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Author SHA1 Message Date
Chris Lattner
9c390fa13f When printing out a function, make sure that local and global symbols 
don't conflict.  This fixes Assembler/2004-12-05-LocalGlobalSymtabConflict.ll

llvm-svn: 18532
 2004-12-05 06:44:09 +00:00
Chris Lattner
cdcd7126f1 Add a new method 
llvm-svn: 18531
 2004-12-05 06:43:27 +00:00
Alkis Evlogimenos
687155333f Fix PR475. 
llvm-svn: 18515
 2004-12-05 01:51:20 +00:00
Reid Spencer
7d7b54310d Distribute headers and license files too 
llvm-svn: 18505
 2004-12-04 22:34:21 +00:00
Reid Spencer
8cddd97526 Provide more information in the error message that occurs when there are 
unresolved constants remaining.

llvm-svn: 18502
 2004-12-04 22:19:53 +00:00
Chris Lattner
8f849baa59 Check in some patches for better assertions 
llvm-svn: 18500
 2004-12-04 21:28:47 +00:00
Chris Lattner
17ebff094f This patch prevents an infinite recursion while compiling 103.su2cor. 
All SPEC CFP 95 programs now work, though the JIT isn't loading -lf2c right
so they aren't testing correctly.

llvm-svn: 18499
 2004-12-04 20:54:32 +00:00
Chris Lattner
32d0c4ce02 Fix linkage of mismatched weak globals. This unbreaks 300.twolf 
llvm-svn: 18494
 2004-12-04 18:54:48 +00:00
Chris Lattner
8bd875f0de Do not allow bytecode files with unresolved references to be read. Doing 
so lets wierd ConstantPlaceholder objects sneak into the system which
confuses it greatly.

llvm-svn: 18487
 2004-12-04 05:28:27 +00:00
Chris Lattner
66d0cdd8ec Fix compilation error on Darwin. 
llvm-svn: 18485
 2004-12-04 04:17:20 +00:00
Alkis Evlogimenos
7202acacf7 Check if a block has a terminator first before calling front() on 
it. If a block has a terminator then it is certainly non-empty so the
verifier will not crash on it.

llvm-svn: 18484
 2004-12-04 02:30:42 +00:00
Alkis Evlogimenos
edf490b75e Make error msg reflect what exactly went wrong. 
llvm-svn: 18478
 2004-12-04 01:25:06 +00:00
Chris Lattner
9245823389 Prevent accessing past the end of the intervals vector, this fixes 
Prolang-C/bison in the JIT

llvm-svn: 18477
 2004-12-04 01:22:09 +00:00
Chris Lattner
cfb8e1d6c8 Remove darwin specific majik 
llvm-svn: 18467
 2004-12-03 23:02:55 +00:00
Chris Lattner
c8009d368d Move darwin-specific majik here. 
llvm-svn: 18466
 2004-12-03 23:02:42 +00:00
Chris Lattner
5d27646680 Significantly rework linker support for global variables, allowing it to 
correctly link globals whose LLVM types do not match.

This fixes several of the F2C SPEC FP benchmarks, which were failing this
due to the implementation of common blocks used by f2c.

llvm-svn: 18465
 2004-12-03 22:18:41 +00:00
Chris Lattner
40e7175e44 Fix test/Regression/CodeGen/CBackend/2004-12-03-ExternStatics.ll and 
PR472

llvm-svn: 18459
 2004-12-03 17:19:10 +00:00
Chris Lattner
a5a08f5484 Implement stripping of debug symbols, making the --strip-debug options in 
gccas/gccld more than just a noop.

llvm-svn: 18456
 2004-12-03 16:22:08 +00:00
Chris Lattner
378036ed74 Do not look here for elegance. 
This fixes the ugly darwin "cannot find symbols starting with __" issue.

Thanks for Owen/resistor for testing this out for me.

llvm-svn: 18454
 2004-12-03 07:16:51 +00:00
Brian Gaeke
cabac53133 This code rotted - change it to call abort() until someone wants 
to rewrite this to use relocations.

llvm-svn: 18453
 2004-12-03 06:57:14 +00:00
Tanya Lattner
d24558ac54 When writing kernel, save the branches til the end. They are still put in the "right place" in the schedule, but sometimes when folding to make a kernel instructions are added between branches. This is wrong. To avoid this, we handle branches special. 
llvm-svn: 18450
 2004-12-03 05:25:22 +00:00
Chris Lattner
99c8cf8ef8 Fix a regression caused by the previous patch 
llvm-svn: 18449
 2004-12-03 05:13:15 +00:00
Chris Lattner
45529acebd Initial reimplementation of the -strip pass, with a stub for implementing 
-S

llvm-svn: 18440
 2004-12-02 21:25:03 +00:00
Chris Lattner
d742c10964 This pass is moving to lib IPO 
llvm-svn: 18439
 2004-12-02 21:24:40 +00:00
Chris Lattner
eb18ce7a43 The stripping pass as we know it is about to disappear 
llvm-svn: 18436
 2004-12-02 21:05:01 +00:00
John Criswell
faf1e07531 Reverting revision 1.209. 
Including alloca.h on Solaris brings in the prototype of strftime(), which
breaks compilation of CBE generated code.

llvm-svn: 18435
 2004-12-02 19:02:49 +00:00
Chris Lattner
316f923a9c Spill/restore X86 floating point stack registers with 64-bits of precision 
instead of 80-bits of precision.  This fixes PR467.

This change speeds up fldry on X86 with LLC from 7.32s on apoc to 4.68s.

llvm-svn: 18433
 2004-12-02 18:17:31 +00:00
Chris Lattner
dfdd49b7af Consider 64-bit registers to be FP as well. 
llvm-svn: 18432
 2004-12-02 17:57:21 +00:00
Reid Spencer
356384fbdb PR466: 
* Make the linker find lib*.bca files now instead of lib*.bc since those
  are what the makefiles now generate for bytecode archives.
* Make sure the linker only links archives when LinkLibraries is called.
  Previously if it found a lib*.bc file and that file was a bytecode file,
  it would link in the entire bytecode. This could make -lc -lc fail with
  duplicate symbols error but it shouldn't as searching multiple libraries,
  even the same one more than once, is permitted.
* Now that the above problems are corrected, implement the dependent libs
  feature. After the module is linked with all specified libraries, the
  LinkLibraries function will obtain the set of dependent libraries from
  the linked modules and attemp to find and link against those libraries.

llvm-svn: 18428
 2004-12-02 09:52:10 +00:00
Reid Spencer
f16e254d8a Fix seriously broken implementation of GetMagicNumber. 
llvm-svn: 18422
 2004-12-02 09:09:48 +00:00
Tanya Lattner
01adb68f38 Reworked branch adding in prologue. Added check for infinite loops which are not modulo scheduled. 
llvm-svn: 18419
 2004-12-02 07:22:15 +00:00
Chris Lattner
afb31cf723 Implement a FIXME by checking to make sure that a malloc is not being used 
in scary and unknown ways before we promote it.  This fixes the miscompilation
of 188.ammp that has been plauging us since a globalopt patch went in.

Thanks a ton to Tanya for helping me diagnose the problem!

llvm-svn: 18418
 2004-12-02 07:11:07 +00:00
Chris Lattner
fd541d4228 Fix a minor bug where we set a var to initialized on malloc, not on store. 
This doesn't fix anything that I'm aware of, just noticed it by inspection

llvm-svn: 18417
 2004-12-02 06:25:58 +00:00
Tanya Lattner
893f987574 Reverting this patch: 
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20041122/021428.html

It broke Mutlisource/Applications/obsequi

llvm-svn: 18407
 2004-12-01 18:27:03 +00:00
Chris Lattner
a94cee5109 Initial support for packed types, contributed by Morten Ofstad 
llvm-svn: 18406
 2004-12-01 17:14:28 +00:00
Chris Lattner
e4350af487 Remove unneeded cast. 
llvm-svn: 18405
 2004-12-01 17:13:05 +00:00
Chris Lattner
08d8b2ecaa Get GEP's working with packed types. Contributed by Morten Ofstad! 
llvm-svn: 18404
 2004-12-01 17:12:16 +00:00
Reid Spencer
af68e19395 Revert version 1.39. It breaks the ordering of the library processing. 
llvm-svn: 18399
 2004-11-30 22:54:48 +00:00
Chris Lattner
0abd8109fa Do not let GCC emit a warning for INT64_MIN 
llvm-svn: 18398
 2004-11-30 21:33:58 +00:00
Brian Gaeke
48f8e8b05a Sparcs behave better if we use <alloca.h> and avoid messing with __builtin_alloca. 
llvm-svn: 18397
 2004-11-30 21:27:01 +00:00
Chris Lattner
1196903800 Fix the JIT when being used from llvm-db 
llvm-svn: 18391
 2004-11-30 17:41:49 +00:00
Chris Lattner
23c9c1bb62 This pass is completely broken. 
llvm-svn: 18387
 2004-11-30 17:09:06 +00:00
Chris Lattner
d6020eabef RevisionNum is read by error(), initialize it early. 
llvm-svn: 18386
 2004-11-30 16:58:18 +00:00
Brian Gaeke
289f3d3cc4 Update list of failing benchmarks. 
llvm-svn: 18384
 2004-11-30 08:15:44 +00:00
Brian Gaeke
2d52bbf6eb If we're about to emit something like: 
%f0 = fmovs %f0
  %f1 = fmovs %f1

then just delete the FpMOVD pseudo-instruction instead.  Also, add
statistics and debug printouts.

llvm-svn: 18383
 2004-11-30 08:15:15 +00:00
Chris Lattner
c58bc8d96e Squelch warning 
llvm-svn: 18381
 2004-11-30 07:47:34 +00:00
Chris Lattner
2231d21dad Fix several bugs in 'op x, imm' handling. Foremost is that we now emit 
addi r3, r3, -1
instead of
   addi r3, r3, 1

for 'sub int X, 1'.

Secondarily, this fixes several cases where we could crash given an unsigned
constant.  And fixes a couple of minor missed optimization cases, such as
xor X, ~0U -> not X

llvm-svn: 18379
 2004-11-30 07:30:20 +00:00
Reid Spencer
b392dd6861 Up the compression threshold to 64K so we avoid it for all but the largest 
bytecode files. This should help linking substantially.

llvm-svn: 18378
 2004-11-30 07:13:34 +00:00
Chris Lattner
537e5a6b50 Fix test/Regression/Transforms/LICM/2004-09-14-AliasAnalysisInvalidate.llx 
This only fails on darwin or on X86 under valgrind.

llvm-svn: 18377
 2004-11-30 07:01:15 +00:00
Chris Lattner
1e093bfb2b Fix CodeGen/PowerPC/2004-11-30-shr-var-crash.ll 
llvm-svn: 18376
 2004-11-30 06:40:04 +00:00
Chris Lattner
629965fbe0 Fix test/Regression/CodeGen/PowerPC/2004-11-29-ShrCrash.ll 
llvm-svn: 18374
 2004-11-30 06:36:11 +00:00
Chris Lattner
23a2a6e5d3 Fix test/Regression/CodeGen/PowerPC/2004-11-30-shift-crash.ll 
llvm-svn: 18371
 2004-11-30 06:29:10 +00:00
Chris Lattner
25b93fea2a Alkis noticed that this variable is dead. Thanks! 
llvm-svn: 18369
 2004-11-30 04:01:44 +00:00
Chris Lattner
e561ef0261 Add method 
llvm-svn: 18368
 2004-11-30 02:51:53 +00:00
Chris Lattner
b237a19a78 If we have something like this: 
if (x) {
    code
    ...
  } else {
    code
    ...
  }

Turn it into:

  code
  if (x) {
    ...
  } else {
    ...
  }

This reduces code size and in some common cases allows us to completely
eliminate the conditional.  This turns several if/then/else blocks in loops
into straightline code in 179.art, turning the loops into single basic blocks
(good for modsched even!).

Maybe now brg will leave me alone ;-)

llvm-svn: 18366
 2004-11-30 00:29:14 +00:00
Chris Lattner
679cc8deab Remove extraneous namespacification. In particular, don't define llvm::llvm::createInternalGlobalMapperPass 
llvm-svn: 18365
 2004-11-30 00:22:59 +00:00
Chris Lattner
ba782edfb7 Allow hoisting loads of globals and alloca's in conditionals. 
llvm-svn: 18363
 2004-11-29 21:26:12 +00:00
Reid Spencer
e978501448 Functionality moved to portable lib/System/DynamicLibrary.cpp 
implementation

llvm-svn: 18358
 2004-11-29 14:11:41 +00:00
Reid Spencer
74b17227a5 Use System/DynamicLibrary instead of Support/DynamicLinker 
llvm-svn: 18357
 2004-11-29 14:11:29 +00:00
Reid Spencer
e4efcbf807 Use System/DynamicLibrary instead of Support/DynamicLinker to implement. 
llvm-svn: 18356
 2004-11-29 14:07:46 +00:00
Reid Spencer
66b4a250cf Implement two new functions: LoadLibraryPermanently and 
SearchForAddressOfSymbol.

llvm-svn: 18355
 2004-11-29 13:33:28 +00:00
Reid Spencer
e76c012f3a Shared library extension is now in LTDL_SHLIB_EXT 
llvm-svn: 18353
 2004-11-29 12:40:21 +00:00
Reid Spencer
c0b0d036b3 We just use ltdl's implementation for this abstraction now. Its portable to 
more platforms than LLVM supports.

llvm-svn: 18352
 2004-11-29 12:39:10 +00:00
Reid Spencer
e498308615 Mods for compilation with llvm. 
llvm-svn: 18346
 2004-11-29 12:04:27 +00:00
Reid Spencer
42ceb789ad Original version of ltdl.h from libtool 1.5.10 
llvm-svn: 18345
 2004-11-29 12:02:48 +00:00
Reid Spencer
93069daab2 Original version of ltdl.c from libtool 1.5.10 
llvm-svn: 18344
 2004-11-29 12:02:25 +00:00
Reid Spencer
9e369115fc Implement the default constructor which causes the current program to be 
opened as if it was a dynamic library so its symbols can be searched too.

llvm-svn: 18341
 2004-11-29 10:39:46 +00:00
Chris Lattner
9c400f3b28 Revamp long/ulong comparisons to use a much more efficient sequence (thanks 
to Brian and the Sun compiler for pointing out that the obvious works :)

This also enables folding all long comparisons into setcc and branch
instructions: before we could only do == and !=

For example, for:
void test(unsigned long long A, unsigned long long B) {
   if (A < B) foo();
 }

We now generate:

test:
        subl $4, %esp
        movl %esi, (%esp)
        movl 8(%esp), %eax
        movl 12(%esp), %ecx
        movl 16(%esp), %edx
        movl 20(%esp), %esi
        subl %edx, %eax
        sbbl %esi, %ecx
        jae .LBBtest_2  # UnifiedReturnBlock
.LBBtest_1:     # then
        call foo
        movl (%esp), %esi
        addl $4, %esp
        ret
.LBBtest_2:     # UnifiedReturnBlock
        movl (%esp), %esi
        addl $4, %esp
        ret

Instead of:

test:
        subl $12, %esp
        movl %esi, 8(%esp)
        movl %ebx, 4(%esp)
        movl 16(%esp), %eax
        movl 20(%esp), %ecx
        movl 24(%esp), %edx
        movl 28(%esp), %esi
        cmpl %edx, %eax
        setb %al
        cmpl %esi, %ecx
        setb %bl
        cmove %ax, %bx
        testb %bl, %bl
        je .LBBtest_2   # UnifiedReturnBlock
.LBBtest_1:     # then
        call foo
        movl 4(%esp), %ebx
        movl 8(%esp), %esi
        addl $12, %esp
        ret
.LBBtest_2:     # UnifiedReturnBlock
        movl 4(%esp), %ebx
        movl 8(%esp), %esi
        addl $12, %esp
        ret

llvm-svn: 18330
 2004-11-29 05:55:24 +00:00
Tanya Lattner
4b705a5897 Reworked branching so we don't handle BAs specially. It just updates the branchTO regardless of what type of branch it is. 
llvm-svn: 18322
 2004-11-29 04:39:47 +00:00
Tanya Lattner
819de3ccd4 Fixed bug where instructions in the kernel were not ordered right to preserve dependencies in a cycle. 
llvm-svn: 18314
 2004-11-28 23:36:15 +00:00
Reid Spencer
dd287f7758 Fix for PR454: 
* Make sure we handle signed to unsigned conversion correctly
* Move this visitSetCondInst case to its own method.

llvm-svn: 18312
 2004-11-28 21:31:15 +00:00
Chris Lattner
1de5cd0fd0 The LLVM bool type shall have 1 byte alignment on PPC. 
llvm-svn: 18311
 2004-11-28 21:16:45 +00:00
Chris Lattner
7301399232 Make DSE potentially more aggressive by being more specific about alloca sizes. 
llvm-svn: 18309
 2004-11-28 20:44:37 +00:00
Chris Lattner
e65724d6eb Fix DeadStoreElimination/2004-11-28-LiveStoreDeleted.ll 
llvm-svn: 18308
 2004-11-28 20:30:15 +00:00
Chris Lattner
c3750aa2a3 Fix SingleSource/UnitTests/2004-11-28-GlobalBoolLayout.c, and hopefully 
PR449

llvm-svn: 18306
 2004-11-28 17:56:47 +00:00
Chris Lattner
bf49c461ef Fix PR463 
llvm-svn: 18303
 2004-11-28 16:45:45 +00:00
Reid Spencer
49f3fe5d81 Compute the firstFileOffset correctly after reading the LLVM symbol table. 
llvm-svn: 18300
 2004-11-28 03:13:02 +00:00
Chris Lattner
3c35e1e02b When merging to alias sets, if they are both must alias, the result is not 
a must alias set unless all of the pointers in the resultant set are must
aliased together.

llvm-svn: 18275
 2004-11-27 18:37:42 +00:00
Chris Lattner
2c4161fc57 Implement Regression/Transforms/InstCombine/getelementptr_cast.ll, which 
occurs many times in crafty

llvm-svn: 18273
 2004-11-27 17:55:46 +00:00
Nate Begeman
6048139b1f Remove the ISel->AsmPrinter link via the TargetMachine that was put in 
place to help bring up the PowerPC back end on Darwin.  This code is no
longer serves any purpose now that the AsmPrinter does the right thing
all the time printing GlobalValues.  --Cruft.

llvm-svn: 18267
 2004-11-27 04:45:11 +00:00
Chris Lattner
ab36efe42b Add a new interface 
llvm-svn: 18266
 2004-11-26 21:36:25 +00:00
Chris Lattner
8715ef738f Provide size information when checking to see if we can LICM a load, this 
allows us to hoist more loads in some cases.

llvm-svn: 18265
 2004-11-26 21:20:09 +00:00
Chris Lattner
fca424bb51 When evaluating an AA, pass in size info 
llvm-svn: 18264
 2004-11-26 21:05:39 +00:00
Chris Lattner
47987cf373 There is no reason to store <x,x>, just store <x>. 
llvm-svn: 18263
 2004-11-26 20:25:17 +00:00
Chris Lattner
aecb6daf08 The trick with globals actually works with allocas and malloc too 
llvm-svn: 18262
 2004-11-26 20:01:48 +00:00
Chris Lattner
e076e608d8 A store or load cannot alias a global if the accessed amount is larger then 
the global.

This implements Regression/Analysis/BasicAA/global-size.ll

llvm-svn: 18261
 2004-11-26 19:20:01 +00:00
Reid Spencer
55435b0e39 Add bzip2 subdirectory 
llvm-svn: 18251
 2004-11-25 19:38:28 +00:00
Reid Spencer
04f1391e49 Remove zlib support in favor of our own bzip2 library 
llvm-svn: 18250
 2004-11-25 19:38:16 +00:00
Reid Spencer
d841d33637 Adjust to Compressor interface change 
llvm-svn: 18249
 2004-11-25 19:38:05 +00:00
Reid Spencer
3d3a296606 Revise to LLVM makefile standards. 
llvm-svn: 18246
 2004-11-25 16:12:25 +00:00
Reid Spencer
be86b4d506 Initial Version from bzip2 Release 1.0.2. 
llvm-svn: 18245
 2004-11-25 16:11:36 +00:00
Reid Spencer
8cf334425d Implement dependent library linking. It is no longer required that -lstdc++ 
-lstdsup++ no -lc be passed on the command line to llvm linkers if the
progam being linked was compiled with the C/C++ Front End or Stacker.

llvm-svn: 18243
 2004-11-25 09:32:08 +00:00
Reid Spencer
c7b5efd4b9 Remove blank comment lines for uniformity. 
Make sure lines don't exceed 80 cols.

llvm-svn: 18242
 2004-11-25 09:29:44 +00:00
Nate Begeman
6405f5e9b3 Enable optimization suggested by Chris Lattner to not emit reloc stubs for 
static global variables whose addresses are taken.  This allows us to
convert the following code for taking the address of a static function foo

        addis r2, r30, ha16(Ll1__2E_foo_2$non_lazy_ptr-"L00001$pb")
        lwz r3, lo16(Ll1__2E_foo_2$non_lazy_ptr-"L00001$pb")(r2)

which also includes linker stub code emitted at the end of the .s file not
shown here, and replace it with this:

        addis r2, r30, ha16(l1__2E_foo_2-"L00001$pb")
        la r3, lo16(l1__2E_foo_2-"L00001$pb")(r2)

which in addition to not needing linker help, also has no load instruction.
For those not up on PowerPC mnemonics, la is shorthand for add immediate.

llvm-svn: 18239
 2004-11-25 07:09:01 +00:00
Chris Lattner
98ddaa680d Fix the build on non ppc machines 
llvm-svn: 18235
 2004-11-25 06:14:45 +00:00
Chris Lattner
026387ccbc The JIT works enough 
llvm-svn: 18228
 2004-11-25 04:14:54 +00:00
Chris Lattner
671d625e17 Fix encoding of fsel, fixing olden/power, McCat/bisort and several others. 
All of Olden passes now! :)

llvm-svn: 18227
 2004-11-25 04:11:07 +00:00
Chris Lattner
1f6882a401 Fix encoding of fneg instruction 
llvm-svn: 18226
 2004-11-25 03:53:44 +00:00
Chris Lattner
1a5a39e9ec Fix encoding of swari, fixing several programs, including Olden/mst 
llvm-svn: 18225
 2004-11-25 03:40:20 +00:00
Chris Lattner
01269e6ad3 There is not a 1-1 mappign between llvm blocks and PPC blocks, do not use 
LLVM blocks as the keys for the branch rewriter.  This fixes treeadd and
many other programs with the JIT.

llvm-svn: 18223
 2004-11-25 00:33:57 +00:00
Chris Lattner
ebbfaa3db8 * Rename existing relocations to be more specific 
* Add relocations for refernces to non-lazy darwin stubs and implement
  them correctly.

With this change, we can correctly references external globals, and now
all but two UnitTests and all but 1 Regression/C tests pass.

More importantly, bugpoint-jit will start giving us useful testcases,
instead of always telling us that references to external globals don't
work :)

llvm-svn: 18222
 2004-11-24 22:30:08 +00:00
Nate Begeman
e9b752c4e3 Add the same optimization that we do loading from fixed alloca slots to 
storing to fixed alloca slots.

llvm-svn: 18221
 2004-11-24 21:53:14 +00:00
Chris Lattner
4b48c12388 Write CompilationCallback as an explicit assembly stub to avoid getting GCC's 
prolog.

llvm-svn: 18220
 2004-11-24 21:01:46 +00:00
Chris Lattner
961fae4d82 When rewriting the original call instruction, make sure to rewrite it to 
call the right address.

llvm-svn: 18213
 2004-11-24 18:00:02 +00:00
Chris Lattner
8cd0215f14 Force the intregs ptr into R2 and the FPregs ptr into R3. This fixes a really 
obscure problem where we were doing:

lmw     r3,0(r9)

which is undefined on PPC.  Now we do:

lmw     r3,0(r2)

by force, not relying on the GCC register allocator for luck :)

llvm-svn: 18212
 2004-11-24 17:42:55 +00:00
Reid Spencer
1c55479db5 Implement and document prefix options with arbitrary values including an 
= sign. This needed to support -DNAME=value options as pass-through in
llvmc.

llvm-svn: 18203
 2004-11-24 06:13:42 +00:00
Brian Gaeke
8d69439f39 Update list of failing benchmarks. 
llvm-svn: 18202
 2004-11-24 04:07:42 +00:00
Brian Gaeke
3bb57935a7 Fix bug in emitGEPOperation with large struct-member offsets. 
llvm-svn: 18201
 2004-11-24 04:07:33 +00:00
Chris Lattner
de6bb17359 Fix a few more tests by encoding the extsb and other XForm11 instructions 
correctly.

llvm-svn: 18200
 2004-11-24 03:52:02 +00:00
Chris Lattner
338b1b4634 Fix the encoding of ORi and other DForm4 instructions. This brings us to 
36/42 SingleSource/UnitTests passing!

llvm-svn: 18199
 2004-11-24 02:15:41 +00:00
Chris Lattner
2c1b140d62 Loads are relocatable too 
llvm-svn: 18198
 2004-11-24 02:03:44 +00:00
Chris Lattner
ef7794a7c6 Calls do not need a MovPCtoLR instruction 
llvm-svn: 18197
 2004-11-24 02:00:06 +00:00
Chris Lattner
9e59b1f3b5 Get constant pools working. This fixes even more programs, allowing us to 
pass 24/42 in UnitTests (up from 20).

llvm-svn: 18196
 2004-11-24 01:56:12 +00:00
Tanya Lattner
1d440e4782 Forced branches to be first to be scheduled. 
llvm-svn: 18195
 2004-11-24 01:49:10 +00:00
Chris Lattner
a4fd491b8d Rewrite branches more closely to correct. This makes more stuff pass, and 
stops the infinite loops!

llvm-svn: 18194
 2004-11-24 01:35:12 +00:00
Chris Lattner
a8184a2882 Branch instructions explicitly represent CRx in them. bEcause of this, encode 
them explicitly as well.

llvm-svn: 18193
 2004-11-24 01:15:19 +00:00
Nate Begeman
f8b9f49dc8 Fix encoding of bctrl, and remove some unused instructions 
llvm-svn: 18192
 2004-11-24 00:16:37 +00:00
Reid Spencer
da5beb436a Allow reading of member names that begin with an _ character. 
llvm-svn: 18179
 2004-11-23 22:35:39 +00:00
Chris Lattner
f50b42adc1 Fix encoding of blr and bctr 
llvm-svn: 18178
 2004-11-23 22:06:24 +00:00
Nate Begeman
9b9c78b3e2 Use the correct register class as a constaint to gcc's inline assembly, so 
that we don't end up trying to use r0 as a base register.

llvm-svn: 18176
 2004-11-23 21:37:22 +00:00
Nate Begeman
7ae4c39fc6 Save/Restore arg regs and nonvolatile regs the compiler might use during 
CompilationCallback

llvm-svn: 18175
 2004-11-23 21:34:18 +00:00
Chris Lattner
08eb9d0d18 Fix the encoding of OR, AND and many other instructions 
llvm-svn: 18174
 2004-11-23 21:17:35 +00:00
Brian Gaeke
ce245ef743 Support shr long/ulong. 
llvm-svn: 18173
 2004-11-23 21:10:50 +00:00
Brian Gaeke
29093f7ec7 Support printing ConstantAggregateZeros. 
llvm-svn: 18172
 2004-11-23 21:10:49 +00:00
Brian Gaeke
371faf708f Update failing SingleSource test-case list. 
llvm-svn: 18171
 2004-11-23 21:10:48 +00:00
Chris Lattner
04a25df638 Remove argtype and argcount magic, which was used by the old asmprinter. 
llvm-svn: 18170
 2004-11-23 20:41:34 +00:00
Chris Lattner
9a57aafc94 Get rid of flags that are dead 
llvm-svn: 18169
 2004-11-23 20:37:41 +00:00
Chris Lattner
88fcda18b8 Fix encoding of rlwinm? 
llvm-svn: 18165
 2004-11-23 19:23:32 +00:00
Chris Lattner
512b1d6c2a Fix encodings 
llvm-svn: 18164
 2004-11-23 19:23:18 +00:00
Chris Lattner
cb15c858c2 Enumerate CR registers 
llvm-svn: 18162
 2004-11-23 18:59:59 +00:00
Chris Lattner
4cad3e8fbc Initial implementation of exiting CompilationCallback 
This should save all argument registers on entry and restore on exit, despite
that, simple things seem to work!!!

llvm-svn: 18161
 2004-11-23 18:49:46 +00:00
Chris Lattner
141a71cf32 This method is dead 
llvm-svn: 18160
 2004-11-23 18:47:55 +00:00
Chris Lattner
9554912215 Remove this method. 
llvm-svn: 18159
 2004-11-23 18:47:42 +00:00
Chris Lattner
aa5a51292c Squelch a bogus warning 
llvm-svn: 18157
 2004-11-23 15:57:01 +00:00
Chris Lattner
e8e62c5431 Squelch a bogus warning. 
llvm-svn: 18156
 2004-11-23 15:56:38 +00:00
Nate Begeman
f096183b46 Don't return value from void function. This is only temporary anyway while 
the JIT is made to work!

llvm-svn: 18155
 2004-11-23 10:04:49 +00:00
Brian Gaeke
b63c34a9f9 pseudocode for 64-bit lshr. 
llvm-svn: 18154
 2004-11-23 08:14:09 +00:00
Chris Lattner
b8eb5dabd7 Fix a minor bug 
llvm-svn: 18153
 2004-11-23 06:56:31 +00:00
Chris Lattner
30c5ade43e Be really paranoid about not breaking stuff yet 
llvm-svn: 18152
 2004-11-23 06:56:18 +00:00
Chris Lattner
8bb3fbffa3 Implement the first hunk of CompilationCallback. The pieces missing are the 
ones noted, which require funny PPC specific inline assembly.

If some angel felt the desire to help me, I think this is that last bit missing
for JIT support (however, generic code emitter might night work right with
the constant pool yet).

llvm-svn: 18151
 2004-11-23 06:55:05 +00:00
Brian Gaeke
398eb11ede Add more known-failing tests. 
llvm-svn: 18149
 2004-11-23 06:39:50 +00:00
Brian Gaeke
218b5b5c65 Add the rest of the logical instructions. 
llvm-svn: 18148
 2004-11-23 06:39:37 +00:00
Chris Lattner
ec9138be44 Implement the stub needed to get into compilation callback. 
llvm-svn: 18147
 2004-11-23 06:27:02 +00:00
Chris Lattner
5ac6f7a36d Simplify code a bit 
llvm-svn: 18146
 2004-11-23 06:05:44 +00:00
Chris Lattner
37a72a9ef2 Initial implementation of the JIT interfaces. Relocation is done and stubs 
for external functions work.  CompilationCallback has not been written, and
stubs for internal functions are not generated yet.  This means you can call
printf and exit, and use global variables, but cannot call functions local to
a module yet.

llvm-svn: 18145
 2004-11-23 06:02:06 +00:00
Chris Lattner
2f47d181d8 Emit relocations for the global variable using instructions. This gets us 
LA, LOADHiAddr, CALLpcrel, and MovePCtoLR working, though the constant pool
probably is not right.

llvm-svn: 18144
 2004-11-23 05:59:53 +00:00
Chris Lattner
17d87ca91f Implement all of the methods 
llvm-svn: 18142
 2004-11-23 05:57:57 +00:00
Chris Lattner
068ade1373 Initial checkin of the 32-bit PPC relocation types 
llvm-svn: 18141
 2004-11-23 05:57:38 +00:00
Chris Lattner
e74f5f8a4e Move JITInfo from PPCTM to PPC32TM 
llvm-svn: 18140
 2004-11-23 05:56:40 +00:00
Chris Lattner
8e3800acc9 Do not provide the non-specialized PowerPCJITInfo object, it is pretty useless. 
Instead, let derived classes provide specialized ones.

llvm-svn: 18139
 2004-11-23 05:55:38 +00:00
Chris Lattner
1b163867c6 LA is really addi. Be consistent with operand ordering to avoid confusing the code emitter 
llvm-svn: 18138
 2004-11-23 05:54:25 +00:00
Tanya Lattner
1d5bef8728 Changed the CreateCodeToLoadConst function to preserve SSA form. This basically means adding extra tmp instructions for intermediate values. 
llvm-svn: 18137
 2004-11-23 04:22:29 +00:00
Chris Lattner
3e3ba3b1cf Remove some dead code 
llvm-svn: 18136
 2004-11-22 23:07:22 +00:00
Chris Lattner
5b68bdb2ce Comment out a couple of unused instructions. 
llvm-svn: 18135
 2004-11-22 23:07:01 +00:00
Chris Lattner
7a34cbf266 Do not push two return addresses on the stack when we call external functions who have their addresses taken. This fixes test-call.ll 
llvm-svn: 18134
 2004-11-22 22:25:30 +00:00
Chris Lattner
76705f0c6b Rename Emitter.cpp -> JITEmitter.cpp 
llvm-svn: 18132
 2004-11-22 22:00:25 +00:00
Chris Lattner
70c19defde Fix the FIXME, nuke the JIT specific forceCompilationOf method. 
llvm-svn: 18131
 2004-11-22 21:54:35 +00:00
Chris Lattner
a020fc1650 Disable this. 
llvm-svn: 18130
 2004-11-22 21:51:40 +00:00
Chris Lattner
d38029313a These methods are obsolete 
llvm-svn: 18129
 2004-11-22 21:48:33 +00:00
Chris Lattner
bab8204396 This chunk of code needs to be rewritten 
llvm-svn: 18127
 2004-11-22 21:45:54 +00:00
Chris Lattner
a0d9f5ba13 Remove some dead vars and some useless namespacification 
llvm-svn: 18126
 2004-11-22 21:42:40 +00:00
Chris Lattner
8923fe6832 Implement a disgusting hack to work around broken machine code emission of 
the RDCCR instruction.  This fixes a bunch of programs with the JIT.

llvm-svn: 18124
 2004-11-22 21:25:10 +00:00
Tanya Lattner
da8a6fc7d4 Fixed a bug where I was trying to ModuloSchedule a loop with no instructions but a terminator. 
Fixed a bug in the schedule generation that was always using the start cycle.

llvm-svn: 18123
 2004-11-22 20:41:24 +00:00
Chris Lattner
9d7ad5bf96 Remove JIT-specific code from the code emitter. 
llvm-svn: 18122
 2004-11-22 20:25:10 +00:00
Chris Lattner
4d5cde4b09 New methods implemented 
llvm-svn: 18121
 2004-11-22 20:24:42 +00:00
Chris Lattner
a3447e02b8 Implement the Sparc JIT interfaces, including relocation support. 
llvm-svn: 18120
 2004-11-22 20:24:27 +00:00
Chris Lattner
7647235f0f Fix test/Regression/CFrontend/2003-11-01-EmptyStructCrash.c 
llvm-svn: 18115
 2004-11-22 19:15:27 +00:00
Chris Lattner
ee2f552b0f Do not count debugger intrinsics in size estimation. 
llvm-svn: 18110
 2004-11-22 17:23:57 +00:00
Chris Lattner
9d1117ed96 Ignore debugger intrinsics when doing inlining size computations. 
llvm-svn: 18109
 2004-11-22 17:21:44 +00:00
Chris Lattner
4b58b75683 Do not consider debug intrinsics in the size computations for loop unrolling. 
Patch contributed by Michael McCracken!

llvm-svn: 18108
 2004-11-22 17:18:36 +00:00
Brian Gaeke
c0c0b053e6 Add stub method for long shift codegen. 
llvm-svn: 18100
 2004-11-22 08:02:06 +00:00
Brian Gaeke
e9a2261d3b Update to-do list. 
llvm-svn: 18099
 2004-11-22 08:02:05 +00:00
Chris Lattner
8909e6452a Support targets that require stubs for external functions better 
llvm-svn: 18098
 2004-11-22 07:24:43 +00:00
Reid Spencer
df25e5b3bb Fix a comment to imply the correct semantics. 
llvm-svn: 18097
 2004-11-22 02:58:47 +00:00
Chris Lattner
1670e9e779 Initial checkin of the V9 relocation types 
llvm-svn: 18095
 2004-11-22 00:40:51 +00:00
Brian Gaeke
52bb1a0073 Implement setcc on longs. 
llvm-svn: 18088
 2004-11-21 08:11:28 +00:00
Brian Gaeke
3904c8ffec Add all the rest of the ADD and SUB variants, some of which are important for 
64-bit support.

llvm-svn: 18087
 2004-11-21 07:13:17 +00:00
Brian Gaeke
cb0a971f8f Support add, sub, mul, div, rem on longs/ulongs (latter 3 by emitting libcalls). 
Add a big comment containing my notes on how to do setcc for longs/ulongs.

llvm-svn: 18086
 2004-11-21 07:13:16 +00:00
Brian Gaeke
3b6aeefea6 Update to-do list. 
llvm-svn: 18085
 2004-11-21 07:13:15 +00:00
Nate Begeman
7ec36ad70f Fix Shootout-C++/wc, which was broken by my recent changes to emit fewer 
reg-reg copies.  The necessary conditions for this bug are a GEP that is
used outside the basic block in which it is defined, whose components
other than the pointer are all constant zero, and where the use is
selected before the definition (backwards branch to successsor block).

llvm-svn: 18084
 2004-11-21 05:14:06 +00:00
Chris Lattner
f4c8575535 There is no reason to emit function stubs for direct calls. 
llvm-svn: 18082
 2004-11-21 03:46:06 +00:00
Chris Lattner
596d18c8dd Clean up DEBUG output 
llvm-svn: 18081
 2004-11-21 03:44:32 +00:00
Chris Lattner
ce43d636fe Allow targets to avoid emitting a stub for EVERY lazily resolved call. In 
most cases (e.g. direct calls) no stub is needed.

llvm-svn: 18080
 2004-11-21 03:37:42 +00:00
Brian Gaeke
e07eb993d6 Fix extraStack calculation -- I think in fact it might be getting a bit *too* 
much stack, but that's better than not enough, which leads to miscompilations.

Fix FP vaarg.

llvm-svn: 18079
 2004-11-21 03:35:22 +00:00
Brian Gaeke
75580d2a09 Update list of failing benchmarks & to-do list. 
llvm-svn: 18078
 2004-11-21 03:35:21 +00:00
Chris Lattner
6d1fb33657 ignore generated files 
llvm-svn: 18073
 2004-11-21 00:01:54 +00:00
Chris Lattner
3e3645938e ignore generated files. 
llvm-svn: 18072
 2004-11-21 00:00:54 +00:00
Chris Lattner
d8c2739b24 Implement relocation support by adding a target independent resolver interface. 
llvm-svn: 18069
 2004-11-20 23:57:07 +00:00
Chris Lattner
4a340e281e Remove all JIT specific code and switch the code generator over to emitting 
relocations for global references.

llvm-svn: 18068
 2004-11-20 23:55:15 +00:00
Chris Lattner
b9a44893e9 Implement the X86 JIT interfaces 
llvm-svn: 18067
 2004-11-20 23:54:33 +00:00
Chris Lattner
8e33311566 Describe the X86 target-specific relocations. 
llvm-svn: 18066
 2004-11-20 23:54:19 +00:00
Chris Lattner
3c20464ad7 We implement these interfaces 
llvm-svn: 18065
 2004-11-20 23:53:56 +00:00
Chris Lattner
37fc0d8b95 Adjust to changed interfaces 
llvm-svn: 18064
 2004-11-20 23:53:26 +00:00
Chris Lattner
c6c7f2ac58 This method does not exist any longer. 
llvm-svn: 18061
 2004-11-20 23:51:03 +00:00
Tanya Lattner
a2cf139875 Fixed assertion from triggering. We need to check if the commandline map is empty before checking if an arg exists. 
llvm-svn: 18057
 2004-11-20 23:35:20 +00:00
Reid Spencer
de847ecdaa Cast the void* handle data member to HMODULE* to keep the VC++ compiler 
happy. Thanks to Henrik Bach for pointing this out.

llvm-svn: 18056
 2004-11-20 23:30:55 +00:00
Brian Gaeke
1805f32d5f Support most cases of vaarg (except double). 
llvm-svn: 18055
 2004-11-20 22:50:42 +00:00
Brian Gaeke
e989dc883f Update failing test cases & to-do list. 
llvm-svn: 18054
 2004-11-20 22:50:41 +00:00
Reid Spencer
f381e95cc6 Distinguish between BSD4.4 and SVR4 symbol tables 
llvm-svn: 18044
 2004-11-20 07:29:40 +00:00
Chris Lattner
275f594cb7 This method was never implemented 
llvm-svn: 18039
 2004-11-20 04:19:47 +00:00
Chris Lattner
3ff7bafe17 Remove this method, it's not clear how it could be implemented indep of 32 or 64-bit mode 
llvm-svn: 18038
 2004-11-20 04:17:17 +00:00
Chris Lattner
beb2cc0b4c getJITStubForFunction is optional and unimplemented, just remove it for now. 
llvm-svn: 18037
 2004-11-20 04:15:38 +00:00
Chris Lattner
e3461cf0bc getJITStubForFunction is optional and unimplemented, just remove it. 
llvm-svn: 18036
 2004-11-20 04:14:44 +00:00
Chris Lattner
d70e6be604 Add getCurrentPCOffset() and addRelocation() methods. 
Add stub support for relocations to finishFunction

llvm-svn: 18035
 2004-11-20 03:46:14 +00:00
Chris Lattner
c0599d0f14 Add getCurrentPCOffset() and addRelocation() methods. 
llvm-svn: 18034
 2004-11-20 03:44:39 +00:00
Brian Gaeke
c72d2a96dc Implement vacopy and vanext. 
llvm-svn: 18031
 2004-11-20 03:32:12 +00:00
Chris Lattner
5bf6fe1636 Add accessor 
llvm-svn: 18030
 2004-11-20 03:11:07 +00:00
Misha Brukman
9dd523842a Allow constructor parameter to override aggregating args; fix spacing 
llvm-svn: 18028
 2004-11-20 02:20:27 +00:00
Misha Brukman
35c8db23b6 Revert the patch that adds Function* for each 64-bit libc div/mul/rem that we 
want to do; instead, we can use MachineInstr::addExternalSymbol(char*, bool) and
thus we don't have to modify the Module as we are code generating for it

llvm-svn: 18025
 2004-11-20 00:10:20 +00:00
Tanya Lattner
b522771244 Made modsched hidden and changed so it matches the style of other options. 
llvm-svn: 18024
 2004-11-19 23:34:33 +00:00
Misha Brukman
9430a3fcb4 Fix grammar 
llvm-svn: 18023
 2004-11-19 23:09:40 +00:00
Misha Brukman
87bfc8b09c Add protoypes for 64-bit long/ulong div, mul, and rem functions 
llvm-svn: 18019
 2004-11-19 22:14:35 +00:00
Misha Brukman
a782ae8ce8 Fix file comment header 
llvm-svn: 18018
 2004-11-19 22:09:21 +00:00
Misha Brukman
dd7ba48322 Handle GhostLinkage case for completeness (should not be seen by the asm writer) 
llvm-svn: 18015
 2004-11-19 21:49:19 +00:00
Brian Gaeke
89f96e4c7c Add VANext and VAArg stubs. 
llvm-svn: 18012
 2004-11-19 21:08:18 +00:00
Brian Gaeke
6224830c11 Implement va_start. 
llvm-svn: 18011
 2004-11-19 20:57:24 +00:00
Chris Lattner
0c79788bc4 Dont' forget to switch back to decimal output 
llvm-svn: 18010
 2004-11-19 20:57:07 +00:00
Chris Lattner
2978400c23 Match change in MachineCodeEmitter prototype. 
llvm-svn: 18009
 2004-11-19 20:56:46 +00:00
Brian Gaeke
e88367016a First part of varargs support: getting all varargs which could possibly 
be in registers into memory.

llvm-svn: 18006
 2004-11-19 20:31:08 +00:00
Brian Gaeke
9c9427b62b va_end can safely be codegen'd to nothing on v8. 
llvm-svn: 18004
 2004-11-19 19:21:34 +00:00
Brian Gaeke
7027432624 A very sorry stub implementation of varargs intrinsics... 
llvm-svn: 18003
 2004-11-19 18:53:59 +00:00
Brian Gaeke
42b684e550 Update list of expected test failures. 
llvm-svn: 18002
 2004-11-19 18:48:29 +00:00
Brian Gaeke
5de5da7603 Fix bug in casting to long/ulong. 
llvm-svn: 18001
 2004-11-19 18:48:10 +00:00
Chris Lattner
d9770db639 Fix memory leaks, patch contributed by Morten Ofstad! 
llvm-svn: 17999
 2004-11-19 17:09:48 +00:00
Chris Lattner
1d11859e8c Patches to avoid "leaking" memory on process exit. Patch contributed by 
Morten Ofstad!

llvm-svn: 17998
 2004-11-19 17:08:15 +00:00
Reid Spencer
1c4d0a214a Correct the computation of when to add the padding. It is not based on the 
member's size. It is based on the oddness/evenness of the file pointer.
This fixes a bug with llvm-ar not being able to read archives produced by
llvm-ranlib when there are members with odd long file name lengths.

llvm-svn: 17997
 2004-11-19 17:08:00 +00:00
Chris Lattner
73b5c56fc1 Fix the exposed prototype for the lower packed pass, thanks to 
Morten Ofstad.

llvm-svn: 17996
 2004-11-19 16:49:34 +00:00
Chris Lattner
7a2566c4ff Add hooks to free all memory allocated by the singleton factories in these 
files.  Patch contributed by Morten Ofstad!

llvm-svn: 17995
 2004-11-19 16:39:44 +00:00
Chris Lattner
a973b1a1a4 CPR is dead. 
llvm-svn: 17992
 2004-11-19 16:24:57 +00:00
Chris Lattner
e5662f4700 Add note that this is for old bytecode files. 
llvm-svn: 17991
 2004-11-19 16:24:05 +00:00
Chris Lattner
598ab60438 Mission accomplished! 
llvm-svn: 17990
 2004-11-19 16:22:24 +00:00
Reid Spencer
e61dec5896 Allow this to compile even on machines that HAVE the bzlib library but do 
NOT have the bzlib.h header file. Go figure.

llvm-svn: 17989
 2004-11-19 15:56:28 +00:00
Chris Lattner
0169ce5e9e This is a horrible hack to work around libstdc++ bugs :( 
llvm-svn: 17988
 2004-11-19 08:44:07 +00:00
Nate Begeman
83cded0ecb Eliminate another 6k register copies that the register allocator would just 
coalesce out of hbd.  Speeds up compilation by 2% (0.6s)

llvm-svn: 17987
 2004-11-19 08:01:16 +00:00
Reid Spencer
c385bbef7b Undo last change as its unnecessary. 
llvm-svn: 17985
 2004-11-19 04:59:07 +00:00
Reid Spencer
640ab4f4f6 Don't save an iterator, just use post-increment. 
llvm-svn: 17981
 2004-11-19 03:44:10 +00:00
Reid Spencer
fb0e585554 Eliminate unsightly ;; 
llvm-svn: 17979
 2004-11-19 03:27:05 +00:00
Reid Spencer
a2e2f5c878 Make a cast explicit. 
llvm-svn: 17977
 2004-11-19 03:20:09 +00:00
Reid Spencer
a181a37bb4 Make findModulesDefiningSymbols modify its symbols argument so we can \ 
eliminate symbols defined by the archive efficiently

llvm-svn: 17976
 2004-11-19 03:18:22 +00:00
Reid Spencer
119f824e80 Reduce the amount of work in LinkInArchive by not searching the archive for 
symbols it has already identified as not defining.

llvm-svn: 17975
 2004-11-19 03:13:25 +00:00
Nate Begeman
de1fd6a162 Generate fewer reg-reg copies for the register allocator to deal with. 
This eliminates over 2000 in hbd alone.

llvm-svn: 17973
 2004-11-19 02:06:40 +00:00
Chris Lattner
ce8249f570 Delete stoppoints that occur for the same source line. 
llvm-svn: 17970
 2004-11-18 21:41:39 +00:00
Tanya Lattner
bd01287efd Fixed to fit in 80 columns. 
llvm-svn: 17961
 2004-11-18 18:47:29 +00:00
Tanya Lattner
d29c748a57 Adding option to llc for ModuloScheduling. By default it is turned off. 
llvm-svn: 17959
 2004-11-18 18:38:01 +00:00
Chris Lattner
a06c8cfe80 These methods are inlined 
llvm-svn: 17958
 2004-11-18 17:47:13 +00:00
Chris Lattner
7fb7c81ebf Check in hook that I forgot 
llvm-svn: 17956
 2004-11-18 17:24:20 +00:00
Brian Gaeke
23969d8817 Rewrite LoadArgumentsToVirtualRegs, making it match almost exactly how 
visitCallInst works.  Support cast of byte/short/int to long.

llvm-svn: 17949
 2004-11-18 07:43:33 +00:00
Brian Gaeke
b01ef957b9 Update current expected failures list - expand it to include all of 
SingleSource. Update to-do list (open-coding refers to binary operations on
longs, not to passing them into functions, which we already support.)

llvm-svn: 17948
 2004-11-18 07:43:32 +00:00
Nate Begeman
567d30174a Eliminate another common source of moves that the register allocator 
shouldn't be forced to coalesce for us: folded GEP operations.  This too
fires thousands of times across the testsuite.

llvm-svn: 17947
 2004-11-18 07:22:46 +00:00
Nate Begeman
3e1aaef2b5 When accessing the base register for global variables, use the register 
directly rather than making a copy for the register allocator to coalesce.
This kills thousands of live intervals across the testsuite.

llvm-svn: 17946
 2004-11-18 06:51:29 +00:00