llvm-svn: 25889

fixing a bunch of nasty hackery

llvm-svn: 23735

llvm-svn: 22451

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

* Convert tabs to spaces

llvm-svn: 21426

llvm-svn: 19694

llvm-svn: 19687

This allows us to generate this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        shld %EDX, %EDX, 2
        shl %EAX, 2
        ret

instead of this:

foo:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %EDX, %EAX
        shrd %EDX, %ECX, 30
        shl %EAX, 2
        ret

Note the magically transmogrifying immediate.

llvm-svn: 19686

addition to being three address, LEA's don't set the flags.

This fixes 186.crafty.

llvm-svn: 19251

branches.

llvm-svn: 19247

llvm-svn: 15409

llvm-svn: 15371

llvm-svn: 15365

llvm-svn: 15364

llvm-svn: 15363

llvm-svn: 15362

their names more decriptive. A name consists of the base name, a
default operand size followed by a character per operand with an
optional special size. For example:

ADD8rr -> add, 8-bit register, 8-bit register

IMUL16rmi -> imul, 16-bit register, 16-bit memory, 16-bit immediate

IMUL16rmi8 -> imul, 16-bit register, 16-bit memory, 8-bit immediate

MOVSX32rm16 -> movsx, 32-bit register, 16-bit memory

llvm-svn: 11995

llvm-svn: 11987

llvm-svn: 11984

switch statements in the constructors and simplifies the
implementation of the getUseType() member function. You will have to
specify defs using MachineOperand::Def instead of MOTy::Def though
(similarly for Use and UseAndDef).

llvm-svn: 11715

llvm-svn: 11393

llvm-svn: 11276

llvm-svn: 11274

llvm-svn: 11055

allocation.

llvm-svn: 10633

llvm-svn: 9903

Header files will be on the way.

llvm-svn: 9298

* Fix bug in the createNOP method, which was not marking the operands of the
  generated XCHG as useanddef.  I don't think this method is actually used,
  so it wasn't breaking anything, but it should be fixed anyway...

llvm-svn: 7539

llvm-svn: 6323

llvm-svn: 6320

llvm-svn: 5272

llvm-svn: 5102

* Expose information about implicit defs/uses of register through the
  MachineInstrInfo.h file.

llvm-svn: 4877

llvm-svn: 4826

llvm-svn: 4742

llvm-svn: 4741

llvm-svn: 4728

llvm-svn: 4442

llvm-svn: 4413

llvm-svn: 4410