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20043 Commits

Author SHA1 Message Date
Bill Wendling
dd451b602a Add the PCSymbol for Darwin x86 platforms. 
llvm-svn: 41284
 2007-08-22 18:44:05 +00:00
Devang Patel
797fbef078 Refactor loop condition check in a separate function. 
llvm-svn: 41282
 2007-08-22 18:27:01 +00:00
Devang Patel
7e6f9f4779 Fix thinko. 
Starting value of second loop's induction variable can not be lower 
then starting value of original loop's induction variable.

llvm-svn: 41280
 2007-08-22 18:07:47 +00:00
Devang Patel
60f5256cd1 Rename bunch of variables. 
llvm-svn: 41250
 2007-08-21 21:12:02 +00:00
Devang Patel
4fe5509c7d Preserve LCSSA. 
llvm-svn: 41246
 2007-08-21 19:47:46 +00:00
Devang Patel
b86f1fdb3f Use SmallVector. 
llvm-svn: 41230
 2007-08-21 16:54:51 +00:00
Devang Patel
e92ff0baef No need to hardcode SmallVector size. 
llvm-svn: 41228
 2007-08-21 16:39:43 +00:00
Bruno Cardoso Lopes
14e39d7bcf InlineAsm asm support for integer registers added 
llvm-svn: 41225
 2007-08-21 16:09:25 +00:00
Bruno Cardoso Lopes
4173f973e9 Instruction Itinerary attribution fixed 
llvm-svn: 41224
 2007-08-21 16:06:45 +00:00
Chris Lattner
8e296cc9d9 Fix potentially N^2 behavior handling arrays with many of the 
same value which get RAUW'd.  This speeds up reading the .bc
file in PR1616 from 852s to 0.19s on my G5 with a debug build.

llvm-svn: 41209
 2007-08-21 00:55:23 +00:00
Anton Korobeynikov
f942eb0c45 Use only 1 knob to enable exceptions on Darwin :). 
llvm-svn: 41208
 2007-08-21 00:31:30 +00:00
Devang Patel
f06e667e9c Use SmallVector instead of std::vector. 
llvm-svn: 41207
 2007-08-21 00:31:24 +00:00
Chris Lattner
07ac73b539 simplify code, improve a comment. 
llvm-svn: 41205
 2007-08-21 00:21:07 +00:00
Devang Patel
b64f73f8f0 s/ExitBlock/ExitingBlock/g 
llvm-svn: 41204
 2007-08-20 23:51:18 +00:00
Chris Lattner
401698e8b5 initial checkin of Neil's APFloat work. 
llvm-svn: 41203
 2007-08-20 22:49:32 +00:00
Anton Korobeynikov
4e15adaf04 - Use correct header for SCEV inside LoopPass.cpp 
- Move SCEVExpander::expand() out-of-line workarounding possible toolchain bug

llvm-svn: 41197
 2007-08-20 21:17:26 +00:00
Devang Patel
b6ebf8cbf3 Replace indunction variable with split value in loop body. 
This fixes art miscompile.

llvm-svn: 41195
 2007-08-20 20:49:01 +00:00
Devang Patel
6c91023dad Do not split loops rejected by processOneIterationLoop(). 
llvm-svn: 41194
 2007-08-20 20:24:15 +00:00
Dan Gohman
23db01efea Minor cleanups to reduce some spurious differences between different 
scheduler implementations.

llvm-svn: 41191
 2007-08-20 19:28:38 +00:00
Dan Gohman
908f4e65ed Add Type::isIntOrIntVector, like Type::isFPOrFPVector. 
llvm-svn: 41190
 2007-08-20 19:25:59 +00:00
Dan Gohman
5da3149de5 When Intrinsic::getName is constructing names for overloaded intrinsics, 
use the ValueType name instead of the llvm type name, to match what the
verifier expects. For integers these are the same, but for floating-point
values the intrinsics use f32/f64 instead of float/double.

llvm-svn: 41189
 2007-08-20 19:23:34 +00:00
Rafael Espindola
68d95ff2b1 Partial implementation of calling functions with byval arguments: 
*) The needed information is propagated to the DAG
 *) The X86-64 backend detects it and aborts

llvm-svn: 41179
 2007-08-20 15:18:24 +00:00
Chris Lattner
fdb4d38108 add a note 
llvm-svn: 41178
 2007-08-20 02:14:33 +00:00
Chris Lattner
2de224be98 Fix PR1611 - Visibility should be ignored for a declaration 
when a definition's visibility is different.  Likewise, the
visibility of two declarations mismatching is not an error.

llvm-svn: 41174
 2007-08-19 22:22:54 +00:00
Chris Lattner
a92fddf2cc simplify code and print visibility for declarations. 
llvm-svn: 41173
 2007-08-19 22:15:26 +00:00
Nick Lewycky
3ea7d43047 Oops, remove assert that wasn't meant to be committed. 
llvm-svn: 41170
 2007-08-18 23:21:28 +00:00
Nick Lewycky
125c9f2db3 Never insert duplicate edges. 
llvm-svn: 41169
 2007-08-18 23:18:03 +00:00
Nick Lewycky
9570c4c5ca Typo. 
llvm-svn: 41168
 2007-08-18 15:08:56 +00:00
Chris Lattner
d5f075ed16 Compute the argument list as lazily as possible. This ensures that clients 
that don't use it don't have to pay the memory cost for the arguments.  This
allows us to avoid creating Argument nodes for many prototypes and for clients
who lazily deserialize code from a bytecode file.

llvm-svn: 41166
 2007-08-18 06:14:52 +00:00
Chris Lattner
6e6a77d83b use a nicer accessor. 
llvm-svn: 41165
 2007-08-18 06:13:19 +00:00
Evan Cheng
a65c956119 Fold C ? 0 : 1 to ~C or zext(~C) or trunc(~C) depending the types. 
llvm-svn: 41163
 2007-08-18 05:57:05 +00:00
Bruno Cardoso Lopes
40b9999770 MipsHi now has ouput flag 
MipsAdd SDNode created to add support to an Add opcode which supports input flag
Added an instruction itinerary to all instruction classes
Added branches with zero cond codes
Now call clobbers all non-callee saved registers
Call w/ register support added
Added DelaySlot to branch and load instructions
Added patterns to handle all setcc, brcond/setcc and MipsAdd instructions

llvm-svn: 41161
 2007-08-18 02:37:46 +00:00
Bruno Cardoso Lopes
3bc582fa67 Fixed stack frame addressing bug 
llvm-svn: 41160
 2007-08-18 02:19:09 +00:00
Bruno Cardoso Lopes
15cbbbb56f support for Schedule included on Mips.td 
llvm-svn: 41159
 2007-08-18 02:18:07 +00:00
Bruno Cardoso Lopes
e2909db54c Removed LowerRETURADDR, fixed small bug into LowerRET, LowerGlobalAddress 
fixed to generate instructions (add, lui) glued!

llvm-svn: 41158
 2007-08-18 02:16:30 +00:00
Bruno Cardoso Lopes
d13e0b33d1 Couple of small changes. Delay Slot handle header declared. 
Newline added after macros at function init on generated asm!

llvm-svn: 41157
 2007-08-18 02:05:24 +00:00
Bruno Cardoso Lopes
1ad2687157 Added InstrItinClass support for instruction formats 
llvm-svn: 41156
 2007-08-18 02:01:28 +00:00
Bruno Cardoso Lopes
0dce1a316c Branch Analysis and InsertNoop inserted into header files 
llvm-svn: 41155
 2007-08-18 01:59:45 +00:00
Bruno Cardoso Lopes
ae01dc5e74 createMipsDelaySlotFillerPass added to mips codegen runtime 
llvm-svn: 41154
 2007-08-18 01:58:15 +00:00
Bruno Cardoso Lopes
7bca87bebd Added Branch Analysis support 
Added InsertNoop support

llvm-svn: 41153
 2007-08-18 01:56:48 +00:00
Bruno Cardoso Lopes
c7eaab9c92 LowerRETURNADDR removed since it was wrong and does not have utility yet! 
MipsAdd opcode added

llvm-svn: 41152
 2007-08-18 01:54:09 +00:00
Bruno Cardoso Lopes
d97285f98a InstrItineraryData support on added. 
Added Mips3 ISA feature (needed when supporting R4000 machines)

llvm-svn: 41151
 2007-08-18 01:52:27 +00:00
Bruno Cardoso Lopes
bc755b9969 A Pass to insert Nops on intructions with DelaySlot 
llvm-svn: 41150
 2007-08-18 01:50:47 +00:00
Bruno Cardoso Lopes
d67580757e Mips generic fallback instruction schedule support! 
llvm-svn: 41149
 2007-08-18 01:46:44 +00:00
Devang Patel
17cd20c077 Avoid spliting loops where two split condition branches are not independent. 
llvm-svn: 41148
 2007-08-18 00:00:32 +00:00
Devang Patel
fded73828f When one branch of condition is eliminated then head of the other 
branch is not necessary immediate dominators of merge blcok in all cases.

llvm-svn: 41144
 2007-08-17 21:59:16 +00:00
Evan Cheng
930acafa5b Avoid issue on 64-bit hosts. 
llvm-svn: 41143
 2007-08-17 18:02:22 +00:00
David Greene
1d1b7f793d Fix GLIBCXX_DEBUG error of comparing two singular iterators 
llvm-svn: 41139
 2007-08-17 15:13:55 +00:00
Evan Cheng
11fa8d0f62 If dynamic_stackalloc alignment is > stack alignment, first issue an instruction to align the stack ptr before the decrement. 
llvm-svn: 41133
 2007-08-16 23:50:06 +00:00
Evan Cheng
9a05381a81 - If a dynamic_stackalloc alignment requirement is <= stack alignment, then the alignment argument is ignored. 
- *Always* round up the size of the allocation to multiples of stack
alignment to ensure the stack ptr is never left in an invalid state after a dynamic_stackalloc.

llvm-svn: 41132
 2007-08-16 23:46:29 +00:00
Owen Anderson
5173494693 Factor out some code into a helper function. 
llvm-svn: 41131
 2007-08-16 22:51:56 +00:00
Dan Gohman
644db457f0 Fix the verification for overloaded intrinsic types. Check that they are 
what they're supposed to be before using them.

llvm-svn: 41130
 2007-08-16 22:06:45 +00:00
Owen Anderson
70ac81f489 Add some more comments to GVN. 
llvm-svn: 41129
 2007-08-16 22:02:55 +00:00
Dan Gohman
b499ea1cf6 Add MVT::fAny for overloading intrinsics on floating-point types. 
llvm-svn: 41128
 2007-08-16 21:57:19 +00:00
Owen Anderson
03cbda804e Cache non-local memory dependence analysis. This is a significant compile 
time performance win in most cases.

llvm-svn: 41126
 2007-08-16 21:27:05 +00:00
Chris Lattner
4c6c787315 This adds a bunch of static functions that implement unsigned 
two's complement bignum arithmetic.  They could be used to
implement much of APInt, but the idea is they are enough to
implement APFloat as well, which the current APInt interface
is not suited for.

Patch by Neil Booth!

llvm-svn: 41124
 2007-08-16 15:56:55 +00:00
Reid Spencer
056b656f99 Improve error handling in the linker by: 
1. Eliminate redundant error messages. LinkInFile and LinkInArchive
   already call the error() method in each case so there's no use
   telling the user again that an item couldn't be linked in.

2. Improve the formatting of error messages (separating content).

3. Change the wording for the warning about unrecognized files. Make
   it clear that the file is being ignored.

llvm-svn: 41121
 2007-08-16 07:47:30 +00:00
Evan Cheng
ee277f940b Fix some kill info update bugs; add hidden option -disable-rematerialization to turn off remat for debugging. 
llvm-svn: 41118
 2007-08-16 07:24:22 +00:00
Reid Spencer
3860c113ab Ensure that error messages a propagated from calls to LinkInModule so they get 
reported to the end user.

llvm-svn: 41117
 2007-08-16 07:23:37 +00:00
Lauro Ramos Venancio
9f9e5b3971 Implement FPOWI ExpandOp. 
Fix PR1287.

llvm-svn: 41112
 2007-08-15 22:13:27 +00:00
Anton Korobeynikov
958dcad32d Properly use const qualifiers 
llvm-svn: 41111
 2007-08-15 21:12:30 +00:00
Evan Cheng
f758fa5c35 If the source of a move is in spill slot, the reload may be folded to essentially a load from stack slot. It's ok to mark the stack slot value as available for reuse. But it should not be clobbered since the destination of the move is live. 
llvm-svn: 41109
 2007-08-15 20:20:34 +00:00
Anton Korobeynikov
3094846993 Move ReturnAddrIndex variable to X86MachineFunctionInfo structure. This fixed 
hard to catch bugs with retaddr lowering

llvm-svn: 41104
 2007-08-15 17:12:32 +00:00
Chris Lattner
9fd664292f add a note. 
llvm-svn: 41103
 2007-08-15 16:58:38 +00:00
Devang Patel
423d18e306 Dominance frontier is now required. 
llvm-svn: 41096
 2007-08-15 03:34:53 +00:00
Devang Patel
315ea9c519 Cleanup removeBlocks. 
Use dominance frontier to fixup incoming edges of successor blocks not domianted by DeadBB.
Use df_iterator to walk and delete basic blocks dominated by DeadBB.

llvm-svn: 41095
 2007-08-15 03:31:47 +00:00
Reid Spencer
2cfe29fc0b Remove unneeded header file. 
llvm-svn: 41094
 2007-08-15 03:01:04 +00:00
Devang Patel
b0924a406a Avoid triangle loops. 
llvm-svn: 41093
 2007-08-15 02:14:55 +00:00
Devang Patel
1dd44d7501 Break infinite loop. 
llvm-svn: 41091
 2007-08-14 23:59:17 +00:00
Devang Patel
d39b9d41bb Avoid nested loops at the moment. 
llvm-svn: 41090
 2007-08-14 23:53:57 +00:00
Evan Cheng
70879e8dae - If a def is dead, do not spill it. 
- If the defs of a spilled rematerializable MI are dead after the spill store is deleted, delete
  the def MI as well.

llvm-svn: 41086
 2007-08-14 23:25:37 +00:00
Evan Cheng
f901915207 Fix for PR1596: AdjustCopiesBackFrom() should conservatively check if any of its sub-registers may overlap with the interval of the copy that's being coalesced. 
llvm-svn: 41084
 2007-08-14 23:19:28 +00:00
Evan Cheng
0fbe2a0ec4 If a MI's def is remat as well as spilled, and the store is later deemed dead, mark the def operand as isDead. 
llvm-svn: 41083
 2007-08-14 20:23:13 +00:00
Devang Patel
7ff808f08e Fix dominance frontier update while removing blocks. 
llvm-svn: 41082
 2007-08-14 18:35:57 +00:00
Owen Anderson
b970937b06 Eliminate PHI nodes with constant values during normal GVN processing, even when 
they're not related to eliminating a load.

llvm-svn: 41081
 2007-08-14 18:33:27 +00:00
Owen Anderson
d9a7b61a64 Be more aggressive in pruning unnecessary PHI nodes when doing PHI construction. 
llvm-svn: 41080
 2007-08-14 18:16:29 +00:00
Owen Anderson
c855195b2f Make GVN iterative. 
llvm-svn: 41078
 2007-08-14 18:04:11 +00:00
Owen Anderson
8d15350c4e Fix a case where GVN was failing to return true when it had, in fact, modified 
the function.

llvm-svn: 41077
 2007-08-14 17:59:48 +00:00
Devang Patel
833a8ea187 Assert sooner. Fix wordings. 
llvm-svn: 41075
 2007-08-14 16:53:52 +00:00
Evan Cheng
de24ad8897 If a spilled value is being reused and the use is a kill, that means there are 
no more uses within the MBB and the spilled value isn't live out of the MBB.
Then it's safe to delete the spill store.

llvm-svn: 41069
 2007-08-14 09:11:18 +00:00
Evan Cheng
886c1fe427 If a rematerializable def is not deleted, i.e. it is also spilled, check if the 
spilled value is available for reuse.

llvm-svn: 41067
 2007-08-14 05:42:54 +00:00
Evan Cheng
5b64e19e06 Kill info update bugs. 
llvm-svn: 41064
 2007-08-14 01:56:58 +00:00
Devang Patel
5d8b2b3293 Handle last value assignments. 
llvm-svn: 41063
 2007-08-14 01:30:57 +00:00
Devang Patel
55b6a8f212 StartValue is already calculated. 
llvm-svn: 41062
 2007-08-14 00:15:45 +00:00
Evan Cheng
215f802b75 Re-implement trivial rematerialization. This allows def MIs whose live intervals that are coalesced to be rematerialized. 
llvm-svn: 41060
 2007-08-13 23:45:17 +00:00
Evan Cheng
eef13203e7 Fix a typo pointd out by Maarten ter Huurne. 
llvm-svn: 41059
 2007-08-13 23:27:11 +00:00
Devang Patel
762259ba73 Preserve simple analysis. 
llvm-svn: 41054
 2007-08-13 22:22:13 +00:00
Devang Patel
e3ea62e49a Preserve dominator info. 
llvm-svn: 41053
 2007-08-13 22:13:24 +00:00
Devang Patel
993388b1ee Add methods to erase basic block entry. 
llvm-svn: 41052
 2007-08-13 22:10:29 +00:00
Devang Patel
d1d0316041 If NewBB dominates DestBB then DestBB is not part of NewBB's dominance frontier. 
llvm-svn: 41051
 2007-08-13 21:59:17 +00:00
Chris Lattner
80032c89e6 move assertion into mutex guard, a partial fix for PR1606. 
llvm-svn: 41050
 2007-08-13 20:08:16 +00:00
Dan Gohman
2390ff5060 When x86 addresses matching exceeds its recursion limit, check to 
see if the base register is already occupied before assuming it can be
used. This fixes bogus code generation in the accompanying testcase.

llvm-svn: 41049
 2007-08-13 20:03:06 +00:00
Chris Lattner
7dfec1ee54 Fix PR1607 
llvm-svn: 41048
 2007-08-13 18:42:37 +00:00
Chris Lattner
8674db5fbf Constant fold: getelementptr (i8* inttoptr (i64 1 to i8*), i32 -1) 
Into: inttoptr (i64 0 to i8*)  -> null

This occurs in the example in PR1602.  With this fixed, we now compile
the example in PR1602 into fully "devirtualized" code:

define void @_Z1g1S(%struct.S* noalias  %s) {
entry:        %tmp131415 = getelementptr %struct.S* %s, i32 0, i32 0          ; <i32 (...)***> [#uses=1]        %tmp16 = load i32 (...)*** %tmp131415, align 4          ; <i32 (...)**> [#uses=1]
        %tmp26277 = load i32 (...)** %tmp16             ; <i32 (...)*> [#uses=1]
        %tmp2829 = bitcast i32 (...)* %tmp26277 to void (%struct.S*)*           ; <void (%struct.S*)*> [#uses=1]
        tail call void %tmp2829( %struct.S* %s )
        ret void
}

This still has the vtable dispatch (as required) but does not have any pointer
to method cruft left.

llvm-svn: 41046
 2007-08-13 17:09:08 +00:00
Evan Cheng
54b799dc76 Kill info update bugs. 
llvm-svn: 41043
 2007-08-13 07:12:23 +00:00
Devang Patel
63d1affed8 Split loops and do CFG cleanup. 
llvm-svn: 41029
 2007-08-12 07:02:51 +00:00
Reid Spencer
c71871ba30 Remove unused variables. 
llvm-svn: 41028
 2007-08-12 04:45:36 +00:00
Evan Cheng
3b211635e8 No need to remove dead range from soon-to-be-dead live interval. Its val# may be out of whack. 
llvm-svn: 41024
 2007-08-12 01:26:19 +00:00
Chris Lattner
afb3c33c2a constant fold ptrtoint(inttoptr) with target data when available. This allows 
us to fold the entry block of PR1602 to false instead of:

br i1 icmp eq (i32 and (i32 ptrtoint (void (%struct.S*)* inttoptr (i64
1 to void (%struct.S*)*) to i32), i32 1), i32 0), label %cond_next, label
%cond_true

llvm-svn: 41023
 2007-08-11 23:49:01 +00:00
Chris Lattner
50f25115cd Transform a load from an undef/zero global into an undef/global even if we 
have complex pointer manipulation going on.  This allows us to compile
stuff like this:

__m128i foo(__m128i x){
                static const unsigned int c_0[4] = { 0, 0, 0, 0 };
                __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
                x  = _mm_unpacklo_epi8(x,  v_Zero);
                return x;
}

into:

_foo:
        xorps   %xmm1, %xmm1
        punpcklbw       %xmm1, %xmm0
        ret

llvm-svn: 41022
 2007-08-11 18:48:48 +00:00
Chris Lattner
fedbfd5f47 expand a note 
llvm-svn: 41021
 2007-08-11 18:19:07 +00:00
Chris Lattner
5f098dbbe5 With evan's explicit flag representation, hopefully we will finally be 
able to 3-addressify away stuff like this:

        movl    %ecx, %eax
        decl    %eax

llvm-svn: 41020
 2007-08-11 18:16:46 +00:00
Reid Spencer
da7379cc57 Fix a comment typo noticed by Sandro Magi. 
llvm-svn: 41018
 2007-08-11 15:57:56 +00:00
Bill Wendling
e611c96a3c 64-bit SSSE3 ops that use MMX registers don't require 16-byte alignment. 
Make a 'memop' pattern just for them.

llvm-svn: 41017
 2007-08-11 09:52:53 +00:00
Evan Cheng
8968affb6d Code to maintain kill information during register coalescing. 
llvm-svn: 41016
 2007-08-11 00:59:19 +00:00
Christopher Lamb
7e52a97df5 Use subregs to improve any_extend code generation when feasible. 
llvm-svn: 41013
 2007-08-10 22:22:41 +00:00
Christopher Lamb
450f6815b9 Increase efficiency of sign_extend_inreg by using subregisters for truncation. As the README suggests sign_extend_subreg is selected to (sext(trunc)). 
llvm-svn: 41010
 2007-08-10 21:48:46 +00:00
Christopher Lamb
4e6cae3eae Edit README in light of previous LEA16 commit. 
llvm-svn: 41009
 2007-08-10 21:29:05 +00:00
Christopher Lamb
7196f0d724 Add 2-addr to 3-addr promotion code that allows 32-bit LEA to be used via subregisters when 16-bit LEA is disabled. 
llvm-svn: 41007
 2007-08-10 21:18:25 +00:00
Christopher Lamb
e0c9bd8d2e Move isSubRegOf into MRegisterInfo. Fix a missed move elimination in LowerSubregs and add more debugging output there. 
llvm-svn: 41005
 2007-08-10 21:11:55 +00:00
Devang Patel
fa7277dd34 Do not overuse std::string. Pass around char * directly. 
llvm-svn: 41001
 2007-08-10 18:29:32 +00:00
Devang Patel
c8cff19c2e Clone loop. 
llvm-svn: 40998
 2007-08-10 18:07:13 +00:00
Devang Patel
d412a2a0ed Add utility to clone loops. 
llvm-svn: 40997
 2007-08-10 17:59:47 +00:00
Chris Lattner
de900e3b6c add Value::getNameStart/getNameLen() accessors. 
llvm-svn: 40989
 2007-08-10 15:34:35 +00:00
Dan Gohman
f18e94535f Fix EXTRACT_ELEMENT, EXTRACT_SUBVECTOR, and EXTRACT_VECTOR_ELT to 
use an intptr ValueType instead of i32 for the index operand in
getCopyToParts.

llvm-svn: 40987
 2007-08-10 14:59:38 +00:00
Rafael Espindola
b20b9e985a propagate struct size and alignment of byval arguments to the DAG 
llvm-svn: 40986
 2007-08-10 14:44:42 +00:00
Bill Wendling
d0bee665d3 For kicks, I though it would be fun to use the correct opcode. 
llvm-svn: 40985
 2007-08-10 09:00:17 +00:00
Bill Wendling
55c3dc2409 Adding SSSE3 intrinsics. 
llvm-svn: 40982
 2007-08-10 06:22:27 +00:00
Chris Lattner
de5f6f921a minor simplifications. 
llvm-svn: 40981
 2007-08-10 06:22:25 +00:00
Chris Lattner
bbe3b1dbee avoid copying strings. 
llvm-svn: 40980
 2007-08-10 06:17:04 +00:00
Devang Patel
b1160475fd Remove unncessary duplication. 
llvm-svn: 40979
 2007-08-10 00:59:03 +00:00
Devang Patel
23c5e2dcd3 Calculate exit and start value of true loop and false loop respectively. 
llvm-svn: 40978
 2007-08-10 00:53:35 +00:00
Devang Patel
51da0a465a ExitCondition and Induction variable are loop constraints 
not split condition constraints.

llvm-svn: 40977
 2007-08-10 00:33:50 +00:00
Chris Lattner
202e7f84e9 unbreak the build 
llvm-svn: 40976
 2007-08-09 23:55:17 +00:00
Evan Cheng
0293fe7483 Bug fix. ~1U marks the val# dead. 
llvm-svn: 40975
 2007-08-09 23:14:39 +00:00
Dale Johannesen
21c0eac378 Patch 10 for long double. Doing constants right needs expanding ConstantFP 
to handle values bigger than double.  If we assume host==target and host
long double works correctly, this is not too bad, but we don't want to
have that limitation longterm.  I could implement accepting double
constants as long double or something like that, which would lead to
incorrect codegen with no errors; the more I think about that the worse
it seems.  Rather than do such a hack that would be backed out later,
I'm settling for giving reasonable error messages, for now.

llvm-svn: 40974
 2007-08-09 22:51:36 +00:00
Evan Cheng
3fae8e1c4a Temporarily backing out this change until we know why some dejagnu tests are failing. 
llvm-svn: 40973
 2007-08-09 22:25:35 +00:00
Evan Cheng
a58ebc46dd divb / mulb outputs to ah. Under x86-64 it's not legal to read ah if the instruction requires a rex prefix (i.e. outputs to r8b, etc.). So issue shift right by 8 on AX and then truncate it to 8 bits instead. 
llvm-svn: 40972
 2007-08-09 21:59:35 +00:00
Chris Lattner
3548932573 when we see a unaligned load from an insufficiently aligned global or 
alloca, increase the alignment of the load, turning it into an aligned load.

This allows us to compile:

#include <xmmintrin.h>
__m128i foo(__m128i x){
 static const unsigned int c_0[4] = { 0, 0, 0, 0 };
	  __m128i v_Zero = _mm_loadu_si128((__m128i*)c_0);
  x  = _mm_unpacklo_epi8(x,  v_Zero);
  return x;
}

into:

_foo:
	punpcklbw	_c_0.5944, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,4		# c_0.5944

instead of:

_foo:
	movdqu	_c_0.5944, %xmm1
	punpcklbw	%xmm1, %xmm0
	ret
	.data
	.lcomm	_c_0.5944,16,2		# c_0.5944

llvm-svn: 40971
 2007-08-09 19:05:49 +00:00
Evan Cheng
a822456bed GR16_ sub-register class should be GR8_, not GR8. That is, it should only be 8-bit registers in 32-bit mode. Ditto for GR32_. 
llvm-svn: 40970
 2007-08-09 18:05:17 +00:00
Dale Johannesen
a1340d5916 Update per review comments. 
llvm-svn: 40965
 2007-08-09 17:27:48 +00:00
Owen Anderson
3eba1e8f5c Make NonLocal and None const in the right way. :-) 
llvm-svn: 40961
 2007-08-09 04:42:44 +00:00
Devang Patel
652613b1db Traverse loop blocks' terminators to find split candidates. 
llvm-svn: 40960
 2007-08-09 01:39:01 +00:00
Dale Johannesen
79551baaad long double 9 of N. This finishes up the X86-32 bits 
(constants are still not handled).  Adds ConvertActions
to control fp-to-fp conversions (these are currently
defaulted for all other targets, so no changes there).

llvm-svn: 40958
 2007-08-09 01:04:01 +00:00
Dale Johannesen
6c8f73eac6 Fix arguments for some Altivec instructions. From SWB. 
llvm-svn: 40957
 2007-08-09 00:49:19 +00:00
Scott Michel
86052f49c0 If a target really needs to custom lower constants, it should be allowed 
to do so.

llvm-svn: 40955
 2007-08-08 23:23:31 +00:00
Owen Anderson
3db807751b Add more comments to memdep. 
llvm-svn: 40953
 2007-08-08 22:26:03 +00:00
Devang Patel
30bf54b9d3 Add cost analysis. 
llvm-svn: 40952
 2007-08-08 22:25:28 +00:00
Owen Anderson
d791c9f667 Make memdep fit in 80 cols. 
llvm-svn: 40950
 2007-08-08 22:01:54 +00:00
Devang Patel
ed9b08c44f Preserve dom info while processing one iteration loop. 
llvm-svn: 40947
 2007-08-08 21:39:47 +00:00
Owen Anderson
f988c3ee5c Change the None and NonLocal markers in memdep to be const. 
llvm-svn: 40946
 2007-08-08 21:39:39 +00:00
Devang Patel
a74e533c5e Clear split info. 
llvm-svn: 40944
 2007-08-08 21:18:27 +00:00
Devang Patel
4bd07b86ae Handle multiple split conditions. 
llvm-svn: 40941
 2007-08-08 21:02:17 +00:00
Reid Spencer
e8aa5a5832 Make getSTDIN return null if the standard input is empty, as the header file 
documentation implies and as its uses depend.

llvm-svn: 40939
 2007-08-08 20:01:58 +00:00
Reid Spencer
c5f311aa70 Allow the filename "-" to be a place holder for stdin. This allows directing 
stdin through llvm-ld and llvm-link.

llvm-svn: 40938
 2007-08-08 19:52:29 +00:00
Owen Anderson
04ba98d0f5 Global values also don't undead-ify pointers in our dead alloca's set. 
llvm-svn: 40936
 2007-08-08 19:12:31 +00:00
Owen Anderson
fd772509e9 Make handleEndBlock significantly faster with one trivial improvement, 
and one hack to avoid hitting a bad case when the alias analysis is imprecise.

llvm-svn: 40935
 2007-08-08 18:38:28 +00:00
Owen Anderson
930610cceb Small improvement: if a function doesn't access memory, we don't need to scan 
it for potentially undeading pointers.

llvm-svn: 40933
 2007-08-08 17:58:56 +00:00
Owen Anderson
ecd9348bd6 Add some comments, remove a dead argument, and simplify some control flow. 
No functionality change.

llvm-svn: 40932
 2007-08-08 17:50:09 +00:00
Chris Lattner
a7dce8c173 eliminate redundant conditions from the signless types conversion. 
llvm-svn: 40927
 2007-08-08 16:19:57 +00:00
Chris Lattner
3e94308eb7 Handle functions with no name better. 
llvm-svn: 40926
 2007-08-08 16:07:23 +00:00
Evan Cheng
5227e36428 Adding kill info to val#. 
llvm-svn: 40925
 2007-08-08 07:03:29 +00:00
Chris Lattner
606d5bced1 significantly speed up constant folding of calls (and thus all clients that use 
ConstantFoldInstruction on calls) by avoiding Value::getName().  getName() constructs
and returns an std::string, which does heap allocation stuff.  This slightly speeds up
instcombine.

llvm-svn: 40924
 2007-08-08 06:55:43 +00:00
Chris Lattner
b8959ef7a1 Speed up updateDFSNumbers with two observations: 
1. domtree is a tree, not a graph.  There is no need to avoid revisiting nodes with a set.
2. the worklist can contain the child iterator pointers so we don't get N^2 rescanning of children.

This speeds up updateDFSNumbers significantly, making it basically free.  On the testcase in PR1432,
this speeds up loopsimplify by another 3x, dropping it from the 12th most expensive pass to the to
the 30th. :)  It used to be #1.

llvm-svn: 40923
 2007-08-08 06:24:20 +00:00
Owen Anderson
02298f7388 A few more small cleanups. 
llvm-svn: 40922
 2007-08-08 06:06:02 +00:00
Evan Cheng
02e7fbd7c8 Clean up and bug fix. 
llvm-svn: 40921
 2007-08-08 05:56:18 +00:00
Chris Lattner
65d638a918 reimplement dfs number computation to be significantly faster. This speeds up 
natural loop canonicalization (which does many cfg xforms) by 4.3x, for 
example.  This also fixes a bug in postdom dfnumber computation.

llvm-svn: 40920
 2007-08-08 05:51:24 +00:00
Owen Anderson
a9facda8db First round of cleanups from Chris' feedback. 
llvm-svn: 40919
 2007-08-08 04:52:29 +00:00
Evan Cheng
12d72cc1a0 - Each val# can have multiple kills. 
- Fix some minor bugs related to special markers on val# def. ~0U means
  undefined, ~1U means dead val#.

llvm-svn: 40916
 2007-08-08 03:00:28 +00:00
Devang Patel
62f8bf41c3 Embrace patch review feedback. 
llvm-svn: 40915
 2007-08-08 01:51:27 +00:00
Evan Cheng
b4135e3825 Remove a dead assertion. 
llvm-svn: 40914
 2007-08-08 01:00:21 +00:00
Evan Cheng
0182b495fd - LiveInterval value#'s now have 3 components: def instruction #, 
kill instruction #, and source register number (iff the value# is defined by a
copy).
- Now def instruction # is set for every value#, not just for copy defined ones.
- Update some outdated code related inactive live ranges.
- Kill info not yet set. That's next patch.

llvm-svn: 40913
 2007-08-07 23:49:57 +00:00
Devang Patel
08504a95b0 Fix new compare instruction's signness. Caught by Chris during review. 
llvm-svn: 40912
 2007-08-07 23:17:52 +00:00
Owen Anderson
2c98f8ee3c Don't insert nearly as many redundant phi nodes. 
llvm-svn: 40909
 2007-08-07 23:12:31 +00:00
Dale Johannesen
0ea7df37c4 Fix spelling of mtvscr and mfvscr. 
llvm-svn: 40908
 2007-08-07 23:08:00 +00:00
Dale Johannesen
6b8e91e7e3 Long double patch 8 of N: make it partially work in 
SSE mode (all but conversions <-> other FP types, I think):
>>Do not mark all-80-bit operations as "Requires[FPStack]"
(which really means "not SSE").
>>Refactor load-and-extend to facilitate this.
>>Update comments.
>>Handle long double in SSE when computing FP_REG_KILL.

llvm-svn: 40906
 2007-08-07 20:29:26 +00:00
Devang Patel
92d6834fd7 Use eraseFromParent(). 
llvm-svn: 40903
 2007-08-07 17:45:35 +00:00
David Greene
310b0d7e39 Fix comment typo 
llvm-svn: 40898
 2007-08-07 16:52:03 +00:00
David Greene
7eea029403 Fix GLIBCXX_DEBUG error triggered by incrementing erased iterator. 
llvm-svn: 40897
 2007-08-07 16:44:38 +00:00
David Greene
f0a40d3dc2 Add a missing forward declaration. 
llvm-svn: 40896
 2007-08-07 16:34:05 +00:00
Evan Cheng
8c896cc115 Initial JIT support for ARM by Raul Fernandes Herbster. 
llvm-svn: 40887
 2007-08-07 01:37:15 +00:00
Dale Johannesen
2c35d56edd Long double patch 7 of N, unless I lost count:). 
Last x87 bits for full functionality (not
thoroughly tested, and long doubles do not work
in SSE modes at all - use -mcpu=i486 for now)

llvm-svn: 40886
 2007-08-07 01:17:37 +00:00
Owen Anderson
22d94da65b Clean up a bunch of caching stuff in memdep. This reduces the time to run GVN 
on 403.gcc from ~15s to ~10s.

llvm-svn: 40884
 2007-08-07 00:33:45 +00:00
Devang Patel
228dc09ff6 Begin loop index split pass. 
llvm-svn: 40883
 2007-08-07 00:25:56 +00:00
Owen Anderson
da58c95cd3 Improve the accuracy of memdep for determining the dependencies of loads. 
This brings GVN to parity with GCSE+LoadVN.

llvm-svn: 40882
 2007-08-06 23:26:03 +00:00
Dale Johannesen
92be0d49fb Replace 4-line function with 10-line version per review comment. 
llvm-svn: 40881
 2007-08-06 22:10:35 +00:00
Dale Johannesen
4df87d9305 Move lengthy conditional down 1 level per review comment. 
llvm-svn: 40878
 2007-08-06 21:48:35 +00:00
Dale Johannesen
3ea9879011 Get X86 long double calling convention to work 
(on Darwin, anyway).  Fix some table omissions for
LD arithmetic.

llvm-svn: 40877
 2007-08-06 21:31:06 +00:00
Chris Lattner
789dad3483 regenerate 
llvm-svn: 40875
 2007-08-06 21:00:46 +00:00
Chris Lattner
da9f76e17a Fix PR1577, a crash on invalid bug. 
llvm-svn: 40874
 2007-08-06 21:00:37 +00:00
Chandler Carruth
67d3119773 This resolves a regression of BasicAA which failed to find any memory information for overloaded intrinsics (PR1600). This resolves that issue, and improves the matching scheme to use a BitVector rather than a binary search. 
llvm-svn: 40872
 2007-08-06 20:57:16 +00:00
Nick Lewycky
34cf98c558 It's safe to fold not of fcmp. 
llvm-svn: 40870
 2007-08-06 20:04:16 +00:00
Dale Johannesen
e3f1d06ca0 Make 80-bit store maintain simulated FP stack correctly. 
llvm-svn: 40868
 2007-08-06 19:50:32 +00:00
Nick Lewycky
04447caa7b Let scalar-evolution analyze loops with an unsigned comparison for the exit 
condition. Fixes 1597.

llvm-svn: 40867
 2007-08-06 19:21:00 +00:00
Nick Lewycky
071a2c6a5e Don't assume it's safe to transform a loop just because it's dominated by any 
comparison. Fixes bug 1598.

llvm-svn: 40866
 2007-08-06 18:33:46 +00:00
Chris Lattner
a374edf4a6 Fix a regression compiling 2005-05-11-Popcount-ffs-fls with the CBE, 
introduced by chandler's patch.

llvm-svn: 40864
 2007-08-06 16:36:18 +00:00
Christopher Lamb
8875f43912 Implement review feedback. No functionality change. 
llvm-svn: 40863
 2007-08-06 16:33:56 +00:00
David Greene
02ac5cfce9 Make this code more efficient. 
llvm-svn: 40861
 2007-08-06 15:09:17 +00:00
Chris Lattner
bf64e878e6 remove some dead lines 
llvm-svn: 40859
 2007-08-06 06:21:06 +00:00
Chris Lattner
2c559ed3dc 1. Random tidiness cleanups 
2. Make domtree printing print dfin/dfout #'s
3. Fix the Transforms/LoopSimplify/2004-04-13-LoopSimplifyUpdateDomFrontier.ll failure from last night (in DominanceFrontier::splitBlock).

w.r.t. #3, my patches last night happened to expose the bug, but this 
has been broken since Owen's r35839 patch to LoopSimplify.  The code
was subsequently moved over from LoopSimplify into Dominators, carrying
the latent bug.  Fun stuff.

llvm-svn: 40858
 2007-08-06 06:19:47 +00:00
Reid Spencer
3e54e72ef1 Fix minor doxygen nits. 
llvm-svn: 40854
 2007-08-05 20:06:04 +00:00
Reid Spencer
ac9262072f Silence some warnings from doxygen about @param argument name not matching the 
actual argument name of the documented function.

llvm-svn: 40851
 2007-08-05 19:35:22 +00:00
Reid Spencer
0de4350acf Escape some escapes that confuse doxygen. 
llvm-svn: 40850
 2007-08-05 19:33:11 +00:00
Reid Spencer
5963adc510 Fix a doxygen directive. 
llvm-svn: 40849
 2007-08-05 19:27:01 +00:00
Dale Johannesen
a85f11d870 Long double patch 4 of N: initial x87 implementation. 
Lots of problems yet but some simple things work.

llvm-svn: 40847
 2007-08-05 18:49:15 +00:00
Chris Lattner
bc90e7255f shorten this name 
llvm-svn: 40843
 2007-08-05 18:45:33 +00:00
Chris Lattner
6d8e77a703 at the end of instcombine, explicitly clear WorklistMap. 
This shrinks it down to something small.  On the testcase
from PR1432, this speeds up instcombine from 0.7959s to 0.5000s,
(59%)

llvm-svn: 40840
 2007-08-05 08:47:58 +00:00
Chris Lattner
428a773f45 Upgrade BasicAliasAnalysis::getModRefBehavior to not call Value::getName, 
which dynamically allocates the string result.  This speeds up dse on the
testcase from PR1432 from 0.3781s to 0.1804s (2.1x).

llvm-svn: 40838
 2007-08-05 07:50:06 +00:00
Chris Lattner
10db9656ba When clearing a SmallPtrSet, if the set had a huge capacity, but the 
contents of the set were small, deallocate and shrink the set.  This
avoids having us to memset as much data, significantly speeding up
some pathological cases.  For example, this speeds up the verifier
from 0.3899s to 0.0763 (5.1x) on the testcase from PR1432 in a 
release build.

llvm-svn: 40837
 2007-08-05 07:32:14 +00:00
Chris Lattner
4b65325ba7 Fix an iterator invalidation bug I induced. 
llvm-svn: 40830
 2007-08-05 00:24:30 +00:00
Chris Lattner
7cdaff2298 Switch some std::sets to SmallPtrSet. This speeds up 
domtree by 10% and postdomtree by 17%

llvm-svn: 40829
 2007-08-05 00:15:57 +00:00
Chris Lattner
9c1a2dfa53 Switch DomTreeNode::assignDFSNumber from using a std::set to using 
a smallptrset.  This speeds up domtree by about 15% and postdomtree by 20%.

llvm-svn: 40828
 2007-08-05 00:10:08 +00:00
Chris Lattner
a5a692b9bb Switch the internal "Info" map from an std::map to a DenseMap. This 
speeds up idom by about 45% and postidom by about 33%.

Some extra precautions must be taken not to invalidate densemap iterators.

llvm-svn: 40827
 2007-08-05 00:02:00 +00:00
Chris Lattner
5912537997 switch the DomTreeNodes and IDoms maps in idom/postidom to a 
DenseMap instead of an std::map.  This speeds up postdomtree
by about 25% and domtree by about 23%.  It also speeds up clients,
for example, domfrontier by 11%, mem2reg by 4% and ADCE by 6%.

llvm-svn: 40826
 2007-08-04 23:48:07 +00:00
Chris Lattner
e562e9bdb0 rewrite the code used to construct pruned SSA form with the IDF method. 
In the old way, we computed and inserted phi nodes for the whole IDF of 
the definitions of the alloca, then computed which ones were dead and
removed them.

In the new method, we first compute the region where the value is live,
and use that information to only insert phi nodes that are live.  This
eliminates the need to compute liveness later, and stops the algorithm
from inserting a bunch of phis which it then later removes.

This speeds up the testcase in PR1432 from 2.00s to 0.15s (14x) in a
release build and 6.84s->0.50s (14x) in a debug build.

llvm-svn: 40825
 2007-08-04 22:50:14 +00:00
Chris Lattner
b7d4ef6ca6 Factor out a whole bunch of code into it's own method. 
llvm-svn: 40824
 2007-08-04 21:14:29 +00:00
Chris Lattner
d4a88d77d4 Use getNumPreds(BB) instead of computing them manually. This is a very small but 
measurable speedup.

llvm-svn: 40823
 2007-08-04 21:06:15 +00:00
Chris Lattner
6b9dca62dd Change the rename pass to be "tail recursive", only adding N-1 successors 
to the worklist, and handling the last one with a 'tail call'.  This speeds
up PR1432 from 2.0578s to 2.0012s (2.8%)

llvm-svn: 40822
 2007-08-04 20:40:27 +00:00
Chris Lattner
c1d2c2bdc8 cache computation of #preds for a BB. This speeds up 
mem2reg from 2.0742->2.0522s on PR1432.

llvm-svn: 40821
 2007-08-04 20:24:50 +00:00
Chris Lattner
8335a86536 reserve operand space for phi nodes when we insert them. 
llvm-svn: 40820
 2007-08-04 20:14:34 +00:00
Chris Lattner
32d9e4ba5c use continue to avoid nesting, no functionality change. 
llvm-svn: 40819
 2007-08-04 20:07:06 +00:00
Chris Lattner
a97ceae263 Promoting allocas with the 'single store' fastpath is 
faster than with the 'local to a block' fastpath.  This speeds
up PR1432 from 2.1232 to 2.0686s (2.6%)

llvm-svn: 40818
 2007-08-04 20:03:23 +00:00
Chris Lattner
479e3fa267 When PromoteLocallyUsedAllocas promoted allocas, it didn't remember 
to increment NumLocalPromoted, and didn't actually delete the
dead alloca, leading to an extra iteration of mem2reg.

llvm-svn: 40817
 2007-08-04 20:01:43 +00:00
Chris Lattner
bd506a8e12 std::map -> DenseMap 
llvm-svn: 40816
 2007-08-04 19:52:20 +00:00
Nick Lewycky
4e96222245 Clean up comments, fix up some confusing code logic. 
Predsimplify fails llvm-gcc bootstrap.

llvm-svn: 40815
 2007-08-04 18:45:32 +00:00
Chris Lattner
9748fa5c6f fix a logic bug where we wouldn't promote single store allocas if the 
stored value was a non-instruction value.  Doh.

This increase the # single store allocas from 8982 to 9026, and
speeds up mem2reg on the testcase in PR1432 from 2.17 to 2.13s.

llvm-svn: 40813
 2007-08-04 02:45:02 +00:00
Chris Lattner
3f971fdbd5 When we do the single-store optimization, delete both the store 
and the alloca so they don't get reprocessed.

This speeds up PR1432 from 2.20s to 2.17s.

llvm-svn: 40812
 2007-08-04 02:38:38 +00:00
Chris Lattner
c38b2a2473 Three improvements: 
1. Check for revisiting a block before checking domination, which is faster.
  2. If the stored value isn't an instruction, we don't have to check for domination.
  3. If we have a value used in the same block more than once, make sure to remove the
     block from the UsingBlocks vector.  Not doing so forces us to go through the slow
     path for the alloca.

The combination of these improvements increases the number of allocas on the fastpath
from 8935 to 8982 on PR1432.  This speeds it up from 2.90s to 2.20s (31%)

llvm-svn: 40811
 2007-08-04 02:32:22 +00:00
Chris Lattner
fe6a3e2fb4 switch from using a std::set to using a SmallPtrSet. This speeds up the 
testcase in PR1432 from 6.33s to 2.90s (2.22x)

llvm-svn: 40810
 2007-08-04 02:21:22 +00:00
Chris Lattner
9b45ad1f5c In mem2reg, when handling the single-store case, make sure to remove 
a using block from the list if we handle it.  Not doing this caused us
to not be able to promote (with the fast path) allocas which have uses (whoops).

This increases the # allocas hitting this fastpath from 4042 to 8935 on the
testcase in PR1432, speeding up mem2reg by 2.6x

llvm-svn: 40809
 2007-08-04 02:15:24 +00:00
Chandler Carruth
d76683caee Regenerating. 
llvm-svn: 40808
 2007-08-04 01:56:21 +00:00
Chandler Carruth
00e56b0e81 This is the patch to provide clean intrinsic function overloading support in LLVM. It cleans up the intrinsic definitions and generally smooths the process for more complicated intrinsic writing. It will be used by the upcoming atomic intrinsics as well as vector and float intrinsics in the future. 
This also changes the syntax for llvm.bswap, llvm.part.set, llvm.part.select, and llvm.ct* intrinsics. They are automatically upgraded by both the LLVM ASM reader and the bitcode reader. The test cases have been updated, with special tests added to ensure the automatic upgrading is supported.

llvm-svn: 40807
 2007-08-04 01:51:18 +00:00
Chris Lattner
b5af2cf90d split rewriting of single-store allocas into its own 
method.

llvm-svn: 40806
 2007-08-04 01:47:41 +00:00
Chris Lattner
f8b22a3568 refactor some code to shrink PromoteMem2Reg::run a bit 
llvm-svn: 40805
 2007-08-04 01:41:18 +00:00
Chris Lattner
2d4d557c80 add a typedef, no other change. 
llvm-svn: 40804
 2007-08-04 01:19:38 +00:00
Chris Lattner
65181deba3 avoid an unneeded vector copy. This speeds up mem2reg on the testcase 
in PR1432 by 6%

llvm-svn: 40803
 2007-08-04 01:07:49 +00:00
Chris Lattner
34cf111957 make RenamePassWorkList a local var instead of an ivar. 
llvm-svn: 40802
 2007-08-04 01:04:40 +00:00
Dale Johannesen
c8462173c5 Make x86 long double alignment 32 for everything but 
Darwin (which makes size within a struct==96)

llvm-svn: 40796
 2007-08-03 22:46:15 +00:00
Dale Johannesen
976a1cf6cf long double patch 3 of N. Add to MVT. 
llvm-svn: 40793
 2007-08-03 20:51:37 +00:00
Dale Johannesen
4b91728849 long double patch 2 of N. Handle it in TargetData. 
(I've tried to get the info right for all targets,
but I'm not expert on all of them - check yours.)

llvm-svn: 40792
 2007-08-03 20:20:50 +00:00
Owen Anderson
891f5b4d28 Fix a subtle miscompilation. This allows 197.parser to be compiled correctly. 
llvm-svn: 40791
 2007-08-03 19:59:35 +00:00
Owen Anderson
d1063b7a3c Fix a subtle iterator invalidation bug in a recursive algorithm. 
llvm-svn: 40776
 2007-08-03 11:03:26 +00:00
Dale Johannesen
dda00eb44d Long double, part 1 of N. Support in IR. 
llvm-svn: 40774
 2007-08-03 01:03:46 +00:00
Chris Lattner
a9026e5f12 add an observation 
llvm-svn: 40772
 2007-08-03 00:17:42 +00:00
Chris Lattner
cf6dd53ad8 Fix an accidental commit. 
llvm-svn: 40758
 2007-08-02 21:33:36 +00:00
Dan Gohman
352de5aeb9 More explicit keywords. 
llvm-svn: 40757
 2007-08-02 21:21:54 +00:00
Dan Gohman
1afde4166e Fix the alignment requirements of several unpck and shuf instructions. 
Generalize isPSHUFDMask and add a unary SHUFPD pattern so that SHUFPD's
memory operand alignment can be tested as well, with a fix to avoid
breaking MMX's use of isPSHUFDMask.

llvm-svn: 40756
 2007-08-02 21:17:01 +00:00
Dan Gohman
7d1e35e6d1 Fix pastos in vector arithmetic intrinsics. 
llvm-svn: 40754
 2007-08-02 21:06:40 +00:00
Owen Anderson
414247c075 Fix 80 col. violations. 
llvm-svn: 40751
 2007-08-02 18:20:52 +00:00
Owen Anderson
ad74eeed3d Fix 80 col. violations. 
llvm-svn: 40750
 2007-08-02 18:16:06 +00:00
Owen Anderson
ae769ac824 Fix 80 col. violations. 
llvm-svn: 40749
 2007-08-02 18:11:11 +00:00
Chris Lattner
9319dfc93a don't redefine a parameter 
llvm-svn: 40748
 2007-08-02 18:08:16 +00:00
Owen Anderson
d617e4c963 Fix a bug that was causing several miscompilations on SPEC. 
llvm-svn: 40746
 2007-08-02 17:56:05 +00:00
Christopher Lamb
f27d856acd Implement review feedback. 
llvm-svn: 40745
 2007-08-02 17:52:00 +00:00
Chris Lattner
5ca7348fc4 Replacing a cast with another one does not reduce the number of 
casts in the input.

llvm-svn: 40741
 2007-08-02 17:23:38 +00:00
Chris Lattner
7c6e8f735f Disable an xform that causes an infinite loop. This fixes PR1594 
llvm-svn: 40739
 2007-08-02 16:56:32 +00:00
Chris Lattner
25a8bfdedb wrap some long lines. Major offenders that are left include 
gvn, gvnpre, dse, and predsimplify.  To see these, use:

  make check-line-length

llvm-svn: 40738
 2007-08-02 16:53:43 +00:00
Devang Patel
937b07fb5e Update dominator info for the middle blocks created while spliting 
exit edge to preserve LCSSA.

Fix dominance frontier update during loop unswitch. This fixes PR 1589, again

llvm-svn: 40737
 2007-08-02 15:25:57 +00:00
Dan Gohman
a599a813d5 Mark the SSE and MMX load instructions that 
X86InstrInfo::isReallyTriviallyReMaterializable knows how to handle
with the isReMaterializable flag so that it is given a chance to handle
them. Without hoisting constant-pool loads from loops this isn't very
visible, though it does keep CodeGen/X86/constant-pool-remat-0.ll from
making a copy of the constant pool on the stack.

llvm-svn: 40736
 2007-08-02 14:27:55 +00:00
Chris Lattner
0111f62050 Enhance instcombine to be more aggressive about folding casts of 
operations of casts.  This implements InstCombine/zext-fold.ll

llvm-svn: 40726
 2007-08-02 06:11:14 +00:00