Add the function ExpressionGraph::Erase and a test-case for it.
Erase removes the given expression from the graph by shifting
all later expressions to the front. Indices and references
are updated accordingly.
Change-Id: Ic0449ccf28b369600fd2959a7e2a919d47f4cbe3
ExpressionId FindMatchingEndif(ExpressionId id)
- Finds the closing ENDIF expression for a given IF expression.
ExpressionId FindMatchingElse(ExpressionId id)
- Finds the ELSE expression for a given IF expression.
- Returns -1, if this IF doesn't have an else
This patch is a preparation to the code analyzing required
for various optimization passes.
Change-Id: I893102a757c6a0bcacbcc1190c2b8ef08314eb97
- Move codegen tests to a sub directory
- Add tests for all functions of Expression, ExpressionRef, and ExpressionGraph
- Respect dependencies during tests: The ExpressionGraph test doesn't
use ExpressionRef anymore.
The new tests revealed a few bugs so the following changes were made:
- Expression::MakeNop now resets the current expression with the default
constructed NOP expression
- ExpressionGraph::Insert now updates the lhs_id the same way as
InsertBack()
Change-Id: I6a18925c1e4d972c29ec1219f2073b4eaf2df737
Objects of 'Expression' can now be freely created and copied around.
This creation does NOT add them to the active ExpressionGraph any
more. The insertion into the graph is now done by ExpressionRef,
which explicitly call graph.add(...) in each operation.
This change brings the following advantages:
1. 'Expression' is now stand-alone and side-effect free
- Remove the dependency Expression->ExpressionGraph
- Expressions can be created by the optimizer
2. Explicit graph insertion
- Previously CreateCompileTimeConstant not only created an
expression, but also inserted it into the active graph. Now
this insertion is done explicitly by ExpressionRef
3. It is now easier to insert new types and members
- Should be straight forward now, because we got rid of the
3-way dependency
- This is a preparation patch for the new return-type member in
https://ceres-solver-review.googlesource.com/c/ceres-solver/+/16224
Change-Id: Icef2fe529a4db001a10d1fb6816c9dc681b14ff2
User defined cost functors have to include this new header
instead of internal/expression_ref.h. This hides some
complexity of ExpressionRef and reduces compile time outside
of code generation mode.
This patch also removes the dependency ExpressionRef->Jet.
Change-Id: Ie3f93648775e14881dc5cfab213bbc983c6cfeee
Darius Rueckert