is not defined in the current translation unit. Doing so lead to compile errors
such as PR9114.

Instead, when CodeGen is building the vtable, don't try to emit a definition
for functions that aren't marked used in the current translation unit.
Fixes PR9114.

llvm-svn: 124768

llvm-svn: 124767

redundant searches in the string. No functionality change.

llvm-svn: 124760

Based on user feedback, swap -Wuninitialized diagnostics to have the warning refer to the bad use, and the note to the variable declaration.

llvm-svn: 124758

llvm-svn: 124757

llvm-svn: 124756

on that name. Canonicalization eliminates silliness such as "." and
"foo/.." that breaks the uniquing of files in the presence of virtual
files or files whose inode numbers have changed during
parsing/re-parsing. c-index-test isn't able to create this crazy
situation, so I've resorted to testing outside of the Clang
tree. Fixes <rdar://problem/8928220>.

Note that this hackery will go away once we have a real virtual file
system on which we can layer FileManager; the virtual-files hack is
showing cracks.

llvm-svn: 124754

llvm-svn: 124753

CC_PRINT_OPTIONS and can be used to get some out-of-band information on header
usage from a build.

llvm-svn: 124751

information to a file.

llvm-svn: 124750

ones outside the predefines buffer (which is what -H does).

llvm-svn: 124749

llvm-svn: 124748

but has non-empty data fields, such as array of zero length,
remains zero.
// rdar://8945175

llvm-svn: 124741

savings of 25% sounds impressive, except that this amounted to only
about 360k in our standard "large" completion result set (40,000
results). Since code completion is performance-sensitive, the 4%
slowdown due to uniquing outweighs the 360k benefit. 

llvm-svn: 124737

llvm-svn: 124736

llvm-svn: 124735

callbacks class.
 - Aside from being generally cleaner, this also allows -H to work correctly in
   modes other than standard preprocessing (e.g., -c, -MM, etc.)

llvm-svn: 124723

on, as well as more reliably limiting invalid references to locals from
nested scopes.

llvm-svn: 124721

llvm-svn: 124719

Fixes PR9121!

llvm-svn: 124718

llvm-svn: 124715

Remove redundant check to not warn for warn_equality_with_extra_parens if we are in a macro.  This is checked twice.

llvm-svn: 124714

speed but saves us about 25% of the memory usage for strings.

llvm-svn: 124704

llvm-svn: 124702

llvm-svn: 124701

llvm-svn: 124700

llvm-svn: 124699

the string copying goes through a single place that can have
associated state.

llvm-svn: 124698

llvm-svn: 124697

llvm-svn: 124696

Macros frequently contain extra '()' to make instantiation less error prone.
This warning was flagging a ton of times on postgresql because of its use of macros.

llvm-svn: 124695

llvm-svn: 124689

bit-pattern.  It's not clear that this is actually useful given current
language restrictions.

llvm-svn: 124685

llvm-svn: 124684

eliminating the need to copy those strings.

llvm-svn: 124683

Add test case for dead stores checker to not flag dead assignments to 'self' within a nested assignment.

llvm-svn: 124681

llvm-svn: 124680

llvm-svn: 124675

llvm-svn: 124674

BumpPtrAllocator, rather than manually new/delete'ing them. This
optimization also allows us to avoid allocating memory for and copying
constant strings (e.g., "return", "class").

This also required embedding the priority and availability of results
within the code completion string, to avoid extra memory allocation
within libclang.

llvm-svn: 124673