night:  fastcc returns should only go in XMM0 if we have SSE2 or above.

llvm-svn: 34613

llvm-svn: 34610

exprs hanging off a global, even if the global is not otherwise dead.  This
requires some tricky iterator gymnastics.

This implements Transforms/GlobalOpt/constantexpr-dangle.ll by deleting a
constantexpr that made it appear that the address of the function was taken.

llvm-svn: 34608

llvm-svn: 34606

llvm-svn: 34605

llvm-svn: 34604

2. Move comments for methods to .h file, delete them in .cpp file.
3. All places that were doing manual clear of high order bits now call the
   clearUnusedBits() method in order to not depend on undefined behavior
   of the >> operator when the number of bits shifted equals the word size.
4. Reduced # of loc by using the new result of clearUnusedBits() method.
5. Simplified logic (decreased indentation) in a few places.
6. Added code comments to larger functions that needed them.
7. Added FIXME notes about weak implementations of things (e.g. bit-by-bit
   shift right is sub-optimal).

llvm-svn: 34603

external symbols and global addresses.  Add the missing ones.

one important workaround: PPCISD::CALL is matched by both PPCcall_ELF
and PPCcall_Macho, disable the _ELF patterns for now.

llvm-svn: 34601

llvm-svn: 34599

llvm-svn: 34598

A couple of more places where a register liveness has been extended and its last kill should be updated accordingly.

llvm-svn: 34597

llvm-svn: 34596

llvm-svn: 34595

llvm-svn: 34594

llvm-svn: 34593

This implements CodeGen/X86/fp-stack-ret.ll:test[23]

llvm-svn: 34592

llvm-svn: 34590

section of the file.

llvm-svn: 34589

result value stuff.  This eliminates a bunch of duplicated code and now
GetRetValueLocs is the sole place that decides where a value is returned.

llvm-svn: 34588

llvm-svn: 34587

function.  This function now uses GetRetValueLocs to determine *where*
the result values are located and concerns itself with *how* to pull the
values out.

llvm-svn: 34586

llvm-svn: 34585

test/CodeGen/X86/fp-stack-ret.ll into:

        movl 4(%esp), %eax
        fldl (%eax)
        ret

instead of:

        subl $12, %esp
        movl 16(%esp), %eax
        movsd (%eax), %xmm0
        movsd %xmm0, (%esp)
        fldl (%esp)
        addl $12, %esp
        ret

by eliminating a token factor that blocked a check.

llvm-svn: 34584

registers out from the logic of *how* to return them.

This changes X86-64 to mark EAX live out when returning a 32-bit value,
where before it marked RAX liveout.

llvm-svn: 34582

llvm-svn: 34581

llvm-svn: 34579

llvm-svn: 34578

llvm-svn: 34577

llvm-svn: 34576

Nicolas Geoffray!

llvm-svn: 34574

llvm-svn: 34573

llvm-svn: 34572

llvm-svn: 34571

Handle the single word cases for shiftAmt == BitWidth.

llvm-svn: 34569

llvm-svn: 34568

llvm-svn: 34567

llvm-svn: 34565

llvm-svn: 34564

from README.
When no water available, use end of block if in range.  (More to do here.)

llvm-svn: 34563

llvm-svn: 34562