again in the future, it can be resurrected out of CVS

llvm-svn: 15112

* Don't allow negative immediates to users of unsigned immediates
* Fix long compares
* Support <const int>, op as a potential immediate candidate
* Fix sign extension of short and byte loads
* Fix and improve integer casts
* Fix passing of doubles as vararg functions

Patch contributed by Nate Begeman.

llvm-svn: 15109

        mov %EDI, 12
        add %EDI, %ECX
        mov %ECX, 12
        add %ECX, %EDX
        mov %EDX, 12
        add %EDX, %ESI

instead (really!) generate this:

        add %ECX, 12
        add %EDX, 12
        add %ESI, 12

llvm-svn: 15090

* Fix opcode RLWNM -> RLWINM since it uses an immediate const shift value

llvm-svn: 15087

  dyn_cast<>ing and checking Constant's value
* Convert tabs to spaces

llvm-svn: 15086

* Fix printing of `zeroinitializer'
* Fix printing of `linkonce' globals, complete with stubs

llvm-svn: 15084

* Generation of opcodes that take 16 bit immediates
* Rewrote multiply to be correct for 64 bit values
* Rewrote all the long handling to be correct for PowerPC
* Fix visitSelectInst() to define the upper register of the pair of regs
  representing a long value

Patch contributed by Nate Begeman.

llvm-svn: 15083

llvm-svn: 15081

llvm-svn: 15077

printf("%a") support.
Patch contributed by Bill Wendling.

llvm-svn: 15056

llvm-svn: 15048

llvm-svn: 15047

llvm-svn: 15037

* Fix functions that take more than 32 bytes of args
* Alignment of doubles in structs is 4 bytes, not 8
* Fix passing long args: rN = hi, rN+1 = lo
* Rewrite signed divide
* Rewrite Intrinsic::returnaddress

Patch courtesy of Nate Begeman.

llvm-svn: 15036

llvm-svn: 15035

llvm-svn: 15034

llvm-svn: 15026

will avoid extra register-to-register copies.  Thanks to Chris for the idea.

llvm-svn: 15019

`-> asm printer updated to not print out those registers with the call instr

All of Shootout tests now work.  Great thanks to Nate Begeman for the patch!

llvm-svn: 15015

* Fn args passed in registers are now recorded as used by the call instruction
`-> asm printer updated to not print out those registers with the call instr
* Stack frame layout in prolog/epilog fixed, spills and vararg fns now work
* float/double to signed int codegen now correct
* various single precision float codegen bugs fixed
* const integer multiply codegen fixed
* select and setcc blocks inserted into the correct place in machine CFG
* load of integer constant code optimized

All of Shootout tests now work.  Great thanks to Nate Begeman for the patch!

llvm-svn: 15014

llvm-svn: 15013

llvm-svn: 15012

Simplify a conditional operator for a constant result from
GV->isNullValue()

llvm-svn: 15001

llvm-svn: 15000

llvm-svn: 14971

llvm-svn: 14961

llvm-svn: 14960

- Replace ConstantPointerRef usage with GlobalValue usage

llvm-svn: 14953

- Replace ConstantPointerRef usage with GlobalValue usage
- Minimize redundant isa<GlobalValue> usage
- Correct isa<Constant> for GlobalValue subclass

llvm-svn: 14950

- Correct isa<Constant> for GlobalValue subclass

llvm-svn: 14949

shrd [mem], reg, imm

This fixes the jit-ls failure on 186.crafty.

llvm-svn: 14914

llvm-svn: 14913

llvm-svn: 14911

  a funky way to "use" R0 for a 0-valued operand
* Add IMPLICIT_DEFs for incoming function arguments via registers to help the
  register allocator not clobber those registers
* Implement comparisons with longs
* Teach emitSelectOperation() to fold the SetCC operation

Patch contributed by Nate Begeman

llvm-svn: 14901

* Fix comment formatting

llvm-svn: 14900

llvm-svn: 14899

llvm-svn: 14898

llvm-svn: 14897

* Allocate registers 13-31 backwards (to be able to store them all at once)

llvm-svn: 14896

llvm-svn: 14895