target machine from those that are only needed by codegen. The goal is to
sink the essential target description into MC layer so we can start building
MC based tools without needing to link in the entire codegen.

First step is to refactor TargetRegisterInfo. This patch added a base class
MCRegisterInfo which TargetRegisterInfo is derived from. Changed TableGen to
separate register description from the rest of the stuff.

llvm-svn: 133782

This simplifies many of the target description files since it is common
for register classes to be related or contain sequences of numbered
registers.

I have verified that this doesn't change the files generated by TableGen
for ARM and X86. It alters the allocation order of MBlaze GPR and Mips
FGR32 registers, but I believe the change is benign.

llvm-svn: 133105

The register allocators automatically filter out reserved registers and
place the callee saved registers last in the allocation order, so custom
methods are no longer necessary just for that.

Some targets still use custom allocation orders:

ARM/Thumb: The high registers are removed from GPR in thumb mode. The
NEON allocation orders prefer to use non-VFP2 registers first.

X86: The GR8 classes omit AH-DH in x86-64 mode to avoid REX trouble.

SystemZ: Some of the allocation orders are omitting R12 aliases without
explanation. I don't understand this target well enough to fix that. It
looks like all the boilerplate could be removed by reserving the right
registers.

llvm-svn: 132781

No functional change.

Part of PR6965

llvm-svn: 132763

directives.

Fixes PR9826.

llvm-svn: 132317

llvm-svn: 132278

llvm-svn: 131012

llvm-svn: 130755

Luis Felipe Strano Moraes!

llvm-svn: 129558

In other words, do not keep track of argument's location.  The debugger (gdb) is not prepared to see line table entries for arguments. For the debugger, "second" line table entry marks beginning of function body.
This requires some coordination with debugger to get this working. 
 - The debugger needs to be aware of prolog_end attribute attached with line table entries.
 - The compiler needs to accurately mark prolog_end in line table entries (at -O0 and at -O1+)

llvm-svn: 126155

llvm-svn: 126108

of testing for its presence at cmake time.

This way the build automatically regenerates the makefiles when a svn
update brings in a new sublibrary.

llvm-svn: 126068

other getNode() methods.  Radar 9002173.

llvm-svn: 125665

llvm-svn: 125444

llvm-svn: 124611

Pass sret arguments through the stack instead of through registers in Sparc backend. It makes the code generated more compliant with the sparc32 ABI.

llvm-svn: 124030

llvm-svn: 124027

 Rename FLUSH to FLUSHW.
 Output "ta 3" instead of a "flushw" instruction if v8 instruction set is used.

llvm-svn: 123997

llvm-svn: 123974

with useful instructions.

llvm-svn: 123884

SPARC backend: Modified LowerCall and LowerFormalArguments so that they use CallingConv assignments.

llvm-svn: 123749

llvm-svn: 123561

llvm-svn: 123399

llvm-svn: 123310

ensure %o7 is not assigned as the destination of getpcx instruction.

llvm-svn: 123304

are correctly marked as used instead of passing all possible argument registers
as used.  

llvm-svn: 123301

llvm-svn: 123281

llvm-svn: 123171

Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there.

llvm-svn: 123170

llvm-svn: 122626

Multiple SPARC backend fixes: added Y register; updated select_cc, subx, subxcc defs/uses; 
and fixed CustomInserter.

llvm-svn: 122607

llvm-svn: 122513

something that just glues two nodes together, even if it is
sometimes used for flags.

llvm-svn: 122310

llvm-svn: 119990

llvm-svn: 119740

llvm-svn: 119098

First step of huge frame-related refactoring: move emit{Prologue,Epilogue} out of TargetRegisterInfo to TargetFrameInfo, which is definitely much better suitable place

llvm-svn: 119097

that should be split out is the InstPrinter (if a target is mc'ized).
This change makes all the targets be consistent.

llvm-svn: 119056

value type, so there is no point in passing it around using
an EVT.  Use the simpler MVT everywhere.  Rather than trying
to propagate this information maximally in all the code that
using the calling convention stuff, I chose to do a mainly
low impact change instead.

llvm-svn: 118167

llvm-svn: 114999