Add a bone-simple utility to load a MachO object into memory, look for
a function (main) in it, and run that function directly. This will be used
as a test and development platform for MC-JIT work regarding symbol resolution,
dynamic lookup, etc..

Code by Daniel Dunbar.

llvm-svn: 127885

For example, on 32-bit architecture, don't promote all uses of the IV
to 64-bits just because one use is a 64-bit cast.
Alternate implementation of the patch by Arnaud de Grandmaison.

llvm-svn: 127884

llvm-svn: 127883

Carefully written implementations of the 32-bit integer divide and modulus functions for ARM.  These are still using a naive digit-by-digit algorithm, but the core loop has been carefully written.

llvm-svn: 127882

global using directives in C++ headers, from Elliot Glaysher!

llvm-svn: 127881

llvm-svn: 127879

llvm-svn: 127877

llvm-svn: 127876

For now, only the default segments are supported.

llvm-svn: 127875

llvm-svn: 127874

llvm-svn: 127873

On MSVCRT and compatible, output of %e is incompatible to Posix by default. Number of exponent digits should be at least 2. "%+03d"

FIXME: Implement our formatter in future!
llvm-svn: 127872

makes valgrind stop complaining about uninitialized variables being read when it
accesses a bitfield (category) that shares its bits with these variables.

llvm-svn: 127871

functions and initializers, just report the declarations present in
the module.

The motivation is to open the way for using the lazy module parsing,
which should speed up clients that just want a symbol list (nm, ar).

This is slightly less precise, but since both -strip-dead-prototypes
and -globaldce are part of the standard pipeline, this shouldn't
change the result for clang/dragonegg produced binaries.

Any decl in an IL file was also put there because a FE expected it
to be necessary, so this should not be a problem for "-O0 -emit-llvm".

As a sanity check, I have bootstrapped clang on linux and built
firefox on both linux and darwin. A clang bootstrap on darwin
with LTO fails with or without this patch because, ironically,
the linker doesn't like the combination of dead_strip and LTO
when building libLTO.so :-)

llvm-svn: 127870

llvm-svn: 127869

Stack slot real estate is virtually free compared to registers, so it is
advantageous to spill earlier even though the same value is now kept in both a
register and a stack slot.

Also eliminate redundant spills by extending the stack slot live range
underneath reloaded registers.

This can trigger a dead code elimination, removing copies and even reloads that
were only feeding spills.

llvm-svn: 127868

llvm-svn: 127867

a while back.

llvm-svn: 127866

Tweak CrashRecoveryContextCleanup::createCleanup() to use the 'delete' cleanup as opposed to the 'destructor' cleanup (reclaims more memory).

llvm-svn: 127865

Construct 'Sema' object on the stack, so that crash recovery can recovery it's associated resources without walking over dead stack space.

llvm-svn: 127864

llvm-svn: 127863

www/hacking.html: Cosmetic change, to detabify, eliminate whitespace, and add proper slashes to URL.

llvm-svn: 127862

MSYS substitutes path (that begins with "/") to de-mounted Windows path, even if it were nonexistent.
"/foo/bar" might be substituted to "C:/msysgit/foo/bar".

llvm-svn: 127861

MSYS substitutes path (that begins with "/") to de-mounted Windows path.
"/tmp" might be substituted as "C:/DOCUME~1/chapuni/LOCALS~1/Temp".

llvm-svn: 127860

llvm-svn: 127859

llvm-svn: 127858

This is not supposed to happen, but I have seen the x86 rematter getting
confused when rematerializing partial redefs.

llvm-svn: 127857

and early clobbers.

Assert when trying to find an undefined value.

llvm-svn: 127856

Add new CrashRecoveryContextCleanup subclass: CrashRecoveryContextDeleteCleanup.  This deletes the object, not just calls its destructor.

llvm-svn: 127855

Issue this as an IR-gen error;  it's not really worthwhile doing this
"right", i.e. in Sema, because IR gen knows a lot of tricks beyond
what the constant evaluator knows.

llvm-svn: 127854

llvm-svn: 127853

comparisons on x86.  Essentially, the way this works is that SUB+SBB sets
the relevant flags the same way a double-width CMP would.

This is a substantial improvement over the generic lowering in LLVM. The output
is also shorter than the gcc-generated output; I haven't done any detailed
benchmarking, though.

llvm-svn: 127852

Use CrashRecoveryContextCleanup objects to recover an ASTUnit if we crash in ASTUnit::LoadFromCommandLine() and ASTUnit::LoadFromCompilerInvocation().

llvm-svn: 127851

Use CrashRecoveryContextCleanup objects to release resources associated with Sema during a crash while parsing.

llvm-svn: 127850

Augment CrashRecoveryContext to have registered "cleanup" objects that can be used to release resources during a crash.

llvm-svn: 127849

llvm-svn: 127848

llvm-svn: 127847

CharUnits. No change in functionality intended.

llvm-svn: 127846

llvm-svn: 127845

functionality intended.

llvm-svn: 127844