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9853 Commits

Author SHA1 Message Date
Dan Gohman
77ef6f6a17 Re-enable kill flags from SelectionDAGISel, with a fix: don't 
try to put a kill flag on a DBG_INFO instruction.

llvm-svn: 102820
 2010-05-01 00:50:53 +00:00
Dale Johannesen
3dca8f3da3 Fix a bug where debug info affected stack slot coloring. 
Seen in SingleSrc/Benchmarks/Misc/flops with TEST=optllcdbg.
7929951.

llvm-svn: 102819
 2010-05-01 00:41:15 +00:00
Dan Gohman
096619eb52 Fix whitespace. 
llvm-svn: 102817
 2010-05-01 00:33:28 +00:00
Dan Gohman
63f31115cd Don't pass SDValues by non-const reference unless they may be 
modified.

llvm-svn: 102816
 2010-05-01 00:33:16 +00:00
Dan Gohman
5d059718c9 Reorgnaize more switch code lowering to clean up some tricky 
code, and to eliminate the need for the SelectionDAGBuilder
state to be live during CodeGenAndEmitDAG calls.

Call SDB->clear() before CodeGenAndEmitDAG calls instead of
before it, and move the CurDAG->clear() out of SelectionDAGBuilder,
which doesn't own the DAG, and into CodeGenAndEmitDAG.

llvm-svn: 102814
 2010-05-01 00:25:44 +00:00
Dan Gohman
f0514717cd Delete the EdgeMapping variable itself. 
llvm-svn: 102810
 2010-05-01 00:02:20 +00:00
Dan Gohman
25c1653700 Get rid of the EdgeMapping map. Instead, just check for BasicBlock 
changes before doing phi lowering for switches.

llvm-svn: 102809
 2010-05-01 00:01:06 +00:00
Bill Wendling
de4b225093 EXTRACT_VECTOR_ELT of an INSERT_VECTOR_ELT may have the same index, but the 
indexes could be of a different value type. Or not even using the same SDNode
for the constant (weird, I know). Compare the actual values instead of the
pointers.

llvm-svn: 102791
 2010-04-30 22:19:17 +00:00
Dan Gohman
09452cecd8 Remove this debug output. The MachineFunction will be printed once all of 
instruction selection is done; it's confusing to see parts of it printed,
while other parts are omitted, along the way.

llvm-svn: 102771
 2010-04-30 21:21:21 +00:00
Jakob Stoklund Olesen
9afed0f98b The local register allocator has to spill dirty callee saved registers before a 
call that might throw. The landing pad assumes that all registers are in stack
slots.

We used to spill those dirty CSRs after the call, and the stack slots would be
wrong when arriving at the landing pad.

llvm-svn: 102770
 2010-04-30 21:19:29 +00:00
Devang Patel
b4e3b9025c Attach AT_APPLE_optimized attribute to optimized function's debug info. 
llvm-svn: 102743
 2010-04-30 19:38:23 +00:00
Dan Gohman
8acc8f7dfd EmitDbgValue doesn't need its EdgeMapping argument. 
llvm-svn: 102742
 2010-04-30 19:35:33 +00:00
Jakob Stoklund Olesen
408459ffa6 Don't use floating point in SimpleRegisterCoalescing. 
Rounding differences causes tests to fail on Linux.

llvm-svn: 102729
 2010-04-30 18:28:11 +00:00
Dan Gohman
e82c25e878 Apply a patch from Jan Sjodin to fix a compiler abort on vector 
comparisons sign-extended to a different bitwidth than the
comparison operands.

llvm-svn: 102721
 2010-04-30 17:19:19 +00:00
Dan Gohman
587e0800e5 Temporarily disable SelectionDAG kill flags, which are causing trouble. 
llvm-svn: 102680
 2010-04-30 00:32:51 +00:00
Dan Gohman
ac55510c4e Set register kill flags on the SelectionDAG path, at least in the 
easy cases.

llvm-svn: 102678
 2010-04-30 00:08:21 +00:00
Jakob Stoklund Olesen
8d4214578d Reject really weird coalescer case when trying to merge identical subregisters 
of different register classes. e.g.

  %reg1048:3<def> = EXTRACT_SUBREG %RAX<kill>, 3

Where %reg1048 is a GR32 register. This is not impossible to handle, but it is
pretty hard and very rare.

This should unbreak the dragonegg builder.

llvm-svn: 102672
 2010-04-29 23:47:46 +00:00
Dan Gohman
35cd68c888 Fix typos in assertion strings. 
llvm-svn: 102666
 2010-04-29 23:25:34 +00:00
Jakob Stoklund Olesen
e2550f4f93 Slightly verboser debug spew from coalescer 
llvm-svn: 102663
 2010-04-29 22:21:48 +00:00
Devang Patel
0395553e35 Refactor. 
llvm-svn: 102661
 2010-04-29 20:40:36 +00:00
Dale Johannesen
6feac8a39b Make naked functions work on PPC. 
llvm-svn: 102657
 2010-04-29 19:32:19 +00:00
Devang Patel
080e4fb2f0 Print variable scope name in DEBUG_VALUE comment. Useful in some cases. e.g. 
##DEBUG_VALUE: runOnMachineFunction:this <- RDI+0
	##DEBUG_VALUE: runOnMachineFunction:fn <- RSI+0
	##DEBUG_VALUE: DeadDefs <- undef ## SimpleRegisterCoalescing.cpp:2706
	##DEBUG_VALUE: getRegInfo:this <- [%rsp+$56]+$0
	##DEBUG_VALUE: getTarget:this <- [%rsp+$56]+$0

llvm-svn: 102655
 2010-04-29 18:52:10 +00:00
Evan Cheng
6e7ca24907 Remove DBG_VALUE which reference dead stack slots. 
llvm-svn: 102654
 2010-04-29 18:51:00 +00:00
Devang Patel
a46953d281 DO not push DBG_VALUE machine instructions for inlined fuction arguments in entry block. 
llvm-svn: 102653
 2010-04-29 18:50:36 +00:00
Evan Cheng
5c864b42b2 Add comment. 
llvm-svn: 102606
 2010-04-29 06:58:53 +00:00
Evan Cheng
923679f929 Re-enable 102565 with fixes. 
llvm-svn: 102602
 2010-04-29 06:33:38 +00:00
Evan Cheng
d65a1e782b Temporarily disable my changes to unbreak the build. 
llvm-svn: 102590
 2010-04-29 03:34:19 +00:00
Evan Cheng
5fb45a2b85 Do not generate duplicate dbg_value instructions for function arguments. 
llvm-svn: 102585
 2010-04-29 01:40:30 +00:00
Dan Gohman
d9e7322c9a Fix missing #include. 
llvm-svn: 102584
 2010-04-29 01:39:13 +00:00
Evan Cheng
70a0145d7c Avoid emitting a dbg_value machineinstr that's not going to be inserted into entry block. 
llvm-svn: 102581
 2010-04-29 01:23:55 +00:00
Evan Cheng
f4336ebb2a Check Reg against zero. 
llvm-svn: 102573
 2010-04-29 00:59:34 +00:00
Evan Cheng
a5a8f76cea - Really preserve dbg_value instructions when the register is spilled. 
- Also, update dbg_value is the value is being re-matted from a frame slot, e.g. fixed slots for arguments.

llvm-svn: 102565
 2010-04-28 23:52:26 +00:00
Devang Patel
bb728e17d3 tidy up. 
llvm-svn: 102558
 2010-04-28 23:24:13 +00:00
Evan Cheng
6e822459ed Replace r102368 with code that's less fragile. This creates DBG_VALUE instructions for function arguments early and insert them after instruction selection is done. 
llvm-svn: 102554
 2010-04-28 23:08:54 +00:00
Evan Cheng
d4d1a51895 Pretty print DBG_VALUE machine instructions. 
Before:
DBG_VALUE %RSI, 0, !-1; dbg:SimpleRegisterCoalescing.cpp:2707
Now:
DBG_VALUE %RSI, 0, !"this"; dbg:SimpleRegisterCoalescing.cpp:2707

llvm-svn: 102518
 2010-04-28 20:03:13 +00:00
Chris Lattner
08e9e72fa9 Rework global alignment computation again. Now we do round up 
alignment of globals to the preferred alignment, but only when
there is no section specified on the global (by far the common
case).

llvm-svn: 102515
 2010-04-28 19:58:07 +00:00
Devang Patel
888c17073a While lowering dbg_declare, emit DBG_VALUE machine instruction if alloca matching llvm.dbg.declare intrinsic is missing. 
llvm-svn: 102513
 2010-04-28 19:27:33 +00:00
Jakob Stoklund Olesen
06e7242d32 Recompute kill flags from live intervals after coalescing instead of trying to 
update them. Computing kill flags is notoriously difficult, and the coalescer
would get it wrong sometimes, and it would completely skip physical registers.

Now we simply remove kill flags based on the live intervals after coalescing.
This is a few percent slower, but now we get correct kill flags for physical
registers after coalescing.

llvm-svn: 102510
 2010-04-28 18:28:39 +00:00
Evan Cheng
f100557c9a Try operation promotion only if regular dag combine and target-specific ones failed to do anything. 
llvm-svn: 102492
 2010-04-28 07:10:39 +00:00
Devang Patel
50c9431203 Emit debug info for byval parameters. 
llvm-svn: 102486
 2010-04-28 01:39:28 +00:00
Chris Lattner
a3facc5cb5 further simplify EmitAlignment by eliminating the 
ForcedAlignBits argument, tweaking the single client of it.

llvm-svn: 102484
 2010-04-28 01:08:40 +00:00
Chris Lattner
72bdee4c10 remove a dead argument to EmitAlignment. 
llvm-svn: 102483
 2010-04-28 01:06:02 +00:00
Chris Lattner
9e06e53fc6 remove some default arguments to EmitAlignment. 
llvm-svn: 102482
 2010-04-28 01:05:45 +00:00
Devang Patel
173b2b9d05 Refactor. 
llvm-svn: 102481
 2010-04-28 01:03:09 +00:00
Devang Patel
cfc76fdaf1 Use isReg(), isImm() and isFPImm(). 
llvm-svn: 102470
 2010-04-27 22:04:41 +00:00
Devang Patel
1f34c2727d Check operand type first. 
llvm-svn: 102468
 2010-04-27 21:49:04 +00:00
Devang Patel
1a0bbe25e3 Ignore DBG_VALUE instructions that points to undef values. 
llvm-svn: 102463
 2010-04-27 20:54:45 +00:00
Evan Cheng
e813690b7a - When legal, promote a load to zextload rather than ext load. 
- Catch more further dag combine opportunities as result of operand promotion, e.g. (i32 anyext (i16 trunc (i32 x))) -> (i32 x)

llvm-svn: 102455
 2010-04-27 19:48:13 +00:00
Devang Patel
6c74a872a8 Identify when a lexical scope is split in to multiple instruction ranges. Emit such ranges using DW_AT_ranges. 
This patch fixes bug (PR6894) introduced by previous version of this patch.

llvm-svn: 102454
 2010-04-27 19:46:33 +00:00
Evan Cheng
eb828b6391 Do not count kill, implicit_def instructions as printed instructions. 
llvm-svn: 102453
 2010-04-27 19:38:45 +00:00