use ImmutableMap::SlimFind(), which returns the correct value.

Added pruning of dead block-level expressions and Decls from our value map
using liveness information.

llvm-svn: 46154

values for the block-level expressions.

Modified 'LiveVariables' to provide the option to clients to record
liveness information for block-level expressions (using the above feature).

Modified 'DeadStores' to conform to the new interface of 'LiveVariables'.

Modified 'GRConstants' to compute liveness information for block-level
expressions.

llvm-svn: 46137

Refactored the use of this method into both the Sema module and Analysis module,
which were using their own static functions that did the same thing.

llvm-svn: 46129

state.

llvm-svn: 46106

map. This will allow us to quickly prune them from maps without searching the
entire map.

llvm-svn: 46101

to sort sub-expressions before Block-level expressions.

llvm-svn: 46100

values are determined when evaluating the parent expression.

llvm-svn: 46096

constant propagation.

llvm-svn: 46095

llvm-svn: 46092

llvm-svn: 46087

llvm-svn: 46086

that were "not a constant."

llvm-svn: 46085

Fixed some compilation errors with GREngine that showed up during
template instantiation.

llvm-svn: 46074

node caching in GREngine will guarantee that we do not insert a node twice into
a nodeset.

llvm-svn: 46071

llvm-svn: 46051

variant type, and not just the pointer value.

llvm-svn: 46049

Cleaned up GRConstants::AddBinding to not directly reference the
predecessor node.  Now we just manipulate the current state, and a driver
function creates nodes as needed.

llvm-svn: 46040

the graph reachability engine.

llvm-svn: 46036