the "physical" location of tokens, refer to the "spelling" location.
This is more concrete and useful, tokens aren't really physical objects!

llvm-svn: 62309

Fixed LiveVariables bug where we didn't consider block-level expressions that functioned as the size of a VLA to be live.

llvm-svn: 60730

- Block-expression for 'ObjCForCollectionStmt' is not alive before it occurs
- Recursively visit 'element' expression for ObjCForCollectionStmt to get liveness for referenced block-level expressions and variables.

llvm-svn: 59316

llvm-svn: 59290

Update include files.

llvm-svn: 59284

llvm-svn: 59222

Update CFGStmtVisitor to recognize that ObjCForCollectionStmts are special block-level "expressions".

llvm-svn: 59176

llvm-svn: 59161

llvm-svn: 59075

Introduce a single AST node SizeOfAlignOfExpr for all sizeof and alignof expressions, both of values and types.

llvm-svn: 59057

llvm-svn: 59053

llvm-svn: 57910

Move VLA processing logic from LiveVariables to CFG construction.  This way all dataflow analyses "see" the VLA size expressions.

llvm-svn: 56655

Fixes <rdar://problem/6248086>

llvm-svn: 56645

Added decl_iterator to DeclStmt to provide an abstract interface to iterate over the ScopedDecls of a DeclStmt.
Updated a few clients of DeclStmt::getNextDeclarator() to use decl_iterator instead.  Will update other clients after additional testing.

llvm-svn: 54368

  http://lists.cs.uiuc.edu/pipermail/cfe-dev/2008-July/002157.html

Essentially the observer mechanism in LiveVariables was observing block-level
expressions multiple times, leading to a case where the dead store checker could
see a value as dead when it was really live.

llvm-svn: 53115

Patch by David Chisnall!

llvm-svn: 52422

Refactored LiveVariables to use getTerminatorCondition() in VisitTerminator().

Bug fix: CFG now computes Block-level expression numbers using information
from block terminators.  This fixes <rdar://problem/5868189>.

llvm-svn: 49818

are referenced by CFGBlock terminators.

llvm-svn: 49798

Fix bug in terminator processing for uninitialized-values: simply ignore the terminator, don't reprocess it.

LiveVariables analysis now does a flow-insensitive analysis to determine what variables have their address taken; these variables are now always treated as being live.

The DataflowSolver now uses "SetTopValue()" when getting the initial value for the entry/exit block.

llvm-svn: 49734

in a block's terminator.  This expression is visited within a block, but it is accessed by the
terminator.  This is important to observe because for live-variables analysis the block-level
expression is live between the terminator and where the expression occurs in the block.  So far
this hasn't been an issue to not observe this because the block-level expression used in the
terminator is always the last one in the block, and we have never queried the liveness information
about this point (but before the terminator).

llvm-svn: 49709

"Alive" as opposed to staying the same.

llvm-svn: 49707

is still live.

llvm-svn: 49705

LiveVariables analysis now uses intersect for the merge of block-level expression liveness information.
The rationale is that a block-level expression cannot be live in a parent block unless it is live in all of the successor blocks.

llvm-svn: 48618

lib dir and move all the libraries into it.  This follows the main
llvm tree, and allows the libraries to be built in parallel.  The
top level now enforces that all the libs are built before Driver,
but we don't care what order the libs are built in.  This speeds
up parallel builds, particularly incremental ones.

llvm-svn: 48402

to be run on other declarations of blocks of code (e.g., Objective-C methods.)

llvm-svn: 48339

llvm-svn: 47958

llvm-svn: 47955

that aren't VarDecls.

llvm-svn: 47572

confluence points the liveness information for variables (Decls) and NOT
block-level expressions.

llvm-svn: 47506

llvm-svn: 47464

as the initializers for DeclStmts were not being registered as being
live at the start of the DeclStmt.

llvm-svn: 46837

and now we require a FunctionDecl* object so that we can also keep track of
all of the ParmDecls.

Modified clients of LiveVariables to conform to the new interface.

llvm-svn: 46490

dead at an assignment without taking into account if the variable was used in
the RHS of the assignment.

llvm-svn: 46153

is because GNU-style Statement-expressions cause the last statement in the
statement-expression to act like an expression.

We now have two notions: block-level statements and block-level expressions.

The former are all Stmt* that appear in the list of statements in CFGBlocks. The
latter is the subset of the former; these block-level statements are used as
subexpressions somewhere in the AST. CFG::isBlockExpr() returns true for the
latter, not the former (previously isBlockExpr() always returned true for
non-Expr Stmt*).

Modified the LiveVariables analysis to also track liveness state for block-level
expressions (using the updated definition of block-level expressions).

Modified the dataflow solver so that when it records values for block-level
statements, it records the dataflow value *before* the transfer function for a
Stmt* is evaluated (not after). This is more in sync in what clients will want.

Modified CFGStmtVisitor to record the current block-level statement.

llvm-svn: 46143

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

llvm-svn: 46133

to have a much simpler, cleaner interpretation of what is a "location"
in a function (as encoded by a CFG).

llvm-svn: 45846

llvm-svn: 45750

discussion of this change.

llvm-svn: 45410