llvm-project.git/llvm/test/CodeGen/ARM/debuginfo-split-carryexpr.ll, branch users/nico/python-2 Unnamed repository; edit this file 'description' to name the repository. [DebugInfo] Prevent invalid fragments at ISel from dropping debug info 2019-12-12T12:28:39+00:00 stozer stephen.tozer@sony.com 2019-12-10T14:33:17+00:00 e39e2b4a79c6645a85f0aee5b1e9e6d5d917033a During SelectionDAG, if a value which is associated with a DBG_VALUE needs to be split across multiple registers, the DBG_VALUE will be split into a set of fragment expressions to recreate the original value. If one or more of these fragments cannot be created, they would previously be silently dropped, causing the old debug value to live past its expiry date. This patch fixes this issue by keeping invalid fragments while setting their value as Undef. Differential revision: https://reviews.llvm.org/D70248 
During SelectionDAG, if a value which is associated with a DBG_VALUE
needs to be split across multiple registers, the DBG_VALUE will be split
into a set of fragment expressions to recreate the original value.

If one or more of these fragments cannot be created, they would
previously be silently dropped, causing the old debug value to live past
its expiry date. This patch fixes this issue by keeping invalid
fragments while setting their value as Undef.

Differential revision: https://reviews.llvm.org/D70248