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24929 Commits

Author SHA1 Message Date
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
Chris Lattner
64d43d80be round zero-byte .zerofill directives up to 1 byte. This 
should fix some "g++.dg-struct-layout-1" failures, 
rdar://7886017

llvm-svn: 102421
 2010-04-27 07:41:44 +00:00
Dale Johannesen
eb61a7d616 Revert a small part of 102372; this fixes at least one 
of the dbg testsuite regressions.  I don't think this is
really the right fix; this change exposed an existing problem
upstream somewhere.

llvm-svn: 102410
 2010-04-27 02:10:05 +00:00
Chris Lattner
3af635a296 add a comment in verbose-asm mode indicating why a noop is being generated. 
llvm-svn: 102401
 2010-04-26 23:41:43 +00:00
Chris Lattner
6a5e706e3c on darwin empty functions need to codegen into something of non-zero length, 
otherwise labels get incorrectly merged.  We handled this by emitting a 
".byte 0", but this isn't correct on thumb/arm targets where the text segment
needs to be a multiple of 2/4 bytes.  Handle this by emitting a noop.  This
is more gross than it should be because arm/ppc are not fully mc'ized yet.

This fixes rdar://7908505

llvm-svn: 102400
 2010-04-26 23:37:21 +00:00
Bob Wilson
a1e343095f Avoid adding a null MD node operand, which crashes with "-debug" when trying 
to print the operand.

llvm-svn: 102395
 2010-04-26 22:56:56 +00:00
Devang Patel
bd798ce8dd Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This simplifies debug range entries. 
llvm-svn: 102394
 2010-04-26 22:54:28 +00:00
Dale Johannesen
59a438560c Remove crufty comments. 
llvm-svn: 102380
 2010-04-26 20:48:54 +00:00
Dale Johannesen
e098352ed1 Add DBG_VALUE handling for byval parameters; this 
produces a comment on targets that support it, but
the Dwarf writer is not hooked up yet.

llvm-svn: 102372
 2010-04-26 20:06:49 +00:00
Evan Cheng
0e6fc61f21 Insert dbg_value instructions for function entry block liveins (i.e. function arguments). 
llvm-svn: 102368
 2010-04-26 19:16:00 +00:00
Chris Lattner
f740a8ceeb fix PR6921 a different way. Intead of increasing the 
alignment of globals with a specified alignment, we fix
common variables to obey their alignment.  Add a comment
explaining why this behavior is important.

llvm-svn: 102365
 2010-04-26 18:46:46 +00:00
Evan Cheng
c72d8a7dad Re-enable 102323 with fix: do not update dbg_value's with incorrect frame indices when the live interval are being re-materialized. 
llvm-svn: 102361
 2010-04-26 18:37:21 +00:00
Chris Lattner
e80442aa6d Revert r102300/102301, which serious broke objc apps. 
llvm-svn: 102359
 2010-04-26 18:30:45 +00:00
Bob Wilson
d561daf520 Update MachineSSAUpdater with the same changes I made for the IR-level 
SSAUpdater.  I'm going to try to refactor this to share most of the code
between them.

llvm-svn: 102353
 2010-04-26 17:40:49 +00:00
Evan Cheng
5ad3cc1d5e Temporary disable spiller modifying dbg_value. It's breaking build. 
llvm-svn: 102327
 2010-04-26 08:24:07 +00:00
Evan Cheng
ed69b382ea - Move TargetLowering::EmitTargetCodeForFrameDebugValue to TargetInstrInfo and rename it to emitFrameIndexDebugValue. 
- Teach spiller to modify DBG_VALUE instructions to reference spill slots.

llvm-svn: 102323
 2010-04-26 07:38:55 +00:00
Dale Johannesen
582565e991 Stop abusing EmitInstrWithCustomInserter for target-dependent 
form of DEBUG_VALUE, as it doesn't have reasonable default
behavior for unsupported targets.  Add a new hook instead.
No functional change.

llvm-svn: 102320
 2010-04-25 21:33:54 +00:00
Dale Johannesen
1fc01985a3 Add comment re byval args. Doesn't actually work this way yet. 
xs

llvm-svn: 102316
 2010-04-25 21:03:54 +00:00
Chris Lattner
386a220f70 Fix PR6921: globals were not getting correctly rounded up to their 
preferred alignment unless they were common or some other special
case.

llvm-svn: 102300
 2010-04-25 05:30:43 +00:00
Evan Cheng
0abb54d631 When a load operand is promoted to an extload, replace other uses with uses of extload result truncated. 
llvm-svn: 102236
 2010-04-24 04:43:44 +00:00
Dan Gohman
5544b0c588 Apply a fix for a vector setcc dagcombine from Jan Sjodin. No 
testcase yet, as the testcase now fails downstream.

llvm-svn: 102228
 2010-04-24 01:17:30 +00:00
Evan Cheng
b9ff130d47 Code refactoring. 
llvm-svn: 102202
 2010-04-23 19:10:30 +00:00
Dan Gohman
6e9a8fcc28 Move FastISel's HandlePHINodesInSuccessorBlocks call down into FastISel 
itself too.

llvm-svn: 102176
 2010-04-23 15:29:50 +00:00
Dan Gohman
e9135cb3fb Revert 102135, 102129, 102127, 102106, 102104, 102102, 102012, 102004, 
because 102004 causes codegen to emit invalid assembly on at least
x86_64-unknown-gnu-linux.

llvm-svn: 102155
 2010-04-23 01:18:53 +00:00
Devang Patel
6adc5620ab Add comment. 
llvm-svn: 102129
 2010-04-22 20:56:35 +00:00