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8342 Commits

Author SHA1 Message Date
Anton Korobeynikov
158f614c67 Do proper book-keeping of offsets and prologue/epilogue code for stack realignment 
llvm-svn: 50163
 2008-04-23 18:21:27 +00:00
Anton Korobeynikov
1f07315f47 If stack realignment is used - incoming args will use EBP as base register and locals - ESP 
llvm-svn: 50162
 2008-04-23 18:21:02 +00:00
Anton Korobeynikov
5079553b9d Eastimate required stack alignment early, so we can decide, whether we will need frame pointer or not 
llvm-svn: 50161
 2008-04-23 18:20:17 +00:00
Anton Korobeynikov
492641d67f Cleanup 
llvm-svn: 50159
 2008-04-23 18:19:23 +00:00
Anton Korobeynikov
87325bfdf5 Simplify 
llvm-svn: 50158
 2008-04-23 18:18:36 +00:00
Anton Korobeynikov
73935826d4 Make stack alignment options global for all targets 
llvm-svn: 50157
 2008-04-23 18:18:10 +00:00
Anton Korobeynikov
6a59c959ca Provide option for enabling-disabling stack realignment 
llvm-svn: 50156
 2008-04-23 18:17:11 +00:00
Anton Korobeynikov
fc59ae78e0 Disable stack realignment for functions with dynamic-sized alloca's 
llvm-svn: 50155
 2008-04-23 18:16:43 +00:00
Anton Korobeynikov
11851230a9 Provide ABI-correct stack alignment 
llvm-svn: 50154
 2008-04-23 18:16:16 +00:00
Anton Korobeynikov
7e6850d1a1 Provide convenient helpers for some operations 
llvm-svn: 50153
 2008-04-23 18:15:48 +00:00
Anton Korobeynikov
71adb49389 Whitespace cleanup 
llvm-svn: 50152
 2008-04-23 18:15:11 +00:00
Dan Gohman
93b5be1824 Implement an x86-64 ABI detail of passing structs by hidden first 
argument. The x86-64 ABI requires the incoming value of %rdi to
be copied to %rax on exit from a function that is returning a
large C struct.

Also, add a README-X86-64 entry detailing the missed optimization
opportunity and proposing an alternative approach.

llvm-svn: 50075
 2008-04-21 23:59:07 +00:00
Dan Gohman
105b523786 Fix the encoding of the MMX movd that moves from MMX to 64-bit GPR. 
llvm-svn: 50053
 2008-04-21 19:52:29 +00:00
Chris Lattner
3117d33f74 Add an ugly note. 
llvm-svn: 50029
 2008-04-21 04:46:30 +00:00
Nicolas Geoffray
036fb2bebf Don't forget to update the current operand when getting the size of an instruction. 
llvm-svn: 50007
 2008-04-20 23:36:47 +00:00
Chris Lattner
2c5b96fbee A better fix for my previous patch, MOVZQI2PQIrr just requires SSE2. 
llvm-svn: 49986
 2008-04-20 05:52:46 +00:00
Chris Lattner
f390d62b7f Switch to using Simplified ConstantFP::get API. 
llvm-svn: 49977
 2008-04-20 00:41:09 +00:00
Evan Cheng
f583b3feb6 64-bit atomic operations. 
llvm-svn: 49949
 2008-04-19 02:30:38 +00:00
Evan Cheng
1c54ebbe2f Also LXCHG64 -> XCHG64rm. 
llvm-svn: 49948
 2008-04-19 02:05:42 +00:00
Evan Cheng
09e77f6b83 PPC32 atomic operations. 
llvm-svn: 49947
 2008-04-19 01:30:48 +00:00
Evan Cheng
b1d240f973 xchg which references a memory operand does not need to lock prefix. Atomicity is guaranteed. 
llvm-svn: 49946
 2008-04-19 01:20:30 +00:00
Dan Gohman
98ca33cb59 Fix the handling of va_copy on x86-64. As of llvm-gcc r49920 
llvm-gcc is now lowering va_copy on x86-64, so this completes
the fix for PR2230.

llvm-svn: 49922
 2008-04-18 20:55:41 +00:00
Evan Cheng
a626e13995 - Fix atomic operation JIT encoding. 
- Remove unused instructions.

llvm-svn: 49921
 2008-04-18 20:55:36 +00:00
Evan Cheng
2b03674feb Also support Intel asm syntax. 
llvm-svn: 49878
 2008-04-17 23:35:10 +00:00
Evan Cheng
0b36ca5023 Fix assembly code for atomic operations. 
llvm-svn: 49869
 2008-04-17 21:26:35 +00:00
Evan Cheng
e2e899b5c2 Don't forget about sub-register indices when rematting instructions. 
llvm-svn: 49830
 2008-04-16 23:44:44 +00:00
Dale Johannesen
d19ab27ee1 Unbreak build on x86-64. 
llvm-svn: 49822
 2008-04-16 22:24:33 +00:00
Nicolas Geoffray
1f3211af01 Correlate stubs with functions in JIT: when emitting a stub, the JIT tells the memory manager which function 
the stub will resolve.

llvm-svn: 49814
 2008-04-16 20:46:05 +00:00
Nicolas Geoffray
82baa2d2c6 Infrastructure for getting the machine code size of a function and an instruction. X86, PowerPC and ARM are implemented 
llvm-svn: 49809
 2008-04-16 20:10:13 +00:00
Evan Cheng
341bed7210 Initialize X863DNowLevel. 
llvm-svn: 49808
 2008-04-16 19:03:02 +00:00
Roman Levenstein
728d59166f Ongoing work on improving the instruction selection infrastructure: 
Rename SDOperandImpl back to SDOperand.
Introduce the SDUse class that represents a use of the SDNode referred by
an SDOperand. Now it is more similar to Use/Value classes.

Patch is approved by Dan Gohman.

llvm-svn: 49795
 2008-04-16 16:15:27 +00:00
Dan Gohman
be8f2b452b Add support for the form of the SSE41 extractps instruction that 
puts its result in a 32-bit GPR.

llvm-svn: 49762
 2008-04-16 02:32:24 +00:00
Dan Gohman
cf79877623 Recreate the size SDNode instead of reusing the old one in the x86 
memcpy lowering code; this ensures that the size node has the desired
result type. This fixes a regression from r49572 with @llvm.memcpy.i64
on x86-32.

llvm-svn: 49761
 2008-04-16 01:32:32 +00:00
Dan Gohman
6f9b55bc7c Remove X86_64SRet; it isn't used anymore. 
llvm-svn: 49759
 2008-04-16 00:24:30 +00:00
Dan Gohman
7d27552962 Add movd instructions to move from MMX registers 
to 64-bit GPR registers on x86-64.

llvm-svn: 49757
 2008-04-15 23:55:07 +00:00
Nicolas Geoffray
7e0110f724 Change Divided flag to Split, as suggested by Evan 
llvm-svn: 49715
 2008-04-15 08:08:50 +00:00
Dan Gohman
77049e31b6 Remove unnecessary <sstream> includes. 
llvm-svn: 49681
 2008-04-14 20:40:47 +00:00
Dan Gohman
8d46278998 Fix const-correctness issues with the SrcValue handling in the 
memory intrinsic expansion code.

llvm-svn: 49666
 2008-04-14 17:55:48 +00:00
Dale Johannesen
edcba1161f Reverse sense of unwind-tables option. This means 
stack tracebacks on Darwin x86-64 won't work by default;
nevertheless, everybody but me thinks this is a good idea.

llvm-svn: 49663
 2008-04-14 17:54:17 +00:00
Nicolas Geoffray
ad5556e8ba Add a divided flag for the first piece of an argument divided into mulitple parts. Fixes PR1643 
llvm-svn: 49611
 2008-04-13 13:40:22 +00:00
Anton Korobeynikov
ea8dbf596a Provide option for stack alignment override 
llvm-svn: 49593
 2008-04-12 22:12:22 +00:00
Arnold Schwaighofer
82af0e6a43 This patch corrects the handling of byval arguments for tailcall 
optimized x86-64 (and x86) calls so that they work (... at least for
my test cases).

Should fix the following problems:

Problem 1: When i introduced the optimized handling of arguments for
tail called functions (using a sequence of copyto/copyfrom virtual
registers instead of always lowering to top of the stack) i did not
handle byval arguments correctly e.g they did not work at all :).

Problem 2: On x86-64 after the arguments of the tail called function
are moved to their registers (which include ESI/RSI etc), tail call
optimization performs byval lowering which causes xSI,xDI, xCX
registers to be overwritten. This is handled in this patch by moving
the arguments to virtual registers first and after the byval lowering
the arguments are moved from those virtual registers back to
RSI/RDI/RCX.

llvm-svn: 49584
 2008-04-12 18:11:06 +00:00
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
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
Dan Gohman
b3a511b236 Make isVectorClearMaskLegal's operand list const. 
llvm-svn: 49446
 2008-04-09 20:09:42 +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
Dale Johannesen
5dcdb08b0d Rename -disable-required-unwind-tables to unwind-tables-optional. 
llvm-svn: 49389
 2008-04-08 18:07:49 +00:00
Dale Johannesen
2d29b1c5bb Handle the situation in 2008-01-25-EmptyFunction.ll 
correctly when unwind info is being generated.

llvm-svn: 49366
 2008-04-08 00:37:56 +00:00
Dale Johannesen
ec0fe04044 Implement new llc flag -disable-required-unwind-tables. 
Corresponds to -fno-unwind-tables (usually default in gcc).

llvm-svn: 49361
 2008-04-08 00:10:24 +00:00
Dan Gohman
d7301ea935 Rename MemOperand to MachineMemOperand. This was suggested by 
review feedback from Chris quite a while ago. No functionality
change.

llvm-svn: 49348
 2008-04-07 19:35:22 +00:00
Roman Levenstein
b40d332929 Re-commit of the r48822, where the infinite looping problem discovered 
by Dan Gohman is fixed.

llvm-svn: 49330
 2008-04-07 10:06:32 +00:00
Gabor Greif
6c6b8a57f3 API changes for class Use size reduction, wave 1. 
Specifically, introduction of XXX::Create methods
for Users that have a potentially variable number of
Uses.

llvm-svn: 49277
 2008-04-06 20:25:17 +00:00
Evan Cheng
4d7b2ab16f Favors pshufd over shufps when shuffling elements from one vector. pshufd is faster than shufps. 
llvm-svn: 49244
 2008-04-05 00:30:36 +00:00
Torok Edwin
a282b19804 strdup needs <cstring>. This fixes a build error with g++-4.3. 
llvm-svn: 49218
 2008-04-04 16:08:00 +00:00
Evan Cheng
0585b4bc2a Re-enable SSE4. 
llvm-svn: 49158
 2008-04-03 08:53:29 +00:00
Evan Cheng
cb5a5467dc Fix x86-64 encoding bug. REX prefix must always follow 0x0F prefix. For example, extractps in 64bit mode: 66 REX 0F 3A 17, not 66 0F 3A REX 17. 
llvm-svn: 49157
 2008-04-03 08:53:17 +00:00
Evan Cheng
12d2bbde0d Cosmetic 
llvm-svn: 49156
 2008-04-03 07:45:18 +00:00
Evan Cheng
f112eb3b1c Temporarily disabling SSE4 until we fix the encoding issues. 
llvm-svn: 49129
 2008-04-03 04:49:54 +00:00
Evan Cheng
497c607fae Backing out 48222 temporarily. 
llvm-svn: 49124
 2008-04-03 03:13:16 +00:00
Dan Gohman
5b2503097e Suppress the 128-bit integer typedef on 32-bit targets, because 
it causes compile errors.

llvm-svn: 49122
 2008-04-02 23:52:49 +00:00
Dan Gohman
4949a9c308 Partial CBackend support for 128-bit integers. This is needed 
now that llvm-gcc is lowering appropriately-sized struct returns
to i128 on x86-64.

llvm-svn: 49109
 2008-04-02 19:40:14 +00:00
Dale Johannesen
84a1314ea1 Cosmetic changes per EH patch review feedback. 
llvm-svn: 49096
 2008-04-02 17:04:45 +00:00
Anton Korobeynikov
d3330dfbf6 Add new CC lowering rule: provide a list of registers, which can be 'shadowed', 
when some another register is used for argument passing.
Currently is used on Win64.

llvm-svn: 49079
 2008-04-02 05:23:57 +00:00
Dale Johannesen
79633a914f Recommitting EH patch; this should answer most of the 
review feedback.
-enable-eh is still accepted but doesn't do anything.
EH intrinsics use Dwarf EH if the target supports that,
and are handled by LowerInvoke otherwise.
The separation of the EH table and frame move data is,
I think, logically figured out, but either one still
causes full EH info to be generated (not sure how to
split the metadata correctly).
MachineModuleInfo::needsFrameInfo is no longer used and
is removed.

llvm-svn: 49064
 2008-04-02 00:25:04 +00:00
Evan Cheng
e1eee9570f ReMat of load from stub in pic mode extends the life of pic base. Currently spiller doesn't do a good job of estimating the impact. Disable for now. 
llvm-svn: 49059
 2008-04-01 23:26:12 +00:00
Evan Cheng
5c98bdbc4f Remove unnecessary and non-deterministic checking code. Re-enable remat of load from gv stub. 
llvm-svn: 49054
 2008-04-01 21:38:20 +00:00
Dan Gohman
a3e01dc1ec Don't use __bzero for memset if the second argument isn't zero. 
llvm-svn: 49050
 2008-04-01 20:56:18 +00:00
Dan Gohman
168b2b1300 Speculatively micro-optimize memory-zeroing calls on Darwin 10. 
llvm-svn: 49048
 2008-04-01 20:38:36 +00:00
Dale Johannesen
8813206b7f Revert 49006 for the moment. 
llvm-svn: 49046
 2008-04-01 20:00:57 +00:00
Evan Cheng
d7f2ac9a0a Disabling remat of load from gv stub (temporarily) again to fix llvmgcc bootstrap miscompare. 
llvm-svn: 49037
 2008-04-01 07:33:13 +00:00
Evan Cheng
a38ae9c502 Unbreak ARM / Thumb soft FP support. 
llvm-svn: 49012
 2008-04-01 01:50:16 +00:00
Dale Johannesen
1336104c02 Accept 'y' constraint (MMX) in inline asm. 
llvm-svn: 49011
 2008-04-01 00:57:48 +00:00
Dale Johannesen
fa4433be71 Emit exception handling info for functions which are 
not marked nounwind, or for all functions when -enable-eh
is set, provided the target supports Dwarf EH.

llvm-gcc generates nounwind in the right places; other FEs
will need to do so also.  Given such a FE, -enable-eh should
no longer be needed.

llvm-svn: 49006
 2008-03-31 23:40:23 +00:00
Evan Cheng
a3ce7b4c76 It's not safe to fold a load from GV stub or constantpool into a two-address use. 
llvm-svn: 49002
 2008-03-31 23:19:51 +00:00
Evan Cheng
38a755499d Move reMaterialize() from TargetRegisterInfo to TargetInstrInfo. 
llvm-svn: 48995
 2008-03-31 20:40:39 +00:00
Evan Cheng
38bfff8a16 Re-apply 48911. 
llvm-svn: 48977
 2008-03-31 07:54:19 +00:00
Nick Lewycky
7d33dc0878 Moved from PR1570. 
llvm-svn: 48965
 2008-03-30 19:07:11 +00:00
Chris Lattner
49e9edd6f6 Fix "Control reaches the end of non-void function" warnings, 
patch by David Chisnall.

llvm-svn: 48963
 2008-03-30 18:22:13 +00:00
Dan Gohman
227e702cae Fix a tokenfactor node to use the load chain rather than the 
load value. This fixes PR2177.

llvm-svn: 48932
 2008-03-28 23:45:16 +00:00
Evan Cheng
10d0aba260 Backing out 48911 for now. It's breaking stuff. 
llvm-svn: 48922
 2008-03-28 17:49:06 +00:00
Evan Cheng
3b54c5fa08 New entry. 
llvm-svn: 48912
 2008-03-28 07:07:06 +00:00
Evan Cheng
d66e48366f Load from stub is already re-materializable. 
llvm-svn: 48911
 2008-03-28 06:49:25 +00:00
Evan Cheng
e66720fd57 Code clean up. 
llvm-svn: 48856
 2008-03-27 01:45:11 +00:00
Evan Cheng
aca67f0b29 Allow certain lea instructions to be rematerialized. 
llvm-svn: 48855
 2008-03-27 01:41:09 +00:00
Evan Cheng
1afaf3092f Remove an unused command line option. 
llvm-svn: 48854
 2008-03-27 01:30:24 +00:00
Roman Levenstein
55b8822511 Use a linked data structure for the uses lists of an SDNode, just like 
LLVM Value/Use does and MachineRegisterInfo/MachineOperand does.
This allows constant time for all uses list maintenance operations.

The idea was suggested by Chris. Reviewed by Evan and Dan.
Patch is tested and approved by Dan.

On normal use-cases compilation speed is not affected. On very big basic
blocks there are compilation speedups in the range of 15-20% or even better. 

llvm-svn: 48822
 2008-03-26 12:39:26 +00:00
Evan Cheng
6323ea8467 Fix some SSE4.1 instruction encoding bugs. 
llvm-svn: 48815
 2008-03-26 08:11:49 +00:00
Dale Johannesen
8c1e95810f Use ## for comment delimiter on darwin x86-32, so 
llvm's output .s files will go through gcc -std=c99
without triggering preprocesser errors.  Approach
suggested by Daveed Vandevoorde.

llvm-svn: 48808
 2008-03-25 23:29:30 +00:00
Evan Cheng
6226a78cb1 Smaller function alignment when optimizing for size. 
llvm-svn: 48805
 2008-03-25 22:29:46 +00:00
Evan Cheng
6ee0633a42 Rename option -optimizefor-size to -optimize-size. 
llvm-svn: 48804
 2008-03-25 22:28:39 +00:00
Dan Gohman
2b96ce84aa Add explicit keywords. 
llvm-svn: 48801
 2008-03-25 22:06:05 +00:00
Dan Gohman
22002efa15 A quick nm audit turned up several fixed tables and objects that were 
marked read-write. Use const so that they can be allocated in a
read-only segment.

llvm-svn: 48800
 2008-03-25 21:45:14 +00:00
Devang Patel
71f3156ea3 Add optimize-for-size knob. 
llvm-svn: 48793
 2008-03-25 21:02:35 +00:00
Dan Gohman
58ad056286 Add CMP32mr and friends to the load-unfolding table. Among 
other things, this allows the scheduler to unfold a load operand
in the 2008-01-08-SchedulerCrash.ll testcase, so it now successfully
clones the comparison to avoid a pushf+popf.

llvm-svn: 48777
 2008-03-25 16:53:19 +00:00
Evan Cheng
3da2a15397 Add \t after .set. Fix by Jay Freeman. 
llvm-svn: 48753
 2008-03-24 23:36:49 +00:00