llvm-svn: 12682

long %test(long %X) {
        %Y = sub long 0, %X
        ret long %Y
}

We used to generate:

test:
        sub %ESP, 4
        mov DWORD PTR [%ESP], %ESI
        mov %ECX, DWORD PTR [%ESP + 8]
        mov %ESI, DWORD PTR [%ESP + 12]
        mov %EAX, 0
        mov %EDX, 0
        sub %EAX, %ECX
        sbb %EDX, %ESI
        mov %ESI, DWORD PTR [%ESP]
        add %ESP, 4
        ret

Now we generate:

test:
        mov %EAX, DWORD PTR [%ESP + 4]
        mov %EDX, DWORD PTR [%ESP + 8]
        neg %EAX
        adc %EDX, 0
        neg %EDX
        ret

llvm-svn: 12681

llvm-svn: 12680

  * In promote32, if we can just promote a constant value, do so instead of
    promoting a constant dynamically.
  * In visitReturn inst, actually USE the promote32 argument that takes a
    Value*

The end result of this is that we now generate this:

test:
        mov %EAX, 0
        ret

instead of...

test:
        mov %AX, 0
        movzx %EAX, %AX
        ret

for:

ushort %test() {
        ret ushort 0
}

llvm-svn: 12679

llvm-svn: 12674

llvm-svn: 12673

llvm-svn: 12670

llvm-svn: 12669

llvm-svn: 12668

llvm-svn: 12659

llvm-svn: 12658

types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.

llvm-svn: 12653

types and can have arbitrary 32- and 64-bit integer types indexing into
sequential types.

Auto-upgrade .ll files that use ubytes to index into structures to use uint's.

llvm-svn: 12652

to index into structure types and allows arbitrary 32- and 64-bit integer
types to index into sequential types.

llvm-svn: 12651

llvm-svn: 12648

have non-long indices for sequential types.  In order to avoid trying to figure
out how the v9 backend works, we'll just hack it in the preselection pass.

llvm-svn: 12647

llvm-svn: 12646

llvm-svn: 12644

prerelease format for LLVM bytecode files.  Now we only are compatible with
LLVM 1.0+.

llvm-svn: 12643

llvm-svn: 12641

llvm-svn: 12639

llvm-svn: 12638

llvm-svn: 12633

Eliminating call-frame pseudo instrs and frame indices are still stubs.
Flesh out the emitPrologue method based on better ABI knowledge.

llvm-svn: 12632

Fix up comments.

llvm-svn: 12631

the CALL instruction).

llvm-svn: 12630

llvm-svn: 12629

llvm-svn: 12623

This also implements some new features for the indvars pass, including
linear function test replacement, exit value substitution, and it works with
a much more general class of induction variables and loops.

llvm-svn: 12620

llvm-svn: 12619

llvm-svn: 12618

This actually causes us to turn code like:

  return C ? A : B;

into a select instruction.

llvm-svn: 12617

llvm-svn: 12615

Move lowerselect pass to come after preselection.  Move machine
code construction and stack slots pass to come right before instruction
selection. This is to help fix perlbmk.

Update comments.

Make the sequence of passes in addPassesToJITCompile look more like
the sequence of passes in addPassesToEmitAssembly, including support
for -print-machineinstrs.

llvm-svn: 12614

llvm-svn: 12613

llvm-svn: 12611

llvm-svn: 12610

Patch contributed by Reid Spencer

llvm-svn: 12609

llvm-svn: 12607

llvm-svn: 12600