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afff40a62d
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9732 Commits

Author SHA1 Message Date
Evan Cheng
afff40a62d 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103039 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 20:26:52 +00:00
Evan Cheng
28428cd6f3 Rename variables for consistency. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103013 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 17:12:26 +00:00
Devang Patel
9c488376ef Set DW_AT_APPLE_omit_frame_ptr in endFunction() where MachineFunction is available all the time. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103001 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 06:15:30 +00:00
Evan Cheng
f1ced259b5 Instruction selection optimizations may have moved the def of a function argument out of the entry block. rdar://7937489 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102993 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 00:58:39 +00:00
Evan Cheng
ba609c88a5 Teach scheduler about REG_SEQUENCE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102984 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 00:22:40 +00:00
Dan Gohman
2131e2a75f Re-enable isel kill flags, now that the local allocator is ignoring them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102981 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-04 00:12:15 +00:00
Jakob Stoklund Olesen
a50fba933c 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102976 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 23:49:20 +00:00
Dan Gohman
1fdc614bee 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102975 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 23:36:34 +00:00
Jakob Stoklund Olesen
b98c549d13 Check that subregisters don't have independent values in RemoveCopyByCommutingDef(). 
This fixes PR6941.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102970 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 22:40:32 +00:00
Eric Christopher
b4c14aaa50 Reword a comment slightly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102966 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 22:18:49 +00:00
Bob Wilson
ad98f795d0 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102960 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 21:38:11 +00:00
Dan Gohman
30fc5bbfd1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102907 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-03 14:35:47 +00:00
Dale Johannesen
d014761c93 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102843 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 16:41:11 +00:00
Anton Korobeynikov
17458a786e Insert ANY_EXTEND node instead of invalid truncate during DAG Combining (X & 1), 
when needed. This fixes PR7001

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102838 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 12:52:34 +00:00
Dan Gohman
d725f04ff8 Remove the code for special-casing byval for fast-isel. SelectionDAG 
handles argument lowering anyway, so there's no need for special
casing here.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102828 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 02:44:23 +00:00
Dan Gohman
0b7afeb440 Re-disable kill flags, as there is more trouble. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102826 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 01:57:56 +00:00
Dan Gohman
3a401bcd04 Re-enable kill flags from SelectionDAGISel, with a fix: don't 
try to put a kill flag on a DBG_INFO instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102820 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:50:53 +00:00
Dale Johannesen
e576f51e66 Fix a bug where debug info affected stack slot coloring. 
Seen in SingleSrc/Benchmarks/Misc/flops with TEST=optllcdbg.
7929951.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102819 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:41:15 +00:00
Dan Gohman
1b79a2ff54 Fix whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102817 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:33:28 +00:00
Dan Gohman
5d11ea39f7 Don't pass SDValues by non-const reference unless they may be 
modified.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102816 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:33:16 +00:00
Dan Gohman
95140a4cc1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102814 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:25:44 +00:00
Dan Gohman
1b40319eba Delete the EdgeMapping variable itself. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102810 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:02:20 +00:00
Dan Gohman
af1d8ca44a Get rid of the EdgeMapping map. Instead, just check for BasicBlock 
changes before doing phi lowering for switches.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102809 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-01 00:01:06 +00:00
Bill Wendling
d71bb56275 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102791 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 22:19:17 +00:00
Dan Gohman
e7fd7c6886 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102771 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 21:21:21 +00:00
Jakob Stoklund Olesen
8387d7db19 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102770 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 21:19:29 +00:00
Devang Patel
ccff812777 Attach AT_APPLE_optimized attribute to optimized function's debug info. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102743 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:38:23 +00:00
Dan Gohman
891ff8fbd6 EmitDbgValue doesn't need its EdgeMapping argument. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102742 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 19:35:33 +00:00
Jakob Stoklund Olesen
132dace4aa Don't use floating point in SimpleRegisterCoalescing. 
Rounding differences causes tests to fail on Linux.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102729 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 18:28:11 +00:00
Dan Gohman
3ce89f47de Apply a patch from Jan Sjodin to fix a compiler abort on vector 
comparisons sign-extended to a different bitwidth than the
comparison operands.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102721 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 17:19:19 +00:00
Dan Gohman
71cee76d26 Temporarily disable SelectionDAG kill flags, which are causing trouble. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102680 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 00:32:51 +00:00
Dan Gohman
47bd03b277 Set register kill flags on the SelectionDAG path, at least in the 
easy cases.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102678 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-30 00:08:21 +00:00
Jakob Stoklund Olesen
f07fc974d3 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102672 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 23:47:46 +00:00
Dan Gohman
a555ac9d15 Fix typos in assertion strings. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102666 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 23:25:34 +00:00
Jakob Stoklund Olesen
02104df05f Slightly verboser debug spew from coalescer 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102663 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 22:21:48 +00:00
Devang Patel
719f6a9d9c Refactor. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102661 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 20:40:36 +00:00
Dale Johannesen
8c5358c936 Make naked functions work on PPC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102657 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 19:32:19 +00:00
Devang Patel
67a444ca36 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



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102655 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 18:52:10 +00:00
Evan Cheng
bd6cb4ba1f Remove DBG_VALUE which reference dead stack slots. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102654 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 18:51:00 +00:00
Devang Patel
a83ce98d5f DO not push DBG_VALUE machine instructions for inlined fuction arguments in entry block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102653 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 18:50:36 +00:00
Evan Cheng
8fed76115e Add comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102606 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 06:58:53 +00:00
Evan Cheng
a36acad67d Re-enable 102565 with fixes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102602 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 06:33:38 +00:00
Evan Cheng
16e4ace951 Temporarily disable my changes to unbreak the build. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102590 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 03:34:19 +00:00
Evan Cheng
9e8a2b9346 Do not generate duplicate dbg_value instructions for function arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102585 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 01:40:30 +00:00
Dan Gohman
c924556dd5 Fix missing #include. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102584 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 01:39:13 +00:00
Evan Cheng
ee1d91a830 Avoid emitting a dbg_value machineinstr that's not going to be inserted into entry block. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102581 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 01:23:55 +00:00
Evan Cheng
1deef27b0a Check Reg against zero. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102573 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-29 00:59:34 +00:00
Evan Cheng
6691a8935c - 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102565 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 23:52:26 +00:00
Devang Patel
f38c6c89f1 tidy up. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102558 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 23:24:13 +00:00
Evan Cheng
2ad0fcf794 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. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@102554 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-04-28 23:08:54 +00:00