
Davide Italiano b8ad3eebca [IPO] Temporarily rollback r307215. 
[GlobalOpt] Remove unreachable blocks before optimizing a function.
While the change is presumably correct, it exposes a latent bug
in DI which breaks on of the CFI checks. I'll analyze it further
and try to understand what's going on.

llvm-svn: 307729
 2017-07-11 23:10:17 +00:00
Davide Italiano 7dd0694f96 [GlobalOpt] Remove unreachable blocks before optimizing a function. 
LLVM's definition of dominance allows instructions that are cyclic
in unreachable blocks, e.g.:

  %pat = select i1 %condition, @global, i16* %pat

because any instruction dominates an instruction in a block that's
not reachable from entry.
So, remove unreachable blocks from the function, because a) there's
no point in analyzing them and b) GlobalOpt should otherwise grow
some more complicated logic to break these cycles.

Differential Revision:  https://reviews.llvm.org/D35028

llvm-svn: 307215
 2017-07-05 22:28:28 +00:00