In 64-bit mode, sub_8bit_hi sub-registers can only be used by NOREX
instructions. The COPY created from the EXTRACT_SUBREG DAG node cannot
target all GR8 registers, only those in GR8_NOREX.

TO enforce this, we ensure that all instructions using the
EXTRACT_SUBREG are GR8_NOREX constrained.

This fixes PR11088.

llvm-svn: 141499

Fix some Intel syntax disassembly issues with instructions that implicitly use AL/AX/EAX/RAX such as ADD/SUB/ADC/SUBB/XOR/OR/AND/CMP/MOV/TEST.

llvm-svn: 140974

llvm-svn: 139485

Luis Felipe Strano Moraes!

llvm-svn: 129558

their carry depenedencies with MVT::Flag operands) and use clean and beautiful
EFLAGS dependences instead.

We do this by changing the modelling of SBB/ADC to have EFLAGS input and outputs
(which is what requires the previous scheduler change) and change X86 ISelLowering
to custom lower ADDC and friends down to X86ISD::ADD/ADC/SUB/SBB nodes.

With the previous series of changes, this causes no changes in the testsuite, woo.

llvm-svn: 122213

backend that they were all implemented except umul.  This one fell back
to the default implementation that did a hi/lo multiply and compared the
top.  Fix this to check the overflow flag that the 'mul' instruction
sets, so we can avoid an explicit test.  Now we compile:

void *func(long count) {
      return new int[count];
}

into:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	seto	%cl                     ## encoding: [0x0f,0x90,0xc1]
	testb	%cl, %cl                ## encoding: [0x84,0xc9]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL

instead of:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	testq	%rdx, %rdx              ## encoding: [0x48,0x85,0xd2]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL

Other than the silly seto+test, this is using the o bit directly, so it's going in the right
direction.

llvm-svn: 120935

the i8 versions of instructions in some cases.  In test6, we started 
generating:

	cmpq	$0, -8(%rsp)            ## encoding: [0x48,0x81,0x7c,0x24,0xf8,0x00,0x00,0x00,0x00]
                                        ## <MCInst #478 CMP64mi32
                                        ##  <MCOperand Reg:114>
                                        ##  <MCOperand Imm:1>
                                        ##  <MCOperand Reg:0>
                                        ##  <MCOperand Imm:-8>
                                        ##  <MCOperand Reg:0>
                                        ##  <MCOperand Imm:0>>

instead of:

	cmpq	$0, -8(%rsp)            ## encoding: [0x48,0x83,0x7c,0x24,0xf8,0x00]
                                        ## <MCInst #479 CMP64mi8
                                        ##  <MCOperand Reg:114>
                                        ##  <MCOperand Imm:1>
                                        ##  <MCOperand Reg:0>
                                        ##  <MCOperand Imm:-8>
                                        ##  <MCOperand Reg:0>
                                        ##  <MCOperand Imm:0>>

Fix this and add some comments.

llvm-svn: 116053

use.  Since TEST is completely different than all other binops,
don't define a multipattern for it.

This completes factorization of binops.

llvm-svn: 115982

llvm-svn: 115978

llvm-svn: 115968

llvm-svn: 115967

are not defined as returning EFLAGS (like add_flag and friends),
the entire multipattern and several of the subclasses need to be
cloned.

This could be handled through better instantiation support in tblgen,
but it isn't meta enough.

llvm-svn: 115964

allowing us to convert ADD over.  deletes 160 lines of .td file.

llvm-svn: 115897

Start using ArithBinOpEFLAGS for OR, XOR, and SUB.

This removes 500 lines from the .td file.  Now AND/OR/XOR/SUB are all
defined exactly the same way instead of being close relatives.

llvm-svn: 115896

which instantiates the 34 versions of and all in one
swoop.  The BaseOpc/BaseOpc2/BaseOpc4 stuff should not
be required, but tblgen's feeble brain explodes when I
use Or4<BaseOpc>.V in the multipattern.

No change in the generated .inc files.

llvm-svn: 115893

This does change the generated .inc files to include the implicit use/def of eax.
Since these instructions are only generated by the assembler and disassembler it
doesn't actually matter though.

llvm-svn: 115885

As usual, no change in generated .inc files.

llvm-svn: 115882

llvm-svn: 115880

convert AND64ri32 to use BinOpRI.

llvm-svn: 115878

operand kind for immediates.  Use these to define a new BinOpRI
class and switch AND8/16/32ri over to it.  AND64ri32 needs some
more refactoring before it can make the switcheroo.

llvm-svn: 115752

llvm-svn: 115748

that i8 operations are even and i16,i32,i64 operations have a
low opcode bit set (they are odd).

llvm-svn: 115747

llvm-svn: 115745

llvm-svn: 115744

gunk that goes along with an MVT (e.g. reg class, preferred load operation,
memory operand)

llvm-svn: 115727

that I need a heavier handed approach to get ultimate factorization.

llvm-svn: 115726

!strconcat(!strconcat(!strconcat(!strconcat

Simplify some x86 td files to use it.

llvm-svn: 115719

register class, and use this to simplify use of BinOpRR.

llvm-svn: 115716

llvm-svn: 115715

gross hack (having the asmmatcher handle the alias).

llvm-svn: 115685

the right places.  X86Instr64bit.td now dies, long live x86-64!

llvm-svn: 115669

llvm-svn: 115663

llvm-svn: 115660

llvm-svn: 115632

llvm-svn: 115631

llvm-svn: 115627

llvm-svn: 115607

llvm-svn: 115605

bswap32 doesn't read eflags.

llvm-svn: 115604

pseudo instructions.

Move POPCNT to InstrSSE since they are SSE4 instructions.

llvm-svn: 115603