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

llvm-svn: 151540

llvm-svn: 151538

llvm-svn: 151512

add/sub instructions.

llvm-svn: 151415

reserving a physical register ($gp or $28) for that purpose.

This will completely eliminate loads that restore the value of $gp after every
function call, if the register allocator assigns a callee-saved register, or
eliminate unnecessary loads if it assigns a temporary register. 

example:

.cpload $25       // set $gp.
...
.cprestore 16     // store $gp to stack slot 16($sp).
...
jalr $25          // function call. clobbers $gp.
lw $gp, 16($sp)   // not emitted if callee-saved reg is chosen.
...
lw $2, 4($gp)
...
jalr $25          // function call.
lw $gp, 16($sp)   // not emitted if $gp is not live after this instruction.
...

llvm-svn: 151402

llvm-svn: 151341

llvm-svn: 151340

llvm-svn: 151337

llvm-svn: 151332

Make all pointers to TargetRegisterClass const since they are all pointers to static data that should not be modified.

llvm-svn: 151134

llvm-svn: 151107

llvm-svn: 150918

llvm-svn: 150805

instructions to be emitted.

llvm-svn: 150782

llvm-svn: 150775

llvm-svn: 150739

llvm-svn: 150706

llvm-svn: 149961

llvm-svn: 149814

Passes prior to instructon selection are now split into separate configurable stages.
Header dependencies are simplified.
The bulk of this diff is simply removal of the silly DisableVerify flags.

Sorry for the target header churn. Attempting to stabilize them.

llvm-svn: 149754

Allows command line overrides to be centralized in LLVMTargetMachine.cpp.
LLVMTargetMachine can intercept common passes and give precedence to command line overrides.
Allows adding "internal" target configuration options without touching TargetOptions.
Encapsulates the PassManager.
Provides a good point to initialize all CodeGen passes so that Pass ID's can be used in APIs.
Allows modifying the target configuration hooks without rebuilding the world.

llvm-svn: 149672

needed to emit a 64-bit gp-relative relocation entry. Make changes necessary
for emitting jump tables which have entries with directive .gpdword. This patch
does not implement the parts needed for direct object emission or JIT.

llvm-svn: 149668

 

llvm-svn: 149585

selector registers.
 

llvm-svn: 149584

 

llvm-svn: 149583

Fixes PR11877

llvm-svn: 149180

 

llvm-svn: 148918

- Use MipsAnalyzeImmediate to expand immediates that do not fit in 16-bit.
- Change the types of variables so that they are sufficiently large to handle
  64-bit pointers.
- Emit instructions to set register $28 in a function prologue after
  instructions which store callee-saved registers have been emitted. 
 

llvm-svn: 148917

expand offsets that do not fit in the 16-bit immediate field of load and store
instructions. Also change the types of variables so that they are sufficiently
large to handle 64-bit pointers.

llvm-svn: 148916

inttypes.h is not supplied in msvc.

llvm-svn: 148912

llvm-svn: 148909

Add a test case to show fewer instructions are needed to load an immediate
with the new way of loading immediates.

llvm-svn: 148908