Implement error handling for bytecode parsing.

Patch by Scott Michel.

llvm-svn: 35364

llvm-svn: 35363

hopefully forestall similar errors.

llvm-svn: 35362

llvm-svn: 35361

llvm-svn: 35360

llvm-svn: 35359

original and new instruction. A slight performance hit with ostringstream
but it is only for debug.
Also, clean up an uninitialized variable warning noticed in a release build.

llvm-svn: 35358

llvm-svn: 35357

llvm-svn: 35355

Initial skeleton for pass documentation.

llvm-svn: 35354

llvm-svn: 35353

llvm-svn: 35352

#include <mmintrin.h>

extern __m64 C;

void baz(__v2si *A, __v2si *B)
{
  *A = C;
  _mm_empty();
}

We get this:

_baz:
        call "L1$pb"
"L1$pb":
        popl %eax
        movl L_C$non_lazy_ptr-"L1$pb"(%eax), %eax
        movq (%eax), %mm0
        movl 4(%esp), %eax
        movq %mm0, (%eax)
        emms
        ret

GCC gives us this:

_baz:
        pushl   %ebx
        call    L3
"L00000000001$pb":
L3:
        popl    %ebx
        subl    $8, %esp
        movl    L_C$non_lazy_ptr-"L00000000001$pb"(%ebx), %eax
        movl    (%eax), %edx
        movl    4(%eax), %ecx
        movl    16(%esp), %eax
        movl    %edx, (%eax)
        movl    %ecx, 4(%eax)
        emms
        addl    $8, %esp
        popl    %ebx
        ret

llvm-svn: 35351

llvm-svn: 35350

shift instruction.

llvm-svn: 35349

Fix SingleSource/Regression/C/2003-05-21-UnionBitFields.c by changing a
getHighBitsSet call to getLowBitsSet call that was incorrectly converted
from the original lshr constant expression.

llvm-svn: 35348

llvm-svn: 35347

This is particularly useful for the JIT, which lazily deserializes functions.

llvm-svn: 35346

llvm-svn: 35345

and shifting down without regard for the bitwidth of the APInt can lead
to incorrect initialization values. Instead, check for the word size case
(to avoid undef results from shift) and then do (1 << loBitsSet) - 1

llvm-svn: 35344

llvm-svn: 35343

Remove a use of getLowBitsSet that caused the mask used for replacement of
shl/lshr pairs with an AND instruction to be computed incorrectly. Its not
clear exactly why this is the case. This solves the disappearing shifts
problem, but it doesn't fix Regression/C/2003-05-21-UnionBitFields. It
seems there is more going on.

llvm-svn: 35342

llvm-svn: 35341

llvm-svn: 35340

* Don't assume shift amounts are <= 64 bits
* Avoid creating an extra APInt in SubOne and AddOne by using -- and ++
* Add another use of getLowBitsSet
* Convert a series of if statements to a switch

llvm-svn: 35339

strategy, emit JT's where possible.

llvm-svn: 35338

llvm-svn: 35337

llvm-svn: 35336

using the facilities of APInt. While this duplicates a tiny fraction of
the constant folding code, it also makes the code easier to read and
avoids large ConstantExpr overhead for simple, known computations.

llvm-svn: 35335

llvm-svn: 35334

2. Use isStrictlyPositive() instead of isPositive() in two places where
   they need APInt value > 0 not only >=0.

llvm-svn: 35333

CodeGen/X86/2007-03-24-InlineAsmVectorOp.ll

llvm-svn: 35332

llvm-svn: 35331

llvm-svn: 35330

llvm-svn: 35329

llvm-svn: 35328

implement initial support for the silly X constraint.  Testcase here: CodeGen/X86/2007-03-24-InlineAsmXConstraint.ll

llvm-svn: 35327

llvm-svn: 35326

APInt with its type mask.

llvm-svn: 35325

llvm-svn: 35324