by Mark Cianciosa on cfe-dev.

llvm-svn: 73672

It is possible that main input file does not have any symbol with debug info. To  handle this edge case, always create main compile unit first.
This fixes PR 4228.

llvm-svn: 73520

llvm-svn: 73514

static intializers for structs.

llvm-svn: 73349

x86-32.  This is slightly messy, but I think it's consistent with gcc.

llvm-svn: 73306

always_inline from working.

llvm-svn: 73273

source directory.

llvm-svn: 73094

 - <rdar://problem/6948443> WARNING: Linking two modules of different data
   layouts!

llvm-svn: 73093

llvm-svn: 73022

get rid of a few more clang vector builtins.

llvm-svn: 73015

insert/extract; the relevant instructions are defined to take only an 
i32.

llvm-svn: 73005

llvm-svn: 73004

 - <rdar://problem/6948703> clang treats weak_import like weak

llvm-svn: 72967

when generating a coercion for ABI handling purposes.
 - This may only manifest itself when building at -O0, but the practical effect
   is that other arguments may get clobbered.

 - <rdar://problem/6930451> [irgen] ABI coercion clobbers other arguments

llvm-svn: 72932

llvm-svn: 72803

llvm-svn: 72780

 - Avoids running any LLVM optimizations, even at -O2, etc., while still keeping
   any language changes these optimizations imply.

llvm-svn: 72742

Also, committing an #if 0'ed __builtin_setjmp and __builtin_longjmp 
implementation I've had sitting in my tree for a while.  I haven't 
enabled it because the LLVM backend support isn't complete yet.

llvm-svn: 72727

K&R-style definition.

llvm-svn: 72690

llvm-svn: 72687

llvm-svn: 72607

actually necessary in some obscure cases.

llvm-svn: 72585

llvm-svn: 72574

llvm-svn: 72573

any body can spot codegen bugs with volatile, or knows of any in the
bug database, let me know.

llvm-svn: 72572

getUnqualifiedType() doesn't strip off all qualifiers for non-canonical 
types.

llvm-svn: 72552

llvm-svn: 72504

llvm-svn: 72444

llvm-svn: 72441

llvm-svn: 72439

thing for non-aggregate types.
 - Otherwise we unnecessarily pin values to the stack and currently end up
   triggering a backend bug in one case.

 - This loose cooperation with LLVM to implement the ABI is pretty ugly.

 - <rdar://problem/6918722> [irgen] clang miscompile of many pointer varargs on
   x86-64

llvm-svn: 72419

Found by code inspection; I haven't seen this in real-world code.

llvm-svn: 72408

improve codegen in some cases.

llvm-svn: 72273

 - PR4242.

llvm-svn: 72268

This attempts to fix PR4239.

llvm-svn: 72251

evaluated first.  This can also improve codegen just a bit as we might
have another register to play with for the evaluation of the rhs.

llvm-svn: 72226

llvm-svn: 72110

redundant with -triple.

llvm-svn: 72108

llvm-svn: 72033

llvm-svn: 72032