Merge branch 'bjorn/compiler/ssa'

* bjorn/compiler/ssa:
  Travis CI: Run the SSA linter in the Linux64SmokeTest build
  Remove retired compiler passes
  Introduce a new SSA-based intermediate format
  hipe_beam_to_icode: Correct translation of get_map_elements
  beam_dead: Remove shortcut of binary matching instruction
  beam_bs: Remove optimizations that are easier done on SSA format
  Don't run unsafe compiler passes
  Simplify optimizations by introducing is_nil late
  beam_utils: Make is_tagged_tuple a pure test
  beam_except: Enhance recognition of function_clause exceptions
  beam_validator: Infer the types of copies in a smarter way
  beam_validator: Improve merge of cons and literal list
  beam_validator: Strengthen validation of func_info
  beam_validator: Allow get_tuple_element before dsetelement
  beam_validator: Don't transfer state to labels that can't be reached
  beam_validator: Improve type analysis for tuples
  beam_validator: Be more careful when updating try/catch state
  beam_trim: Handle an empty list of instructions
  v3_core: Number argument variables in ascending order
  Teach binary instructions to use Y registers as destination

OTP-14894

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/compiler/src/beam_z.erl b/lib/compiler/src/beam_z.erl
index 1c9d762eb1..677094b3cd 100644
--- a/lib/compiler/src/beam_z.erl
+++ b/lib/compiler/src/beam_z.erl
@@ -110,6 +110,8 @@ undo_rename({test,has_map_fields,Fail,[Src|List]}) ->
     {test,has_map_fields,Fail,Src,{list,List}};
 undo_rename({get_map_elements,Fail,Src,{list,List}}) ->
     {get_map_elements,Fail,Src,{list,List}};
+undo_rename({test,is_eq_exact,Fail,[Src,nil]}) ->
+    {test,is_nil,Fail,[Src]};
 undo_rename({select,I,Reg,Fail,List}) ->
     {I,Reg,Fail,{list,List}};
 undo_rename(I) -> I.