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19114 Commits

Author SHA1 Message Date
Dale Johannesen
1ba04f7d87 Make stable_sort in tail merging actually be stable (it never was, but didn't 
matter until my last change).  Reenable tail merging by default.

llvm-svn: 37354
 2007-05-29 23:47:50 +00:00
Evan Cheng
a1300649ba Don't merge in tail block of a diamond if it has more than one predecessors after if-conversion. 
llvm-svn: 37353
 2007-05-29 23:37:20 +00:00
Evan Cheng
3672d15956 For VFP2 fldm, fstm instructions, the condition code is printed after the address mode and size specifier. e.g. fstmiaseq, not fstmeqias. 
llvm-svn: 37351
 2007-05-29 23:34:19 +00:00
Owen Anderson
328c980fad Fix a typo 
llvm-svn: 37350
 2007-05-29 23:34:14 +00:00
Evan Cheng
5df14b3451 For ldrb, strh, etc., the condition code is before the width specifier. e.g. streqh, not strheq. 
llvm-svn: 37349
 2007-05-29 23:32:06 +00:00
Owen Anderson
0f46c29ffd Re-fix a bug, where I was now being too aggressive. 
llvm-svn: 37348
 2007-05-29 23:26:30 +00:00
Owen Anderson
cfeeaac401 Use proper debugging facilities so other people don't have to look at my commented-out 
debugging lines.

llvm-svn: 37347
 2007-05-29 23:15:21 +00:00
Owen Anderson
1e1d693893 Comment debug code out that I accidentally uncommented last time. 
llvm-svn: 37346
 2007-05-29 22:43:03 +00:00
Owen Anderson
707e37c6a6 Add a place where I missed using the maximal set. Note that using the maximal 
set this way is _SLOW_.  Somewhere down the line, I'll look at speeding it up.

llvm-svn: 37345
 2007-05-29 22:35:41 +00:00
Evan Cheng
b1ba206831 If there is an empty block between a source and its successor block, it still requires a unconditional branch. 
llvm-svn: 37344
 2007-05-29 22:31:16 +00:00
Owen Anderson
83bd7bcf6c Very first part of a GVN-PRE implementation. It currently performs a bunch of analysis, and nothing more. It is also quite slow for the moment. However, 
it should give a sense of what's going on.

llvm-svn: 37343
 2007-05-29 21:53:49 +00:00
Evan Cheng
ff31eed2be Add missing const qualifiers. 
llvm-svn: 37342
 2007-05-29 18:42:18 +00:00
Evan Cheng
d8b25a2091 Add missing const qualifiers. 
llvm-svn: 37341
 2007-05-29 18:35:22 +00:00
Nicolas Geoffray
fff14eecb5 Implementation of compilation callback in PPC ELF32 
llvm-svn: 37340
 2007-05-29 16:33:18 +00:00
Zhou Sheng
3e018c3e3e Correct the logic in LowerPartSet which cleared the bits from 0 to low-1. 
llvm-svn: 37331
 2007-05-26 03:43:13 +00:00
Chris Lattner
5161203d52 tighten up recursion depth again 
llvm-svn: 37330
 2007-05-25 02:19:06 +00:00
Evan Cheng
36164f93fd Silly boog. 
llvm-svn: 37328
 2007-05-25 00:59:01 +00:00
Chris Lattner
8d43dc619d Fix PR1446 by not scalarrepl'ing giant structures. 
llvm-svn: 37326
 2007-05-24 18:43:04 +00:00
Dale Johannesen
86fb3a132a Blocks that cond-br and uncond-br/fallthrough to same block should have 
only one successor.

llvm-svn: 37324
 2007-05-24 18:31:55 +00:00
Dale Johannesen
ecaa8a0fb4 Fix for PR1444: do not create two successors to the same block. 
Temporarily, this breaks CodeGen/Generic/2006-02-12-InsertLibraryCall.ll
by exposing an unrelated latent problem; working on that.

llvm-svn: 37323
 2007-05-24 17:39:32 +00:00
Zhou Sheng
377a4d443b Compute the correct word number. 
llvm-svn: 37322
 2007-05-24 15:03:18 +00:00
Dan Gohman
2c5d31ee81 Minor comment cleanups. 
llvm-svn: 37321
 2007-05-24 14:36:04 +00:00
Dan Gohman
1b1932dda5 Add explicit qualification for namespace MVT members. 
llvm-svn: 37320
 2007-05-24 14:33:05 +00:00
Dan Gohman
a98a5763f9 Add cases for v2f32. 
llvm-svn: 37319
 2007-05-24 14:29:12 +00:00
Evan Cheng
439bf58dc2 Fix a typo that caused combiner to create mal-formed pre-indexed store where value store is the same as the base pointer. 
llvm-svn: 37318
 2007-05-24 02:35:39 +00:00
Dale Johannesen
d0b7bbe261 Two tail merging improvements: 
When considering blocks with more than 2 predecessors, merge the block with
the largest number of matching insns, rather than the first block found.
Considering that 1 matching insn is enough to show a win for candidates that
already end with a branch.

llvm-svn: 37315
 2007-05-23 21:07:20 +00:00
Devang Patel
bf5c49f62c Add dump() routines for debugging assistance. 
llvm-svn: 37314
 2007-05-23 19:55:36 +00:00
Anton Korobeynikov
0f184e86ab Mark all calls as "could throw", when exceptions are enabled. Emit necessary LP info too. This fixes PR1439 
llvm-svn: 37311
 2007-05-23 11:08:31 +00:00
Chris Lattner
d540c6429f prevent exponential recursion in isNegatibleForFree 
llvm-svn: 37310
 2007-05-23 07:35:22 +00:00
Evan Cheng
3f44824179 Preliminary iterative if-conversion support. 
llvm-svn: 37309
 2007-05-23 07:23:16 +00:00
Evan Cheng
80122ab529 Hooks for predication support. 
llvm-svn: 37308
 2007-05-23 07:22:05 +00:00
Evan Cheng
9f763bd3fd Rename a parameter. 
llvm-svn: 37307
 2007-05-23 07:21:11 +00:00
Chris Lattner
d339f51afd when merging two alias sets together, be sure to propagate the volatility of 
the inner set.  This fixes PR1435 and Transforms/LICM/2007-05-22-VolatileSink.ll

llvm-svn: 37305
 2007-05-23 06:36:35 +00:00
Devang Patel
c81283a894 If user wants to run instcombine twice, do not block it. 
llvm-svn: 37301
 2007-05-23 05:08:52 +00:00
Chris Lattner
4cc07421ee fix a miscompilation when passing a float through varargs 
llvm-svn: 37297
 2007-05-23 01:17:04 +00:00
Reid Spencer
c60a73917d Reinstate the patch for escaping non-printing characters and allow for 
\\ to escape \. All these cases are now handled by the AsmParser.

llvm-svn: 37295
 2007-05-22 19:27:35 +00:00
Reid Spencer
b989fcc157 Regenerate. 
llvm-svn: 37294
 2007-05-22 19:08:16 +00:00
Reid Spencer
e7aa6d1247 Don't allow the UnEscape code to read or write beyond the end of yytext. 
Make sure we convert \\ into \.

llvm-svn: 37293
 2007-05-22 19:07:45 +00:00
Reid Spencer
c0e0e864b3 Regenerate. 
llvm-svn: 37292
 2007-05-22 18:52:55 +00:00
Reid Spencer
4c7237fdca Implement full unescaping of escaped hex characters in all quoted identifiers 
and strings.

llvm-svn: 37291
 2007-05-22 18:52:21 +00:00
Dale Johannesen
738f94210c name change requested by review of previous patch 
llvm-svn: 37289
 2007-05-22 18:31:04 +00:00
Owen Anderson
fd5693fcc4 Silence a warning. 
llvm-svn: 37288
 2007-05-22 18:13:40 +00:00
Dale Johannesen
fe0fe14411 Make tail merging the default, except on powerPC. There was no prior art 
for a target-dependent default with a command-line override; this way
should be generally usable.

llvm-svn: 37285
 2007-05-22 17:14:46 +00:00
Chris Lattner
1509e17e6c temporarily revert reid's asmwriter patch, it is missing the asmparser piece 
that decodes the escape sequences, thus breaking all cases that use them.

This fixes test/Assembler/2007-05-21-Escape.ll

llvm-svn: 37284
 2007-05-22 07:00:50 +00:00
Chris Lattner
d645a38841 update comment 
llvm-svn: 37282
 2007-05-22 06:56:32 +00:00
Chris Lattner
87cf325aad regenerate 
llvm-svn: 37281
 2007-05-22 06:47:55 +00:00
Chris Lattner
27741f22d9 simplify code 
llvm-svn: 37280
 2007-05-22 06:47:11 +00:00
Bill Wendling
26eb9fb1e0 We only need to specify the most-implied feature for an architecture. 
llvm-svn: 37275
 2007-05-22 05:15:37 +00:00
Evan Cheng
f448047ec2 Fix some -march=thumb regressions. tBR_JTr is not predicable. 
llvm-svn: 37272
 2007-05-21 23:17:32 +00:00
Dale Johannesen
f01566b705 Use AXI3 not AXI2 for appropriate PIC PC-relative loads and stores. Cosmetic. 
llvm-svn: 37271
 2007-05-21 22:42:04 +00:00
Evan Cheng
d395b14837 If-convert early exit blocks (returns, etc.); bug fixes, etc. 
llvm-svn: 37270
 2007-05-21 22:22:58 +00:00
Dale Johannesen
8f484d16b0 Add some patterns for PIC PC-relative loads and stores. 
llvm-svn: 37269
 2007-05-21 22:14:33 +00:00
Evan Cheng
d173398eee BlockHasNoFallThrough() now returns true if block ends with a return instruction; AnalyzeBranch() should ignore predicated instructionsd. 
llvm-svn: 37268
 2007-05-21 18:56:31 +00:00
Duncan Sands
05d340bbd1 Only emit one entry in the exception action table for each action, even if 
it occurs for multiple landing pads.

llvm-svn: 37267
 2007-05-21 18:50:28 +00:00
Evan Cheng
3f386274c0 BlockHasNoFallThrough() now returns true if block ends with a return instruction. 
llvm-svn: 37266
 2007-05-21 18:44:17 +00:00
Reid Spencer
dbc381aedd Get the order of the hext digits right! 
llvm-svn: 37261
 2007-05-19 14:44:42 +00:00
Reid Spencer
7170d7ab1b Adjust how LLVM names are produced: 
1. Always use % for local and @ for global.
2. Replace NameNeedsQuotes with QuoteNameIfNeeded so that any adjustments
   to the name can be done in one pass.
3. Implement generation of hex escapes so we don't get "wonky" characters
   in the output.

llvm-svn: 37260
 2007-05-19 07:25:21 +00:00
Reid Spencer
b95962309d Regenerate 
llvm-svn: 37258
 2007-05-19 07:22:10 +00:00
Reid Spencer
b3bb24667a Make the %"..." syntax legal for local name. This just makes it symmetric 
with global names which can already be @"..."

llvm-svn: 37257
 2007-05-19 07:21:26 +00:00
Chris Lattner
dda5066a5e Fix Transforms/InstCombine/2007-05-18-CastFoldBug.ll, a bug that devastates 
objc code due to the way the FE lowers objc message sends.

llvm-svn: 37256
 2007-05-19 06:51:32 +00:00
Reid Spencer
2fc9ebc62a On Linux platforms and at optimization levels -O1 and above, llvm-gcc can 
turn "putchar" calls into _IO_putc calls which is a lower-level interface.
This patch allows these calls to be executed by lli in interpreter mode.

llvm-svn: 37254
 2007-05-19 01:36:17 +00:00
Chris Lattner
a13d75f270 Handle negative strides much more optimally. This compiles X86/lsr-negative-stride.ll 
into:

_t:
        movl 8(%esp), %ecx
        movl 4(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_3       #bb17
LBB1_1: #bb
        cmpl %ecx, %eax
        jg LBB1_4       #cond_true
LBB1_2: #cond_false
        subl %eax, %ecx
        cmpl %ecx, %eax
        jne LBB1_1      #bb
LBB1_3: #bb17
        ret
LBB1_4: #cond_true
        subl %ecx, %eax
        cmpl %ecx, %eax
        jne LBB1_1      #bb
        jmp LBB1_3      #bb17

instead of:

_t:
        subl $4, %esp
        movl %esi, (%esp)
        movl 12(%esp), %ecx
        movl 8(%esp), %eax
        cmpl %ecx, %eax
        je LBB1_4       #bb17
LBB1_1: #bb.outer
        movl %ecx, %edx
        negl %edx
LBB1_2: #bb
        cmpl %ecx, %eax
        jle LBB1_5      #cond_false
LBB1_3: #cond_true
        addl %edx, %eax
        cmpl %ecx, %eax
        jne LBB1_2      #bb
LBB1_4: #bb17
        movl (%esp), %esi
        addl $4, %esp
        ret
LBB1_5: #cond_false
        movl %ecx, %edx
        subl %eax, %edx
        movl %eax, %esi
        addl %esi, %esi
        cmpl %ecx, %esi
        je LBB1_4       #bb17
LBB1_6: #cond_false.bb.outer_crit_edge
        movl %edx, %ecx
        jmp LBB1_1      #bb.outer

llvm-svn: 37252
 2007-05-19 01:22:21 +00:00
Chris Lattner
27b469b945 same patch as the previous one, but the symmetric case 
llvm-svn: 37249
 2007-05-19 00:46:51 +00:00
Chris Lattner
2430b7c4aa Disable the (A == (B-A)) -> 2*A == B xform when the sub has multiple uses (in 
this case, the xform introduces an extra operation).  This compiles
PowerPC/compare-duplicate.ll into:

_test:
        subf r2, r3, r4
        cmplw cr0, r2, r3
        bne cr0, LBB1_2 ;F

instead of:

_test:
        slwi r2, r3, 1
        subf r3, r3, r4
        cmplw cr0, r4, r2
        bne cr0, LBB1_2 ;F

This is target independent of course.

llvm-svn: 37246
 2007-05-19 00:43:44 +00:00
Reid Spencer
fe3c213178 Fix an assertion introduced by my last change to the toString method. We 
can't use getZExtValue() to extract the low order bits for each digit.
Instead, we need to access the low order word directly.

llvm-svn: 37242
 2007-05-19 00:29:55 +00:00
Dan Gohman
875f6bde73 Apply this patch: 
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070514/049845.html

llvm-svn: 37240
 2007-05-18 23:21:46 +00:00
Chris Lattner
a7834d79a0 add a note 
llvm-svn: 37239
 2007-05-18 20:18:14 +00:00
Evan Cheng
ca7bc898aa Clean up. 
llvm-svn: 37237
 2007-05-18 19:32:08 +00:00
Evan Cheng
ad9ce3c5b2 Change to depth-first traversal. 
llvm-svn: 37236
 2007-05-18 19:26:33 +00:00
Dale Johannesen
09b2912ab7 Document an inefficiency in tail merging. 
llvm-svn: 37235
 2007-05-18 18:46:40 +00:00
Dan Gohman
ec87afe526 Use MVT::FIRST_VECTOR_VALUETYPE and MVT::LAST_VECTOR_VALUETYPE. 
llvm-svn: 37234
 2007-05-18 18:44:07 +00:00
Dan Gohman
b593ad9fb0 Qualify calls to getTypeForValueType with MVT:: too. 
llvm-svn: 37233
 2007-05-18 18:41:29 +00:00
Evan Cheng
1ed1741260 Some restructuring in preparation for most aggressive if-conversion. 
llvm-svn: 37231
 2007-05-18 18:14:37 +00:00
Dan Gohman
d6a33914fb Qualify several calls to functions in the MVT namespace, for consistency. 
llvm-svn: 37230
 2007-05-18 17:52:13 +00:00
Evan Cheng
234f07808b Watch out for blocks that end with a return. 
llvm-svn: 37227
 2007-05-18 17:06:53 +00:00
Chris Lattner
c63d04ecce Fix PR1434 and test/Linker/link-archive.ll, this is a regression from 1.9. 
llvm-svn: 37204
 2007-05-18 04:02:46 +00:00
Evan Cheng
40eecb3d06 If true / false blocks fallthrough before ifcvt, add unconditional branches to ifcvt'd block. 
llvm-svn: 37200
 2007-05-18 01:55:58 +00:00
Evan Cheng
e875732104 Mark calls non-predicable for now. Need to ensure it's the last instruction in the if-converted block or make sure it preserve condition code. 
llvm-svn: 37199
 2007-05-18 01:53:54 +00:00
Dale Johannesen
ca37006ffb Remove some unneeded branches. (spotted by Evan, thanks) 
llvm-svn: 37198
 2007-05-18 01:28:58 +00:00
Evan Cheng
03349b0344 Silence some compilation warnings. 
llvm-svn: 37197
 2007-05-18 01:19:57 +00:00
Evan Cheng
c6aa69557a Make use of target specific block size limits; bug fixes. 
llvm-svn: 37195
 2007-05-18 00:20:58 +00:00
Evan Cheng
2fc338fac1 Set ARM if-conversion block size threshold to 10 instructions for now. 
llvm-svn: 37194
 2007-05-18 00:19:34 +00:00
Evan Cheng
90b0ff05f6 RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted. 
llvm-svn: 37193
 2007-05-18 00:18:17 +00:00
Evan Cheng
234aab208a RemoveBranch() and InsertBranch() now returns number of instructions deleted / inserted. 
llvm-svn: 37192
 2007-05-18 00:05:48 +00:00
Evan Cheng
b4cc6606d5 Move isSuccessor() offline, change it to use std::find. 
llvm-svn: 37190
 2007-05-17 23:58:53 +00:00
Devang Patel
6e8f1aa332 Fix PR1431 
Test case at Transformations/SCCP/2007-05-16-InvokeCrash.ll

llvm-svn: 37185
 2007-05-17 22:10:15 +00:00
Dale Johannesen
f66c6b85f1 More effective breakdown of memcpy into repeated load/store. These are now 
in the order lod;lod;lod;sto;sto;sto which means the load-store optimizer
has a better chance of producing ldm/stm.  Ideally you would get cooperation
from the RA as well but this is not there yet.

llvm-svn: 37179
 2007-05-17 21:31:21 +00:00
Reid Spencer
fe3fc94a44 Get rid of leading zeros in the output of toString. 
llvm-svn: 37175
 2007-05-17 19:23:02 +00:00
Evan Cheng
1b4af5f975 Fix a bogus check that prevented folding VECTOR_SHUFFLE to UNDEF; add an optimization to fold VECTOR_SHUFFLE to a zero vector. 
llvm-svn: 37173
 2007-05-17 18:45:50 +00:00
Evan Cheng
9c4e69e6e5 Added missing patterns for UNPCKH* and PUNPCKH*. 
llvm-svn: 37172
 2007-05-17 18:44:37 +00:00
Chris Lattner
910abfbfd1 disable MaskedValueIsZero, ComputeMaskedBits, and SimplifyDemandedBits for 
i128 integers.  The 64-bit masks are not wide enough to represent the results.
These should be converted to APInt someday.

llvm-svn: 37169
 2007-05-17 18:19:23 +00:00
Chris Lattner
d441344214 add expand support for ADDC/SUBC/ADDE/SUBE so we can codegen 128-bit add/sub on 32-bit (or less) targets 
llvm-svn: 37168
 2007-05-17 18:15:41 +00:00
Chris Lattner
9a53871650 This is the correct fix for PR1427. This fixes mmx-shuffle.ll and doesn't 
cause other regressions.

llvm-svn: 37160
 2007-05-17 17:13:13 +00:00
Anton Korobeynikov
375cafc275 Revert patch for PR1427. It breaks almost all vector tests. 
llvm-svn: 37159
 2007-05-17 07:50:14 +00:00
Chris Lattner
a18b7d76b3 add support for 128-bit add/sub on ppc64 
llvm-svn: 37158
 2007-05-17 06:52:46 +00:00
Reid Spencer
e22c276c5c Print integer values as both decimal and hexadecimal for convenience 
of verifying result values when debugging.

llvm-svn: 37156
 2007-05-17 06:47:54 +00:00
Chris Lattner
307a29e831 add support for 128-bit integer add/sub 
llvm-svn: 37154
 2007-05-17 06:35:11 +00:00
Reid Spencer
39e03f53ca For lshr by 0 bits, just return *this as a short cut. This also prevents 
undefined behavior when the width > 64 bits.

llvm-svn: 37153
 2007-05-17 06:26:29 +00:00
Chris Lattner
f65fe1d931 Fix PR1427 and test/CodeGen/X86/mmx-shuffle.ll 
llvm-svn: 37141
 2007-05-17 03:29:42 +00:00
Evan Cheng
dc9e574073 Remove. Not needed. 
llvm-svn: 37139
 2007-05-17 00:11:35 +00:00
Evan Cheng
4fa2db30d9 Default implementation of TargetInstrInfo::getBlockSize(). 
llvm-svn: 37138
 2007-05-16 23:53:44 +00:00
Evan Cheng
3163b77d5e Add target hook to specify block size limit for if-conversion. 
llvm-svn: 37134
 2007-05-16 23:45:53 +00:00
Dale Johannesen
cc99a6fc32 Don't fold bitconvert(load) for preinc/postdec loads. Likewise stores. 
llvm-svn: 37130
 2007-05-16 22:45:30 +00:00
Evan Cheng
ab88e91c81 isBlockPredicable() always ignore terminal instructions; add comments. 
llvm-svn: 37126
 2007-05-16 21:54:37 +00:00
Evan Cheng
b09bf9914f ARM::tB is also predicable. 
llvm-svn: 37125
 2007-05-16 21:53:43 +00:00
Evan Cheng
973f4a19cb PredicateInstruction returns true if the operation was successful. 
llvm-svn: 37124
 2007-05-16 21:53:07 +00:00
Evan Cheng
30f3168b7b Add default implementation of PredicateInstruction(). 
llvm-svn: 37123
 2007-05-16 21:20:37 +00:00
Evan Cheng
6f761adecb Rename M_PREDICATED to M_PREDICABLE; Moved isPredicable() to MachineInstr. 
llvm-svn: 37121
 2007-05-16 20:56:08 +00:00
Evan Cheng
48f230dcb0 Move if-conversion after all passes that may use register scavenger. 
llvm-svn: 37120
 2007-05-16 20:52:46 +00:00
Evan Cheng
f7a017dfa7 Removed isPredicable(). 
llvm-svn: 37119
 2007-05-16 20:50:23 +00:00
Evan Cheng
d3f1a259db Make ARM::B isPredicable; Make Bcc and MOVCC condition option a normal operand so they are not predicable. 
llvm-svn: 37118
 2007-05-16 20:50:01 +00:00
Evan Cheng
0aced52f41 Added isPredicable bit to class Instruction. 
llvm-svn: 37117
 2007-05-16 20:47:01 +00:00
Reid Spencer
1ec1e07949 Fix a bug in the "fromString" method where radix 2,8 and 16 values were 
not being generated correctly because the shl operator does not mutate its
object but returns a new value. Also, make the distinction between radix
16 and the others more clear.

llvm-svn: 37111
 2007-05-16 19:18:22 +00:00
Reid Spencer
a89e097aa2 Avoid a "loss of precision" error in gcc 4.1.3. 
llvm-svn: 37105
 2007-05-16 16:39:29 +00:00
Duncan Sands
3296999dbb Output exception call-sites in address order, as required by the unwinding 
runtime.

llvm-svn: 37104
 2007-05-16 12:12:23 +00:00
Evan Cheng
6943cefdcd Conditional branch is not a barrier. 
llvm-svn: 37103
 2007-05-16 07:45:54 +00:00
Chris Lattner
a18b36cf45 Use a ptr set instead of a linear search to unique TokenFactor operands. 
This fixes PR1423

llvm-svn: 37102
 2007-05-16 06:37:59 +00:00
Chris Lattner
e67947b38f implement the missing maskmovq mmx intrinsic that akor hit. 
llvm-svn: 37100
 2007-05-16 06:08:17 +00:00
Evan Cheng
c149ee9f00 Fix comment. 
llvm-svn: 37098
 2007-05-16 05:14:06 +00:00
Evan Cheng
3fb34a4fdd Devang points out that we need an assertion here. 
llvm-svn: 37097
 2007-05-16 05:11:10 +00:00
Reid Spencer
3c3aa55322 Implement printing of instruction result values when debug info is turned 
on. This helps to speed up the debugging time by showing computational
results as the program executes.

llvm-svn: 37095
 2007-05-16 02:05:13 +00:00
Evan Cheng
a781c7788a Bug fix: should check ABI alignment, not pref. alignment. 
llvm-svn: 37094
 2007-05-16 02:04:50 +00:00
Evan Cheng
34928ae31f Hooks for predication support. 
llvm-svn: 37093
 2007-05-16 02:01:49 +00:00
Evan Cheng
aafca4d4a2 Initial commit of (very basic) if converter. 
llvm-svn: 37092
 2007-05-16 02:00:57 +00:00
Dale Johannesen
78ae2e1acb Remove extra CFG edges before doing these passes; it makes them happier. 
llvm-svn: 37089
 2007-05-15 21:19:17 +00:00
Lauro Ramos Venancio
251ea5ab65 Fix an infinite recursion in GetNegatedExpression. 
llvm-svn: 37086
 2007-05-15 17:05:43 +00:00
Duncan Sands
eddbb07561 The index into the actions table is a ULEB128 not a SLEB128. 
llvm-svn: 37084
 2007-05-15 13:54:14 +00:00
Chris Lattner
701ec7ae28 selects can also reach here 
llvm-svn: 37081
 2007-05-15 06:42:04 +00:00
Chris Lattner
272d600454 implement the ModuleProvider::dematerializeFunction hook 
llvm-svn: 37080
 2007-05-15 06:29:44 +00:00
Reid Spencer
b1ac506546 Un-brain-dead-ify the lowering of part set for the reverse case. 
llvm-svn: 37071
 2007-05-15 02:26:52 +00:00
Chris Lattner
ba648e0d45 Fix some subtle issues handling immediate values. This fixes 
test/CodeGen/ARM/2007-05-14-InlineAsmCstCrash.ll

llvm-svn: 37069
 2007-05-15 01:33:58 +00:00
Chris Lattner
4861b958f1 fix some subtle inline asm selection issues 
llvm-svn: 37067
 2007-05-15 01:31:05 +00:00
Evan Cheng
9f0ffdf4b3 Add PredicateOperand to all ARM instructions that have the condition field. 
llvm-svn: 37066
 2007-05-15 01:29:07 +00:00
Chris Lattner
ce20a357f1 fix subtle bugs in inline asm operand selection 
llvm-svn: 37065
 2007-05-15 01:28:08 +00:00
Evan Cheng
eea85a767e Added getNumExplicitOperands and findFirstPredOperand. 
llvm-svn: 37064
 2007-05-15 01:26:09 +00:00
Chris Lattner
dfc6f4a06c Fix Transforms/InstCombine/2007-05-14-Crash.ll 
llvm-svn: 37057
 2007-05-15 00:16:00 +00:00
Lauro Ramos Venancio
c9c5da3939 Fix previous patch. GOTOFF can be used only when the symbol has internal 
linkage or hidden visibility.

llvm-svn: 37055
 2007-05-14 23:20:21 +00:00
Chris Lattner
eba1b74df3 implement a simple fneg optimization/propagation thing. This compiles: 
CodeGen/PowerPC/fneg.ll into:

_t4:
        fmul f0, f3, f4
        fmadd f1, f1, f2, f0
        blr

instead of:

_t4:
        fneg f0, f3
        fmul f0, f0, f4
        fmsub f1, f1, f2, f0
        blr

llvm-svn: 37054
 2007-05-14 22:04:50 +00:00
Evan Cheng
9645be8cf5 Only worry about intervening kill if there are more than one live ranges in the interval. 
llvm-svn: 37052
 2007-05-14 21:23:51 +00:00
Evan Cheng
e9e48bcf28 Fix for PR1406: 
v1 =
r2 = move v1
   = op r2<kill>
...
r2 = move v1
   = op r2<kill>

Clear the first r2 kill if v1 and r2 are joined.

llvm-svn: 37050
 2007-05-14 21:10:05 +00:00
Evan Cheng
bb876d7323 When marking a register as being implicitly defined, make sure to clear its partial use info as well. 
llvm-svn: 37046
 2007-05-14 20:39:18 +00:00
Lauro Ramos Venancio
3ff817509f Optimize PIC implementation. GOTOFF can be used when the symbol is defined 
and used in the same module.

llvm-svn: 37044
 2007-05-14 18:46:23 +00:00
Lauro Ramos Venancio
c6d71fb584 Enable aliases on arm-linux. 
llvm-svn: 37042
 2007-05-14 18:32:56 +00:00
Reid Spencer
afe2314bb0 Give names to the final result values of the part_set computations. This 
just aids in readability and debugability of the output. No functional change.

llvm-svn: 37037
 2007-05-14 17:21:17 +00:00
Dan Gohman
7616b6f30c Correct a few comments. 
llvm-svn: 37034
 2007-05-14 14:31:17 +00:00
Dan Gohman
f704d8f166 Add passes -view-cfg and -view-cfg-only that are like -print-cfg and 
-print-cfg-only except they use the ViewCFG function, which displays the
CFG rendered with graphviz with gv.

llvm-svn: 37033
 2007-05-14 14:25:08 +00:00
Reid Spencer
3dab764309 Make the results for the rotate functions correct when rotateAmt == 0. 
llvm-svn: 37026
 2007-05-14 00:15:28 +00:00
Reid Spencer
a17d02ad08 Add some things needed by the llvm-gcc version supporting bit accurate integer 
types:
1. Functions to compute div/rem at the same time.
2. Further assurance that an APInt with 0 bitwidth cannot be constructed.
3. Left and right rotate operations.
4. An exactLogBase2 function which requires an exact power of two or it
   returns -1.

llvm-svn: 37025
 2007-05-13 23:44:59 +00:00
Chris Lattner
ecc23415ad Fix PR1413 
llvm-svn: 37023
 2007-05-13 22:19:27 +00:00
Chris Lattner
8ed56b8c48 Fix Transforms/GlobalOpt/2007-05-13-Crash.ll 
llvm-svn: 37020
 2007-05-13 21:28:07 +00:00
Anton Korobeynikov
ad0dd14386 Emit function debug frames in one atom. This will prevent us from generating incorrect assembler in case of both 
debug information & exception information presented.

llvm-svn: 37019
 2007-05-13 17:30:11 +00:00
Anton Korobeynikov
100919126f Emit multiple common EH frames for multiple (including blank) personality 
functions. This partly fixes PR1414: now we're restricted only to one
personality function per eh frame, not per module. Further work on
"multiple personalities" topic needs representative example.

llvm-svn: 37018
 2007-05-13 15:42:26 +00:00
Anton Korobeynikov
7daaf71b29 More DWARF-related things cleanup: 
1. Fix PR1380
2. Apply Duncan's patch from PR1410
3. Insert workaround for "one personality function per module" as noted in PR1414
4. Emit correct debug frames for x86/linux. This partly fixes DebugInfo/2006-11-06-StackTrace.cpp: stack trace is
shown correctly, but arguments for function on top of stack are displayed incorrectly.

llvm-svn: 37015
 2007-05-12 22:36:25 +00:00
Reid Spencer
8c2e0f85eb Fix shl to produce the correct result when the bitwidth is > 64 and the 
shift amount is 0. Previously this code would do a lshr by the bit width
which can lead to incorrect results.

llvm-svn: 37010
 2007-05-12 18:01:57 +00:00
Reid Spencer
e7a70b7212 Get the size of auto arrays right, regardless of its changing size. 
llvm-svn: 37006
 2007-05-12 11:07:40 +00:00
Chris Lattner
fe54b2a495 allow partially materialized modules to be written out, which just strips out 
the functions which haven't been read.

llvm-svn: 36999
 2007-05-11 23:51:59 +00:00
Devang Patel
c611adb5b7 Fix http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049516.html 
llvm-svn: 36998
 2007-05-11 23:14:43 +00:00
Chris Lattner
119ece07be significantly improve debug output of lsr 
llvm-svn: 36996
 2007-05-11 22:40:34 +00:00
Dan Gohman
03114bee5f Update comments to say "vector" instead of "packed". 
llvm-svn: 36995
 2007-05-11 21:43:24 +00:00
Dan Gohman
167379e73a Fix typos. 
llvm-svn: 36994
 2007-05-11 21:10:54 +00:00
Dan Gohman
2e4ac0dea5 This patch extends the LoopUnroll pass to be able to unroll loops 
with unknown trip counts. This is left off by default, and a
command-line option enables it. It also begins to separate loop
unrolling into a utility routine; eventually it might be made usable
from other passes.

It currently works by inserting conditional branches between each
unrolled iteration, unless it proves that the trip count is a
multiple of a constant integer > 1, which it currently only does in
the rare case that the trip count expression is a Mul operator with
a ConstantInt operand. Eventually this information might be provided
by other sources, for example by a pass that peels/splits the loop
for this purpose.

llvm-svn: 36990
 2007-05-11 20:53:41 +00:00
Chris Lattner
3936efb43b fix regressions from my previous checking, including 
Transforms/InstCombine/2006-12-08-ICmp-Combining.ll

llvm-svn: 36989
 2007-05-11 16:58:45 +00:00
Anton Korobeynikov
5754e67b1a Perform correct actions numbers/sizes computation 
llvm-svn: 36988
 2007-05-11 08:47:35 +00:00
Anton Korobeynikov
2d2a44b71f Fix action No calculation in multiple-invoke-one-LP mode 
llvm-svn: 36987
 2007-05-11 08:23:57 +00:00
Chris Lattner
f7adc33cbd fix Transforms/InstCombine/2007-05-10-icmp-or.ll 
llvm-svn: 36984
 2007-05-11 05:55:56 +00:00
Chris Lattner
b601311b07 fix a memory leak 
llvm-svn: 36981
 2007-05-11 00:43:26 +00:00
Chris Lattner
044aaca356 Fix a bug where the bcreader could crash on .bc files that were an exact 
multiple of the page size, due to a bug in MappedFile

llvm-svn: 36980
 2007-05-11 00:00:27 +00:00
Dale Johannesen
2f28ffc5fd Do not generate branches to entry block. This fixes several test suite 
failures on PPC (can happen only when prologue code is null)

llvm-svn: 36979
 2007-05-10 23:59:23 +00:00
Anton Korobeynikov
5ba99a95e8 Ooops. Some debugging stuff :) 
llvm-svn: 36978
 2007-05-10 22:38:46 +00:00
Anton Korobeynikov
0a29b65e0c Allow multiple invokes per landing pad. This (probably) fixes PR1410. 
llvm-svn: 36977
 2007-05-10 22:34:59 +00:00
Duncan Sands
828ef09f10 Later computations assume we are aligned at this point. 
llvm-svn: 36975
 2007-05-10 18:40:24 +00:00
Anton Korobeynikov
a25bb3a0ff TypeIds are indexed by j, not i 
llvm-svn: 36974
 2007-05-10 15:10:34 +00:00
Dale Johannesen
4f9661688c Make tail merging handle many more cases (all it can, I think). 
llvm-svn: 36966
 2007-05-10 01:01:49 +00:00
Chris Lattner
96e9e88590 add some notes 
llvm-svn: 36965
 2007-05-10 00:08:04 +00:00
Evan Cheng
649f25dad1 Can't fold the bit_convert is the store is a truncating store. 
llvm-svn: 36962
 2007-05-09 21:49:47 +00:00
Anton Korobeynikov
4423f1a3fd Do not assert, when case range split metric is zero and JTs are not allowed: just emit binary tree in this case. This 
fixes PR1403.

llvm-svn: 36959
 2007-05-09 20:07:08 +00:00
Devang Patel
1f12d0b50c Fix PR1333 
Testcases :
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049451.html
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20070507/049452.html

llvm-svn: 36955
 2007-05-09 08:24:12 +00:00
Evan Cheng
73abcaa525 Switch BCC, MOVCCr, etc. to PredicateOperand. 
llvm-svn: 36948
 2007-05-08 21:08:43 +00:00
Evan Cheng
4dd52e052f PredicateOperand can be used as a normal operand for isel. 
llvm-svn: 36947
 2007-05-08 21:06:08 +00:00
Bill Wendling
a5f8cb0805 Change names from RA to something unique to get rid of naming conflicts with 
certain linkers...

llvm-svn: 36944
 2007-05-08 19:02:46 +00:00
Evan Cheng
855b26b72e Eliminate MarkVirtRegAliveInBlock recursion. 
llvm-svn: 36943
 2007-05-08 19:00:00 +00:00
Evan Cheng
6a0b99b9f8 R0 is a sub-register of X0, etc. 
llvm-svn: 36939
 2007-05-08 17:03:51 +00:00
Dan Gohman
7459c19c81 Fix various whitespace inconsistencies. 
llvm-svn: 36936
 2007-05-08 15:19:19 +00:00
Dan Gohman
e9789171b0 Correct the comment for ApproximateLoopSize to reflect what it actually does. 
llvm-svn: 36935
 2007-05-08 15:14:19 +00:00
Chris Lattner
062b15b7cc Make a preemptive bitcode format change to support PR1146. This lets us do 
pr1146 in llvm 2.1 without ugly code to emulate old behavior.  This should
be merged into the 2.0 release branch.

llvm-svn: 36928
 2007-05-08 05:38:01 +00:00
Dale Johannesen
842aef302e Don't generate branch to entry block. 
llvm-svn: 36917
 2007-05-08 01:01:04 +00:00
Lauro Ramos Venancio
4f648c68cd Fix PR1390 in a better way. 
llvm-svn: 36916
 2007-05-07 23:15:16 +00:00
Evan Cheng
e18b87868d Forgot a check. 
llvm-svn: 36910
 2007-05-07 21:36:06 +00:00
Evan Cheng
a949d165ee This is no longer needed after enabling the DAG combiner xform. 
llvm-svn: 36909
 2007-05-07 21:29:41 +00:00
Evan Cheng
18d994d6d6 Enable a couple of xforms: 
- (store (bitconvert v)) -> (store v) if resultant store does not require
higher alignment
- (bitconvert (load v)) -> (load (bitconvert*)v) if resultant load does not
require higher alignment

llvm-svn: 36908
 2007-05-07 21:27:48 +00:00
Dale Johannesen
c884abe112 Handle some non-exit blocks in tail merging. 
llvm-svn: 36907
 2007-05-07 20:57:21 +00:00
Duncan Sands
20a9ed0e20 Parameter attributes on invoke calls were being lost due to the wrong 
attribute index being used.  Fix proposed by Anton Korobeynikov, who
asked me to implement and commit it for him.  This is PR1398.

llvm-svn: 36906
 2007-05-07 20:49:28 +00:00
Jeff Cohen
2e8263c013 Unbreak VC++ build. 
llvm-svn: 36901
 2007-05-07 15:21:46 +00:00
Chris Lattner
112d26a164 Enhance MemoryBuffer to return error messages in strings if they occur. 
llvm-svn: 36899
 2007-05-06 23:32:36 +00:00
Chris Lattner
8e9063c571 Fix PR1395, by passing the ID correctly 
llvm-svn: 36894
 2007-05-06 23:13:56 +00:00
Chris Lattner
50214d1447 add this back 
llvm-svn: 36892
 2007-05-06 20:31:17 +00:00
Anton Korobeynikov
3765489a61 Detabify 
llvm-svn: 36891
 2007-05-06 20:14:21 +00:00
Anton Korobeynikov
dda2087b65 Update MSIL BE. This patch fixes most weird glitches outlined in 
README.txt. Patch by Roman Samoilov!

llvm-svn: 36890
 2007-05-06 20:13:33 +00:00
Chris Lattner
c38f488a16 lib/Bytecode is dead 
llvm-svn: 36889
 2007-05-06 19:51:20 +00:00
Chris Lattner
540930c18f move this to lib/Archive 
llvm-svn: 36888
 2007-05-06 19:50:53 +00:00
Chris Lattner
d44d4aa93f build lib/Archive instead of lib/Bytecode 
llvm-svn: 36887
 2007-05-06 19:50:06 +00:00
Chris Lattner
5fc47d5385 adjust this to live in lib/Archive 
llvm-svn: 36886
 2007-05-06 19:49:28 +00:00
Chris Lattner
37e8034ef8 remove bytecode reader 
llvm-svn: 36882
 2007-05-06 19:42:57 +00:00
Chris Lattner
a5a46fd5f3 remove the old bc writer 
llvm-svn: 36881
 2007-05-06 19:33:40 +00:00
Chris Lattner
6056636de8 fix off-by-one that caused the llvm2cpp test to fail 
llvm-svn: 36880
 2007-05-06 19:27:46 +00:00
Chris Lattner
dc7a11940e Flush the file after writing bitcode so that clients who don't close their 
ofstreams will be ok.

llvm-svn: 36878
 2007-05-06 19:19:23 +00:00
Chris Lattner
4dca43cc6d remove this file for now, we can bring it back from cvs if we need it in 
the future (and integrate it with membuffer, etc)

llvm-svn: 36876
 2007-05-06 19:10:47 +00:00
Chris Lattner
71eb8d5e89 remove libbzip2, it is dead 
llvm-svn: 36875
 2007-05-06 19:05:34 +00:00
Nick Lewycky
c2306ff5b4 Fix typo in comment. 
llvm-svn: 36873
 2007-05-06 13:37:16 +00:00
Chris Lattner
5bd1b5b32d don't build bzip2 for now 
llvm-svn: 36871
 2007-05-06 09:31:32 +00:00
Chris Lattner
5f94a8492f disable this for now 
llvm-svn: 36870
 2007-05-06 09:31:06 +00:00
Chris Lattner
f9a6121339 don't build bcreader/bcwriter 
llvm-svn: 36869
 2007-05-06 09:30:31 +00:00
Chris Lattner
c684dbdb6b switch this to bitcode instead of bytecode 
llvm-svn: 36867
 2007-05-06 09:29:13 +00:00
Chris Lattner
da078a7c60 Switch this over to bitcode instead of bytecode. 
llvm-svn: 36866
 2007-05-06 09:28:33 +00:00
Chris Lattner
af0a11cd65 Fix a nasty problem where we would miss enumeration of some types. This fixes 
issues with CE_CAST etc.

llvm-svn: 36864
 2007-05-06 08:35:19 +00:00
Chris Lattner
0c204417b2 Allow structs with zero fields. 
llvm-svn: 36862
 2007-05-06 08:21:50 +00:00
Bill Wendling
88e78f8bdb 3DNowA implies 3DNow. 64-bit implies SSE1, SSE2, and I assume MMX. 
llvm-svn: 36860
 2007-05-06 07:56:19 +00:00
Chris Lattner
8b0bda0104 add a missing check 
llvm-svn: 36859
 2007-05-06 07:33:01 +00:00
Chris Lattner
9fa29b4027 Fix MemoryBuffer::getFile to return null if it has an error opening the 
file instead of aborting.

llvm-svn: 36858
 2007-05-06 07:24:46 +00:00
Chris Lattner
619ffa3881 Fix a bug in my previous patch 
llvm-svn: 36857
 2007-05-06 07:24:03 +00:00
Chris Lattner
38eeedc621 add bitcode support 
llvm-svn: 36856
 2007-05-06 06:18:07 +00:00
Chris Lattner
c0fa93d591 add bitcode support 
llvm-svn: 36855
 2007-05-06 06:02:13 +00:00
Chris Lattner
342010d9f3 pull some win32 code into common code, add bitcode identification support. 
llvm-svn: 36846
 2007-05-06 05:32:21 +00:00
Chris Lattner
8394ded8eb teach this to read from bitcode files 
llvm-svn: 36843
 2007-05-06 05:18:53 +00:00
Nate Begeman
f496eb7607 Reference correct header 
llvm-svn: 36834
 2007-05-06 04:00:55 +00:00
Jeff Cohen
64156becaa Keep header file free of 'possible loss of data' warnings. 
llvm-svn: 36832
 2007-05-06 03:23:14 +00:00
Jeff Cohen
ce844b2aaa Unbreak VC++. 
llvm-svn: 36831
 2007-05-06 03:12:47 +00:00
Chris Lattner
ad8aadac37 add abbrevs for binops and casts. This shrinks a testcase from 725132->682500 
bytes.

llvm-svn: 36829
 2007-05-06 02:38:57 +00:00
Chris Lattner
bf23240f44 add a new CreateBitcodeWriterPass method, which creates a bitcode writer as 
a pass

llvm-svn: 36828
 2007-05-06 02:30:12 +00:00
Chris Lattner
7eb319ab65 implement reading/writing of inlineasm objects 
llvm-svn: 36827
 2007-05-06 01:58:20 +00:00
Chris Lattner
0505a9f632 add some abbrevs for ret and unreachable, shrinking kc++ from 2717360->2705388 
llvm-svn: 36823
 2007-05-06 01:28:01 +00:00
Chris Lattner
50460e7c48 enumerate the operands of a constant before we enumerate the constant itself 
This avoids fwd references in the reader.

llvm-svn: 36822
 2007-05-06 01:00:28 +00:00
Chris Lattner
6d0c5eb739 add a denser encoding for null terminated strings, add a 6-bit abbrev as 
well.  This shrinks kc++ from 2724088 to 2717360 bytes.

llvm-svn: 36821
 2007-05-06 00:53:07 +00:00
Chris Lattner
63002bb235 add an abbreviation for the string constants opzn, shrinking the constnats 
block from:

  Block ID #11 (CONSTANTS_BLOCK):
      Num Instances: 1722
         Total Size: 3.85976e+06b/482470B/120617W
          % of file: 16.7609
       Average Size: 2241.44b/280.18B/70.045W
  Tot/Avg SubBlocks: 0/0
    Tot/Avg Abbrevs: 1/0.00058072
    Tot/Avg Records: 26423/15.3444
      % Abbrev Recs: 69.1746

to:

 Block ID #11 (CONSTANTS_BLOCK):
      Num Instances: 1724
         Total Size: 2.62406e+06b/328008B/82001.9W
          % of file: 12.041
       Average Size: 1522.08b/190.26B/47.5649W
  Tot/Avg SubBlocks: 0/0
    Tot/Avg Abbrevs: 2/0.00116009
    Tot/Avg Records: 26280/15.2436
      % Abbrev Recs: 68.9992

This shrinks kc++ from 2815788 to 2724088 bytes, which means the bitcode
file is now smaller than the bytecode file.

llvm-svn: 36820
 2007-05-06 00:42:18 +00:00
Chris Lattner
34b256e1a6 implement the 'string constant' optimization. This shrinks kc.bit from 
2878544 to 2815788

llvm-svn: 36818
 2007-05-06 00:35:24 +00:00
Chris Lattner
9df45744b0 further reduce the redundancy of types in the instruction encoding. This 
shrinks function bodies in kc++ from 891913B to 884073B

llvm-svn: 36817
 2007-05-06 00:21:25 +00:00
Chris Lattner
32d91f39ca stop encoding type/value pairs when the type is implied by the value. 
This shrinks the function block of kc++ from 1055K to 906K

llvm-svn: 36816
 2007-05-06 00:00:00 +00:00
Chris Lattner
8070a25149 handle gep aliasee 
llvm-svn: 36815
 2007-05-05 23:49:02 +00:00
Lauro Ramos Venancio
236cf4a51b Fix PR1390. 
Don't spill extra register to align the stack.

llvm-svn: 36814
 2007-05-05 23:44:41 +00:00
Chris Lattner
272510387e add a note 
llvm-svn: 36811
 2007-05-05 22:44:08 +00:00
Chris Lattner
26c55e2dda Implement Transforms/InstCombine/cast_ptr.ll 
llvm-svn: 36809
 2007-05-05 22:41:33 +00:00
Chris Lattner
46b06d19d4 wrap long lines 
llvm-svn: 36807
 2007-05-05 22:32:24 +00:00
Chris Lattner
0074283b61 the mason example is implemented. Move some examples out of llvm/test, 
upgrade the syntax of some other examples.

llvm-svn: 36806
 2007-05-05 22:29:06 +00:00
Chris Lattner
a13a7d375c implement anyextend from i1 -> i64 
llvm-svn: 36802
 2007-05-05 22:17:00 +00:00
Chris Lattner
9f8e81f9d3 move CodeGen/X86/overlap-add.ll here. 
llvm-svn: 36799
 2007-05-05 22:10:24 +00:00
Duncan Sands
4459cd664c Use the personality function that was registered with MMI rather than 
hardwiring in the C++ one.

llvm-svn: 36789
 2007-05-05 20:27:00 +00:00
Chris Lattner
d1534330ee Propagate alignment/volatility in two places. 
Implement support for expanding a bitcast from an illegal vector type to
a legal one (e.g. 4xi32 -> 4xf32 in SSE1).  This fixes PR1371 and
CodeGen/X86/2007-05-05-VecCastExpand.ll

llvm-svn: 36787
 2007-05-05 19:39:05 +00:00
Chris Lattner
ed5887b739 add support for BLOCKINFO records at the module level. This fixes the reader 
issues reid noticed last night.

llvm-svn: 36785
 2007-05-05 18:57:30 +00:00
Chris Lattner
abff2ede40 Fix Transforms/LoopUnroll/2007-05-05-UnrollMiscomp.ll and PR1385. 
If we have a LCSSA, only modify the input value if the inval was defined
by an instruction in the loop.  If defined by something before the loop,
it is still valid.

llvm-svn: 36784
 2007-05-05 18:49:57 +00:00
Chris Lattner
fba294126e make a temporary for *SI, no functionality change. 
llvm-svn: 36782
 2007-05-05 18:36:36 +00:00