Fix a bug that caused us to crash on povray.  We weren't emitting an FP_REG_KILL into a block that had a successor with a FP PHI node.

llvm-svn: 19502

        mov %AX, WORD PTR [0]

instead of like this:

        mov %AX, WORD PTR []

llvm-svn: 19501

        movw 0, %ax

instead of like this:

        movw , %ax

llvm-svn: 19500

llvm-svn: 19499

llvm-svn: 19498

llvm-svn: 19497

llvm-svn: 19496

contain FP PHI nodes but no other FP defining instructions.  This fixes
183.equake

llvm-svn: 19495

llvm-svn: 19494

256.bzip2 from 7142 to 7103 lines of .s file.

Second, add initial support for folding loads into compares, though this code
is dynamically dead for now. :(

llvm-svn: 19493

several times in 256.bzip2:

        mov %EAX, DWORD PTR [%ESP + 204]
-       mov %EAX, DWORD PTR [%EAX]
-       or %EAX, 2097152
-       mov %ECX, DWORD PTR [%ESP + 204]
-       mov DWORD PTR [%ECX], %EAX
+       or DWORD PTR [%EAX], 2097152

llvm-svn: 19492

  mov %AL, BYTE PTR [%EDX + l18_length_code]
  movzx %EAX, %AL

Emit:

  movzx %EAX, BYTE PTR [%EDX + l18_length_code]

llvm-svn: 19489

Select [mem] += Val operations.  For constants, we used to get:

  mov %ECX, -32768
  add %ECX, DWORD PTR [l4_match_start]
  mov DWORD PTR [l4_match_start], %ECX

Now we get:

  add DWORD PTR [l4_match_start], -32768

For other values we used to get:

  mov %EBP, %EDI   ;; because the add destroys the value
  add %EBP, DWORD PTR [l4_input_len]
  mov DWORD PTR [l4_input_len], %EBP

now we get:

  add DWORD PTR [l4_input_len], %EDI

Both of these use less registers than the alternative, are faster and smaller.

llvm-svn: 19488

llvm-svn: 19487

folded into an instruction.

llvm-svn: 19486

llvm-svn: 19485

same for PHI nodes.

llvm-svn: 19484

* Fold loads into Add, sub, and, or, xor and mul when possible.
* Codegen shl X, 1 as add X, X

llvm-svn: 19483

llvm-svn: 19482

llvm-svn: 19481

llvm-svn: 19480

llvm-svn: 19479

llvm-svn: 19475

actually attributed to the arguments by doxygen.

llvm-svn: 19473

        mov %ECX, %EAX
        add %ECX, 32768
        mov %SI, WORD PTR [2*%ECX + l13_prev]

Generate this:

        mov %SI, WORD PTR [2*%ECX + l13_prev + 65536]

This occurs when you have a GEP instruction where an index is
"something + imm".

llvm-svn: 19472

llvm-svn: 19469

llvm-svn: 19468

llvm-svn: 19467

llvm-svn: 19466

does not support them.

llvm-svn: 19465

llvm-svn: 19464

llvm-svn: 19463

SDNode ctor.

llvm-svn: 19462

* Change the names of the resulting module to Hello instead of libHello
* Change lib/Debug -> Debug/lib per new makefile implementation.

llvm-svn: 19459

* Get rid of non-compliant <font> elements (how did that get in there?)

llvm-svn: 19458

llvm-svn: 19457

intended to be a dlopenable module and not a "plain" shared library.

llvm-svn: 19456

llvm-svn: 19455

passes the -module option on the libtool command line to ensure that the
shared library being built can be dlopened and dlsym can work on that
module. LOADABLE_MODULE should be sent only in conjunction with the
SHARED_LIBRARY directive. It should generally be used for any module that
is intended to be the target of an LLVM -load option. Note that loadable
modules will not have the lib prefix but otherwise look like shared
libraries. This is per the libtool recommendations and prevents these
special shared libraries from being linked in via -l option to the linker.

llvm-svn: 19454

llvm-svn: 19453