David Majnemer 46e1183e69 [SimplifyCFG] Stop inserting calls to llvm.trap for UB ...

SimplifyCFG had logic to insert calls to llvm.trap for two very
particular IR patterns: stores and invokes of undef/null.

While InstCombine canonicalizes certain undefined behavior IR patterns
to stores of undef, phase ordering means that this cannot be relied upon
in general.

There are much better tools than llvm.trap: UBSan and ASan.

N.B. I could be argued into reverting this change if a clear argument as
to why it is important that we synthesize llvm.trap for stores, I'd be
hard pressed to see why it'd be useful for invokes...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@273778 91177308-0d34-0410-b5e6-96231b3b80d8

2016-06-25 08:04:19 +00:00

..

llvm

[SimplifyCFG] Stop inserting calls to llvm.trap for UB

2016-06-25 08:04:19 +00:00

llvm-c

Add support for string attributes in the C API.

2016-06-15 17:50:39 +00:00