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Author SHA1 Message Date
Chris Lattner
e5688368c6 update memdep when an instruction is deleted. This code isn't 
actually reached in the testcase in PR8954, but it's safe and good
practice.

llvm-svn: 123224
 2011-01-11 08:19:16 +00:00
Chris Lattner
a82a6cfe6d when MergeBlockIntoPredecessor merges two blocks, update MemDep if it 
is floating around in the ether.

llvm-svn: 123223
 2011-01-11 08:16:49 +00:00
Chris Lattner
dc7b2160ba Fix FoldSingleEntryPHINodes to update memdep and AA when it deletes 
phi nodes.  It is called from MergeBlockIntoPredecessor which is 
called from GVN, which claims to preserve these.

I'm skeptical that this is the actual problem behind PR8954, but
this is a stab in the right direction.

llvm-svn: 123222
 2011-01-11 08:13:40 +00:00
Chris Lattner
b1a9c9ed36 random cleanups 
llvm-svn: 123221
 2011-01-11 08:00:40 +00:00
Chris Lattner
feade29ab8 merge tests into one crash.ll test. 
llvm-svn: 123220
 2011-01-11 07:50:07 +00:00
Chris Lattner
5731a92f5b remove a bogus assertion: the latch block of a loop is not 
neccesarily an uncond branch to the header.  This fixes 
PR8955 (the assertion tripping).

llvm-svn: 123219
 2011-01-11 07:47:59 +00:00
Chris Lattner
14bf29d7a0 the GEP faq says that only inbounds geps are guaranteed to not overflow. 
llvm-svn: 123218
 2011-01-11 06:44:41 +00:00
Jakob Stoklund Olesen
43e92a1d28 Revert r123207: "Turn on memdep's verifyRemoved() in an attempt to smoke out the cause of our gcc bootstrap miscompare." 
It didn't.

llvm-svn: 123215
 2011-01-11 04:05:39 +00:00
Michael J. Spencer
6d4a8a7b72 Support/Path: Deprecate PathV1::isDirectory and replace all uses with PathV2::is_directory. 
llvm-svn: 123209
 2011-01-11 01:21:55 +00:00
Jakob Stoklund Olesen
d8abef4798 Turn on memdep's verifyRemoved() in an attempt to smoke out the cause of our gcc bootstrap miscompare. 
llvm-svn: 123207
 2011-01-11 01:18:03 +00:00
Chandler Carruth
250dce460c Teach constant folding to perform conversions from constant floating 
point values to their integer representation through the SSE intrinsic
calls. This is the last part of a README.txt entry for which I have real
world examples.

llvm-svn: 123206
 2011-01-11 01:07:24 +00:00
Chandler Carruth
acb82e863d FileCheck-ize a test, and move a no-longer calling test case to another 
file and make it actually test something...

llvm-svn: 123205
 2011-01-11 01:07:20 +00:00
Owen Anderson
4479341626 Fix a random missed optimization by making InstCombine more aggressive when determining which bits are demanded by 
a comparison against a constant.

llvm-svn: 123203
 2011-01-11 00:36:45 +00:00
Eric Christopher
5a4d64216f Move ExpandAtomic into the integer expansion routines - it's only used there. 
llvm-svn: 123202
 2011-01-11 00:36:08 +00:00
Eric Christopher
68263285d5 Even if we don't have 7 bytes of stack space we may need to save and 
restore the stack pointer from the frame pointer on thumbv6.

Fixes rdar://8819685

llvm-svn: 123196
 2011-01-11 00:16:04 +00:00
Eric Christopher
934fa0fca0 Expand on the safeness of restoring the sp from the fp a bit more. 
llvm-svn: 123193
 2011-01-10 23:10:59 +00:00
Dale Johannesen
cd78621861 Fix PR 8916 (qv for analysis), at least the immediate problem. 
There's an inherent tension in DAGCombine between assuming
that things will be put in canonical form, and the Depth
mechanism that disables transformations when recursion gets
too deep.  It would not surprise me if there's a lot of little
bugs like this one waiting to be discovered.  The mechanism
seems fragile and I'd suggest looking at it from a design viewpoint.

llvm-svn: 123191
 2011-01-10 21:53:07 +00:00
Chris Lattner
c46188944e +0.0 vs -0.0 differences can be handled by looking at the user of the 
operation in some cases.

llvm-svn: 123190
 2011-01-10 21:01:17 +00:00
Daniel Dunbar
0e9ece99bb McARM: Flush out hard coded known non-predicated mnemonic list. 
llvm-svn: 123189
 2011-01-10 21:01:03 +00:00
Daniel Dunbar
3567bd2bcb McARM: Mark some T2 ...s instructions as codegen only, they aren't real 
instructions but are restricted pseudo forms.

llvm-svn: 123177
 2011-01-10 15:26:39 +00:00
Daniel Dunbar
acb825eae8 ARM/MC: Mark several '...S' instructions as codegen only, they aren't real 
instructions but are restricted pseudo forms.

llvm-svn: 123176
 2011-01-10 15:26:35 +00:00
Daniel Dunbar
9e911c13c5 MC/ARM/AsmParser: Minor nitty fixes. 
llvm-svn: 123175
 2011-01-10 15:26:21 +00:00
Daniel Dunbar
719295c2e2 MC/AsmMatcher: Fix indirect 80-col viola. 
llvm-svn: 123174
 2011-01-10 15:26:11 +00:00
Anton Korobeynikov
e74f0595f3 Fix merge fallout 
llvm-svn: 123172
 2011-01-10 12:56:18 +00:00
Anton Korobeynikov
abd9a868df Update CMake stuff 
llvm-svn: 123171
 2011-01-10 12:39:23 +00:00
Anton Korobeynikov
cf5967630b Rename TargetFrameInfo into TargetFrameLowering. Also, put couple of FIXMEs and fixes here and there. 
llvm-svn: 123170
 2011-01-10 12:39:04 +00:00
Daniel Dunbar
d17b4ac127 MC/ARM/AsmParser: Split out SplitMnemonicAndCC(). 
llvm-svn: 123169
 2011-01-10 12:24:52 +00:00
Chandler Carruth
5ac8ca39c0 Cleanup some of the constant folding code to consistently test intrinsic 
IDs when available rather than using a mixture of IDs and textual name
comparisons.

llvm-svn: 123165
 2011-01-10 09:02:58 +00:00
Chris Lattner
0e49a35bd2 fit in 80 cols and use MBB::isSuccessor instead of a hand 
rolled std::find.

llvm-svn: 123164
 2011-01-10 07:51:31 +00:00
Chandler Carruth
772e26df36 Teach instcombine about the rest of the SSE and SSE2 conversion 
intrinsics element dependencies. Reviewed by Nick.

llvm-svn: 123161
 2011-01-10 07:19:37 +00:00
Jakob Stoklund Olesen
32f1783ca1 Simplify a bunch of isVirtualRegister() and isPhysicalRegister() logic. 
These functions not longer assert when passed 0, but simply return false instead.

No functional change intended.

llvm-svn: 123155
 2011-01-10 02:58:51 +00:00
Chandler Carruth
7f854ac9a9 Fold two related tests into the newly FileCheck-ized test, migrating 
them to FileCheck as well.

llvm-svn: 123154
 2011-01-10 02:53:58 +00:00
Chandler Carruth
7c332e5abd Clean up and FileCheck-ize a test. 
llvm-svn: 123153
 2011-01-10 02:53:54 +00:00
Michael J. Spencer
bc362451c7 Fix Whitespace. 
llvm-svn: 123152
 2011-01-10 02:34:40 +00:00
Michael J. Spencer
917b043a16 Support/Path: Deprecate PathV1::exists and replace all uses with PathV2::fs::exists. 
llvm-svn: 123151
 2011-01-10 02:34:23 +00:00
Chris Lattner
1404348022 another random stab in the dark trying to fix llvm-gcc-i386-linux-selfhost 
llvm-svn: 123149
 2011-01-10 02:34:11 +00:00
Chris Lattner
867dbe1329 fix typo 
llvm-svn: 123148
 2011-01-10 02:33:34 +00:00
Chris Lattner
b5562212e2 another (more) aggressive attempt to bring llvm-gcc-i386-linux-selfhost 
back to life.

llvm-svn: 123146
 2011-01-10 00:47:34 +00:00
Chris Lattner
2bd48ecd43 expand on a note 
llvm-svn: 123145
 2011-01-10 00:33:01 +00:00
Chris Lattner
e8e9ec58bf temporarily disable memset formation from memsets in an effort to restore buildbot stability. 
llvm-svn: 123144
 2011-01-09 23:52:48 +00:00
Chris Lattner
749f1eff13 add a testcase I missed in previous commit. 
llvm-svn: 123143
 2011-01-09 23:52:31 +00:00
Chris Lattner
7926b7035f typo 
llvm-svn: 123142
 2011-01-09 23:48:41 +00:00
Chris Lattner
fc6d425076 xref a PR # 
llvm-svn: 123141
 2011-01-09 23:42:22 +00:00
Jakob Stoklund Olesen
98b20886ef Remove TargetRegisterInfo::NoRegister. 
Fix the TargetRegisterInfo::NoRegister places where someone preferred
typing 'TargetRegisterInfo::NoRegister' instead of typing '0'.

Note that TableGen is already emitting xx::NoRegister in xxGenRegisterNames.inc.

llvm-svn: 123140
 2011-01-09 23:20:48 +00:00
Chris Lattner
0643d32b61 add a fixme: ir isn't expressive enough. 
llvm-svn: 123139
 2011-01-09 23:02:10 +00:00
Chris Lattner
c8a9f4ca2b Step #4 in improving trip count analysis: HowFarToZero can analyze 
NUW AddRec's much more aggressively.  We now get a trip count
for @test2 in nsw.ll

llvm-svn: 123138
 2011-01-09 22:58:47 +00:00
Jakob Stoklund Olesen
e41db14dbf Change virtual register numbering to make more space for physical registers. 
The numbering plan is now:

0           NoRegister.
[1;2^30)    Physical registers.
[2^30;2^31) Stack slots.
[2^31;2^32) Virtual registers. (With -1u and -2u used by DenseMapInfo.)

Each segment is filled from the left, so any mistaken interpretation should
quickly cause crashes.

FirstVirtualRegister has been removed. TargetRegisterInfo provides predicates
conversion functions that should be used instead of interpreting register
numbers manually.

It is now legal to pass NoRegister to isPhysicalRegister() and
isVirtualRegister(). The result is false in both cases.

It is quite rare to represent stack slots in this way, so isPhysicalRegister()
and isVirtualRegister() require that isStackSlot() be checked first if it can
possibly return true. This allows a very fast implementation of the common
predicates.

llvm-svn: 123137
 2011-01-09 22:42:48 +00:00
Chris Lattner
09cfec2226 rearrange some code, no functionality change. 
llvm-svn: 123136
 2011-01-09 22:39:48 +00:00
Chandler Carruth
a4d454ae5e Add a note about the inability to model FP -> int conversions which 
perform rounding other than truncation in the IR. Common C code for this
turns into really an LLVM intrinsic call that blocks a lot of further
optimizations.

llvm-svn: 123135
 2011-01-09 22:36:18 +00:00
Chris Lattner
4efcd276de Step #3 to improving trip count analysis: If we fold 
a + {b,+,stride} into {a+b,+,stride}  (because a is LIV),
then the resultant AddRec is NUW/NSW if the client says it
is.

llvm-svn: 123133
 2011-01-09 22:31:26 +00:00