by Anton Korobeynikov!  This is a step towards closing PR786.

llvm-svn: 28447

llvm-svn: 28445

change.  This fixes PowerPC/fnegsel.ll.

llvm-svn: 28443

argument struct pointer, enabling ABI compatibility for the CBE with
platforms with strange struct-return ABIs.  This fixes 252.eon and
CoyoteBench/fftbench on Darwin/X86 among other things.

llvm-svn: 28442

llvm-svn: 28441

llvm-svn: 28440

FORMAL_ARGUMENTS nodes include a token operand.

llvm-svn: 28439

return argument pops the hidden struct pointer if present, not the caller.

For example, in this testcase:

struct X { int D, E, F, G; };
struct X bar() {
  struct X a;
  a.D = 0;
  a.E = 1;
  a.F = 2;
  a.G = 3;
  return a;
}
void foo(struct X *P) {
  *P = bar();
}

We used to emit:

_foo:
        subl $28, %esp
        movl 32(%esp), %eax
        movl %eax, (%esp)
        call _bar
        addl $28, %esp
        ret
_bar:
        movl 4(%esp), %eax
        movl $0, (%eax)
        movl $1, 4(%eax)
        movl $2, 8(%eax)
        movl $3, 12(%eax)
        ret

This is correct on Linux/X86 but not Darwin/X86.  With this patch, we now
emit:

_foo:
        subl $28, %esp
        movl 32(%esp), %eax
        movl %eax, (%esp)
        call _bar
***     addl $24, %esp
        ret
_bar:
        movl 4(%esp), %eax
        movl $0, (%eax)
        movl $1, 4(%eax)
        movl $2, 8(%eax)
        movl $3, 12(%eax)
***     ret $4

For the record, GCC emits (which is functionally equivalent to our new code):

_bar:
        movl    4(%esp), %eax
        movl    $3, 12(%eax)
        movl    $2, 8(%eax)
        movl    $1, 4(%eax)
        movl    $0, (%eax)
        ret     $4
_foo:
        pushl   %esi
        subl    $40, %esp
        movl    48(%esp), %esi
        leal    16(%esp), %eax
        movl    %eax, (%esp)
        call    _bar
        subl    $4, %esp
        movl    16(%esp), %eax
        movl    %eax, (%esi)
        movl    20(%esp), %eax
        movl    %eax, 4(%esi)
        movl    24(%esp), %eax
        movl    %eax, 8(%esi)
        movl    28(%esp), %eax
        movl    %eax, 12(%esi)
        addl    $40, %esp
        popl    %esi
        ret

This fixes SingleSource/Benchmarks/CoyoteBench/fftbench with LLC and the
JIT, and fixes the X86-backend portion of PR729.  The CBE still needs to
be updated.

llvm-svn: 28438

llvm-svn: 28437

FP arithmetic arguments and results are never NaNs or +=Infs. This includes
ignoring parity flag (PF) when checking for FP equality.

llvm-svn: 28432

ARMAsmPrinter::runOnMachineFunction
LowerFORMAL_ARGUMENTS
ARMInstrInfo::isMoveInstr

llvm-svn: 28431

llvm-svn: 28427

llvm-svn: 28425

llvm-svn: 28424

llvm-svn: 28423

I'm suprised it didn't cause more!

llvm-svn: 28421

  If it reads the chain result of the call, then the use, callseq_start,
  and call would form a cycle!
- Don't forget handle node replacement!
- There could also be a TokenFactor between the load and the callseq_start.

llvm-svn: 28420

llvm-svn: 28419

llvm-svn: 28418

llvm-svn: 28417

the TableGen generated code since the load's chain result is read by
the callseq_start node.

llvm-svn: 28416

llvm-svn: 28415

This is part of the on-going work on PR 761.

llvm-svn: 28414

llvm-svn: 28409

llvm-svn: 28402

llvm-svn: 28401

llvm-svn: 28400

llvm-svn: 28399

llvm-svn: 28398

llvm-svn: 28397

currently...

llvm-svn: 28393

- Fix a couple of minor bugs in i16immSExt8 and i16immZExt8.
- Added loadiPTR fragment used for indirect jumps and calls.

llvm-svn: 28392

llvm-svn: 28390

add a stub LowerFORMAL_ARGUMENTS

llvm-svn: 28388

M_LOOK_UP_PTR_REG_CLASS which allows the register class of the operand to be
resolved via a callback at runtime.

llvm-svn: 28387

llvm-svn: 28384

llvm-svn: 28383

llvm-svn: 28382

llvm-svn: 28381

llvm-svn: 28378