in the basic block being processed.  This fixes PhiElimination on kimwitu++
from taking 105s to taking a much more reasonable 0.6s (in a debug build).

llvm-svn: 13453

than before.  Because this is the case, we can compute the first non-phi
instruction once when de-phi'ing a block.  This shaves ~4s off of
phielimination of _Z7yyparsev in kimwitu++ from 109s -> 105s.  There are
still much more important gains to come.

llvm-svn: 13452

compiling things like 'add long %X, 1'.  The problem is that we were switching
the order of the operands for longs even though we can't fold them yet.

llvm-svn: 13451

llvm-svn: 13450

when we see a read of a register.  This is important in cases like:

AL = ...
AH = ...

   = AX

The read of AX must make both the AL and AH defs live until the use.

llvm-svn: 13444

llvm-svn: 13443

llvm-svn: 13442

around the problem with Stacker on Solaris because the Stack can handle
64-bit entries (pointer sized).

llvm-svn: 13441

llvm-svn: 13440

llvm-svn: 13439

syntactically loopify natural loops so that the GCC loop optimizer can find them.  This should *dramatically* improve the performance of CBE compiled code on targets that depend on GCC's loop optimizations (like PPC)

llvm-svn: 13438

llvm-svn: 13437

llvm-svn: 13436

FindUsedTypes manipulation stuff out to be a seperate pass, and make the
main CWriter be a function pass now!

llvm-svn: 13435

Rewrite portability intro.

llvm-svn: 13434

llvm-svn: 13433

llvm-svn: 13432

llvm-svn: 13431

Print all PHI copies for successor blocks before the terminator, whether it be a conditional branch or switch.

llvm-svn: 13430

llvm-svn: 13429

llvm-svn: 13428

llvm-svn: 13427

Also added ModuloScheduling as a friend.

llvm-svn: 13426

llvm-svn: 13425

llvm-svn: 13424

Flesh out the SetCC support... which currently ends in a little bit
of unfinished code (which is probably completely hilarious) for
generating the condition value splitting the basic block up into 4
blocks, like this (clearly a better API is needed for this!):

       BB
   cond. branch
     /         /          R1=1    R2=0
     \      /
      \    /
    R=phi(R1,R2)

Other minor edits.

llvm-svn: 13423

llvm-svn: 13422

llvm-svn: 13421

llvm-svn: 13420

llvm-svn: 13419

Add support for branches (based loosely on X86/InstSelectSimple).
Add support for not visiting phi nodes in the first pass.
Add support for loading bools.
Flesh out support for stores.

llvm-svn: 13418

llvm-svn: 13417

llvm-svn: 13416

        %tmp.0 = getelementptr [50 x sbyte]* %ar, uint 0, int 5         ; <sbyte*> [#uses=2]
        %tmp.7 = getelementptr sbyte* %tmp.0, int 8             ; <sbyte*> [#uses=1]

together.  This patch actually allows us to simplify and generalize the code.

llvm-svn: 13415

when they have to run a gccld shell script without having lli in their path.
This is intended to address Bug 289.

Also, emit the traditional syntax ${1+"$@"} for passing all of a shell script's
args to a subprocess. If you have arguments that have spaces in them, $* will
not preserve the quoting (i.e., the quoted string "foo bar" as an argument will
end up as two arguments "foo" "bar" to lli.)

llvm-svn: 13414

Disable the code that copies long constants to registers - it looks fishy.
Implement some simple casts: integral, smaller than longs, and equal-width
 or narrowing only.

llvm-svn: 13413

allows us to compile:

store float 10.0, float* %P

into:
        mov DWORD PTR [%EAX], 1092616192

instead of:

.CPItest_0:                                     # float 0x4024000000000000
.long   1092616192      # float 10
...
        fld DWORD PTR [.CPItest_0]
        fstp DWORD PTR [%EAX]

llvm-svn: 13409

llvm-svn: 13408

against zero.  In particular, don't emit:

        mov %ESI, 0
        cmp %ECX, %ESI

instead, emit:

       test %ECX, %ECX

llvm-svn: 13407

llvm-svn: 13406