For long names this is easier to read and in most cases the omitted information can be seen in the actual SIL code.
With the option -Xllvm -sil-full-demangle the old behavior can be restored.
When visited by an ASTWalker, an if_expr nested within a
patter_binding_decl has no Parent. This leads to a crash while assigning
counters for the if_expr's "else" branch: there is no enclosing region,
so grabbing the current region is impossible.
We can handle this case safely by using a new leaf counter for the
"else" branch.
Swift PR-1116, rdar://problem/23256795
We were creating counters for IfExpr coverage, but weren't actually
mapping these when emitting coverage. Handle this.
rdar://problem/21720161
Swift SVN r29971
