them as machine instructions. Directives ".set noat" and ".set at" are now
emitted only at the beginning and end of a function except in the case where
they are emitted to enclose .cpload with an immediate operand that doesn't fit
in 16-bit field or unaligned load/stores.

Also, make the following changes:
- Remove function isUnalignedLoadStore and use a switch-case statement to
  determine whether an instruction is an unaligned load or store.

- Define helper function CreateMCInst which generates an instance of an MCInst
  from an opcode and a list of operands.

llvm-svn: 153552

any side effects.

llvm-svn: 153551

llvm-svn: 153536

If EmitNOAT is true, directives ".set noat" and ".set at" are emitted at the
beginning and end of a function. 

llvm-svn: 153528

llvm-svn: 153502

MachinePointerInfo when getStore is called to create a node that stores an
argument passed in register to the stack. Without this change, the post RA 
scheduler will fail to discover the dependencies between the stores
instructions and the instructions that load from a structure passed by value. 

The link to the related discussion is here:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-March/048055.html

llvm-svn: 153499

llvm-svn: 153498

llvm-svn: 153497

set it in MipsMCCodeEmitter::getMachineOpValue. Assert in getMachineOpValue if
MachineOperand MO is of an unexpected type. 

llvm-svn: 153494

offset applied to it.

llvm-svn: 153493

cleared. No functionality change.

llvm-svn: 153491

llvm-svn: 153486

llvm-svn: 153429

llvm-svn: 153155

These changes allow us to compile big endian from the command line for 32 bit
Mips targets. This patch will result in code and data actually being produced
in the correct endianess.

llvm-svn: 153153

Reorder includes in Target backends to following coding standards. Remove some superfluous forward declarations.

llvm-svn: 152997

llvm-svn: 152538

llvm-svn: 152537

operation action of nodes.

llvm-svn: 152452

llvm-svn: 152450

llvm-svn: 152447

llvm-svn: 152390

llvm-svn: 152290

For example, this pattern 
(select (setcc lhs, rhs, cc), true, 0)
is transformed to this one:
(select (setcc lhs, rhs, inverse(cc)), 0, true)

This enables MipsDAGToDAGISel::ReplaceUsesWithZeroReg (added in r152280) to
replace 0 with $zero.

llvm-svn: 152285

llvm-svn: 152282

For example, the first instruction in the code below can be eliminated if the
use of $vr0 is replaced with $zero: 

addiu $vr0, $zero, 0
add $vr2, $vr1, $vr0

add $vr2, $vr1, $zero

llvm-svn: 152280

Used to allow context sensitive printing of super-register or sub-register
references.

llvm-svn: 152043

llvm-svn: 152016

llvm-svn: 152001

llvm-svn: 151996

llvm-svn: 151847

and stores was added.

- SelectAddr should return false if Parent is an unaligned f32 load or store.
- Only aligned load and store nodes should be matched to select reg+imm
  floating point instructions.
- MIPS does not have support for f64 unaligned load or store instructions.

llvm-svn: 151843

objects for big endian and little endian targets.

Patch by Jack Carter.

llvm-svn: 151788

llvm-svn: 151645

Revert r151623 "Some ARM implementaions, e.g. A-series, does return stack prediction. ...", it is breaking the Clang build during the Compiler-RT part.

llvm-svn: 151630

llvm-svn: 151625

the processor keeps a return addresses stack (RAS) which stores the address
and the instruction execution state of the instruction after a function-call
type branch instruction.

Calling a "noreturn" function with normal call instructions (e.g. bl) can
corrupt RAS and causes 100% return misprediction so LLVM should use a
unconditional branch instead. i.e.
mov lr, pc
b _foo
The "mov lr, pc" is issued in order to get proper backtrace.

rdar://8979299

llvm-svn: 151623

llvm-svn: 151615

llvm-svn: 151614

load and store instructions.

llvm-svn: 151611