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b990a2f249
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Author SHA1 Message Date
Evan Cheng
b990a2f249 Teach two-address pass to do some coalescing while eliminating REG_SEQUENCE 
instructions.

e.g.
%reg1026<def> = VLDMQ %reg1025<kill>, 260, pred:14, pred:%reg0
%reg1027<def> = EXTRACT_SUBREG %reg1026, 6
%reg1028<def> = EXTRACT_SUBREG %reg1026<kill>, 5
...
%reg1029<def> = REG_SEQUENCE %reg1028<kill>, 5, %reg1027<kill>, 6, %reg1028, 7, %reg1027, 8, %reg1028, 9, %reg1027, 10, %reg1030<kill>, 11, %reg1032<kill>, 12

After REG_SEQUENCE is eliminated, we are left with:

%reg1026<def> = VLDMQ %reg1025<kill>, 260, pred:14, pred:%reg0
%reg1029:6<def> = EXTRACT_SUBREG %reg1026, 6
%reg1029:5<def> = EXTRACT_SUBREG %reg1026<kill>, 5

The regular coalescer will not be able to coalesce reg1026 and reg1029 because it doesn't
know how to combine sub-register indices 5 and 6. Now 2-address pass will consult the
target whether sub-registers 5 and 6 of reg1026 can be combined to into a larger
sub-register (or combined to be reg1026 itself as is the case here). If it is possible, 
it will be able to replace references of reg1026 with reg1029 + the larger sub-register
index.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103835 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 23:21:14 +00:00
Dan Gohman
fd72617688 Add some comments about undef. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103834 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 23:01:02 +00:00
Evan Cheng
12c24690c7 Model VST*_UPD and VST*oddUPD pair with REG_SEQUENCE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103833 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:54:52 +00:00
Dan Gohman
7f0d69555c Fast ISel trivially coalesces away no-op casts, so check for this when 
setting kill flags.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103832 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:53:18 +00:00
Jakob Stoklund Olesen
6a6328ba3d Don't bother spilling before a return 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103831 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:40:43 +00:00
Jakob Stoklund Olesen
ab2d00863f RegAllocLocal can count copies too 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103830 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:40:40 +00:00
Bill Wendling
23ead99283 SystemZ really does mean "has calls" and not just "adjusts stack." Go ahead and 
replace the check with the appropriate predicate. Modify the testcase to reflect
the correct code. (It should be saving callee-saved registers on the stack
allocated by the calling fuction.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103829 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:17:42 +00:00
Jakob Stoklund Olesen
efa155fd6e Track allocatable instead of reserved regs, and never take an unallocatable hint. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103828 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:02:56 +00:00
Dan Gohman
8b3a8f5773 Don't set kill flags for instructions which the scheduler has cloned. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103827 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:01:14 +00:00
Dan Gohman
4ee637c730 BR is a barrier. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103826 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 22:00:27 +00:00
Bill Wendling
f84d60b649 Several tail call tests apparently rely upon this being "adjusts stack" instead 
of "has calls". That's probably wrong, but it needs further
investigation. Revert to the original behavior until this is settled.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103824 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:58:35 +00:00
Jakob Stoklund Olesen
e97dda4fc5 Avoid scanning the long tail of physreg operands on calls 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103823 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:55:52 +00:00
Devang Patel
26c6995654 Do not forget to mark prcessed arguments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103822 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:55:50 +00:00
Jakob Stoklund Olesen
8a65c510a4 Count coalesced copies 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103821 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:55:50 +00:00
Jakob Stoklund Olesen
a0e618de5d Allow virtreg redefines when verifying for RegAllocFast 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103820 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:55:44 +00:00
Bill Wendling
55ed945bfd This should happen if there are no calls, not if it just doesn't adjust the 
stack.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103813 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:38:44 +00:00
Bill Wendling
0fc546b053 Revert r103804. The comment is correct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103808 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:28:24 +00:00
Jim Grosbach
01384ef159 Remove trailing whitespace 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103807 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:20:46 +00:00
Jim Grosbach
9001303a3f 80 column and trailing whitespace cleanup 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103806 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:19:48 +00:00
Jim Grosbach
5468e0928b add cmd line option to leave dbgvalues in during post-RA sceduling. Useful 
while debugging what's mishandled about them in the post-RA pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103805 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:18:04 +00:00
Bill Wendling
d33fa0f9e0 Fix comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103804 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:17:29 +00:00
Bill Wendling
b92187a410 Rename "HasCalls" in MachineFrameInfo to "AdjustsStack" to better describe what 
the variable actually tracks.

N.B., several back-ends are using "HasCalls" as being synonymous for something
that adjusts the stack. This isn't 100% correct and should be looked into.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103802 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:14:32 +00:00
Devang Patel
552b888744 Test case for r103800. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103801 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:04:45 +00:00
Dan Gohman
71ea4e5b05 Lowering of atomic instructions can result in operands being 
used more than once. If ISel had put a kill flag on one of them,
it's not valid to transfer the kill flag to each new instance.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103799 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:01:44 +00:00
Devang Patel
98e1cac52c Add support to preserve type info for the variables that are removed by the optimizer. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103798 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 21:01:35 +00:00
Jakob Stoklund Olesen
1b2c761a9c When verifying two-address instructions, check the following: 
- Kill is implicit when use and def registers are identical.
- Only virtual registers can differ.

Add a -verify-fast-regalloc to run the verifier before the fast allocator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103797 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 20:28:32 +00:00
Kevin Enderby
c3ce05c594 Fix so "int3" is correctly accepted, added "into" and fixed "int" with an 
argument, like "int $4", to not get an Assertion error.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103791 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 19:16:02 +00:00
Evan Cheng
5c6aba2e3a Model VLD*_UPD and VLD*odd_UPD pair with REG_SEQUENCE. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103790 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 18:54:59 +00:00
Daniel Dunbar
f0f6cdb6b4 MC/Mach-O/x86_64: Darwin's special "signed_N" relocation types should only be 
used to replace a normal relocation, not a reference to a GOT entry.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103789 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 18:53:40 +00:00
Jakob Stoklund Olesen
4ed1082683 Simplify the handling of physreg defs and uses in RegAllocFast. 
This adds extra security against using clobbered physregs, and it adds kill
markers to physreg uses.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103784 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 18:03:25 +00:00
Dan Gohman
effc8c5269 Set isTerminator on TRAP instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103778 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 16:46:02 +00:00
Dan Gohman
c0c32ae5c2 Don't use isBarrier for the PowerPC sync instruction. isBarrier is for 
control barriers, not memory ordering barriers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103777 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 16:42:16 +00:00
Dan Gohman
7f357ec6d2 Add mayLoad and mayStore flags to instructions which missed them. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103776 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 16:34:55 +00:00
Dan Gohman
9cc1c18b7b Use regular PassManager instead of FunctionPassManager in opt, since it 
isn't doing lazy streaming. This also fixes a missing doFinalization call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103774 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 15:36:54 +00:00
Dan Gohman
8090e214f7 Use PassManagerBase, to give clients the option of using either 
FunctionPassManager or regular PassManager.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103773 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 15:35:10 +00:00
Dan Gohman
89938ce0ad Add an isNodeHidden to the graph traits, to support definition of 
subgraph views.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103772 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 15:29:31 +00:00
Daniel Dunbar
bd616b69f7 XFAIL the test I added with vg_leak, apparently it is the first and only llc 
-filetype=obj test, and -filetype=obj leaks a few objects. Added a FIXME, we
need to sort out the ownership model for the various MC objects.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103769 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 07:47:51 +00:00
Evan Cheng
0ebf356ddf Get rid of the bit twiddling to read / set OpActions and ValueTypeActions. The small saving in memory isn't worth the increase in runtime and code complexity in my opinion. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103768 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 07:37:40 +00:00
Daniel Dunbar
d11d59e35a Inline Asm: Ensure buffer is newline terminated to match how the text is printed. 
- This is a hack, but I can't decide the best place to handle this. Chris?

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103765 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 04:31:50 +00:00
Jakob Stoklund Olesen
7ff82e1501 Enable opportunistic coalescing 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103764 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 04:30:51 +00:00
Evan Cheng
22c687b642 Added a QQQQ register file to model 4-consecutive Q registers. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103760 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 02:13:41 +00:00
Eric Christopher
482eba054a Add AsmParser support for darwin tbss directive. 
Nothing uses this yet.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103757 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 01:50:28 +00:00
Eric Christopher
c260a3e59a Fix a couple of typos. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103756 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 01:38:54 +00:00
Nick Lewycky
3fa0c8ca96 Fix typo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103755 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 01:02:48 +00:00
Daniel Dunbar
47b3ec4daa MC: Switch to completely lazy layout. 
- The eliminates the last major algorithmic problem with MC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103754 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:51:14 +00:00
Daniel Dunbar
9005d45a99 MC: Extend MCAsmLayout to explicitly track which fragments have been layed out, and enforce several invariants to LayoutFragment to ensure we only do layout in a sensible order. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103753 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:21 +00:00
Daniel Dunbar
11c4111516 MC: Implicitly assign section addresses when the previous fragment is layed out. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103752 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:17 +00:00
Daniel Dunbar
337718e09c MC: Switch MCFragment to storing the layout order index, not its index in the file. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103751 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:14 +00:00
Daniel Dunbar
afc6acdab7 MC: Change LayoutSection() to only do the section initializiation. 
Also, elimminate MCAsmLayout::set*, which are no longer needed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103750 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:37:11 +00:00
Evan Cheng
7f68719517 Fix comments. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103749 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-05-14 00:21:45 +00:00