module to the ELF file.  Test it by adding support for emitting common
symbols.  This allows us to compile this:

%X = weak global int 0
%Y = weak global int 0
%Z = weak global int 0

to an elf file that 'readelf's this:

Symbol table '.symtab' contains 4 entries:
   Num:    Value  Size Type    Bind   Vis      Ndx Name
     0: 00000000     0 NOTYPE  LOCAL  DEFAULT  UND
     1: 00000004     4 OBJECT  GLOBAL DEFAULT  COM X
     2: 00000004     4 OBJECT  GLOBAL DEFAULT  COM Y
     3: 00000004     4 OBJECT  GLOBAL DEFAULT  COM Z

llvm-svn: 22343

llvm-svn: 22342

llvm-svn: 22341

XMM registers.  There are many known deficiencies and fixmes, which will be
addressed ASAP.  The major benefit of this work is that it will allow the
LLVM register allocator to allocate FP registers across basic blocks.

The x86 backend will still default to x87 style FP.  To enable this work,
you must pass -enable-sse-scalar-fp and either -sse2 or -sse3 to llc.

An example before and after would be for:
double foo(double *P) { double Sum = 0; int i; for (i = 0; i < 1000; ++i)
                        Sum += P[i]; return Sum; }

The inner loop looks like the following:
x87:
.LBB_foo_1:     # no_exit
        fldl (%esp)
        faddl (%eax,%ecx,8)
        fstpl (%esp)
        incl %ecx
        cmpl $1000, %ecx
        #FP_REG_KILL
        jne .LBB_foo_1  # no_exit

SSE2:
        addsd (%eax,%ecx,8), %xmm0
        incl %ecx
        cmpl $1000, %ecx
        #FP_REG_KILL
        jne .LBB_foo_1  # no_exit

llvm-svn: 22340

1. Pass Value*'s into lowering methods so that the proper pointers can be
   added to load/stores from the valist
2. Intrinsics that return void should only return a token chain, not a token
   chain/retval pair.
3. Rename LowerVAArgNext -> LowerVAArg, because VANext is long gone.
4. Now that we have Value*'s available in the lowering methods, pass them
   into any load/stores from the valist that are emitted

llvm-svn: 22339

1. Pass Value*'s into lowering methods so that the proper pointers can be
   added to load/stores from the valist
2. Intrinsics that return void should only return a token chain, not a token
   chain/retval pair.
3. Rename LowerVAArgNext -> LowerVAArg, because VANext is long gone.

llvm-svn: 22338

1: Legalize operand in UINT_TO_FP expanision

2: SRA x, const i8 was not promoting the constant to shift amount type.
llvm-svn: 22337

llvm-svn: 22336

llvm-svn: 22335

llvm-svn: 22334

llvm-svn: 22333

llvm-svn: 22332

llvm-svn: 22331

llvm-svn: 22330

and legalizing the extload.  Strange.  Should fix most alpha regressions.

llvm-svn: 22329

llvm-svn: 22328

llvm-svn: 22327

is at least overloading the right virtual methods.  The implementations
are currently wrong though.  This fixes Ptrdist/bc, but not other programs
(e.g. siod).

llvm-svn: 22326

by Aaron Gray, cleaned up by me.

llvm-svn: 22324

llvm-svn: 22323

llvm-svn: 22322

llvm-svn: 22321

llvm-svn: 22320

llvm-svn: 22319

The optimization for locally used allocas was not safe for allocas that
were read before they were written.  This change disables that optimization
in that case.

llvm-svn: 22318

llvm-svn: 22317

thing as cygwin most of the time, and printing our alignments in log2
rather than number of bytes.

llvm-svn: 22316

llvm-svn: 22315

Sameer D. Sahasrabuddhe for pointing this out!

llvm-svn: 22314

llvm-svn: 22313

llvm-svn: 22312

tracking the instructions causing loads and stores provides more information than just the pointer being loaded or stored

llvm-svn: 22311

is a mismatch in their character type pointers (i.e. fprintf() prints an
array of ubytes while fwrite() takes an array of sbytes).
We can probably do better than this (such as casting the ubyte to an
sbyte).

llvm-svn: 22310

llvm-svn: 22309

llvm-svn: 22308

llvm-svn: 22307

llvm-svn: 22306

rather than relying on the assembler.  Only a few more pseudo instructions
left.  Also merge load code paths.

llvm-svn: 22305

llvm-svn: 22304

llvm-svn: 22303