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102 Commits

Author SHA1 Message Date
Chad Rosier
7e0dc23863 [fast-isel] Add support for selecting insertvalue. 
rdar://10530851

llvm-svn: 146276
 2011-12-09 20:09:54 +00:00
Chad Rosier
0ff2f46d12 If fast-isel fails, remove dead instructions generated during the failed 
attempt.  

llvm-svn: 145425
 2011-11-29 19:40:47 +00:00
Benjamin Kramer
bff5aaee3f Make headers standalone. 
llvm-svn: 144537
 2011-11-14 17:45:03 +00:00
Ivan Krasin
338df71d60 FastISel: avoid function calls between the materialization of the constant and its use. 
llvm-svn: 137993
 2011-08-18 22:06:10 +00:00
Devang Patel
72886ba8d8 Revert r135423. 
llvm-svn: 135454
 2011-07-19 00:28:24 +00:00
Devang Patel
389cb9d8c6 During bottom up fast-isel, instructions emitted to materalize registers are at top of basic block and do not have debug location. This may misguide debugger while entering the basic block and sometimes debugger provides semi useful view of current location to developer by picking up previous known location as current location. Assign a sensible location to the first instruction in a basic block, if it does not have one location derived from source file, so that debugger can provide meaningful user experience to developers in edge cases. 
[take 2]

llvm-svn: 135423
 2011-07-18 20:55:23 +00:00
Devang Patel
66c4bc1dda Revert r133953 for now. 
llvm-svn: 134116
 2011-06-29 23:50:13 +00:00
Devang Patel
8fbd4b55ea During bottom up fast-isel, instructions emitted to materalize registers are at top of basic block and do not have debug location. This may misguide debugger while entering the basic block and sometimes debugger provides semi useful view of current location to developer by picking up previous known location as current location. Assign a sensible location to the first instruction in a basic block, if it does not have one location derived from source file, so that debugger can provide meaningful user experience to developers in edge cases. 
llvm-svn: 133953
 2011-06-27 22:32:04 +00:00
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
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
Owen Anderson
35f6bae989 Allow FastISel of three-register-operand instructions. 
llvm-svn: 130934
 2011-05-05 17:59:04 +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
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
Eric Christopher
4de9ef5cf7 Fix comment. 
llvm-svn: 130027
 2011-04-22 23:08:45 +00:00
Owen Anderson
78afadfa5d Teach FastISel to support register-immediate-immediate instructions. 
llvm-svn: 127496
 2011-03-11 21:33:55 +00:00
Benjamin Kramer
96ac873014 Prune includes. 
llvm-svn: 118342
 2010-11-06 11:45:59 +00:00
Chris Lattner
684ae57b8e implement rdar://6653118 - fastisel should fold loads where possible. 
Since mem2reg isn't run at -O0, we get a ton of reloads from the stack,
for example, before, this code:

int foo(int x, int y, int z) {
  return x+y+z;
}

used to compile into:

_foo:                                   ## @foo
	subq	$12, %rsp
	movl	%edi, 8(%rsp)
	movl	%esi, 4(%rsp)
	movl	%edx, (%rsp)
	movl	8(%rsp), %edx
	movl	4(%rsp), %esi
	addl	%edx, %esi
	movl	(%rsp), %edx
	addl	%esi, %edx
	movl	%edx, %eax
	addq	$12, %rsp
	ret

Now we produce:

_foo:                                   ## @foo
	subq	$12, %rsp
	movl	%edi, 8(%rsp)
	movl	%esi, 4(%rsp)
	movl	%edx, (%rsp)
	movl	8(%rsp), %edx
	addl	4(%rsp), %edx    ## Folded load
	addl	(%rsp), %edx     ## Folded load
	movl	%edx, %eax
	addq	$12, %rsp
	ret

Fewer instructions and less register use = faster compiles.

llvm-svn: 113102
 2010-09-05 02:18:34 +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
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
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
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
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
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
Stuart Hastings
bd7194d21c Add a DebugLoc parameter to TargetInstrInfo::InsertBranch(). This 
addresses a longstanding deficiency noted in many FIXMEs scattered
across all the targets.

This effectively moves the problem up one level, replacing eleven
FIXMEs in the targets with eight FIXMEs in CodeGen, plus one path
through FastISel where we actually supply a DebugLoc, fixing Radar
7421831.

llvm-svn: 106243
 2010-06-17 22:43:56 +00:00
Dan Gohman
03e407ed83 Add initial kill flag support to FastISel. 
llvm-svn: 103529
 2010-05-11 23:54:07 +00:00
Dan Gohman
180422793f Add an "IsBottomUp" member function to FastISel, which will be used to 
support a new bottom-up mode.

llvm-svn: 103138
 2010-05-05 23:58:35 +00:00
Dan Gohman
8bfd5f99b5 Factor out FastISel's code for materializing constants and other values 
in registers into a separate function to de-couple it from the
top-down-specific logic in getRegForValue.

llvm-svn: 102975
 2010-05-03 23:36:34 +00:00
Dan Gohman
6680b97d89 Move FastISel's HandlePHINodesInSuccessorBlocks call down into FastISel 
itself too.

llvm-svn: 102176
 2010-04-23 15:29:50 +00:00
Dan Gohman
d819e7fc95 Move HandlePHINodesInSuccessorBlocks functions out of SelectionDAGISel 
and into SelectionDAGBuilder and FastISel.

llvm-svn: 102123
 2010-04-22 20:46:50 +00:00
Dan Gohman
e8387b1250 Sink DebugLoc handling out of SelectionDAGISel into FastISel and 
SelectionDAGBuilder, where it doesn't have to be as complicated.

llvm-svn: 101848
 2010-04-20 00:48:35 +00:00
Dan Gohman
0e0b8cf9fd Add const qualifiers to CodeGen's use of LLVM IR constructs. 
llvm-svn: 101334
 2010-04-15 01:51:59 +00:00
Dan Gohman
c64d1d02a3 Factor out EH landing pad code into a separate function, and constify 
a bunch of stuff to support it.

llvm-svn: 101273
 2010-04-14 19:53:31 +00:00
Dan Gohman
9ed196804f Fix a missing #include. 
llvm-svn: 101270
 2010-04-14 18:57:18 +00:00
Dan Gohman
2d61a3f384 Refine #includes. 
llvm-svn: 101269
 2010-04-14 18:49:17 +00:00
Chris Lattner
1f68705ad9 trim some prototypes. 
llvm-svn: 100420
 2010-04-05 06:21:01 +00:00
Chris Lattner
6f3c3f60ce unthread MMI from FastISel 
llvm-svn: 100416
 2010-04-05 06:05:26 +00:00
Chris Lattner
1fda8b3a8b fastisel doesn't need DwarfWriter, remove some tendricles. 
llvm-svn: 100381
 2010-04-05 02:19:28 +00:00
Dan Gohman
9ef9e2c758 Don't use the ISD::NodeType enum for SDNode opcodes, as CodeGen 
uses several kinds of opcode values which are not declared within
that enum. This fixes PR5946.

llvm-svn: 92794
 2010-01-05 22:26:32 +00:00
Dan Gohman
c9454cd34f Make TargetSelectInstruction protected and called from FastISel.cpp 
instead of SelectionDAGISel.cpp.

llvm-svn: 90636
 2009-12-05 01:27:58 +00:00
Dan Gohman
1b6c3b40ec Fix a name in a comment. 
llvm-svn: 83306
 2009-10-05 15:23:17 +00:00
Dan Gohman
c24fb1af4f LLVM currently represents floating-point negation as -0.0 - x. Fix 
FastISel to recognize this pattern and emit a floating-point
negation using xor.

llvm-svn: 80963
 2009-09-03 22:53:57 +00:00
Owen Anderson
48f2f0ae72 Split EVT into MVT and EVT, the former representing _just_ a primitive type, while 
the latter is capable of representing either a primitive or an extended type.

llvm-svn: 78713
 2009-08-11 20:47:22 +00:00
Owen Anderson
b4bce99769 Rename MVT to EVT, in preparation for splitting SimpleValueType out into its own struct type. 
llvm-svn: 78610
 2009-08-10 22:56:29 +00:00
Owen Anderson
cc287b28c9 Get rid of the Pass+Context magic. 
llvm-svn: 76702
 2009-07-22 00:24:57 +00:00