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27985 Commits

Author SHA1 Message Date
Jim Grosbach
30eae3c022 PR2985 / <rdar://problem/6584986> 
When compiling in Thumb mode, only the low (R0-R7) registers are available
for most instructions. Breaking the low registers into a new register class
handles this. Uses of R12, SP, etc, are handled explicitly where needed
with copies inserted to move results into low registers where the rest of
the code generator can deal with them.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68545 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-07 20:34:09 +00:00
Torok Edwin
68c405d6e8 fix style. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68542 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-07 19:45:59 +00:00
Torok Edwin
eb55f3ea3c Another attempt at fixing PR2975. 
Types can have references to eachother, so we can't just call destroy on them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68523 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-07 17:23:02 +00:00
Chris Lattner
62ce3b31a7 fix rdar://6762290, a crash compiling cxx filt with clang. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68500 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-07 05:03:34 +00:00
Chris Lattner
683b08cf7c remove empty section 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68485 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-07 02:55:53 +00:00
Bob Wilson
8f3434647d Handle 'a' modifier in ARM inline assembly. 
Patch by Richard Pennington.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68464 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 21:46:51 +00:00
Torok Edwin
5ce1b11412 revert r68457, its crashing in make check. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68459 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 20:57:34 +00:00
Chris Lattner
e2a466bfa9 Teach llvm-bcanalyzer to skip over the header we use on LLVM IR files. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68458 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 20:54:32 +00:00
Torok Edwin
59d5f83b32 fix (part of) memory leak on shutdown. See PR2975. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68457 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 20:49:21 +00:00
Ed Schouten
b5e0a96a8d Let the strcat optimizer return the pointer to the start of the buffer, 
instead of the place where it started to perform the string copy.

- PR3661
- Patch by Benjamin Kramer!


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68443 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 13:06:48 +00:00
Sanjiv Gupta
cae1b628a7 Map stack based frameindices for spills to zero based indices that can be accessed based on an external symbol defining the location of temporary data for a function. For example: we have spill slots addressed as foo.tmp + 0, foo.tmp + 1 etc. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68442 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-06 10:54:50 +00:00
Nick Lewycky
5a30f4f84a Remove bogus include. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68421 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-04 07:42:46 +00:00
Nick Lewycky
21cc4460ef Add support for embedded metadata to LLVM. This introduces two new types of 
Constant, MDString and MDNode which can only be used by globals with a name
that starts with "llvm." or as arguments to a function with the same naming
restriction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68420 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-04 07:22:01 +00:00
Bob Wilson
eec4b2d730 Wrap some lines to fix indentation problems. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68405 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 21:08:42 +00:00
Bob Wilson
1b46a68015 Fix some comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68404 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 20:53:25 +00:00
Dan Gohman
f50c7981ae Fix a TargetLowering optimization so that it doesn't duplicate 
loads when an input node has multiple uses.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68398 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 20:11:30 +00:00
Oscar Fuentes
fcf054bbd4 CMake: removed IA64AsmPrinter.cpp from lib/Target/IA64/CMakeLists.txt 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68384 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 12:11:43 +00:00
Anton Korobeynikov
6c5cfec73e Separate MIPS asmprinter 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68383 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 10:41:41 +00:00
Anton Korobeynikov
60a19a4edd Fix target library name 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68382 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 10:41:17 +00:00
Anton Korobeynikov
c67d1127d0 Fix comment 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68381 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 10:41:00 +00:00
Anton Korobeynikov
ea38970596 Move IA64 asmprinter to separate library 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68380 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 10:38:51 +00:00
Mon P Wang
1e95580925 Added a x86 dag combine to increase the chances to use a 
movq for v2i64 on x86-32.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68368 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 02:43:30 +00:00
Dan Gohman
8f9643f0f7 Delete ISD::INSERT_SUBREG and ISD::EXTRACT_SUBREG, which are unused. 
Note that these are distinct from TargetInstrInfo::INSERT_SUBREG
and TargetInstrInfo::EXTRACT_SUBREG, which are used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68355 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 00:25:26 +00:00
Chris Lattner
6f532a988e use higher level APIs. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68351 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-03 00:02:39 +00:00
Sanjiv Gupta
c2eb87afc1 Fixed build warnings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68333 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-02 18:33:12 +00:00
Sanjiv Gupta
5274a4afb7 To convert the StopPoint insn into an assembler directive by ISel, we need to have access to the line number field. So we convert that info as an operand by custom handling DBG_STOPPOINT in legalize. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68329 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-02 18:03:10 +00:00
Sanjiv Gupta
b84d5a476a Params are not being generated as static globals now. The caller passes them onto the callee's stack directly and the callee loads the argvals from its own stack. Clang generated frameindexes validatd by recalculating the stack as if all frameindexes represent 1-byte slots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68327 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-02 17:42:00 +00:00
Mikhail Glushenkov
7074875642 Fix build on Linux. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68269 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-02 01:11:37 +00:00
Owen Anderson
e8a290fefc Reapply r68211, with the miscompilations it caused fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68262 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 23:53:49 +00:00
Devang Patel
9dfa1671fc Clean up pass manager cache after each run. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68254 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 22:34:41 +00:00
Chris Lattner
5867de1243 silence warning in release-asserts build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68253 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 22:14:45 +00:00
Daniel Dunbar
23e97b05da Add llvm::Triple class for abstracting access to target triples. 
- The code is silly, I'm just amusing myself. Rewrite to be efficient
   if you like. :)

Also, if you wish to debate the proper names of the triple components
I'm all ears.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68252 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 21:53:23 +00:00
Dan Gohman
de551f91d8 Use CHAR_BIT instead of hard-coding 8 in several places where it 
is appropriate. This helps visually differentiate host-oriented
calculations from target-oriented calculations.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68227 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 18:45:54 +00:00
Dan Gohman
77c5b0d7dc Use LLVM type names instead of C type names in comments, to be 
less ambiguous and less C-specific.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68219 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 18:10:16 +00:00
Bob Wilson
bf6396bed0 Fix PR3862: Recognize some ARM-specific constraints for immediates in inline 
assembly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68218 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 17:58:54 +00:00
Dan Gohman
e63c4a2010 Revert r68172. It caused regressions in 
Applications/Burg/burg
  Applications/ClamAV/clamscan
and many other tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68211 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 16:37:47 +00:00
Chris Lattner
c23c1fc559 hopefully fix an apparent build error on windows. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68175 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 02:03:38 +00:00
Chris Lattner
7d9eb5884c fix a serious regression I introduced in my previous patch. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68173 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 01:43:03 +00:00
Owen Anderson
f41fcbb60d Enhance GVN to propagate simple conditionals. This fixes PR3921. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68172 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 01:20:45 +00:00
Misha Brukman
d485e885f0 * Fixed spelling of `invertible' 
* Simplified if statement


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68163 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-04-01 00:15:46 +00:00
Chris Lattner
46e7740a44 reimplement BitcodeReaderValueList in terms of WeakVH instead of making 
it be an LLVM IR User object.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68156 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 22:55:09 +00:00
Chris Lattner
d3c7b7359d Make the key of ValueRankMap an AssertingVH, so that we die violently 
if it dangles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68150 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 22:13:29 +00:00
Chris Lattner
722272df41 Add two new classes: WeakVH and AssertingVH. These are both "ValueHandles", 
which are effectively smart pointers to Value*'s.  They are both very light
weight and simple, and react to values being destroyed or being RAUW'd.

WeakVN does a best effort to follow a value around, including through RAUW 
operations and will get nulled out of the value is destroyed.  This is useful
for the eventual "metadata that references a value" work, because it is a
reference to a value that does not show up on its use_* list.

AssertingVH is a pointer that compiles down to a dumb raw pointer when 
assertions are disabled.  When enabled, it emits an assertion if the 
pointed-to value is destroyed while it is still being referenced.  This
is very useful for Maps and other things, and should have caught the recent
bugs in CallGraph and Reassociate, for example.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68149 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 22:11:05 +00:00
Evan Cheng
de62192843 Throttle back "fold select into operand" transformation. InstCombine should not generate selects of two constants unless they are selects of 0 and 1. 
e.g.
define i32 @t1(i32 %c, i32 %x) nounwind {
       %t1 = icmp eq i32 %c, 0
       %t2 = lshr i32 %x, 18
       %t3 = select i1 %t1, i32 %t2, i32 %x
       ret i32 %t3
}

was turned into

define i32 @t2(i32 %c, i32 %x) nounwind {
       %t1 = icmp eq i32 %c, 0
       %t2 = select i1 %t1, i32 18, i32 0
       %t3 = lshr i32 %x, %t2
       ret i32 %t3
}

For most targets, that means materializing two constants and then a select. e.g. On x86-64

movl    %esi, %eax
shrl    $18, %eax
testl   %edi, %edi
cmovne  %esi, %eax
ret

=>

xorl    %eax, %eax
testl   %edi, %edi
movl    $18, %ecx
cmovne  %eax, %ecx
movl    %esi, %eax
shrl    %cl, %eax
ret

Also, the optimizer and codegen can reason about shl / and / add, etc. by a constant. This optimization will hinder optimizations using ComputeMaskedBits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68142 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 20:42:45 +00:00
Evan Cheng
6fb2168aae Fully general expansion of integer shift of any size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68134 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 19:39:24 +00:00
Evan Cheng
d54f2d571d i128 shift libcalls are not available on x86. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68133 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 19:38:51 +00:00
Dan Gohman
968dc7a207 Reapply 68073, with fixes. EH Landing-pad basic blocks are not 
entered via fall-through. Don't miss fallthroughs from blocks
terminated by conditional branches. Also, move
isOnlyReachableByFallthrough out of line.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68129 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 18:39:13 +00:00
Devang Patel
28c531cdbb Update call graph after inlining invoke. 
Patch by Jay Foad.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68120 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 17:36:12 +00:00
Daniel Dunbar
be46c79501 Add llvm::sys::getHostTriple and remove 
llvm::sys::getOS{Name,Version}.

Right now the implementation just derives from LLVM_HOSTTRIPLE (which
is wrong, but it doesn't look like we have a define for the target
triple). Ideally this routine would actually be able to compute the
triple for targets we care about.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68118 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 17:30:15 +00:00
Dan Gohman
456e281c11 Minor top-level comment fix. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68113 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:51:18 +00:00
Rafael Espindola
523249f856 remove unused arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68109 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 16:16:57 +00:00
Bill Wendling
df4881c68a Really temporarily revert r68073. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68100 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:42:40 +00:00
Bill Wendling
e67f5e4273 Oy! When reverting r68073, I added in experimental code. Sorry... 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68099 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:41:31 +00:00
Owen Anderson
696a1307ba Remove the "fast" cases for spill and restore point determination, as these were subtlely wrong in obscure cases. Patch the testcase 
to account for this change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68093 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:27:09 +00:00
Bill Wendling
8fe00540fc Revert r68073. It's causing a failure in the Apple-style builds. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68092 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 08:26:26 +00:00
Dan Gohman
07c26ee87e Fix live-out reg logic to not insert over-aggressive AssertZExt 
instructions. This fixes lua.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68083 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 01:38:29 +00:00
Evan Cheng
4d95232469 X86 address mode isel tweak. If the base of the address is also used by a CopyToReg (i.e. it's likely live-out), do not fold the sub-expressions into the addressing mode to avoid computing the address twice. The CopyToReg use will be isel'ed to a LEA, re-use it for address instead. 
This is not yet enabled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68082 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-31 01:13:53 +00:00
Dan Gohman
80c93e7442 Except in asm-verbose mode, avoid printing labels for blocks that are 
only reachable via fall-through edges. This dramatically reduces the
number of labels printed, and thus also the number of labels the
assembler must parse and remember.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68073 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 22:55:17 +00:00
Devang Patel
b23c232fc8 Loop Index Split can eliminate a loop if it can determin if loop body is executed only once. There was a bug in determining IV based value of the iteration for which the loop body is executed. Fix it. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68071 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 22:24:10 +00:00
Evan Cheng
73f24c9f0d When optimzing a mul by immediate into two, the resulting mul's should get a x86 specific node to avoid dag combiner from hacking on them further. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68066 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 21:36:47 +00:00
Evan Cheng
e6f350d755 Turn a 2-address instruction into a 3-address one when it's profitable even if the two-address operand is killed. 
e.g.
%reg1024<def> = MOV r1
%reg1025<def> = ADD %reg1024, %reg1026
r0            = MOV %reg1025

If it's not possible / profitable to commute ADD, then turning ADD into a LEA saves a copy.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68065 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 21:34:07 +00:00
Bill Wendling
fd302b7056 Balance out quote in debug output. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68059 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:32:22 +00:00
Bill Wendling
430d423e4b Fix grammar-o in comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68057 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:30:02 +00:00
Dan Gohman
6d1b89e74f Constify arguments in isSuccessor and isLayoutSuccessor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68054 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 20:06:29 +00:00
Bob Wilson
d83712ad67 Fix comment to match function name. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68050 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 18:49:37 +00:00
Devang Patel
6d9a2df4ec getEntryFor() may invalidate DenseMap iterator. 
Walking an invalidated iterator is not a good idea.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68047 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 18:34:47 +00:00
Anton Korobeynikov
29519b1de0 Fix thinko: put stuff with both global and local relocations into data.rel{.ro}, not .local 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68036 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 17:37:43 +00:00
Anton Korobeynikov
48738b9244 Fix infinite looping 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68034 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:28:21 +00:00
Anton Korobeynikov
fd653071b5 Properly propagate Kind. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68033 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:28:00 +00:00
Anton Korobeynikov
fca82deecb Do not propagate ELF-specific stuff (data.rel) into other targets. This simplifies code and also ensures correctness. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68032 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:27:43 +00:00
Anton Korobeynikov
71a7c6cde0 Add data.rel stuff 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68031 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-30 15:27:03 +00:00
Anton Korobeynikov
721c2c647e IA64 is as weird as Alpha wrt r/o relocs :) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68007 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 17:14:35 +00:00
Anton Korobeynikov
01209bc12a Alpha always requires global relocations to be r/w regardless of PIC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68006 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 17:14:14 +00:00
Anton Korobeynikov
db2323148b Honour relocation behaviour stuff for ro objects 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68005 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 17:13:49 +00:00
Anton Korobeynikov
ab267a2823 Extend the relocation tracker handler, so we can filter on different 'kinds' of relocations required. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68004 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 17:13:18 +00:00
Duncan Sands
004e27cc1b Fix PR3899: add support for extracting floats from vectors 
when using -soft-float.
Based on a patch by Jakob Stoklund Olesen.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67996 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 13:51:06 +00:00
Chris Lattner
6a0dcc1077 now that you can put a PointerIntPair in a SmallPtrSet, remove some 
hackish workarounds from memdep


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67971 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-29 00:24:04 +00:00
Chris Lattner
352f3e5d37 add a note 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67953 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 19:26:55 +00:00
Rafael Espindola
a0a4f07fb6 Use array_lengthof 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67950 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 19:02:18 +00:00
Rafael Espindola
da945e3bb2 Have only one definition of X86AddrNumOperands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67949 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 18:55:31 +00:00
Rafael Espindola
b449a68146 Make code a bit less brittle by no hardcoding the number 
of operands in an address in so many places.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67945 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 17:03:24 +00:00
Arnold Schwaighofer
11ff97801b Make check in CheckTailCallReturnConstraints for ignorable instructions between 
a CALL and a RET node more generic. Add a test for tail calls with a void
return.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67943 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 12:36:29 +00:00
Arnold Schwaighofer
e75fd69f15 Enable tail call optimization for functions that return a struct (bug 3664) and for functions that return types that need extending (e.g i1). 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67934 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 08:33:27 +00:00
Evan Cheng
0b0cd9113a Optimize some 64-bit multiplication by constants into two lea's or one lea + shl since imulq is slow (latency 5). e.g. 
x * 40
=>
shlq    $3, %rdi
leaq    (%rdi,%rdi,4), %rax

This has the added benefit of allowing more multiply to be folded into addressing mode. e.g.
a * 24 + b
=>
leaq    (%rdi,%rdi,2), %rax
leaq    (%rsi,%rax,8), %rax


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67917 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 05:57:29 +00:00
Chris Lattner
e8b64106ec move a large method out of line. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67892 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-28 02:08:47 +00:00
Dan Gohman
a80efceb93 Fix what surely must be a copy+pasto. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67881 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 23:55:04 +00:00
Dan Gohman
84d08db733 Initialize LiveOutInfo's APInt members to zero, as APInt's 
default constructor produces an uninitialized APInt.
This fixes PR3896.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67879 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 23:51:02 +00:00
Jim Grosbach
0ede14f5c0 remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67874 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 23:06:27 +00:00
Gabor Greif
d257f7d96b "ghostify" the ilist<Function> sentinel 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67872 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 22:28:33 +00:00
Rafael Espindola
705d800879 Avoid hardcoding that X86 addresses have 4 operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67848 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 15:57:50 +00:00
Rafael Espindola
e4d5d34cfc Use less hard coded constants to make the code less brittle. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67846 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 15:45:05 +00:00
Rafael Espindola
a82dfca8c6 I am trying to add a segment to the X86 addresses matching to 
improve TLS support (see http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090309/075220.html), but that code is VERY brittle.

This patch just makes it a bit more resistant.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67843 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 15:26:30 +00:00
Duncan Sands
0b8365c98b Revert r67798: it breaks llvm-gcc bootstrap on x86-64-linux, presumably due to 
a miscompilation.

make[4]: Entering directory `gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include'
if [ ! -d "./x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch" ]; then \
          mkdir -p ./x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch; \
        fi; \
        gcc-4.2.llvm-objects/./gcc/xgcc -shared-libgcc -Bgcc-4.2.llvm-objects/./gcc -nostdinc++ 
-Lgcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/src -Lgcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs 
-B/usr/local/gnat-llvm/x86_64-unknown-linux-gnu/bin/ -B/usr/local/gnat-llvm/x86_64-unknown-linux-gnu/lib/ -isystem 
/usr/local/gnat-llvm/x86_64-unknown-linux-gnu/include -isystem /usr/local/gnat-llvm/x86_64-unknown-linux-gnu/sys-include -Winvalid-pch -Wno-deprecated -x 
c++-header -g -O2  -D_GNU_SOURCE -Igcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu 
-Igcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include -Igcc-4.2.llvm/libstdc++-v3/libsupc++ -O2 -g 
gcc-4.2.llvm/libstdc++-v3/include/precompiled/stdtr1c++.h -o x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch/O2g.gch
In file included from gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/repeat.h:247,
                 from gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/functional:1098,
                 from gcc-4.2.llvm/libstdc++-v3/include/precompiled/stdtr1c++.h:53:
gcc-4.2.llvm-objects/x86_64-unknown-linux-gnu/libstdc++-v3/include/tr1/functional_iterate.h:417: internal compiler error: in ggc_recalculate_in_use_p, at 
ggc-page.c:1602
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://llvm.org/bugs/> for instructions.
make[4]: *** [x86_64-unknown-linux-gnu/bits/stdtr1c++.h.gch/O2g.gch] Error 1


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67839 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 14:56:47 +00:00
Mikhail Glushenkov
d50d32b940 -write-graph now can be used with -o. 
Makes it possible to set the output file name.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67835 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 12:57:14 +00:00
John Mosby
ea4d351fc6 Shrink wrapping in PEI: initial release. Finishing development, enable with --shrink-wrap. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67828 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 06:09:40 +00:00
Dale Johannesen
2d69724938 One more place to skip debug info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67811 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-27 01:13:37 +00:00
Devang Patel
fafd98b23e While hoisting an instruction, update alias info set tracker. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67798 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 23:48:52 +00:00
Evan Cheng
9272253381 -no-implicit-float means explicit fp operations are legal. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67784 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 23:06:32 +00:00
Mikhail Glushenkov
3cd3c725e0 Fix misc. small issues with debug visualization. 
Detailed bug report:
http://llvm.org/bugs/show_bug.cgi?id=3873

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67768 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 21:23:48 +00:00
Evan Cheng
9d7b5309c2 tADDhirr is a thumb instruction. Do not allow this code to be reached in non-thumb mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67765 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 19:09:01 +00:00
Owen Anderson
b98bbb7597 Don't assign a new stack slot if the pre-alloc splitter already assigned one. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67764 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 18:53:38 +00:00
Bill Wendling
a02a3dda56 Pull transform from target-dependent code into target-independent code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67742 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 06:14:09 +00:00
Chris Lattner
e7fa1f2a49 fix warning in -asserts mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67739 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 05:29:34 +00:00
Chris Lattner
e3a85838da fix some warnings in release-asserts mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67738 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 05:28:26 +00:00
Chris Lattner
d4015074e4 fix an apparently real bug exposed by a warning in -asserts mode. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67737 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 05:28:14 +00:00
Chris Lattner
022a27e363 fix warning in -asserts build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67736 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 05:25:59 +00:00
Bill Wendling
8b4b874cc6 Match this pattern so that we can generate simpler code: 
%a = ...
  %b = and i32 %a, 2
  %c = srl i32 %b, 1
  %d = br i32 %c, 

into

  %a = ...
  %b = and %a, 2
  %c = X86ISD::CMP %b, 0
  %d = X86ISD::BRCOND %c ...

This applies only when the AND constant value has one bit set and the SRL
constant is equal to the log2 of the AND constant. The back-end is smart enough
to convert the result into a TEST/JMP sequence.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67728 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 01:47:50 +00:00
Bill Wendling
bddc442a00 Doxygen-ify comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67727 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 01:46:56 +00:00
Dale Johannesen
6aae1d6582 Skip debug info one more place. (This one gets 
called from llc, not opt, but it's an IR level
optimization nevertheless.)



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67724 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-26 01:15:07 +00:00
Devang Patel
575ec806e0 Before deleting a basic block, give other loop passes a chance cleanup analysis values, related to the instructions in the basic block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67719 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 23:57:48 +00:00
Evan Cheng
3927f438b5 Revert 67132. This is breaking some objective-c apps. 
Also fixes SDISel so it *does not* force promote return value if the function is not marked signext / zeroext.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67701 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 20:20:11 +00:00
Dale Johannesen
beaec4cbf6 When optimizing with debug info, don't keep the 
stoppoint nodes around until Legalize; doing this
imposed an ordering on a sequence of loads that
came from different lines, interfering with scheduling.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67692 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 17:36:08 +00:00
Chris Lattner
ad9ad7c827 Fix a bug in our autoupgrade support: in an argument list to a function 
call, we should treat "i64 zext" as the start of a constant expr, but
"i64 0 zext" as an argument with an obsolete attribute on it (this form
is already tested by test/Assembler/2007-07-30-AutoUpgradeZextSext.ll).

Make the autoupgrade logic more discerning to avoid treating "i64 zext"
as an old-style attribute, causing us to reject a valid constant expr.
This fixes PR3876.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67682 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 06:36:36 +00:00
Gabor Greif
0c8f7dc67c do not rely on callee being operand 0 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67681 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 06:32:59 +00:00
Devang Patel
25cb0d75d0 Do not ignore DW_TAG_class_type! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67675 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 03:52:06 +00:00
Evan Cheng
42bf74be14 CodeGen still defaults to non-verbose asm, but llc now overrides it and default to verbose. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67668 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 01:47:28 +00:00
Evan Cheng
7db860d4de Don't print global names twice with -asm-verbose. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67667 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 01:08:42 +00:00
Chris Lattner
e8e4921967 Fix PR3874 by restoring a condition I removed, but making it more 
precise than it used to be.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67662 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 00:28:58 +00:00
Devang Patel
86bda4174a Do not ignore DW_TAG_class_type! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67661 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-25 00:28:40 +00:00
Chris Lattner
569a7f087a oops, I intended to remove this, not comment it out. Thanks Duncan! 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67657 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 23:48:25 +00:00
Evan Cheng
78a5bd5dbd Fix PR3845: Avoid stale MachineInstruction pointer reference. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67649 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 20:33:17 +00:00
Gabor Greif
f73e319751 simplify logic and get rid of the assumption that operand 0 is the callee 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67642 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 19:28:39 +00:00
Chris Lattner
a0e6969bbe canonicalize inttoptr and ptrtoint instructions which cast pointers 
to/from integer types that are not intptr_t to convert to intptr_t
then do an integer conversion to the dest type.  This exposes the
cast to the optimizer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67638 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 18:35:40 +00:00
Dale Johannesen
1f8c564d7d fix one more fp80 case (used only by Interpreter) 
and streamline code here a bit.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67636 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 18:16:17 +00:00
Chris Lattner
4f9797d683 two changes: 
1. Make instcombine always canonicalize trunc x to i1 into an icmp(x&1).  This 
   exposes the AND to other instcombine xforms and is more of what the code
   generator expects.
2. Rewrite the remaining trunc pattern match to use 'match', which 
   simplifies it a lot.
   


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67635 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 18:15:30 +00:00
Dale Johannesen
e330ae5b32 Change JIT for different layout of fp80. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67629 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 17:35:45 +00:00
Chris Lattner
e2f7bf8e2d more tidying: name the components of PhysReg in the case when 
the target constraint specifies a specific physreg.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67618 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 15:27:37 +00:00
Chris Lattner
b3b4484e3d Tidy a bit more. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67617 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 15:25:07 +00:00
Chris Lattner
fc9d161f16 simplify this code a bit now that "allocation to a vreg class" can never 
fail.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67616 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 15:22:11 +00:00
Dan Gohman
a96dc14968 I was convinced that it's ok to allow a second i8 return value 
to be returned in DL. LLVM's multiple-return-value support is
not ABI-conforming; front-ends that wish to have code emitted
that conforms to an ABI are currently expected to make
arrangements for this on their own rather than assuming that
multiple-return-values will automatically do the right thing.
This commit doesn't fundamentally change this situation.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67588 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 01:04:34 +00:00
Dan Gohman
8f4aa333d0 Minor compile-time optimization; don't bother checking 
canClobberPhysRegDefs if the successor node doesn't
clobber any physical registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67587 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 00:50:07 +00:00
Dan Gohman
002b44f1d7 Add a pre-pass to the burr-list scheduler which makes adjustments to 
help out the register pressure reduction heuristics in the case of
nodes with multiple uses. Currently this uses very conservative
heuristics, so it doesn't have a broad impact, but in cases where it
does help it can make a big difference.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67586 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 00:49:12 +00:00
Evan Cheng
f1c0ae9de5 Do not emit comments unless -asm-verbose. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67580 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-24 00:17:40 +00:00
Dale Johannesen
16581bf931 Use a SmallPtrSet instead of std::set. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67578 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 23:39:20 +00:00
Evan Cheng
5d088fee7c Fix a bug in spill weight computation. If the alias is a super-register, and the super-register is in the register class we are trying to allocate. Then add the weight to all sub-registers of the super-register even if they are not aliases. 
e.g. allocating for GR32, bh is not used, updating bl spill weight.                                                                                                        
     bl should get the same spill weight otherwise it will be choosen                                                                                              
     as a spill candidate since spilling bh doesn't make ebx available.
This fix PR2866.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67574 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 22:57:19 +00:00
Dale Johannesen
1b25cb2416 Fix internal representation of fp80 to be the 
same as a normal i80 {low64, high16} rather
than its own {high64, low16}.  A depressing number
of places know about this; I think I got them all.
Bitcode readers and writers convert back to the old
form to avoid breaking compatibility.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67562 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 21:16:53 +00:00
Dan Gohman
fa9afef7ea When unfolding a load during scheduling, the new operator node has 
a data dependency on the load node, so it really needs a
data-dependence edge to the load node, even if the load previously
existed.

And add a few comments.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67554 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 20:20:43 +00:00
Evan Cheng
2824a65550 Fix PR3391 and PR3864. Reg allocator infinite looping. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67544 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 18:24:37 +00:00
Dan Gohman
8cccf0ef0c Don't set SUnit::hasPhysRegDefs to true unless the defs are 
actually have uses, which reflects the way it's used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67540 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 17:39:36 +00:00
Dan Gohman
a5c8ae233e Fix canClobberPhysRegDefs to check all SDNodes grouped together 
in an SUnit, instead of just the first one. This fix is needed
by some upcoming scheduler changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67531 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 16:23:01 +00:00
Dan Gohman
3974667c1a Add a new bit to SUnit to record whether a node has implicit physreg 
defs, regardless of whether they are actually used.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67528 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 16:10:52 +00:00
Dan Gohman
f871ccb853 Now that errs() is properly non-buffered, there's no need to 
explicitly flush it.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67526 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 15:57:19 +00:00
Dan Gohman
2ba682c7e2 LoopVR is not CFGOnly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67524 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 15:50:52 +00:00
Dan Gohman
a9d71e1319 Enhance LiveValues to work on PHI operands. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67523 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 15:49:37 +00:00
Dan Gohman
2004eb6272 Correct some comments. Operand numbers start at 0. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67518 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 15:40:10 +00:00
Evan Cheng
fb11288109 Model inline asm constraint which ties an input to an output register as machine operand TIED_TO constraint. This eliminated the need to pre-allocate registers for these. This also allows register allocator can eliminate the unneeded copies. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67512 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 08:01:15 +00:00
Evan Cheng
7d6d4b360f Do not fold away subreg_to_reg if the source register has a sub-register index. That means the source register is taking a sub-register of a larger register. e.g. On x86 
%RAX<def> = ...
%RAX<def> = SUBREG_TO_REG 0, %EAX:3<kill>, 3
The first def is defining RAX, not EAX so the top bits were not zero-extended.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67511 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 07:19:58 +00:00
Chris Lattner
a8bd27ff66 fix a bug Alexei Svitkine pointed out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67510 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 06:46:20 +00:00
Chris Lattner
eab5cb3b55 When we restore signal handlers, restore them back to what they 
were when we came around, not to their default handler.  This 
should fix PR3848


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67509 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 05:55:36 +00:00
Chris Lattner
1c4d8a00ab factorize signal registration, part of PR3848. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67508 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-03-23 05:42:29 +00:00