Merge branch 'fork-opt' of https://gitlab.engr.illinois.edu/llvm/hercules into fork-opt

hercules_ir/src/dot.rs

hercules_ir/src/ir.rs

hercules_opt/src/device_placement.rs

hercules_opt/src/editor.rs

hercules_opt/src/fork_concat_split.rs

hercules_opt/src/fork_guard_elim.rs

hercules_opt/src/fork_transforms.rs

hercules_opt/src/forkify.rs

hercules_opt/src/gcm.rs

hercules_opt/src/inline.rs

hercules_opt/src/interprocedural_sroa.rs

hercules_opt/src/ivar.rs

hercules_opt/src/lib.rs

hercules_opt/src/outline.rs

hercules_opt/src/unforkify.rs

hercules_opt/src/utils.rs

hercules_test/hercules_interpreter/src/interpreter.rs

hercules_test/hercules_interpreter/src/lib.rs

hercules_test/hercules_interpreter/src/value.rs

hercules_test/hercules_tests/tests/fork_transform_tests.rs