Commit Graph

15939 Commits

Author SHA1 Message Date
Chris Lattner 7e885005ba add a note
llvm-svn: 31477
2006-11-06 21:26:49 +00:00
Jim Laskey 235aeef9e1 Tab interferes with uniqueness.
NOTE: There doesn't seem to be consistency for whether a leading tab
is present in a section heading.

llvm-svn: 31475
2006-11-06 16:23:59 +00:00
Jim Laskey f39064c2de D'oh - reversed logic.
llvm-svn: 31474
2006-11-06 13:20:29 +00:00
Evan Cheng eb99bd736a Add comment.
llvm-svn: 31473
2006-11-06 08:14:30 +00:00
Jeff Cohen 7d6f3db3e2 Unbreak VC++ build.
llvm-svn: 31464
2006-11-05 19:31:28 +00:00
Reid Spencer 35b927e0d3 Fix a bug in the last patch and convert to && instead of & for logical expr.
llvm-svn: 31463
2006-11-05 19:26:37 +00:00
Reid Spencer 6088f8af16 Implement the -enabled-cbe-printf-a feature.
llvm-svn: 31462
2006-11-05 17:09:41 +00:00
Nick Lewycky 67bad5adbc Remove commented line from earlier debugging.
llvm-svn: 31460
2006-11-05 14:19:40 +00:00
Evan Cheng 33157700d9 Added pre-indexed store support.
llvm-svn: 31459
2006-11-05 09:31:14 +00:00
Evan Cheng 1a1e23eff7 Added getIndexedStore.
llvm-svn: 31458
2006-11-05 09:30:09 +00:00
Jim Laskey 01c55a50b1 Live local variables are being dropped because the begin or end labels marking
their scope are being deleted.  Workaround is to widen scope to full function.

llvm-svn: 31454
2006-11-04 10:48:07 +00:00
Evan Cheng fd2c5dd806 Changes to use operand constraints to process two-address instructions.
llvm-svn: 31453
2006-11-04 09:44:31 +00:00
Chris Lattner 2959789c92 encode BLR predicate info for the JIT
llvm-svn: 31450
2006-11-04 05:42:48 +00:00
Chris Lattner 6be726048e Go through all kinds of trouble to mark 'blr' as having a predicate operand
that takes a register and condition code.  Print these pieces of BLR the
right way, even though it is currently set to 'always'.

Next up: get the JIT encoding right, then enhance branch folding to produce
predicated blr for simple examples.

llvm-svn: 31449
2006-11-04 05:27:39 +00:00
Evan Cheng 51733ed4a3 Fixed some spiller bugs exposed by the recent two-address code changes. Now
there may be other def(s) apart from the use&def two-address operand. We need
to check if the register reuse for a use&def operand may conflicts with another
def. Provide a mean to recover from the conflict if it is detected when the
defs are processed later.

llvm-svn: 31439
2006-11-04 00:21:55 +00:00
Chris Lattner c8a68d08c3 Describe PPC predicates, which are a pair of CR# and condition.
llvm-svn: 31438
2006-11-03 23:53:25 +00:00
Chris Lattner 4905d2c5b4 initial steps to getting the predicate on PPC::BLR right.
llvm-svn: 31437
2006-11-03 23:52:18 +00:00
Chris Lattner 4fcc04a32a remove dead var
llvm-svn: 31436
2006-11-03 23:50:15 +00:00
Chris Lattner 9ac6442db6 remove dead/redundant vars
llvm-svn: 31435
2006-11-03 23:48:56 +00:00
Chris Lattner eb7128465d remove redundant/dead vars
llvm-svn: 31434
2006-11-03 23:47:20 +00:00
Chris Lattner 895d199348 remove dead vars
llvm-svn: 31433
2006-11-03 23:46:45 +00:00
Andrew Lenharth 0ebb0b03e6 The wrong parameter was being tested to deturmine i32 vs i64
llvm-svn: 31431
2006-11-03 22:45:50 +00:00
Chris Lattner 2048373e71 add a note
llvm-svn: 31429
2006-11-03 22:27:39 +00:00
Chris Lattner ea2abe2384 Fix BasicAA/2006-11-03-BasicAAVectorCrash.ll by handling out-of-range
vector accesses like we handle out-of-range array accesses.

llvm-svn: 31427
2006-11-03 21:58:48 +00:00
Chris Lattner bb3ea2a437 this will work better
llvm-svn: 31419
2006-11-03 19:15:55 +00:00
Chris Lattner a35f8c16c4 Fix the build on xcode < 2.4
llvm-svn: 31417
2006-11-03 19:13:59 +00:00
Andrew Lenharth 01a4a5d07e Split the External and Intrinsic handling into seperate functions. This
improves readability of the call handling code significantly, as well as
makes it clear which parts are hacky (externals) and which parts are good
(call handling).

No functionality change.

llvm-svn: 31415
2006-11-03 17:43:19 +00:00
Evan Cheng 9456dd8b81 Fix comments.
llvm-svn: 31414
2006-11-03 07:31:32 +00:00
Evan Cheng 1dfd26a151 Rename
llvm-svn: 31413
2006-11-03 07:21:16 +00:00
Reid Spencer 52f958741a Remove dead variable. Fix 80 column violations.
llvm-svn: 31412
2006-11-03 03:30:34 +00:00
Rafael Espindola 4ece5c04f4 revert previous patch
llvm-svn: 31411
2006-11-03 03:08:28 +00:00
Evan Cheng 357017f4a9 Added DAG combiner transformation to generate pre-indexed loads.
llvm-svn: 31410
2006-11-03 03:06:21 +00:00
Evan Cheng c176f038b9 Added isPredecessor.
llvm-svn: 31409
2006-11-03 03:05:24 +00:00
Evan Cheng 299022d514 Proper check for two-addressness.
llvm-svn: 31408
2006-11-03 03:04:46 +00:00
Evan Cheng 94b29e9e91 Dead code.
llvm-svn: 31405
2006-11-03 02:08:41 +00:00
Reid Spencer 6b1fe928b1 Remove some dead code.
llvm-svn: 31401
2006-11-03 01:44:51 +00:00
Rafael Espindola 38b162c1d2 add createCFGSimplificationPass to ARMTargetMachine::addInstSelector
llvm-svn: 31400
2006-11-03 01:39:25 +00:00
Rafael Espindola f16dbf697a assert.h -> cassert
llvm-svn: 31399
2006-11-03 01:38:14 +00:00
Chris Lattner 62e2cad6b8 remove dead code
llvm-svn: 31398
2006-11-03 01:34:58 +00:00
Chris Lattner cd7b92251d silence warning
llvm-svn: 31397
2006-11-03 01:28:29 +00:00
Chris Lattner 799b96be08 silence warning
llvm-svn: 31395
2006-11-03 01:19:31 +00:00
Chris Lattner b974b0a3e1 silence warnings.
llvm-svn: 31394
2006-11-03 01:18:29 +00:00
Chris Lattner de2f0906e4 silence warning
llvm-svn: 31393
2006-11-03 01:13:15 +00:00
Chris Lattner 71f55131d4 silence warnings
llvm-svn: 31392
2006-11-03 01:11:05 +00:00
Reid Spencer c0b1dec892 Make CBackend -pedantic clean.
llvm-svn: 31388
2006-11-03 00:00:57 +00:00
Reid Spencer cb67d99001 Make CodeGen libs -pedantic clean.
llvm-svn: 31387
2006-11-02 23:56:21 +00:00
Rafael Espindola a1fde82b6b #include <assert.h>
llvm-svn: 31386
2006-11-02 23:48:53 +00:00
Chris Lattner 2de0910a1b fix a bug reid noticed
llvm-svn: 31385
2006-11-02 23:39:53 +00:00
Jim Laskey 15d166ba8f 1. Hash not quite right for DIEValues.
2. Not going to use Usage (no significant benefit.)

llvm-svn: 31384
2006-11-02 21:48:18 +00:00
Reid Spencer 9ec8a7555b Remove unused variable.
llvm-svn: 31382
2006-11-02 20:55:40 +00:00
Reid Spencer de46e48420 For PR786:
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting
fall out by removing unused variables. Remaining warnings have to do with
unused functions (I didn't want to delete code without review) and unused
variables in generated code. Maintainers should clean up the remaining
issues when they see them. All changes pass DejaGnu tests and Olden.

llvm-svn: 31380
2006-11-02 20:25:50 +00:00
Jim Laskey 936d546eca General clean up of teh dwarf writer.
1. Most significant is the folding of debug information entries.  This
reduced self hosted -g SelectionDAGISel.s from 120M to 13M and pretty
close to matching .o file sizes with gcc.

2. Debug information entry printing for debugging the dwarf code.

3. Bring all the code closer to llvm standards.

4. Misc. fixes and doc clean ups.

llvm-svn: 31379
2006-11-02 20:12:39 +00:00
Rafael Espindola ac8668d62f move ARMCondCodeToString to ARMAsmPrinter.cpp
remove unused variables from lowerCall

llvm-svn: 31378
2006-11-02 15:00:02 +00:00
Jim Laskey eb0fd251c1 Allow FoldingSet clients to pump up the initial hash size.
llvm-svn: 31377
2006-11-02 14:21:26 +00:00
Reid Spencer 5162c6a67d Remove unused variable.
llvm-svn: 31376
2006-11-02 08:23:44 +00:00
Reid Spencer 3054b14059 Remove unused variables.
llvm-svn: 31375
2006-11-02 08:18:15 +00:00
Reid Spencer b20b6857f3 Remove a function prototype that is no longer needed (REM patch missed it)
llvm-svn: 31374
2006-11-02 08:12:02 +00:00
Reid Spencer 7f311c2f4b Get rid of unused variable.
llvm-svn: 31373
2006-11-02 07:59:59 +00:00
Andrew Lenharth d8b59f67f6 fix 2006-11-01-vastart.ll
llvm-svn: 31371
2006-11-02 03:05:26 +00:00
Reid Spencer 7eb55b395f For PR950:
Replace the REM instruction with UREM, SREM and FREM.

llvm-svn: 31369
2006-11-02 01:53:59 +00:00
Chris Lattner 584a11ae22 Implement the getRegForInlineAsmConstraint method for PPC. With recent
sdisel changes, this eliminates a ton of copies around common inline asms.
For example:

int test2(int Y, int X) {
  asm("foo %0, %1" : "=r"(X): "r"(X));
  return X;
}

now compiles to:

_test2:
        foo r3, r4
        blr

instead of:

_test2:
        mr r2, r4
        foo r2, r2
        mr r3, r2
        blr

GCC produces:

_test2:
        foo r4, r4
        mr r3,r4
        blr

llvm-svn: 31367
2006-11-02 01:44:04 +00:00
Chris Lattner 55402d4403 Allow the getRegForInlineAsmConstraint method to return a register class with
no fixes physreg.  Treat this as permission to use any register in the register
class.  When this happens and it is safe, allow the llvm register allcoator to
allocate the register instead of doing it at isel time.  This eliminates a ton
of copies around common inline asms.  For example:

int test2(int Y, int X) {
  asm("foo %0, %1" : "=r"(X): "r"(X));
  return X;
}

now compiles to:

_test2:
        foo r3, r4
        blr

instead of:

_test2:
        mr r2, r4
        foo r2, r2
        mr r3, r2
        blr

GCC produces:

_test2:
        foo r4, r4
        mr r3,r4
        blr

llvm-svn: 31366
2006-11-02 01:41:49 +00:00
Evan Cheng 93cdd149f7 Rename
llvm-svn: 31364
2006-11-01 23:18:32 +00:00
Evan Cheng d8697deca3 Two-address instructions no longer have to be A := A op C. Now any pair of dest / src operands can be tied together.
llvm-svn: 31363
2006-11-01 23:06:55 +00:00
Devang Patel 2cb4f83b38 There can be more than one PHINode at the start of the block.
llvm-svn: 31362
2006-11-01 23:04:45 +00:00
Evan Cheng 1b2e60e970 Added getTiedToSrcOperand() to check for two-address'ness.
llvm-svn: 31360
2006-11-01 23:00:31 +00:00
Evan Cheng 1359196c4e Clean up.
llvm-svn: 31359
2006-11-01 22:39:30 +00:00
Devang Patel 44519a8feb Handle PHINode with only one incoming value.
This fixes http://llvm.org/bugs/show_bug.cgi?id=979

llvm-svn: 31358
2006-11-01 22:26:43 +00:00
Evan Cheng 47218fab42 CopyFromReg starts a live range so its use should not be considered a floater.
llvm-svn: 31356
2006-11-01 22:17:06 +00:00
Reid Spencer 20ffdbe7c1 Make ScalarEvolution actually use a ZeroExtend expression instead of
having SCZeroExtendExpr be equivalent to SCTruncate

llvm-svn: 31355
2006-11-01 21:53:12 +00:00
Chris Lattner 7cee6ddcd8 give branch folding a simple heuristic to decide which block to split so that
it inserts an uncond branch where it is less likely to cause a problem.  This
fixes some perf issues on ppc.

llvm-svn: 31354
2006-11-01 19:36:29 +00:00
Chris Lattner 5a0bd61c64 Fix GlobalOpt/2006-11-01-ShrinkGlobalPhiCrash.ll and McGill/chomp
llvm-svn: 31352
2006-11-01 18:03:33 +00:00
Rafael Espindola 3576405a26 print null values in bss
llvm-svn: 31349
2006-11-01 14:26:44 +00:00
Rafael Espindola 0cd8d14c7c implement zextload bool and truncstore bool
llvm-svn: 31348
2006-11-01 14:13:27 +00:00
Evan Cheng 91f120f4fa Add a printSetLabel that takes two id's.
llvm-svn: 31347
2006-11-01 09:23:08 +00:00
Chris Lattner eebea43b48 Factor gep instructions through phi nodes.
llvm-svn: 31346
2006-11-01 07:43:41 +00:00
Chris Lattner 14f82c7dcd Turn a phi of many loads into a phi of the address and a single load of the
result.  This can significantly shrink code and exposes identities more
aggressively.

llvm-svn: 31344
2006-11-01 07:13:54 +00:00
Evan Cheng 94e5bc9e83 Fix ldmxcsr JIT encoding.
llvm-svn: 31343
2006-11-01 06:53:52 +00:00
Chris Lattner dc826fc068 Fix a bug in the previous patch
llvm-svn: 31342
2006-11-01 04:55:47 +00:00
Chris Lattner cadac0c5c3 Fold things like "phi [add (a,b), add(c,d)]" into two phi's and one add.
This triggers thousands of times on multisource.

llvm-svn: 31341
2006-11-01 04:51:18 +00:00
Evan Cheng 415f365e5c Print jumptable index.
llvm-svn: 31340
2006-11-01 04:48:30 +00:00
Reid Spencer 5e2e0cb9aa Remove unnecessary sign conversions made possible by last patch.
llvm-svn: 31339
2006-11-01 03:45:43 +00:00
Reid Spencer f84930746e Fix a bug in the interpreter where divides of unmatched signed operands
would fail. E.g. udiv sint X, Y  or sdiv uint X, Y would fail to find a
type match in the switch statement and fail the operation.

llvm-svn: 31338
2006-11-01 03:41:05 +00:00
Chris Lattner f505a5a063 make tail merging more aggressive. If two blocks share a common tail, but the
tail is not an entire block for either of them, pick one, split it, then
merge the common part.

llvm-svn: 31336
2006-11-01 01:16:12 +00:00
Chris Lattner 3ac71b31f0 enable branch folding with an option
llvm-svn: 31335
2006-11-01 00:38:31 +00:00
Evan Cheng 7a6a5b9af5 Add constraints to Instruction class.
llvm-svn: 31332
2006-11-01 00:26:27 +00:00
Andrew Lenharth dfbf91e59d more shotenning
llvm-svn: 31331
2006-10-31 23:46:56 +00:00
Chris Lattner fe43befeda Compile CodeGen/PowerPC/fp-branch.ll to:
_intcoord_cond_next55:
LBB1_3: ;cond_next55
        lis r2, ha16(LCPI1_0)
        lfs f0, lo16(LCPI1_0)(r2)
        fcmpu cr0, f1, f0
        blt cr0, LBB1_2 ;cond_next62.exitStub
LBB1_1: ;bb72.exitStub
        li r3, 1
        blr
LBB1_2: ;cond_next62.exitStub
        li r3, 0
        blr

instead of:

_intcoord_cond_next55:
LBB1_3: ;cond_next55
        lis r2, ha16(LCPI1_0)
        lfs f0, lo16(LCPI1_0)(r2)
        fcmpu cr0, f1, f0
        bge cr0, LBB1_1 ;bb72.exitStub
LBB1_4: ;cond_next55
        lis r2, ha16(LCPI1_0)
        lfs f0, lo16(LCPI1_0)(r2)
        fcmpu cr0, f1, f0
        bnu cr0, LBB1_2 ;cond_next62.exitStub
LBB1_1: ;bb72.exitStub
        li r3, 1
        blr
LBB1_2: ;cond_next62.exitStub
        li r3, 0
        blr

llvm-svn: 31330
2006-10-31 23:06:00 +00:00
Chris Lattner 427301fdae look through isunordered to inline it into branch blocks.
llvm-svn: 31328
2006-10-31 22:37:42 +00:00
Evan Cheng a41c2d6432 Nuke dead code.
llvm-svn: 31327
2006-10-31 21:53:31 +00:00
Chris Lattner 44daa50bed allow the address of a global to be used with the "i" constraint when in
-static mode.  This implements PR882.

llvm-svn: 31326
2006-10-31 20:13:11 +00:00
Chris Lattner 60ce558aaa implement the 'c' inline asm modifier character
llvm-svn: 31325
2006-10-31 20:12:30 +00:00
Chris Lattner 1fd360e13a handle global address constant sdnodes
llvm-svn: 31323
2006-10-31 20:01:56 +00:00
Andrew Lenharth 8b20fa42da Let us play simplify the td file (and fix a few missed sub and mul patterns).
llvm-svn: 31322
2006-10-31 19:52:12 +00:00
Chris Lattner f6a6966cd2 handle "st" as "st(0)"
llvm-svn: 31320
2006-10-31 19:42:44 +00:00
Chris Lattner 6f043b90ea TargetLowering::isOperandValidForConstraint
llvm-svn: 31319
2006-10-31 19:41:18 +00:00
Chris Lattner 8c6949e5b2 Change the prototype for TargetLowering::isOperandValidForConstraint
llvm-svn: 31318
2006-10-31 19:40:43 +00:00
Chris Lattner 984d6e1669 generalize the fix for PR977 to also fix
Transforms/LCSSA/2006-10-31-UnreachableBlock-2.ll

llvm-svn: 31317
2006-10-31 18:56:48 +00:00
Chris Lattner eb68f080ef Fix PR977 and Transforms/LCSSA/2006-10-31-UnreachableBlock.ll
llvm-svn: 31315
2006-10-31 17:52:18 +00:00
Andrew Lenharth 692e4155aa Add all that branch mangling niftiness
llvm-svn: 31313
2006-10-31 16:49:55 +00:00
Rafael Espindola 4e825336a0 add support for calling functions when the caller has variable sized objects
llvm-svn: 31312
2006-10-31 13:03:26 +00:00
Anton Korobeynikov aa4c0f9374 1. Clean up code due to changes in SwitchTo*Section(2)
2. Added partial debug support for mingw\cygwin targets (the same as
   Linux\ELF). Please note, that currently mingw\cygwin uses 'stabs' format
   for storing debug info by default, thus many (runtime) libraries has
   this information included. These formats shouldn't be mixed in one binary
   ('stabs' & 'DWARF'), otherwise binutils tools will be confused.

llvm-svn: 31311
2006-10-31 08:31:24 +00:00
Chris Lattner 968f803928 Turn an assert into an error message. This is commonly triggered when
we don't support a specific constraint yet.  When this happens, print the
unsupported constraint.

llvm-svn: 31310
2006-10-31 07:33:13 +00:00
Anton Korobeynikov 49993529eb Unbreaking static ctors patch.
Defaulting second arguments of SwitchTo*Section, this should make things
somehow clearer.

llvm-svn: 31306
2006-10-31 06:11:06 +00:00
Evan Cheng e6d584765f Fix a typo which can break jumptables.
llvm-svn: 31305
2006-10-31 02:31:00 +00:00
Reid Spencer 2545fe6d93 Make this compile again.
llvm-svn: 31304
2006-10-31 01:45:56 +00:00
Evan Cheng de5ecd6bc1 Apply Aton's LLVM patch for PR973: Linux ctors / dtors support.
llvm-svn: 31303
2006-10-31 01:26:55 +00:00
Reid Spencer 7eda51d4cf Fix a problem introduced by a last-minute change (logic negation).
llvm-svn: 31302
2006-10-30 23:34:32 +00:00
Chris Lattner 3e36e07db2 fix miscompilation of llvm.isunordered, where we branched on the opposite
condition.  This fixes miscompilation of Olden/bh and many others.

llvm-svn: 31301
2006-10-30 23:02:25 +00:00
Reid Spencer b51b5c0b1f Add debug support for X86/ELF targets (Linux). This allows llvm-gcc4
generated object modules to be debugged with gdb. Hopefully this helps
pre-release debugging.

llvm-svn: 31299
2006-10-30 22:32:30 +00:00
Chris Lattner 7443600ef8 fix wonky indentation
llvm-svn: 31298
2006-10-30 22:27:23 +00:00
Devang Patel bf0a5c2d56 Update comment. Valid option is -debug-pass=Structures.
llvm-svn: 31297
2006-10-30 19:25:54 +00:00
Jim Laskey ad2f5b7d18 Switch abbreviations to use the folding set.a.
llvm-svn: 31296
2006-10-30 15:59:54 +00:00
Jim Laskey 43c19124bb Simplify DwarfWriter header.
llvm-svn: 31295
2006-10-30 13:35:07 +00:00
Evan Cheng 0d41d19427 All targets expand BR_JT for now.
llvm-svn: 31294
2006-10-30 08:02:39 +00:00
Evan Cheng 84a28d4e76 Lower jumptable to BR_JT. The legalizer can lower it to a BRIND or let the target custom lower it.
llvm-svn: 31293
2006-10-30 08:00:44 +00:00
Evan Cheng c3e695137d Added a new SDNode type: BR_JT for jumptable branch.
llvm-svn: 31292
2006-10-30 07:59:36 +00:00
Chris Lattner 149e666baf add a highly efficient hash table that is specialized for mapping C strings
to some other type.

llvm-svn: 31286
2006-10-29 23:42:03 +00:00
Chris Lattner b9de90377f Add a new llvm::Allocator abstraction, which will be used by a container
I'm about to add.  This is similar to, but necessarily different than, the
STL allocator class.

llvm-svn: 31285
2006-10-29 22:08:03 +00:00
Chris Lattner fc519cd2d1 Fix SimplifyCFG/2006-10-29-InvokeCrash.ll, a crash compiling QT.
llvm-svn: 31284
2006-10-29 21:21:20 +00:00
Chris Lattner 504eeda365 Make CanFallThrough more intelligent (so it can handle blocks with (e.g.) no
successors), and make island block movement more general.

This compiles CodeGen/X86/2006-04-27-ISelFoldingBug.ll to:

_loadAndRLEsource_no_exit_2E_1_label_2E_0:
        subl $8, %esp
        movl %esi, 4(%esp)
        movl %ebx, (%esp)
        movl 16(%esp), %eax
        movl 12(%esp), %ecx
LBB1_3: #label.0
        movl _last, %edx
        movl %edx, %esi
        incl %esi
        movl %esi, _last
        movl %ecx, %ebx
        # TRUNCATE movb %bl, %bl
        movl _block, %esi
        movb %bl, 1(%esi,%edx)
        cmpl %eax, _last
        jge LBB1_2      #codeRepl5.exitStub
LBB1_4: #label.0
        cmpl $257, %ecx
        je LBB1_2       #codeRepl5.exitStub
LBB1_1: #label.0.no_exit.1_crit_edge.exitStub
        movl $1, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_2: #codeRepl5.exitStub
        xorl %eax, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret

instead of:

_loadAndRLEsource_no_exit_2E_1_label_2E_0:
        subl $8, %esp
        movl %esi, 4(%esp)
        movl %ebx, (%esp)
        movl 16(%esp), %eax
        movl 12(%esp), %ecx
        jmp LBB1_3      #label.0
LBB1_1: #label.0.no_exit.1_crit_edge.exitStub
        movl $1, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_2: #codeRepl5.exitStub
        xorl %eax, %eax
        movl (%esp), %ebx
        movl 4(%esp), %esi
        addl $8, %esp
        ret
LBB1_3: #label.0
        movl _last, %edx
        movl %edx, %esi
        incl %esi
        movl %esi, _last
        movl %ecx, %ebx
        # TRUNCATE movb %bl, %bl
        movl _block, %esi
        movb %bl, 1(%esi,%edx)
        cmpl %eax, _last
        jge LBB1_2      #codeRepl5.exitStub
LBB1_4: #label.0
        cmpl $257, %ecx
        jne LBB1_1      #label.0.no_exit.1_crit_edge.exitStub
        jmp LBB1_2      #codeRepl5.exitStub

... which is much better layout :)

llvm-svn: 31282
2006-10-29 21:05:41 +00:00
Chris Lattner e60ae823e8 fix Generic/2006-10-29-Crash.ll
llvm-svn: 31281
2006-10-29 21:01:20 +00:00
Chris Lattner f31b9ef458 Fix a load folding issue that Evan noticed: there is no need to export values
used by comparisons in the main block.

llvm-svn: 31279
2006-10-29 18:23:37 +00:00
Jim Laskey 179ebd3fc3 Try again.
llvm-svn: 31278
2006-10-29 09:19:59 +00:00
Jim Laskey 8f05a611e9 Not handling zero length strings.
llvm-svn: 31277
2006-10-29 08:27:07 +00:00
Evan Cheng 7ab6123c42 VLOAD is not the LoadSDNode opcode.
llvm-svn: 31276
2006-10-29 06:14:47 +00:00
Nick Lewycky dc146a9fb9 Remove spurious case. EXTLOAD is not one of the node opcodes.
llvm-svn: 31275
2006-10-29 02:26:30 +00:00
Chris Lattner bba52191fa split critical edges more carefully and intelligently. In particular, critical
edges whose destinations are not phi nodes don't bother us.  Also, share
split edges, since the split edge can't have a phi.  This significantly
reduces the complexity of generated code in some cases.

llvm-svn: 31274
2006-10-28 19:22:10 +00:00
Chris Lattner c07657f59b Teach branch folding to fold identical jump tables together and to delete
jump tables that are dead.

llvm-svn: 31273
2006-10-28 18:34:47 +00:00
Chris Lattner cde339cf1e const'ify jump table stuff
llvm-svn: 31269
2006-10-28 18:17:09 +00:00
Chris Lattner 28328f9a0a add an assert
llvm-svn: 31267
2006-10-28 18:11:20 +00:00
Chris Lattner 28bfe389d1 don't print dead jump tables
llvm-svn: 31266
2006-10-28 18:10:06 +00:00
Chris Lattner 113f7470e6 implement the BlockHasNoFallThrough hook
llvm-svn: 31264
2006-10-28 17:35:02 +00:00
Chris Lattner af8383806b improve deletion of blocks that just contain branches by knowing that
the pred block doesn't fall through into them if it's a jumptable.

llvm-svn: 31263
2006-10-28 17:32:47 +00:00
Chris Lattner 53ebf20c26 add another target hook for branch folding.
llvm-svn: 31262
2006-10-28 17:29:57 +00:00
Jim Laskey eef273a16f Load and stores have not been uniqued properly.
llvm-svn: 31261
2006-10-28 17:25:28 +00:00
Chris Lattner 3e6b1c6157 Split *all* critical edges before isel. This resolves issues with spill code
being inserted on unsplit critical edges, which introduces (sometimes large
amounts of) partially dead spill code.

This also fixes PR925 + CodeGen/Generic/switch-crit-edge-constant.ll

llvm-svn: 31260
2006-10-28 17:04:37 +00:00
Chris Lattner 3e763f5708 add option to isCriticalEdge
llvm-svn: 31258
2006-10-28 06:58:17 +00:00
Chris Lattner a6eb7e0803 break edges more intelligently
llvm-svn: 31257
2006-10-28 06:45:33 +00:00
Chris Lattner 80ea207bfa Expose a smarter way to break critical edges.
llvm-svn: 31256
2006-10-28 06:44:56 +00:00
Chris Lattner 400ac04e64 SplitCriticalEdge checks to see if an edge is critical, don't check twice
llvm-svn: 31255
2006-10-28 06:38:14 +00:00
Chris Lattner b78eb6c8d1 Fix a serious bug that caused any x86 vector stuff to infinite loop
llvm-svn: 31254
2006-10-28 06:15:26 +00:00
Evan Cheng ae8c29a7d3 Doh. Must check if GV is constant first before putting it in .cstring.
llvm-svn: 31253
2006-10-28 05:56:51 +00:00
Evan Cheng 0d782b4c60 Doh. Must check if GV is constant first.
llvm-svn: 31252
2006-10-28 05:56:06 +00:00
Chris Lattner 23540b142c add a method
llvm-svn: 31249
2006-10-28 01:24:05 +00:00
Chris Lattner 5191c65485 prepare for a change I'm about to make
llvm-svn: 31248
2006-10-28 00:59:20 +00:00
Chris Lattner a6873c0f88 don't dist internal readme
llvm-svn: 31247
2006-10-28 00:51:15 +00:00
Chris Lattner acc6b37d0d don't dist internal readme's
llvm-svn: 31246
2006-10-28 00:49:54 +00:00
Chris Lattner 3be52bb570 don't distribute internal readme's
llvm-svn: 31245
2006-10-28 00:48:27 +00:00
Reid Spencer 247e09a07c Make sure all the readme files get distributed.
llvm-svn: 31244
2006-10-28 00:11:39 +00:00
Jim Laskey bd0f088743 Clean up.
llvm-svn: 31243
2006-10-27 23:52:51 +00:00
Chris Lattner 84a035056e Fix a bug in merged condition handling (CodeGen/Generic/2006-10-27-CondFolding.ll).
Add many fewer CFG edges and PHI node entries.  If there is a switch which has
the same block as multiple destinations, only add that block once as a successor/phi
node (in the jumptable case)

llvm-svn: 31242
2006-10-27 23:50:33 +00:00
Jim Laskey f576b42bb2 Switch over from SelectionNodeCSEMap to FoldingSet.
llvm-svn: 31240
2006-10-27 23:46:08 +00:00
Chris Lattner 28174f5a3a this doesn't occur any more in mason
llvm-svn: 31236
2006-10-27 22:02:19 +00:00
Chris Lattner 4c0cc53da1 the code in question is now:
cmpw cr0, r7, r3
        ble cr0, LBB1_5 ;bb25
LBB1_8: ;bb17
        cmpw cr0, r8, r5
        bgt cr0, LBB1_2 ;bb

which is just as good as crnand.

llvm-svn: 31235
2006-10-27 22:00:55 +00:00
Chris Lattner b9392fb635 remove debug code
llvm-svn: 31233
2006-10-27 21:58:03 +00:00
Chris Lattner f1b54fd7a5 Codegen cond&cond with two branches. This compiles (f.e.) PowerPC/and-branch.ll to:
cmpwi cr0, r4, 4
        bgt cr0, LBB1_2 ;UnifiedReturnBlock
LBB1_3: ;entry
        cmplwi cr0, r3, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

instead of:

        cmpwi cr7, r4, 4
        mfcr r2
        addic r4, r3, -1
        subfe r3, r4, r3
        rlwinm r2, r2, 30, 31, 31
        or r2, r2, r3
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock
LBB1_1: ;cond_true

llvm-svn: 31232
2006-10-27 21:54:23 +00:00
Chris Lattner ed0110b949 Turn conditions like x<Y|z==q into multiple blocks.
This compiles Regression/CodeGen/X86/or-branch.ll into:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $5, %eax
        jl LBB1_1       #cond_true
LBB1_3: #entry
        testl %ecx, %ecx
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

instead of:

_foo:
        subl $12, %esp
        call L_bar$stub
        movl 20(%esp), %eax
        movl 16(%esp), %ecx
        cmpl $4, %eax
        setg %al
        testl %ecx, %ecx
        setne %cl
        testb %cl, %al
        jne LBB1_2      #UnifiedReturnBlock
LBB1_1: #cond_true
        call L_bar$stub
        addl $12, %esp
        ret
LBB1_2: #UnifiedReturnBlock
        addl $12, %esp
        ret

And on ppc to:

        cmpwi cr0, r29, 5
        blt cr0, LBB1_1 ;cond_true
LBB1_3: ;entry
        cmplwi cr0, r30, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

instead of:

        cmpwi cr7, r4, 4
        mfcr r2
        addic r4, r3, -1
        subfe r30, r4, r3
        rlwinm r29, r2, 30, 31, 31
        and r2, r29, r30
        cmplwi cr0, r2, 0
        bne cr0, LBB1_2 ;UnifiedReturnBlock

llvm-svn: 31230
2006-10-27 21:36:01 +00:00
Evan Cheng e056dd5928 Fixed a significant bug where unpcklpd is incorrectly used to extract element 1 from a v2f64 value.
llvm-svn: 31228
2006-10-27 21:08:32 +00:00
Jim Laskey cef515fcc0 SmallVector append not insert.
llvm-svn: 31224
2006-10-27 19:38:32 +00:00
Jim Laskey a9e9cae33e Grrr.
llvm-svn: 31223
2006-10-27 19:20:12 +00:00
Jim Laskey a88e609c0f Temp patch for missing functionality.
llvm-svn: 31222
2006-10-27 19:14:16 +00:00
Reid Spencer 115511f2e2 Make the Value and Type methods print a newline so it prints nicely in gdb
llvm-svn: 31221
2006-10-27 18:58:54 +00:00
Evan Cheng bf3df77758 Fix for PR968: expand vector sdiv, udiv, srem, urem.
llvm-svn: 31220
2006-10-27 18:49:08 +00:00
Bill Wendling e0412f500e MathExtras isn't in the llvm/ADT directory but in the llvm/Support directory.
llvm-svn: 31219
2006-10-27 18:47:29 +00:00
Jim Laskey 6ca4a345dd Apply editorials.
llvm-svn: 31218
2006-10-27 18:05:12 +00:00
Jim Laskey 43bc1847a2 Breakout folding hash set from SelectionDAGCSEMap.
llvm-svn: 31215
2006-10-27 16:16:16 +00:00
Reid Spencer e54243f030 Initialize CStringSection member var.
llvm-svn: 31214
2006-10-27 16:14:06 +00:00
Evan Cheng f53ae69365 Change load PatFrag to ignore indexed load.
llvm-svn: 31210
2006-10-26 21:55:50 +00:00
Evan Cheng 96d6bf50ae getPreIndexedLoad -> getIndexedLoad.
llvm-svn: 31209
2006-10-26 21:53:40 +00:00
Evan Cheng e1e06c2de8 Place cstrings in .cstring section.
llvm-svn: 31207
2006-10-26 21:48:57 +00:00
Evan Cheng e974da6bb7 Speed up isCString()
llvm-svn: 31206
2006-10-26 21:48:03 +00:00
Reid Spencer 00c482b7a2 Simplify code a bit by changing instances of:
InsertNewInstBefore(new CastInst(Val, ValTy, Val->GetName()), I)
into:
   InsertCastBefore(Val, ValTy, I)

llvm-svn: 31204
2006-10-26 19:19:06 +00:00
Evan Cheng 392f645783 Put cstrings in .cstring section when compiling for Mac OS X.
llvm-svn: 31203
2006-10-26 19:18:18 +00:00
Evan Cheng 3763c5b1c4 Add isCString() - returns true if a ConstantArray is a CString.
llvm-svn: 31201
2006-10-26 19:15:05 +00:00
Chris Lattner 91386800ea Fix Transforms/InstCombine/2006-10-26-VectorReassoc.ll
llvm-svn: 31200
2006-10-26 18:27:26 +00:00
Chris Lattner fac5f9110c Add isFPOrFPVector() method, which indicates if a type is either FP or a
vector of FP types.

llvm-svn: 31198
2006-10-26 18:22:45 +00:00
Rafael Espindola a23166d6a4 initial support for frame pointers
llvm-svn: 31197
2006-10-26 13:31:26 +00:00
Reid Spencer c6b52da458 Enclose a case in { and } so that the pickier compilers don't complain.
llvm-svn: 31196
2006-10-26 06:17:40 +00:00
Reid Spencer 7e80b0b31e For PR950:
Make necessary changes to support DIV -> [SUF]Div. This changes llvm to
have three division instructions: signed, unsigned, floating point. The
bytecode and assembler are bacwards compatible, however.

llvm-svn: 31195
2006-10-26 06:15:43 +00:00
Nick Lewycky 5b979ae531 Fix 2006-10-25-AddSetCC. A relational operator (like setlt) can never
produce an EQ property.

llvm-svn: 31193
2006-10-26 02:35:18 +00:00
Reid Spencer 810dd064aa Make the makefile tell us when Intrinsics.gen is being updated.
llvm-svn: 31191
2006-10-26 01:42:23 +00:00
Nick Lewycky 9d17c82a26 Resurrect r1.25.
Fix and comment the "or", "and" and "xor" transformations.

llvm-svn: 31189
2006-10-25 23:48:24 +00:00
Chris Lattner 0d4479b77d simplify code
llvm-svn: 31188
2006-10-25 22:21:37 +00:00
Evan Cheng c415c5be49 During vector shuffle lowering, we sometimes commute a vector shuffle to try
to match MOVL (movss, movsd, etc.). Don't forget to commute it back and try
unpck* and shufp* if that doesn't pan out.

llvm-svn: 31186
2006-10-25 21:49:50 +00:00
Evan Cheng 7e065ff7e4 X86ISD::PEXTRW 3rd operand type is always target pointer type.
llvm-svn: 31185
2006-10-25 21:35:05 +00:00
Chris Lattner 53f53db919 hide symbols properly
llvm-svn: 31184
2006-10-25 21:14:31 +00:00
Evan Cheng 798b306311 Remove -disable-x86-shuffle-opti
llvm-svn: 31183
2006-10-25 20:48:19 +00:00
Chris Lattner 9feb308d51 turn off tail merging for now
llvm-svn: 31180
2006-10-25 18:08:50 +00:00
Chris Lattner 7a7835deb4 be more aggressive about matching identical instructions.
llvm-svn: 31179
2006-10-25 18:08:14 +00:00
Devang Patel 71b99297aa Move getPreferredAlignmentLog from AsmPrinter to TargetData
llvm-svn: 31171
2006-10-24 20:32:14 +00:00
Rafael Espindola bd29281e97 expand ISD::VACOPY
llvm-svn: 31170
2006-10-24 20:15:21 +00:00
John Criswell 6af0b120b8 Removed extraneous semi-colon; this was prevening the grammar file from
bison'ing correctly.

llvm-svn: 31169
2006-10-24 19:09:48 +00:00
Chris Lattner 61bcf9154d visitSwitchCase knows how to insert conditional branches well. Change
visitBr to just call visitSwitchCase, eliminating duplicate logic.

llvm-svn: 31167
2006-10-24 18:07:37 +00:00
Chris Lattner 963ddad31a Generalize CaseBlock a bit more:
Rename LHSBB/RHSBB to TrueBB/FalseBB.  Allow the RHS value to be null,
in which case the LHS is treated as a bool.

llvm-svn: 31166
2006-10-24 17:57:59 +00:00
Chris Lattner 9030fc690a Fix CodeGen/IA64/ret-0.ll, which has apparently been broken since some of the
isel changes happened months ago.

llvm-svn: 31164
2006-10-24 17:09:43 +00:00
Rafael Espindola ed32883b27 fix warning about missing newline at end of file
llvm-svn: 31162
2006-10-24 17:07:11 +00:00
Chris Lattner 3f179d24c6 generalize 'CaseBlock'. It really allows any comparison to be inserted.
llvm-svn: 31161
2006-10-24 17:03:35 +00:00
Chris Lattner aaeede0aa2 implement uncond branch insertion, mark branches with isBranch.
llvm-svn: 31160
2006-10-24 16:47:57 +00:00
Chris Lattner ccd7704354 implement uncond branch insertion for the branch folding pass
llvm-svn: 31159
2006-10-24 16:44:55 +00:00
Chris Lattner 042d56230e implement uncond branch insertion so alpha works work branchfolding.
llvm-svn: 31158
2006-10-24 16:41:36 +00:00
Chris Lattner b7267bd034 implement uncond branch insertion for sparc to fix regressions from last night
due to branchfolding

llvm-svn: 31157
2006-10-24 16:39:19 +00:00
Chris Lattner f054003ba7 new bad case
llvm-svn: 31156
2006-10-24 16:12:47 +00:00
Jim Laskey 1941bfa361 Don't do dead block elimination in fast mode.
llvm-svn: 31155
2006-10-24 16:11:49 +00:00
Jim Laskey a916192267 LinearScanner hotspot.
llvm-svn: 31153
2006-10-24 14:35:25 +00:00
Jim Laskey 516cd40b5c Tighter data structure for deleted debug labels.
llvm-svn: 31152
2006-10-24 11:50:43 +00:00
Chris Lattner ebb1ad4382 Fix Transforms/ScalarRepl/2006-10-23-PointerUnionCrash.ll
llvm-svn: 31151
2006-10-24 06:26:32 +00:00
Chris Lattner ceb51d8427 move single basic blocks that are neither fallen into nor fall out of into
a place more useful.  In particular, if we can put them in a place where code
will be able to fall into it, do so.  Otherwise, put it in a place it can fall
through into a successor.  Otherwise, if preventing a fallthrough, move to the
end of the function, out of the way.

This deletes several hundred unconditional branches from spass.

llvm-svn: 31149
2006-10-24 01:12:32 +00:00
Chris Lattner d43e8a7429 Add intrinsics for the rest of the DCB* instructions.
llvm-svn: 31148
2006-10-24 01:08:42 +00:00
Chris Lattner dc7b9beb20 Revert back to r1.21, which was the last revision of predsimplify that
passes llvm-gcc bootstrap.

llvm-svn: 31146
2006-10-24 00:36:21 +00:00
Chris Lattner 94866bef35 add moveBefore/moveAfter helper methods
llvm-svn: 31145
2006-10-24 00:02:26 +00:00
Chris Lattner ebdb1d6724 Enable tail merging by default.
llvm-svn: 31140
2006-10-23 22:10:12 +00:00
Rafael Espindola b43efe86f5 implement STRB and STRH
llvm-svn: 31138
2006-10-23 20:34:27 +00:00
Rafael Espindola cd5f662c7b expand ISD::MEMSET
llvm-svn: 31137
2006-10-23 20:08:22 +00:00
Andrew Lenharth 9cdaa53007 Make these hack flags hidden, like other dsa hack flags
llvm-svn: 31136
2006-10-23 19:55:24 +00:00
Andrew Lenharth 0c3211eff0 Revert the aggressive inlining for now, it doesn't handle external correctly
llvm-svn: 31135
2006-10-23 19:53:37 +00:00
Chris Lattner fe7b6ef346 Handle fallout from the recent branch-on-undef changes. This fixes
Prolangs-C/agrep and SCCP/2006-10-23-IPSCCP-Crash.ll

llvm-svn: 31132
2006-10-23 18:57:02 +00:00
Chris Lattner 4c931502cc Minor tweak. Instead of generating:
movl 32(%esp), %eax
        cmpl $1, %eax
        je LBB1_1       #bb
LBB1_4: #entry
        cmpl $2, %eax
        je LBB1_2       #bb2
        jmp LBB1_3      #UnifiedReturnBlock
LBB1_1: #bb

notice that we would miss the fall through and emit this instead:

        movl 32(%esp), %eax
        cmpl $2, %eax
        je LBB1_2       #bb2
LBB1_4: #entry
        cmpl $1, %eax
        jne LBB1_3      #UnifiedReturnBlock
LBB1_1: #bb

llvm-svn: 31130
2006-10-23 18:38:22 +00:00
Jim Laskey 5e1a34032b More complete solution to deleting blocks and debug info.
llvm-svn: 31129
2006-10-23 14:56:37 +00:00
Jim Laskey bd7a1d2b4d [SU]int update - inactive code may get activated someday
llvm-svn: 31128
2006-10-23 14:39:22 +00:00
Nick Lewycky 53b4158448 Remove the Backwards operation. Resolving now works at the time when a
property is added by running through the list of uses of the value and
adding resolved properties to the property set.

llvm-svn: 31126
2006-10-23 01:56:02 +00:00
Chris Lattner 76a7bc8c55 Fix phi node updating for switches lowered to linear sequences of branches.
llvm-svn: 31125
2006-10-22 23:00:53 +00:00
Chris Lattner 4c3ef4782d disable this code for now, it's not yet safely updating phi nodes
llvm-svn: 31124
2006-10-22 22:47:10 +00:00
Nick Lewycky 6f5c30fcec Fix similar missing optimization opportunity in XOR.
llvm-svn: 31123
2006-10-22 22:22:58 +00:00
Chris Lattner bb3084546a this part implemented.
llvm-svn: 31122
2006-10-22 21:40:12 +00:00
Nick Lewycky af2b0571d0 Whoops! Add missing NULL check.
llvm-svn: 31121
2006-10-22 21:38:24 +00:00
Anton Korobeynikov 41a83d7871 Do section switching right way for Mingw\Cygwin and Linux.
This will allow (after llvm-gcc linkage fix) more dummy tests using
libstdc++ to pass on mingw :)

llvm-svn: 31120
2006-10-22 21:37:13 +00:00
Chris Lattner 6d6fc26257 Implement PR964 and Regression/CodeGen/Generic/SwitchLowering.ll
llvm-svn: 31119
2006-10-22 21:36:53 +00:00
Nick Lewycky 2c734f3fc1 Handle "if ((x|y) != 0)" for ints like we do for bools. Fixes missed
optimization opportunity pointed out by Chris Lattner.

llvm-svn: 31118
2006-10-22 21:36:41 +00:00
Nick Lewycky f345008339 AllocaInst can't return a null pointer. Fixes missed optimization
opportunity pointed out by Andrew Lewycky.

llvm-svn: 31115
2006-10-22 19:53:27 +00:00
Chris Lattner 250eff20da Add a workaround for PR962, disabling the more aggressive form of this
transformation.  This speeds up a C++ app 2.25x.

llvm-svn: 31113
2006-10-22 18:42:26 +00:00
Reid Spencer aa1c614784 Don't generate a prototype for _setjmp. At least on Linux, this function
has a different prototype than the one #included from <setjmp.h>. This
patch fixes siod and a number of other test cases on Linux that were
failing the CBE because of this _setjmp issue.

llvm-svn: 31112
2006-10-22 09:58:21 +00:00
Reid Spencer c7212791a4 Regenerate.
llvm-svn: 31111
2006-10-22 07:03:43 +00:00
Reid Spencer 6309fa1438 Remove unneeded CHECK_FOR_ERROR invocations.
llvm-svn: 31110
2006-10-22 07:03:09 +00:00
Chris Lattner 7d1d03445e regenerate
llvm-svn: 31109
2006-10-22 06:08:13 +00:00
Chris Lattner fd3d29a978 change keyword to datalayout
llvm-svn: 31108
2006-10-22 06:07:41 +00:00
Chris Lattner 0489716a67 Change keyword to datalayout
llvm-svn: 31107
2006-10-22 06:06:56 +00:00
Chris Lattner af17096dcf 3 Changes:
1. Better document what is going on here.
2. Only hack on one branch per iteration, making the results less conservative.
3. Handle the problematic case by marking edges executable instead of by
   playing with value lattice states.  This is far less pessimistic, and fixes
   SCCP/ipsccp-gvar.ll.

llvm-svn: 31106
2006-10-22 05:59:17 +00:00
Chris Lattner 9f5a129543 don't break infinite loops
llvm-svn: 31102
2006-10-21 06:11:43 +00:00
Chris Lattner 23f22de26f Implement support for branch reversal, fix a bug in branch analysis.
This provides stuff like:

        cmpw cr0, r15, r29
        mr r14, r15
-       bge cr0, LBB3_111       ;bb656
-       b LBB3_90       ;bb501
+       blt cr0, LBB3_90        ;bb501
 LBB3_111:      ;bb656
        lwz r18, 68(r1)

which is particularly good for dispatch group formation.

llvm-svn: 31101
2006-10-21 06:03:11 +00:00
Chris Lattner 28f17f45be Use branch reversal to do stuff like this:
call L_strcmp$stub
        testl %eax, %eax
-       jne LBB26_208   #cond_true6020
-       jmp LBB26_227   #bb7119
+       je LBB26_227    #bb7119
 LBB26_208:     #cond_true6020
        movl $l31_str14, 4(%esp)

        testl %eax, %eax
-       jne LBB26_704   #cond_true13042
-       jmp LBB26_713   #bb13151
+       je LBB26_713    #bb13151
 LBB26_704:     #cond_true13042
        movl $_str52, 4(%esp)

        cmpl 76(%ecx), %eax
-       jge LBB26_1628  #cond_false63.i.i
-       jmp LBB26_1769  #_Z8makeGridP13mrSurfaceListidiidd.exit.i
+       jl LBB26_1769   #_Z8makeGridP13mrSurfaceListidiidd.exit.i
 LBB26_1628:    #cond_false63.i.i
        movl $0, 48964(%esp)

llvm-svn: 31100
2006-10-21 05:54:00 +00:00
Chris Lattner 3a897f31fa Implement support for branch condition reversal.
llvm-svn: 31099
2006-10-21 05:52:40 +00:00
Chris Lattner 3ca52185af Transform code like:
jle FOO
  jmp BAR
BAR:

into:

  jle FOO
BAR:

... whoa!

llvm-svn: 31098
2006-10-21 05:43:30 +00:00
Chris Lattner d881660366 Simplify code, no functionality change
llvm-svn: 31097
2006-10-21 05:42:09 +00:00
Chris Lattner 94e04442eb implement support for inserting a cond branch
llvm-svn: 31096
2006-10-21 05:36:13 +00:00
Chris Lattner 6fca75ec05 allow insertion of a conditional branch with fall-through
llvm-svn: 31095
2006-10-21 05:34:23 +00:00
Chris Lattner 4fe01c42ca Three changes:
1. Remove a bunch of ifdef'd code.
2. When a block just contains an uncond branch, change all blocks branching
   to it to jump to the destination instead.
3. If branch analysis tells us some edges in the machinecfg are not actually
   possible, remove them.

 triggers a suprisingly large number of times.

llvm-svn: 31094
2006-10-21 05:08:28 +00:00
Chris Lattner 20e75d4635 update assert message
llvm-svn: 31093
2006-10-21 04:42:29 +00:00
Chris Lattner 60c9d4dc76 Add an experimental cross-jumping implementation.
This is currently disabled by default and limited in several ways, but does
have a positive effect.

llvm-svn: 31090
2006-10-21 00:47:49 +00:00
Chris Lattner 33f5af09e4 implement MachineOperand::isIdenticalTo
llvm-svn: 31088
2006-10-20 22:39:59 +00:00