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

llvm-svn: 13403

llvm-svn: 13402

llvm-svn: 13401

llvm-svn: 13400

llvm-svn: 13399

llvm-svn: 13395

llvm-svn: 13392

llvm-svn: 13391

 bugpoint ... --tool-args -enable-correct-eh-support -regalloc=linearscan --args -- -foo

So that tool-args option gets the -enable-correct-eh-support -regalloc=linearscan flags instead of bugpoint.

llvm-svn: 13389

llvm-svn: 13388

llvm-svn: 13387

When looking at getelementptr instructions, make sure to use a forwarded
type.  We want to do this because a DerivedType may drop its uses and then
refine its users, who may then use another user who hasn't been refined yet.
By getting the forwarded type, we always ensure that we're looking at a
Type that isn't in a halfway refined state.

Now, I should be able to put this stuff in PATypeHandle, but it doesn't work
for some reason.  This should do for now.

llvm-svn: 13386

llvm-svn: 13385