ISD::VECTOR_SHUFFLE now stores an array of integers representing the shuffle
mask internal to the node, rather than taking a BUILD_VECTOR of ConstantSDNodes
as the shuffle mask.  A value of -1 represents UNDEF.

In addition to eliminating the creation of illegal BUILD_VECTORS just to 
represent shuffle masks, we are better about canonicalizing the shuffle mask,
resulting in substantially better code for some classes of shuffles.

A clean up of x86 shuffle code, and some canonicalizing in DAGCombiner is next.

llvm-svn: 69952

memory operand tuples. This doesn't ever come up in normal
code however.

llvm-svn: 69848

Spotted by gcc-4.5.

llvm-svn: 69673

This fixes PR4002.

llvm-svn: 69672

This makes the extra copyRegToReg calls in ScheduleDAGSDNodesEmit.cpp
unnecessary. Derived from a patch by Jakob Stoklund Olesen.

llvm-svn: 69635

in the MachineFunction class, renaming it to addLiveIn for consistency with
the same method in MachineBasicBlock.  Thanks for Anton for suggesting this.

llvm-svn: 69615

llvm-svn: 69417

llvm-svn: 69394

leaq	foo@TLSGD(%rip), %rdi

as part of the instruction sequence. Using a register other than %rdi and then
copying it to %rdi is not valid.

llvm-svn: 69350

llvm-svn: 69347

matter, because this instruction isn't generated until after
things that care.

llvm-svn: 69336

present, but it's inconsistent.

llvm-svn: 69335

llvm-svn: 69284

llvm-svn: 69204

llvm-svn: 69203

llvm-svn: 69127

the local register allocator.

llvm-svn: 69115

either the source or destination is a physical h register.

This fixes sqlite3 with the post-RA scheduler enabled.

llvm-svn: 69111

REX prefixes.

llvm-svn: 69108

any non-address uses of the address value. This fixes 186.crafty.

llvm-svn: 69094

llvm-svn: 69049

it accordingly. Thanks to Jakob Stoklund Olesen for pointing
out how this might be useful.

llvm-svn: 68986

Reapply 68847.
Now debug_inlined section is covered by TAI->doesDwarfUsesInlineInfoSection(), which is false by default.

llvm-svn: 68964

 - Add patterns for h-register extract, which avoids a shift and mask,
   and in some cases a temporary register.
 - Add address-mode matching for turning (X>>(8-n))&(255<<n), where
   n is a valid address-mode scale value, into an h-register extract
   and a scaled-offset address.
 - Replace X86's MOV32to32_ and related instructions with the new
   target-independent COPY_TO_SUBREG instruction.

On x86-64 there are complicated constraints on h registers, and
CodeGen doesn't currently provide a high-level way to express all of them,
so they are handled with a bunch of special code. This code currently only
supports extracts where the result is used by a zero-extend or a store,
though these are fairly common.

These transformations are not always beneficial; since there are only
4 h registers, they sometimes require extra move instructions, and
this sometimes increases register pressure because it can force out
values that would otherwise be in one of those registers. However,
this appears to be relatively uncommon.

llvm-svn: 68962

ISD::SIGN_EXTEND_INREG. Tablegen-generated code can handle
these cases, and the scheduling issues observed earlier
appear to be resolved now.

llvm-svn: 68959

llvm-svn: 68958

llvm-svn: 68954

llvm-svn: 68951

llvm-svn: 68950

This unbreaks the JIT on x86-64.

llvm-svn: 68948

llvm-svn: 68947

only if symbolic addresses are RIP relatives.

llvm-svn: 68924

llvm-svn: 68915

See comment for details.  This fixes rdar://6772169

llvm-svn: 68890

llvm-svn: 68887

hasImplicitDefOfPhysReg methods.  Use them to remove a 
look in X86 fast isel.

llvm-svn: 68886

from the assembler:

Error: unknown pseudo-op: `.debug_inlined'
llvm-svn: 68863

Keep track of inlined functions and their locations. This information is collected when nested llvm.dbg.func.start intrinsics are seen. (Right now, inliner removes nested llvm.dbg.func.start intrinisics during inlining.) 

Create debug_inlined dwarf section using these information. This info is used by gdb, at least on Darwin, to enable better experience debugging inlined functions. See DwarfWriter.cpp for more information on structure of debug_inlined section.

llvm-svn: 68847

With this we generate

movl    %gs:0, %eax
leal    i@NTPOFF(%eax), %eax

instead of

movl    $i@NTPOFF, %eax
addl    %gs:0, %eax

llvm-svn: 68778

It turns out that there are still several problems with this, will file a bugzilla.

llvm-svn: 68749