llvm-svn: 47799

llvm-svn: 47798

Add lock prefix support to x86.  Also add the instructions necessary for the atomic ops.  They are still marked pseudo, since I cannot figure out what format to use, but they are the correct opcode.

llvm-svn: 47795

llvm-svn: 47770

llvm-svn: 47740

llvm-svn: 47736

generic & x86 versions; change generic to follow x86
and improve comments.  Add PPC version (not right
for non-Darwin.)

llvm-svn: 47734

llvm-svn: 47732

llvm-svn: 47725

llvm-svn: 47720

llvm-svn: 47711

test/DebugInfo/funccall.ll

llvm-svn: 47709

llvm-svn: 47707

llvm-svn: 47706

llvm-svn: 47705

llvm-svn: 47704

llvm-svn: 47703

llvm-svn: 47702

uses the same encoding everywhere. Linux FIXME'ed.

llvm-svn: 47701

provide TAI hook for selection of EH data emission format. Currently unused.

llvm-svn: 47699

and was causing aborts with the new APInt changes. This may also be
fixing an obscure ppc64 bug.

llvm-svn: 47692

llvm-svn: 47688

llvm-svn: 47663

stack slot and store if the  SINT_TO_FP is actually legal.  This allows
us to compile:

double a(double b) {return (unsigned)b;}

to:

_a:
	cvttsd2siq	%xmm0, %rax
	movl	%eax, %eax
	cvtsi2sdq	%rax, %xmm0
	ret

instead of:

_a:
	subq	$8, %rsp
	cvttsd2siq	%xmm0, %rax
	movl	%eax, %eax
	cvtsi2sdq	%rax, %xmm0
	addq	$8, %rsp
	ret

crazy.

llvm-svn: 47660

llvm-svn: 47659

_test:
	movl	%edi, %eax
	ret

instead of:

_test:
        movl    $4294967295, %ecx
        movq    %rdi, %rax
        andq    %rcx, %rax
        ret

It would be great to write this as a Pat pattern that used subregs 
instead of a 'pseudo' instruction, but I don't know how to do that
in td files.

llvm-svn: 47658

llvm-svn: 47657

ComputeMaskedBits to use the APInt form, and remove the
non-APInt form.

llvm-svn: 47654

llvm-svn: 47652

llvm-svn: 47635

llvm-svn: 47629

would have been a Godsend here!

llvm-svn: 47625

llvm-svn: 47606

llvm-svn: 47600

GOT-style position independent code. Before only tail calls to
protected/hidden functions within the same module were optimized.
Now all function calls are tail call optimized.

llvm-svn: 47594

calls. Before arguments that could overwrite each other were
explicitly lowered to a stack slot, not giving the register allocator
a chance to optimize. Now a sequence of copyto/copyfrom virtual
registers ensures that arguments are loaded in (virtual) registers
before they are lowered to the stack slot (and might overwrite each
other). Also parameter stack slots are marked mutable for
(potentially) tail calling functions.

llvm-svn: 47593

pointed out that this isn't correct at -O0.

llvm-svn: 47575

llvm-svn: 47573

{S,U}MUL_LOHI with an unused high value.

llvm-svn: 47569

result into a MUL late in the X86 codegen process. ISD::MUL is
once again Legal on X86, so this is no longer needed. And, the
hack was suboptimal; see PR1874 for details.

llvm-svn: 47567