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3 Commits

Author SHA1 Message Date
Mikael Holmen 0a3e98062f Bail out of a SimplifyCFG switch table opt at undef values. 
Summary:
A true or false result is expected from a comparison, but it seems the possibility of undef was overlooked, which could lead to a failed assert. This is fixed by this patch by bailing out if we encounter undef.

The bug is old and the assert has been there since the end of 2014, so it seems this is unusual enough to forego optimization.

Patch by JesperAntonsson.

Reviewers: spatel, eeckstein, hans

Reviewed By: hans

Subscribers: uabelho, llvm-commits

Differential Revision: https://reviews.llvm.org/D40639

llvm-svn: 319768
 2017-12-05 14:14:00 +00:00
Mikael Holmen 9c13c8b6ec Revert r319537: Bail out of a SimplifyCFG switch table opt at undef values. 
Broke build bots so reverting.

llvm-svn: 319539
 2017-12-01 13:11:39 +00:00
Mikael Holmen 9f047795fb Bail out of a SimplifyCFG switch table opt at undef values. 
Summary:
A true or false result is expected from a comparison, but it seems the possibility of undef was overlooked, which could lead to a failed assert. This is fixed by this patch by bailing out if we encounter undef.

The bug is old and the assert has been there since the end of 2014, so it seems this is unusual enough to forego optimization.

Patch by: JesperAntonsson

Reviewers: spatel, eeckstein, hans

Reviewed By: hans

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D40639

llvm-svn: 319537
 2017-12-01 12:30:49 +00:00