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Author SHA1 Message Date
Duncan Sands
73f0559779 If a GEP index simply advances by multiples of a type of zero size, 
then replace the index with zero.

llvm-svn: 119974
 2010-11-22 16:32:50 +00:00
Kalle Raiskila
8f1131e569 Fix a bug with extractelement on SPU. 
In the attached testcase, the element was
never extracted (missing rotate).

llvm-svn: 119973
 2010-11-22 16:28:26 +00:00
Rafael Espindola
e20c3d7c26 Add basic CFI methods to the streamer interface. 
llvm-svn: 119972
 2010-11-22 14:27:24 +00:00
Duncan Sands
ffcd1f61d9 Move the "gep undef" -> "undef" transform from instcombine to 
InstructionSimplify.

llvm-svn: 119970
 2010-11-22 13:42:49 +00:00
Rafael Espindola
5f582e980e Remove some #includes. 
llvm-svn: 119967
 2010-11-22 11:53:17 +00:00
Benjamin Kramer
632a91cba5 Implement the "if (X == 6 || X == 4)" -> "if ((X|2) == 6)" optimization. 
This currently only catches the most basic case, a two-case switch, but can be
extended later.

llvm-svn: 119964
 2010-11-22 09:45:38 +00:00
Duncan Sands
f0224e2119 Don't keep track of inserted phis in PromoteMemoryToRegister: the information 
is never used.  Patch by Cameron Zwarich.

llvm-svn: 119963
 2010-11-22 09:41:24 +00:00
Duncan Sands
99ff019c87 Fix a compiler warning about Kind being used uninitialized 
when assertions are disabled.

llvm-svn: 119962
 2010-11-22 09:38:00 +00:00
Eric Christopher
662ad8ba93 Pseudos default to 4byte size, let the instruction size field notice 
that branch tables are special.

llvm-svn: 119954
 2010-11-21 23:38:19 +00:00
Wesley Peck
e25f241e37 Implement ELF object file writing support for the MBlaze backend. Its not perfect yet, but it works for many tests. 
llvm-svn: 119952
 2010-11-21 22:06:28 +00:00
Wesley Peck
911abf2bc0 Implement branch analysis in the MBlaze backend. 
llvm-svn: 119951
 2010-11-21 21:53:36 +00:00
Wesley Peck
470c56eef5 Make it a little bit more explicit that the MBlaze backend only supports upto 
32-bit immediate values.

llvm-svn: 119950
 2010-11-21 21:39:46 +00:00
Wesley Peck
d77425e427 Fix an error in the MBlaze delay slot filler where instructions that already 
fill a delay slot are moved to fill a different delay slot.

llvm-svn: 119949
 2010-11-21 21:36:12 +00:00
Chris Lattner
621c62e20d fix comment 
llvm-svn: 119948
 2010-11-21 19:05:34 +00:00
Chris Lattner
dd03f96698 apparently tailcalls are better on darwin/x86-64 than on linux? 
llvm-svn: 119947
 2010-11-21 18:59:20 +00:00
Benjamin Kramer
3fb7d5556c Initialize MemDep's TD member so buildbots don't trip over an uninitialized pointer (TD is passed to PHITransAddr). 
I wonder why this didn't explode earlier.

llvm-svn: 119944
 2010-11-21 15:21:46 +00:00
Duncan Sands
c2b128ad7d Add a rather pointless InstructionSimplify transform, inspired by recent constant 
folding improvements: if P points to a type of size zero, turn "gep P, N" into "P".
More generally, if a gep index type has size zero, instcombine could replace the
index with zero, but that is not done here.

llvm-svn: 119942
 2010-11-21 13:53:09 +00:00
Duncan Sands
4ef7e7f158 Fix spelling. 
llvm-svn: 119941
 2010-11-21 12:43:13 +00:00
Bill Wendling
c5ab347eb6 More Thumb encodings. 
llvm-svn: 119940
 2010-11-21 11:49:36 +00:00
Bill Wendling
a472e7be70 Add encoding for ARM "trap" instruction. 
llvm-svn: 119938
 2010-11-21 11:05:29 +00:00
Bill Wendling
a017020098 The "trap" instruction is one of this which doesn't have a condition code. Hack 
the code to not add a "condition code" if it's trap.

llvm-svn: 119937
 2010-11-21 10:56:05 +00:00
Bill Wendling
3cce558ede - Give "trap" the correct encoding, at least according to Darwin's assembler. 
- Add comments saying where the encodings for other instructions came from.

llvm-svn: 119936
 2010-11-21 10:55:23 +00:00
Chris Lattner
1b3dffa2d1 apply Dan's fix for PR8268 which allows constant folding to handle indexes over 
zero sized elements.  This allows us to compile:

  #include <string>
  void foo() { std::string s; }

into an empty function.

llvm-svn: 119933
 2010-11-21 08:39:01 +00:00
Chris Lattner
1161b003a0 add some helper methods for asmprinter flags, from PR8417 
llvm-svn: 119932
 2010-11-21 08:30:55 +00:00
Chris Lattner
4aaa7fbb98 implement PR8524, apparently mainline gas accepts movq as an alias for movd 
when transfering between i64 gprs and mmx regs.

llvm-svn: 119931
 2010-11-21 08:18:57 +00:00
Chris Lattner
62a3186e3e rework some DSE paths to use the newly-public "getPointerDependencyFrom" 
method in MemDep instead of inserting an instruction, doing a query,
then removing it.  Neither operation is effectively cached.

llvm-svn: 119930
 2010-11-21 08:06:10 +00:00
Chris Lattner
0d1afc82b2 the getLocationForSource/Dest methods can be static. 
llvm-svn: 119929
 2010-11-21 08:05:25 +00:00
Chris Lattner
a39a40d351 add "getLocation" method to AliasAnalysis for getting the source and 
destination location of a memcpy/memmove.  I'm not clear about whether
TBAA works on these, so I'm leaving it out for now.  Dan, please revisit
this when convenient.

llvm-svn: 119928
 2010-11-21 07:51:27 +00:00
Chris Lattner
3a0edfb37c implement PR8576, deleting dead stores with intervening may-alias stores. 
llvm-svn: 119927
 2010-11-21 07:34:32 +00:00
Chris Lattner
32a16bce7a file checkize 
llvm-svn: 119926
 2010-11-21 07:32:40 +00:00
Chris Lattner
ed3b3d47f6 add some random notes. 
llvm-svn: 119925
 2010-11-21 07:05:31 +00:00
Owen Anderson
0ec4da72fc Use by-name rather than by-order operand matching for some NEON encodings. 
llvm-svn: 119923
 2010-11-21 06:47:06 +00:00
Chris Lattner
908a01328c optimize: 
void a(int x) { if (((1<<x)&8)==0) b(); }

into "x != 3", which occurs over 100 times in 403.gcc but in no
other program in llvm-test.

llvm-svn: 119922
 2010-11-21 06:44:42 +00:00
Chris Lattner
09bf382b8f tail calls on x86 are implemented. 
llvm-svn: 119920
 2010-11-21 06:10:27 +00:00
Jim Grosbach
1476bfec1e BR_JTadd is ARM-only, so use the proper pseudo class to get the predicate. 
llvm-svn: 119918
 2010-11-21 01:26:01 +00:00
Rafael Espindola
ee6aea622f Handle PCRel relocations with absolute values. Fixes PR8656. 
llvm-svn: 119917
 2010-11-21 00:48:25 +00:00
Chris Lattner
ba1cc33676 Implement PR8644: forwarding a memcpy value to a byval, 
allowing the memcpy to be eliminated.

Unfortunately, the requirements on byval's without explicit 
alignment are really weak and impossible to predict in the 
mid-level optimizer, so this doesn't kick in much with current
frontends.  The fix is to change clang to set alignment on all
byval arguments.

llvm-svn: 119916
 2010-11-21 00:28:59 +00:00
Chris Lattner
d4da93abb1 a byval argument without an align can have an arbitrary alignment 
requirement on the input pointer.

llvm-svn: 119914
 2010-11-20 23:49:06 +00:00
Bill Wendling
834a3bfb92 A few more thumb instruction MC encodings. 
llvm-svn: 119913
 2010-11-20 22:52:33 +00:00
Eric Christopher
38b8cfea6a Rewrite address handling to use a structure with all the possible address 
mode variables. Handle frame indexes in load/store and allocas again.

llvm-svn: 119912
 2010-11-20 22:38:27 +00:00
Eric Christopher
5a99947b98 STRH only needs the additional operand, not t2STRH. Also invert conditional 
to match the one from the load emitter above.

llvm-svn: 119911
 2010-11-20 22:01:38 +00:00
Benjamin Kramer
9141603779 Simplify code. No change in functionality. 
llvm-svn: 119908
 2010-11-20 18:43:35 +00:00
Frits van Bommel
da0d866809 Test commit: Fix two -Asserts mode warnings in StringMap.h. 
llvm-svn: 119907
 2010-11-20 18:37:24 +00:00
Anton Korobeynikov
e88ba0f100 Make this compile on case-sensitive file systemsw 
llvm-svn: 119905
 2010-11-20 16:14:57 +00:00
Anton Korobeynikov
ff8c52bd51 Move some more hooks to TargetFrameInfo 
llvm-svn: 119904
 2010-11-20 15:59:32 +00:00
Benjamin Kramer
c99bab43c9 Silence Release build warnings about unused functions. 
llvm-svn: 119903
 2010-11-20 15:53:24 +00:00
Francois Pichet
b6059900a7 Disable warning C4291 on MSVC. Caused because class AttributeList provides a non implemented operator delete without a corresponding new. 
llvm-svn: 119902
 2010-11-20 15:39:03 +00:00
Duncan Sands
028cf0619e On X86, MEMBARRIER, MFENCE, SFENCE, LFENCE are not target memory intrinsics, 
so don't claim they are.  They are allocated using DAG.getNode, so attempts
to access MemSDNode fields results in reading off the end of the allocated
memory.  This fixes crashes with "llc -debug" due to debug code trying to
print MemSDNode fields for these barrier nodes (since the crashes are not
deterministic, use valgrind to see this).  Add some nasty checking to try
to catch this kind of thing in the future.

llvm-svn: 119901
 2010-11-20 11:25:00 +00:00
Andrew Trick
3166f72d7a Removing the useless test that I added recently. It was meant as an example, but not complicated enough to merit another test. 
llvm-svn: 119898
 2010-11-20 07:26:51 +00:00
Andrew Trick
189c10021d RABasic fix. Regalloc is responsible for updating block live ins. 
llvm-svn: 119896
 2010-11-20 02:57:05 +00:00