Change Details

This patch is a work in progress to try and incorporate dwarf fragments to preserve DI intrinsics when EvaluateInDifferentType in zext instructions. Atm the focus is on the scalar case with integer type but it should be generalized.

When zext is EvaluatedInDifferentType, InstCombine drops the dbg.value intrinsic. This patch tries to preserve said DI, by inserting the zext's old DI in the resulting instruction. The current implementation works only for integer non-vector variables, but this should get extendet to work for every case. This patch is a work in progress to try and incorporate dwarf fragments to preserve DI intrinsics when EvaluateInDifferentType in zext instructions. Atm the focus is on the scalar case with integer type but it should be generalized.

When zext is EvaluatedInDifferentType, InstCombine drops the dbg.value intrinsic. This patch tries to preserve said DI, by inserting the zext's old DI in the resulting instruction. The current implementation works only for integer non-vector variables, but this should get extendet to work for every case. This patch is a work in progress to try and incorporate dwarf fragments to preserve DI intrinsics when EvaluateInDifferentType in zext instructions. Atm the focus is on the scalar case with integer type but it should be generalized.