AST file more lazy, so that we don't eagerly load that information for
all known identifiers each time a new AST file is loaded. The eager
reloading made some sense in the context of precompiled headers, since
very few identifiers were defined before PCH load time. With modules,
however, a huge amount of code can get parsed before we see an
@import, so laziness becomes important here.
The approach taken to make this information lazy is fairly simple:
when we load a new AST file, we mark all of the existing identifiers
as being out-of-date. Whenever we want to access information that may
come from an AST (e.g., whether the identifier has a macro definition,
or what top-level declarations have that name), we check the
out-of-date bit and, if it's set, ask the AST reader to update the
IdentifierInfo from the AST files. The update is a merge, and we now
take care to merge declarations before/after imports with declarations
from multiple imports.
The results of this optimization are fairly dramatic. On a small
application that brings in 14 non-trivial modules, this takes modules
from being > 3x slower than a "perfect" PCH file down to 30% slower
for a full rebuild. A partial rebuild (where the PCH file or modules
can be re-used) is down to 7% slower. Making the PCH file just a
little imperfect (e.g., adding two smallish modules used by a bunch of
.m files that aren't in the PCH file) tips the scales in favor of the
modules approach, with 24% faster partial rebuilds.
This is just a first step; the lazy scheme could possibly be improved
by adding versioning, so we don't search into modules we already
searched. Moreover, we'll need similar lazy schemes for all of the
other lookup data structures, such as DeclContexts.
llvm-svn: 143100
The code had it backwards, thinking size_t was signed, and using that for "%zd".
Also let the analysis get the types for (u)intmax_t while we are at it.
llvm-svn: 143099
Enqueue the nodes generated as the result of processing a statement
inside the Core Engine. This makes sure ExpEngine does not access
CoreEngine's private members and is more concise.
llvm-svn: 143089
up. Thus, improving the support for compares is goodness because it increases
the number of terminator instructions we can handle. This creates many more
opportunities for target specific fast-isel.
llvm-svn: 143079
inferior program for the lldb debugger to operate on. The fixed lldb executable
corresponds to r142902.
Plus some minor modifications to the test benchmark to conform to way bench.py
is meant to be invoked.
llvm-svn: 143075
We were parsing label references to the i12 encoding, which isn't right.
They need to go to the pci variant instead.
More of rdar://10348687
llvm-svn: 143068
"_cmd", "this", and "self". These variables are handled
differently from all other external variables used by
the expression. Other variables are used indirectly
through the $__lldb_arg operand; only _cmd, this, and
self are passed directly through the ABI.
There are two modifications:
- I added a function to ClangExpressionDeclMap that
retrives the value of one of these variables by name;
and
- I made IRInterpreter fetch these values when needed,
and ensured that the proper level of indirection is
used.
llvm-svn: 143065
MORESTACK_RET_RESTORE_R10; which are lowered to a RET and a RET
followed by a MOV respectively. Having a fake instruction prevents
the verifier from seeing a MachineBasicBlock end with a
non-terminator (MOV). It also prevents the rather eccentric case of a
MachineBasicBlock ending with RET but having successors nevertheless.
Patch by Sanjoy Das.
llvm-svn: 143062
Owen Anderson