Simplifier does not preserve dependency ordering of the program
I noticed this some time ago, but I thought this is expected, because there's a comment in CoreLint that mentions this:
lintCoreBindings dflags pass local_in_scope binds
= initL dflags flags in_scope_set $
addLoc TopLevelBindings $
lintLetBndrs TopLevel binders $
-- Put all the top-level binders in scope at the start
-- This is because transformation rules can bring something
-- into use 'unexpectedly'
...
However talking to SPJ today he mentioned that in Core we should actually preserve dependency ordering, hence this ticket.
I'll update with a reproducer.
Trac metadata
Trac field | Value |
---|---|
Version | 8.6.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |