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9670 Commits

Author SHA1 Message Date
Bob Wilson
d1b38e317d Combine the implementations of the core part of the SSAUpdater and 
MachineSSAUpdater to avoid duplicating all the code.

llvm-svn: 103060
 2010-05-04 23:18:19 +00:00
Evan Cheng
4c908f4181 Teach PHI elimination to remove REG_SEQUENCE instructions and update references of the source operands with references of the destination with subreg indices. e.g. 
%reg1029<def>, %reg1030<def> = VLD1q16 %reg1024<kill>, ...
%reg1031<def> = REG_SEQUENCE %reg1029<kill>, 5, %reg1030<kill>, 6
=>
%reg1031:5<def>, %reg1031:6<def> = VLD1q16 %reg1024<kill>, ...

PHI elimination now does more than phi elimination. It is really a de-SSA pass.

llvm-svn: 103039
 2010-05-04 20:26:52 +00:00
Evan Cheng
a5c0cc329e Rename variables for consistency. 
llvm-svn: 103013
 2010-05-04 17:12:26 +00:00
Devang Patel
075e9b5d66 Set DW_AT_APPLE_omit_frame_ptr in endFunction() where MachineFunction is available all the time. 
llvm-svn: 103001
 2010-05-04 06:15:30 +00:00
Evan Cheng
55869af998 Instruction selection optimizations may have moved the def of a function argument out of the entry block. rdar://7937489 
llvm-svn: 102993
 2010-05-04 00:58:39 +00:00
Evan Cheng
f869d9adf2 Teach scheduler about REG_SEQUENCE. 
llvm-svn: 102984
 2010-05-04 00:22:40 +00:00
Dan Gohman
0e79c864c3 Re-enable isel kill flags, now that the local allocator is ignoring them. 
llvm-svn: 102981
 2010-05-04 00:12:15 +00:00
Jakob Stoklund Olesen
b944b39887 Remove preexisting kill flags in RegAllocLocal, just like LiveVariables does. 
This should make it possible to start producing kill flags in isel without
breaking stuff.

llvm-svn: 102976
 2010-05-03 23:49:20 +00:00
Dan Gohman
626b5d8e0c 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
Jakob Stoklund Olesen
f4e4e84115 Check that subregisters don't have independent values in RemoveCopyByCommutingDef(). 
This fixes PR6941.

llvm-svn: 102970
 2010-05-03 22:40:32 +00:00
Eric Christopher
1e679cbfff Reword a comment slightly. 
llvm-svn: 102966
 2010-05-03 22:18:49 +00:00
Bob Wilson
c936b56871 Print basic block numbers in live interval debug output. Since the rest of the 
debug output is showing machine instructions, the IR-level basic block names
aren't very meaningful, and because multiple machine basic blocks may be
derived from one IR-level BB, they're also not unique.

llvm-svn: 102960
 2010-05-03 21:38:11 +00:00
Dan Gohman
2ad68de4aa Fix a bug which prevented tail merging of return instructions in 
beneficial cases. See the changes in test/CodeGen/X86/tail-opts.ll and
test/CodeGen/ARM/ifcvt2.ll for details.

The fix is to change HashEndOfMBB to hash at most one instruction,
instead of trying to apply heuristics about when it will be profitable to
consider more than one instruction. The regular tail-merging heuristics
are already prepared to handle the same cases, and they're more precise.

Also, make test/CodeGen/ARM/ifcvt5.ll and
test/CodeGen/Thumb2/thumb2-branch.ll slightly more complex so that they
continue to test what they're intended to test.

And, this eliminates the problem in
test/CodeGen/Thumb2/2009-10-15-ITBlockBranch.ll, the testcase from
PR5204. Update it accordingly.

llvm-svn: 102907
 2010-05-03 14:35:47 +00:00
Dale Johannesen
1ebb395cee Don't count debug info as instructions. This was 
preventing the emission of the NOP on Darwin for a
function with no actual code.  From timberwolfmc
with TEST=optllcdbg.

llvm-svn: 102843
 2010-05-01 16:41:11 +00:00
Anton Korobeynikov
737718d4f4 Insert ANY_EXTEND node instead of invalid truncate during DAG Combining (X & 1), 
when needed. This fixes PR7001

llvm-svn: 102838
 2010-05-01 12:52:34 +00:00
Dan Gohman
ec74444d3e Remove the code for special-casing byval for fast-isel. SelectionDAG 
handles argument lowering anyway, so there's no need for special
casing here.

llvm-svn: 102828
 2010-05-01 02:44:23 +00:00
Dan Gohman
4959cf19b2 Re-disable kill flags, as there is more trouble. 
llvm-svn: 102826
 2010-05-01 01:57:56 +00:00
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