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

code.  This "instantly" gives us loop-extractor power to assist with the
debugment of our nasty codegen issues.  :)

llvm-svn: 12678

llvm-svn: 12677

llvm-svn: 12676

llvm-svn: 12675

llvm-svn: 12674

llvm-svn: 12673

llvm-svn: 12671

llvm-svn: 12670

llvm-svn: 12669

llvm-svn: 12668

llvm-svn: 12667

llvm-svn: 12659

llvm-svn: 12658

no meaning if the code is not reachable.

llvm-svn: 12657

llvm-svn: 12656

llvm-svn: 12655

llvm-svn: 12654

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: 12650

llvm-svn: 12649

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: 12645

llvm-svn: 12644

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

llvm-svn: 12643

llvm-svn: 12642

llvm-svn: 12641

llvm-svn: 12640

llvm-svn: 12639

llvm-svn: 12638

llvm-svn: 12637

llvm-svn: 12636

llvm-svn: 12635