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267 Commits

Author SHA1 Message Date
Eli Friedman
cb60e2293f Make fast-isel work correctly s/uadd.with.overflow intrinsics. 
llvm-svn: 131420
 2011-05-16 21:06:17 +00:00
Eli Friedman
bd237ec411 Fix silly typo. 
llvm-svn: 131419
 2011-05-16 20:34:53 +00:00
Eli Friedman
5f1b7e4153 Basic fast-isel of extractvalue. Not too helpful on its own, given the IR clang generates for cases like this, but it should become more useful soon. 
llvm-svn: 131417
 2011-05-16 20:27:46 +00:00
Eli Friedman
559f908ca7 Fix a FIXME by moving the fast-isel implementation of the objectsize intrinsic from the x86 code to the generic code. 
llvm-svn: 131332
 2011-05-14 00:47:51 +00:00
Owen Anderson
35f6bae989 Allow FastISel of three-register-operand instructions. 
llvm-svn: 130934
 2011-05-05 17:59:04 +00:00
Eli Friedman
919bf1ca71 Make FastEmit_ri_ try a bit harder to succeed for supported operations; FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. 
llvm-svn: 130560
 2011-04-29 23:34:52 +00:00
Eli Friedman
86181251f3 Fix a silly mistake in r130338. 
llvm-svn: 130360
 2011-04-28 00:42:03 +00:00
Eli Friedman
c5406cdb50 Make the fast-isel code for literal 0.0 a bit shorter/faster, since 0.0 is common. rdar://problem/9303592 . 
llvm-svn: 130338
 2011-04-27 22:41:55 +00:00
Eli Friedman
fc1152d772 Remove unused function. 
llvm-svn: 130337
 2011-04-27 22:21:02 +00:00
Dan Gohman
fbb7ade7ae Fast-isel support for simple inline asms. 
llvm-svn: 130205
 2011-04-26 17:18:34 +00:00
Owen Anderson
e1b33b92a3 Teach FastISel to deal with instructions that have two immediate operands. 
llvm-svn: 130033
 2011-04-22 23:38:06 +00:00
Chris Lattner
f15db6c86f Implement support for x86 fastisel of small fixed-sized memcpys, which are generated 
en-mass for C++ PODs.  On my c++ test file, this cuts the fast isel rejects by 10x 
and shrinks the generated .s file by 5%

llvm-svn: 129755
 2011-04-19 05:52:03 +00:00
Chris Lattner
f8f4d3c30a while we're at it, handle 'sdiv exact' of a power of 2 also, 
this fixes a few rejects on c++ iterator loops.

llvm-svn: 129694
 2011-04-18 07:00:40 +00:00
Chris Lattner
dd2f1ec77c fix rdar://9297011 - udiv by power of two causing fast-isel rejects 
llvm-svn: 129693
 2011-04-18 06:55:51 +00:00
Chris Lattner
28eaf6be7f 1. merge fast-isel-shift-imm.ll into fast-isel-x86-64.ll 
2. implement rdar://9289501 - fast isel should fold trivial multiplies to shifts
3. teach tblgen to handle shift immediates that are different sizes than the 
   shifted operands, eliminating some code from the X86 fast isel backend.
4. Have FastISel::SelectBinaryOp use (the poorly named) FastEmit_ri_ function
   instead of FastEmit_ri to simplify code.

llvm-svn: 129666
 2011-04-17 20:23:29 +00:00
Chris Lattner
cb194276e0 fix rdar://9289583 - fast isel should handle non-canonical commutative binops 
allowing us to fold the immediate into the 'and' in this case:

int test1(int i) {
  return 8&i;
}

llvm-svn: 129653
 2011-04-17 01:16:47 +00:00
Chris Lattner
0304b82f80 Fix a ton of comment typos found by codespell. Patch by 
Luis Felipe Strano Moraes!

llvm-svn: 129558
 2011-04-15 05:18:47 +00:00
Jay Foad
0d5ca4cf44 Don't include Operator.h from InstrTypes.h. 
llvm-svn: 129271
 2011-04-11 09:35:34 +00:00
Owen Anderson
78afadfa5d Teach FastISel to support register-immediate-immediate instructions. 
llvm-svn: 127496
 2011-03-11 21:33:55 +00:00
Devang Patel
6fe7fe8dd4 If dbg_declare() or dbg_value() is not lowered by isel then emit DEBUG message instead of creating DBG_VALUE for undefined value in reg0. 
llvm-svn: 121059
 2010-12-06 22:39:26 +00:00
Wesley Peck
d589353ad0 Renaming ISD::BIT_CONVERT to ISD::BITCAST to better reflect the LLVM IR concept. 
llvm-svn: 119990
 2010-11-23 03:31:01 +00:00
Devang Patel
632686ac96 Use frame index, if available for byval argument while lowering dbg_declare. Otherwise let getRegForValue() find register for this argument. 
llvm-svn: 113843
 2010-09-14 20:29:31 +00:00
Devang Patel
346f59b31c Add DEBUG message. 
llvm-svn: 113614
 2010-09-10 20:32:09 +00:00
Eric Christopher
2bf87a1c77 Fix typo. 
llvm-svn: 111223
 2010-08-17 01:30:33 +00:00
Gabor Greif
96a9f8c7c6 mass elimination of reliance on automatic iterator dereferencing 
llvm-svn: 109103
 2010-07-22 13:36:47 +00:00
Dan Gohman
28f747a608 After a custom inserter, in a block which has constant instructions, 
update the current basic block in addition to the current insert
position, so that they remain consistent. This fixes rdar://8204072.

llvm-svn: 108765
 2010-07-19 22:48:56 +00:00
Dan Gohman
444c76a3b1 Revert r108369, sorting llvm.dbg.declare information by source position, 
since it doesn't work for front-ends which don't emit column information
(which includes llvm-gcc in its present configuration), and doesn't
work for clang for K&R style variables where the variables are declared
in a different order from the parameter list.

Instead, make a separate pass through the instructions to collect the
llvm.dbg.declare instructions in order. This ensures that the debug
information for variables is emitted in this order.

llvm-svn: 108538
 2010-07-16 17:54:27 +00:00
Dan Gohman
9589865567 Properly restore DebugLoc after leaving the local constant area. 
llvm-svn: 108364
 2010-07-14 22:01:31 +00:00
Dan Gohman
8e01a639c0 Delete fast-isel's trivial load optimization; it breaks debugging because 
it can look past points where a debugger might modify user variables.

llvm-svn: 108336
 2010-07-14 17:25:37 +00:00
Dan Gohman
18711b19c9 Don't propagate debug locations to instructions for materializing 
constants, since they may not be emited near the other instructions
which get the same line, and this confuses debug info.

llvm-svn: 108302
 2010-07-14 01:07:44 +00:00
Jakob Stoklund Olesen
e2f74d400c Use COPY for fast-isel bitconvert, but don't create cross-class copies. 
This doesn't change the behavior of SelectBitcast for X86.

llvm-svn: 108073
 2010-07-11 05:16:54 +00:00
Jakob Stoklund Olesen
4b39aa26df Use COPY for extracting ImplicitDef'ed values from fast-isel instructions. 
This assumes that the registers can be copied which is probably a safe
assumption.

llvm-svn: 108070
 2010-07-11 03:31:05 +00:00
Jakob Stoklund Olesen
57bbaf37c0 Use COPY in FastISel everywhere it is safe and trivial. 
The remaining copyRegToReg calls actually check the return value (shock!), so we
cannot trivially replace them with COPY instructions.

llvm-svn: 108069
 2010-07-11 03:31:00 +00:00
Dan Gohman
fef30fcd5e Reapply bottom-up fast-isel, with several fixes for x86-32: 
- Check getBytesToPopOnReturn().
 - Eschew ST0 and ST1 for return values.
 - Fix the PIC base register initialization so that it doesn't ever
   fail to end up the top of the entry block.

llvm-svn: 108039
 2010-07-10 09:00:22 +00:00
Bob Wilson
9e8c9204ef --- Reverse-merging r107947 into '.': 
U    utils/TableGen/FastISelEmitter.cpp
--- Reverse-merging r107943 into '.':
U    test/CodeGen/X86/fast-isel.ll
U    test/CodeGen/X86/fast-isel-loads.ll
U    include/llvm/Target/TargetLowering.h
U    include/llvm/Support/PassNameParser.h
U    include/llvm/CodeGen/FunctionLoweringInfo.h
U    include/llvm/CodeGen/CallingConvLower.h
U    include/llvm/CodeGen/FastISel.h
U    include/llvm/CodeGen/SelectionDAGISel.h
U    lib/CodeGen/LLVMTargetMachine.cpp
U    lib/CodeGen/CallingConvLower.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
U    lib/CodeGen/SelectionDAG/FunctionLoweringInfo.cpp
U    lib/CodeGen/SelectionDAG/FastISel.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
U    lib/CodeGen/SelectionDAG/ScheduleDAGSDNodes.cpp
U    lib/CodeGen/SelectionDAG/InstrEmitter.cpp
U    lib/CodeGen/SelectionDAG/TargetLowering.cpp
U    lib/Target/XCore/XCoreISelLowering.cpp
U    lib/Target/XCore/XCoreISelLowering.h
U    lib/Target/X86/X86ISelLowering.cpp
U    lib/Target/X86/X86FastISel.cpp
U    lib/Target/X86/X86ISelLowering.h

llvm-svn: 107987
 2010-07-09 16:37:18 +00:00
Dan Gohman
7e6e4dd058 Re-apply bottom-up fast-isel, with fixes. Be very careful to avoid emitting 
a DBG_VALUE after a terminator, or emitting any instructions before an EH_LABEL.

llvm-svn: 107943
 2010-07-09 00:39:23 +00:00
Jakob Stoklund Olesen
30aacf68b9 Convert EXTRACT_SUBREG to COPY when emitting machine instrs. 
EXTRACT_SUBREG no longer appears as a machine instruction. Use COPY instead.

Add isCopy() checks in many places using isMoveInstr() and isExtractSubreg().
The isMoveInstr hook will be removed later.

llvm-svn: 107879
 2010-07-08 16:40:22 +00:00
Dan Gohman
4dcc56a102 Revert 107840 107839 107813 107804 107800 107797 107791. 
Debug info intrinsics win for now.

llvm-svn: 107850
 2010-07-08 01:00:56 +00:00
Dan Gohman
636476bc0b Don't forward-declare registers for static allocas, which we'll 
prefer to materialize as local constants. This fixes the clang
bootstrap abort.

llvm-svn: 107840
 2010-07-07 23:52:58 +00:00
Dan Gohman
d0caefa601 Implement bottom-up fast-isel. This has the advantage of not requiring 
a separate DCE pass over MachineInstrs.

llvm-svn: 107804
 2010-07-07 19:20:32 +00:00
Dan Gohman
b2d5b47efb Give FunctionLoweringInfo an MBB member, avoiding the need to pass it 
around everywhere, and also give it an InsertPt member, to enable isel
to operate at an arbitrary position within a block, rather than just
appending to a block.

llvm-svn: 107791
 2010-07-07 16:47:08 +00:00
Dan Gohman
b87c534168 Simplify FastISel's constructor by giving it a FunctionLoweringInfo 
instance, rather than pointers to all of FunctionLoweringInfo's
members.

This eliminates an NDEBUG ABI sensitivity.

llvm-svn: 107789
 2010-07-07 16:29:44 +00:00
Dan Gohman
1c3ce1ccd5 Move FunctionLoweringInfo.h out into include/llvm/CodeGen. This will 
allow target-specific fast-isel code to make use of it directly.

llvm-svn: 107787
 2010-07-07 16:01:37 +00:00
Dan Gohman
a3d664a713 Rename CreateReg to CreateRegs, and MakeReg to CreateReg. 
llvm-svn: 107451
 2010-07-02 00:10:16 +00:00
Dan Gohman
665da59f4d Rename CreateRegForValue to CreateReg, and change its argument 
from a Value to a Type, because it doesn't actually care about
the Value.

llvm-svn: 107383
 2010-07-01 03:55:39 +00:00
Dan Gohman
8022d8e885 Teach fast-isel to avoid loading a value from memory when it's already 
available in a register. This is pretty primitive, but it reduces the
number of instructions in common testcases by 4%.

llvm-svn: 107380
 2010-07-01 03:49:38 +00:00
Dan Gohman
7219aedff5 Enable on-demand fast-isel. 
llvm-svn: 107377
 2010-07-01 02:58:57 +00:00
Dan Gohman
b1b8a3a73a Do one lookup instead of two. 
llvm-svn: 106415
 2010-06-21 14:21:47 +00:00
Dan Gohman
408c991311 Generalize this to look in the regular ValueMap in addition to 
the LocalValueMap, to make it more flexible when fast-isel isn't
proceding straight top-down.

llvm-svn: 106414
 2010-06-21 14:17:46 +00:00
Dan Gohman
823dff64cd Teach regular and fast isel to set dead flags on unused implicit defs 
on calls and similar instructions.

llvm-svn: 106353
 2010-06-18 23:28:01 +00:00