at more than those which define CPSR. You can have this situation:

(1)  subs  ...
(2)  sub   r6, r5, r4
(3)  movge ...
(4)  cmp   r6, 0
(5)  movge ...

We cannot convert (2) to "subs" because (3) is using the CPSR set by
(1). There's an analogous situation here:

(1)  sub   r1, r2, r3
(2)  sub   r4, r5, r6
(3)  cmp   r4, ...
(5)  movge ...
(6)  cmp   r1, ...
(7)  movge ...

We cannot convert (1) to "subs" because of the intervening use of CPSR.

llvm-svn: 117950

llvm-svn: 117940

llvm-svn: 117936

codegen using the patterns; the latter gates the assembler recognizing the
instruction.

llvm-svn: 117931

llvm-svn: 117929

llvm-svn: 117927

patterns as such

llvm-svn: 117923

*_Encode classes. These instructions are the only ones which use those classes,
so a subclass isn't necessary.

llvm-svn: 117906

must be 8 bits.  Support this memory form.

llvm-svn: 117902

aliases installed and working.  They now work when the
matched pattern and the result instruction have exactly
the same operand list.

This is now enough for us to define proper aliases for
movzx and movsx, implementing rdar://8017633 and PR7459.

Note that we do not accept instructions like:
  movzx 0(%rsp), %rsi

GAS accepts this instruction, but it doesn't make any
sense because we don't know the size of the memory
operand.  It could be 8/16/32 bits.

llvm-svn: 117901

in their asmstring.  Fix the two x86 "NOREX" instructions that have them.
If these comments are important, the instlowering stuff can print them.

llvm-svn: 117897

various X86 and ARM instructions that are bitten by this as isCodeGenOnly,
as they are.

llvm-svn: 117884

Use this to make the X86 and ARM targets set isCodeGenOnly=1 
automatically for their instructions that have Format=Pseudo,
resolving a hack in tblgen.

llvm-svn: 117862

and make it a hard error for instructions to not have an asm string.
These instructions should be marked isCodeGenOnly.

llvm-svn: 117861

got a dulicated line).

llvm-svn: 117860

llvm-svn: 117859

Instead of silently ignoring these instructions, emit a hard error and
force the target author to either refactor the target or mark the 
instruction 'isCodeGenOnly'.

Mark a few instructions in ARM and MBlaze as isCodeGenOnly the are 
doing this.

llvm-svn: 117858

how the push/pop mnemonic aliases are wrong.

llvm-svn: 117857

calling convention out of the fast and normal ISel files, and
into the calling convention TD file.

llvm-svn: 117856

which has the same logic specified in the CallingConv TD file.
This brings FastISel in line with the standard X86 ISel.

llvm-svn: 117855

llvm-svn: 117848

"In32BitMode" and "In64BitMode" into tblgen, allow any
predicate that inherits from AssemblerPredicate.

llvm-svn: 117831

directives, allowing things like this:

def : MnemonicAlias<"pop", "popl">, Requires<[In32BitMode]>;
def : MnemonicAlias<"pop", "popq">, Requires<[In64BitMode]>;

Move the rest of the X86 MnemonicAliases over to the .td file.

llvm-svn: 117830

llvm-svn: 117824

llvm-svn: 117823

llvm-svn: 117822

llvm-svn: 117821

for shl.  Caught by inspection.

llvm-svn: 117820

llvm-svn: 117819

llvm-svn: 117818

llvm-svn: 117817

llvm-svn: 117816

just remaps one mnemonic to another.  Convert a few of the X86 aliases
from .cpp to .td code.

llvm-svn: 117815

llvm-svn: 117787

llvm-svn: 117785

llvm-svn: 117782

llvm-svn: 117773

llvm-svn: 117771

llvm-svn: 117769

llvm-svn: 117766