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Author SHA1 Message Date
Dan Gohman
15edbf989f Drop ISD::MEMSET, ISD::MEMMOVE, and ISD::MEMCPY, which are not Legal 
on any current target and aren't optimized in DAGCombiner. Instead
of using intermediate nodes, expand the operations, choosing between
simple loads/stores, target-specific code, and library calls,
immediately.

Previously, the code to emit optimized code for these operations
was only used at initial SelectionDAG construction time; now it is
used at all times. This fixes some cases where rep;movs was being
used for small copies where simple loads/stores would be better.

This also cleans up code that checks for alignments less than 4;
let the targets make that decision instead of doing it in
target-independent code. This allows x86 to use rep;movs in
low-alignment cases.

Also, this fixes a bug that resulted in the use of rep;stos for
memsets of 0 with non-constant memory size when the alignment was
at least 4. It's better to use the library in this case, which
can be significantly faster when the size is large.

This also preserves more SourceValue information when memory
intrinsics are lowered into simple loads/stores.

llvm-svn: 49572
 2008-04-12 04:36:06 +00:00
Dan Gohman
41f9d24d52 Fix a bug that prevented x86-64 from using rep.movsq for 
8-byte-aligned data.

llvm-svn: 49571
 2008-04-12 02:35:39 +00:00
Nate Begeman
81586b24d6 80 col fix 
llvm-svn: 49569
 2008-04-12 00:47:57 +00:00
Nate Begeman
17ad231324 Restore code to disable crash catcher on older OS X systems 
llvm-svn: 49568
 2008-04-12 00:47:46 +00:00
Evan Cheng
37eb9de565 Add debugging code. 
llvm-svn: 49566
 2008-04-12 00:22:01 +00:00
Chris Lattner
08453a5234 Reenable JIT symbol table. 
llvm-svn: 49548
 2008-04-11 18:11:56 +00:00
Evan Cheng
27262ddcf3 Do not add empty live intervals to handled_. They should never be undone for backtracking. 
llvm-svn: 49544
 2008-04-11 17:55:47 +00:00
Evan Cheng
6e52146f16 If a PHI node has a single implicit_def source, replace it with an implicit_def instead of a copy. 
llvm-svn: 49543
 2008-04-11 17:54:45 +00:00
Evan Cheng
b389b78462 Use of implicit_def is not part of live interval. Create empty intervals for the uses when the live interval is being spilled. 
llvm-svn: 49542
 2008-04-11 17:53:36 +00:00
Devang Patel
13b2e01d4a Change llvm tools install location. 
llvm-svn: 49540
 2008-04-11 17:45:39 +00:00
Chris Lattner
01e31663c8 improvements for IntrusiveRefCntPtr, patch by Mikhail Glushenkov 
llvm-svn: 49538
 2008-04-11 16:42:06 +00:00
Duncan Sands
0aa1fc7829 The Ada front-end from the LLVM 2.2 release 
cannot be build with GNAT GPL 2006, only with
GNAT GPL 2005.

llvm-svn: 49529
 2008-04-11 13:24:43 +00:00
Gabor Greif
f6552899f9 detabify 
llvm-svn: 49524
 2008-04-11 09:34:57 +00:00
Owen Anderson
15e930588a Add testcase for PR2213. 
llvm-svn: 49517
 2008-04-11 05:13:32 +00:00
Owen Anderson
f55bae07b7 Fix PR2213 by simultaneously making GVN more aggressive with the return values 
of calls and less aggressive with non-readnone calls.

llvm-svn: 49516
 2008-04-11 05:11:49 +00:00
Evan Cheng
56ca7e285a New test. 
llvm-svn: 49514
 2008-04-10 23:49:09 +00:00
Evan Cheng
478e43e7a5 Remove implicit_def instructions that become dead as result of coalescing. 
llvm-svn: 49513
 2008-04-10 23:48:35 +00:00
Evan Cheng
52208a738f Allow registers defined by implicit_def to be clobbered. 
llvm-svn: 49512
 2008-04-10 23:47:53 +00:00
Dan Gohman
9c8e4ef9a9 Fix a typo in a comment. 
llvm-svn: 49504
 2008-04-10 23:02:38 +00:00
Dan Gohman
aa52f1c5b0 Fix a typo in a comment. 
llvm-svn: 49502
 2008-04-10 22:27:06 +00:00
Owen Anderson
392a40e40a Fix for PR2190. Memdep's non-local caching was checking dirtied blocks in the 
wrong order.

llvm-svn: 49499
 2008-04-10 22:13:32 +00:00
Dan Gohman
26c2127be9 Make several symbols static. 
llvm-svn: 49496
 2008-04-10 21:11:47 +00:00
Dan Gohman
318d9a6605 Teach InstCombine's ComputeMaskedBits to handle pointer expressions 
in addition to integer expressions. Rewrite GetOrEnforceKnownAlignment
as a ComputeMaskedBits problem, moving all of its special alignment
knowledge to ComputeMaskedBits as low-zero-bits knowledge.

Also, teach ComputeMaskedBits a few basic things about Mul and PHI
instructions.

This improves ComputeMaskedBits-based simplifications in a few cases,
but more noticeably it significantly improves instcombine's alignment
detection for loads, stores, and memory intrinsics.

llvm-svn: 49492
 2008-04-10 18:43:06 +00:00
Evan Cheng
6f164e3814 A copy instruction may use a register multiple times on some targets. Change them all. 
llvm-svn: 49491
 2008-04-10 18:38:47 +00:00
Evan Cheng
c79e80c679 Add comment. 
llvm-svn: 49469
 2008-04-10 08:03:14 +00:00
Chris Lattner
9f994482f5 add a note, this is actually not too bad to implement. 
llvm-svn: 49466
 2008-04-10 05:54:50 +00:00
Chris Lattner
869325c4c4 move the x86-32 part of PR2108 here. 
llvm-svn: 49465
 2008-04-10 05:37:47 +00:00
Chris Lattner
3b289289a7 Fix the x86-64 side of PR2108 by adding a v2f64 version of 
MOVZQI2PQIrr.  This would be better handled as a dag combine 
(with the goal of eliminating the bitconvert) but I don't know
how to do that safely.  Thoughts welcome.

llvm-svn: 49463
 2008-04-10 05:13:43 +00:00
Chris Lattner
da0c256cab produce an error on invalid input instead of asserting: 
def : Pat<((v2f64 (vector_shuffle immAllZerosV_bc,
           ^

llvm-svn: 49462
 2008-04-10 04:48:34 +00:00
Evan Cheng
1803e20a62 Teach branch folding pass about implicit_def instructions. Unfortunately we can't just eliminate them since register scavenger expects every register use to be defined. However, we can delete them when there are no intra-block uses. Carefully removing some implicit def's which enable more blocks to be optimized away. 
llvm-svn: 49461
 2008-04-10 02:32:10 +00:00
Chris Lattner
0bd4d7eef1 Disable an xform we've had for a long time, pow(x,0.5) -> sqrt. 
This is not safe for all inputs.

llvm-svn: 49458
 2008-04-10 02:07:51 +00:00
Evan Cheng
c0aac87374 Move memcpy / memset optimization pass after GVN. 
llvm-svn: 49457
 2008-04-10 01:33:05 +00:00
Evan Cheng
def576f9e6 - More aggressively coalescing away copies whose source is defined by an implicit_def. 
- Added insert_subreg coalescing support.

llvm-svn: 49448
 2008-04-09 20:57:25 +00:00
Dan Gohman
b3a511b236 Make isVectorClearMaskLegal's operand list const. 
llvm-svn: 49446
 2008-04-09 20:09:42 +00:00
Dan Gohman
b05ea92f80 Fix some minor errors in comments. 
llvm-svn: 49445
 2008-04-09 20:08:06 +00:00
Dan Gohman
0586403622 Add const qualifiers. 
llvm-svn: 49443
 2008-04-09 18:31:41 +00:00
Dan Gohman
f03c4d87c0 Update comments to use 2.0 syntax type names. 
llvm-svn: 49442
 2008-04-09 18:24:25 +00:00
Dan Gohman
f4cd5a4801 Add XMM1 as a second return value register for f32 and f64 on x86-64. This 
is needed for the x86-64-ABI handling of structs that contain floating-point
members that are returned by value.

llvm-svn: 49441
 2008-04-09 17:54:37 +00:00
Dan Gohman
9f7c4f6e16 Add DX as a second return value register for i16 on x86. 
llvm-svn: 49440
 2008-04-09 17:53:38 +00:00
Chris Lattner
be01a5f699 Generalize getUnaryFloatFunction to handle any FP unary function, automatically 
figuring out the suffix to use.  implement pow(2,x) -> exp2(x).

llvm-svn: 49437
 2008-04-09 17:48:11 +00:00
Chris Lattner
5d0cbe7d22 remove capital letter from test name. 
llvm-svn: 49436
 2008-04-09 17:46:36 +00:00
Chris Lattner
0eb93cf8d0 use the new ConstantFP::get method to make this work with 
long double and simplify the code.

llvm-svn: 49435
 2008-04-09 17:17:35 +00:00
Chris Lattner
02cc33d0ad ConstantFP::get should be static. 
llvm-svn: 49434
 2008-04-09 17:16:28 +00:00
Nate Begeman
41d0309ce8 Fix a bug where an incorrect bit mask would be generated if a target's last asm 
string began at a power of 2 in the string index.  For example, if "ret" started
at position 16, the ret instruction would be assigned code 16, but the mask would be AsmChars[] + Code & 15, not Code & 31.

llvm-svn: 49433
 2008-04-09 16:24:11 +00:00
Devang Patel
47b4a18b75 Be conservative if getresult operand is neither call nor invoke. 
llvm-svn: 49430
 2008-04-09 15:58:24 +00:00
Owen Anderson
ca7e0e21f3 Factor a bunch of functionality related to memcpy and memset transforms out of 
GVN and into its own pass.

llvm-svn: 49419
 2008-04-09 08:23:16 +00:00
Owen Anderson
0d844f6205 Remove accidentally duplicated code. 
llvm-svn: 49418
 2008-04-09 07:55:01 +00:00
Evan Cheng
94983505c5 Unbreak teh build. 
llvm-svn: 49417
 2008-04-09 07:06:01 +00:00
Chris Lattner
843ee88189 add a simplified accessor for creating an fp constant of a 
particular value but variable type.

llvm-svn: 49416
 2008-04-09 06:38:30 +00:00
Evan Cheng
f35cc57821 Missed a hasInterval check. 
llvm-svn: 49415
 2008-04-09 01:30:15 +00:00