FWIW, X86 has 254 ambiguous instructions.

llvm-svn: 117979

for handling the fixup necessary.

llvm-svn: 117978

llvm-svn: 117977

This is another part of the fix for Radar 8599955.

llvm-svn: 117976

llvm-svn: 117975

llvm-svn: 117971

llvm-svn: 117969

llvm-svn: 117968

llvm-svn: 117967

llvm-svn: 117964

At least X86FloatingPoint requires correct kill flags after register allocation,
and targets using register scavenging benefit. Conservative kill flags are not
enough.

llvm-svn: 117960

llvm-svn: 117959

llvm-svn: 117956

llvm-svn: 117955

bits are zero, not that the current low bits are zero.  Fixes <rdar://problem/8606771>.

llvm-svn: 117953

from X86AsmParser.cpp

llvm-svn: 117952

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

give them individual stack slots once the are actually spilled.

llvm-svn: 117945

When an instruction refers to a spill slot with a LiveStacks entry, check that
the spill slot is live at the instruction.

llvm-svn: 117944

llvm-svn: 117941

llvm-svn: 117940

llvm-svn: 117939

llvm-svn: 117938

llvm-svn: 117937

llvm-svn: 117936

llvm-svn: 117935

llvm-svn: 117932

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

llvm-svn: 117931

llvm-svn: 117930

llvm-svn: 117929

llvm-svn: 117927

llvm-svn: 117925

patterns as such

llvm-svn: 117923

llvm-svn: 117922

llvm-svn: 117911

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

llvm-svn: 117906

peephole optimizer is disabled. That's not good at all.

llvm-svn: 117905

llvm-svn: 117904

llvm-svn: 117903

must be 8 bits.  Support this memory form.

llvm-svn: 117902