tree 1e6681400f5fead23cfc4270bc2b994a055a889d
parent cda1bd50488d0f0ded3e708c6c669cb259050fb3
author Bryan Chan <bryan.chan@ca.ibm.com> 1463665880 +0000
committer Bryan Chan <bryan.chan@ca.ibm.com> 1463665880 +0000

Avoid an assertion failure when a bit field is extracted from a value of the same size.

Summary: One of the cases handled by ValueObjectChild::UpdateValue() uses the entire width of the parent's scalar value as the size of the child, and extracts the child by calling Scalar::ExtractBitfield(). This seems valid but APInt::trunc(), APInt::sext() and APInt::zext() assert that the bit field must not have the same size as the parent scalar. Replacing those calls with sextOrTrunc(), zextOrTrunc(), sextOrSelf() and zextOrSelf() fixes the assertion failures.

Reviewers: uweigand, labath

Subscribers: labath, lldb-commits

Differential Revision: http://reviews.llvm.org/D20355

llvm-svn: 270062