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Author SHA1 Message Date
Chris Lattner
4bda3547ba more notes. 
llvm-svn: 65439
 2009-02-25 07:32:53 +00:00
Evan Cheng
befebff8fc Clean up dwarf writer, part 1. This eliminated the horrible recursive getGlobalVariablesUsing and replaced it something readable. It eliminated use of slow UniqueVector and replaced it with StringMap, SmallVector, and DenseMap, etc. It also fixed some non-deterministic behavior. 
This is a very minor compile time win.

llvm-svn: 65438
 2009-02-25 07:04:34 +00:00
Nick Lewycky
8672fb675c Add a totally synthetic situation I came up with while looking at a bug in 
related code.

llvm-svn: 65437
 2009-02-25 06:52:48 +00:00
Chris Lattner
800261b58f random notes 
llvm-svn: 65436
 2009-02-25 06:34:50 +00:00
Nick Lewycky
97156ee783 Recommend against using Gold to build LLVM. 
llvm-svn: 65435
 2009-02-25 06:29:47 +00:00
Chris Lattner
78e2933103 don't know if there is a vmkit release to match 2.5 
llvm-svn: 65434
 2009-02-25 05:45:05 +00:00
Chris Lattner
50a191ab82 update clang section 
llvm-svn: 65430
 2009-02-25 05:09:54 +00:00
Chris Lattner
934fa00e1d rip out llvm 2.4 details to make room for 2.5 
llvm-svn: 65429
 2009-02-25 04:41:31 +00:00
Scott Michel
3f273a8412 Expand tabs to spaces (overlooked in previous commit) 
llvm-svn: 65427
 2009-02-25 03:57:49 +00:00
Scott Michel
29d7559c09 Remove all "cached" data from BuildVectorSDNode, preferring to retrieve 
results via reference parameters.

This patch also appears to fix Evan's reported problem supplied as a
reduced bugpoint test case.

llvm-svn: 65426
 2009-02-25 03:12:50 +00:00
Mon P Wang
c9b4dab417 Added support to have TableGen provide information if an intrinsic (core 
or target) can be overloaded or not.

llvm-svn: 65404
 2009-02-24 23:17:49 +00:00
Devang Patel
936c18daca If compile unit's language is not set then don't crash while dump'ing compile unit. 
llvm-svn: 65402
 2009-02-24 23:15:09 +00:00
Daniel Dunbar
d5e0934e30 Extension of GEP in constant folder was broken (apparently this code 
has never been run!).
 - Sorry, don't know how to make an LLVM test case for this.

llvm-svn: 65383
 2009-02-24 19:10:46 +00:00
Dan Gohman
dd9c79d45b Rename ScalarEvolution's getIterationCount to getBackedgeTakenCount, 
to more accurately describe what it does. Expand its doxygen comment
to describe what the backedge-taken count is and how it differs
from the actual iteration count of the loop. Adjust names and
comments in associated code accordingly.

llvm-svn: 65382
 2009-02-24 18:55:53 +00:00
Bill Wendling
9d4eb136da Overhaul my earlier submission due to feedback. It's a large patch, but most of 
them are generic changes.

- Use the "fast" flag that's already being passed into the asm printers instead
  of shoving it into the DwarfWriter.

- Instead of calling "MI->getParent()->getParent()" for every MI, set the
  machine function when calling "runOnMachineFunction" in the asm printers.

llvm-svn: 65379
 2009-02-24 08:30:20 +00:00
Owen Anderson
ffcb59129f Add a debugging option for SSC DCE. 
llvm-svn: 65375
 2009-02-24 05:44:18 +00:00
Bill Wendling
0d8316c5e0 - Use the "Fast" flag instead of "OptimizeForSize" to determine whether to emit 
a DBG_LABEL or not. We want to fall back to the original way of emitting debug
  info when we're in -O0/-fast mode.
- Add plumbing in to pass the "Fast" flag to places that need it.
- XFAIL DebugInfo/deaddebuglabel.ll. This is finding 11 labels instead of 8. I
  need to investigate still.

llvm-svn: 65367
 2009-02-24 02:35:30 +00:00
Dan Gohman
486728ef53 Add a testcase for the problem fixed in r65289. 
llvm-svn: 65365
 2009-02-24 02:17:42 +00:00
Dan Gohman
1197d46ccf Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple 
ashr instcombine to help expose this code. And apply the fix to
SelectionDAG's copy of this code too.

llvm-svn: 65364
 2009-02-24 02:00:40 +00:00
Dan Gohman
f5bb2d8747 Generalize the ChangeCompareStride code, in preparation for 
handling non-constant strides. No functionality change.

llvm-svn: 65363
 2009-02-24 01:58:00 +00:00
Dan Gohman
3a3b51162b Preserve the DominanceFrontier analysis in the LoopDeletion pass. 
llvm-svn: 65359
 2009-02-24 01:21:53 +00:00
Devang Patel
49b26ded5d gdb uses DW_AT_prototyped to identify K&R style in C based languages. 
This fixes objc.dg/dwarf-prototypes.m scan-assembler DW_AT_prototyped from llvmgcc42 test suite.

llvm-svn: 65357
 2009-02-24 00:52:19 +00:00
Bill Wendling
0d306fc85f Un-XFAIL this test. 
llvm-svn: 65355
 2009-02-24 00:37:28 +00:00
Devang Patel
702836b2dd While folding unconditional return move DbgRegionEndInst into the predecessor, instead of removing it. This fixes following tests from llvmgcc42 testsuite. 
gcc.c-torture/execute/20000605-3.c
gcc.c-torture/execute/20020619-1.c
gcc.c-torture/execute/20030920-1.c
gcc.c-torture/execute/loop-ivopts-1.c

llvm-svn: 65353
 2009-02-24 00:05:16 +00:00
Devang Patel
98ea831c24 If there is not any debug info available for any global variables and any subprograms then there is not any debug info to emit. 
llvm-svn: 65352
 2009-02-24 00:02:15 +00:00
Dan Gohman
1d93a1d2cb Back out the change in 64918 that used sign-extensions when promoting 
trip counts that use signed comparisons. It's not obviously the best
approach for preserving trip count information, and at any rate there
isn't anything in the tree right now that makes use of that, so for
now always using zero-extensions is preferable.

llvm-svn: 65347
 2009-02-23 23:20:35 +00:00
Dan Gohman
3766eeea36 Fast-isel can't do TLS yet, so it should fall back to SDISel 
if it sees TLS addresses.

llvm-svn: 65341
 2009-02-23 22:03:08 +00:00
Ted Kremenek
d5ea51e615 Correctly implement ImmutableMap::getMaxElement() by getting the actual <key, value> pair. 
llvm-svn: 65327
 2009-02-23 17:28:16 +00:00
Ted Kremenek
d8c425b68d Add ImmutableMap::getMaxElement(), a method that returns the <key,value> pair in a ImmutableMap that has the highest ranked key. 
llvm-svn: 65326
 2009-02-23 17:27:18 +00:00
Dan Gohman
f7d0d6fe22 LoopDeletion needs to inform ScalarEvolution when a loop is deleted, 
so that ScalarEvolution doesn't hang onto a dangling Loop*, which
could be a problem if another Loop happens to get allocated at the
same address.

llvm-svn: 65323
 2009-02-23 17:10:29 +00:00
Dan Gohman
c1229a3a86 Use the -stack-alignment option instead of using a target triple 
for avoiding dynamic stack realignment.

llvm-svn: 65319
 2009-02-23 16:34:46 +00:00
Dan Gohman
67530bbc77 IndVarSimplify preserves ScalarEvolution. In the 
-std-compile-opts sequence, this avoids the need for ScalarEvolution to
be rerun before LoopDeletion.

llvm-svn: 65318
 2009-02-23 16:29:41 +00:00
Zhou Sheng
39e360095e Add test case for checkin @r65314. 
llvm-svn: 65315
 2009-02-23 10:15:04 +00:00
Zhou Sheng
d3008c8b1c Should reset DBI_Prev if DBI_Next == 0. 
llvm-svn: 65314
 2009-02-23 10:14:11 +00:00
Evan Cheng
dd139e795c Only v1i16 (i.e. _m64) is returned via RAX / RDX. 
llvm-svn: 65313
 2009-02-23 09:03:22 +00:00
Nate Begeman
7d9e99560f Make this test use darwin targe triple, to avoid stack traffic on linux. 
llvm-svn: 65312
 2009-02-23 09:03:06 +00:00
Nate Begeman
e0093d2501 Generate better code for v8i16 shuffles on SSE2 
Generate better code for v16i8 shuffles on SSE2 (avoids stack)
Generate pshufb for v8i16 and v16i8 shuffles on SSSE3 where it is fewer uops.
Document the shuffle matching logic and add some FIXMEs for later further
  cleanups.
New tests that test the above.

Examples:

New:
_shuf2:
	pextrw	$7, %xmm0, %eax
	punpcklqdq	%xmm1, %xmm0
	pshuflw	$128, %xmm0, %xmm0
	pinsrw	$2, %eax, %xmm0

Old:
_shuf2:
	pextrw	$2, %xmm0, %eax
	pextrw	$7, %xmm0, %ecx
	pinsrw	$2, %ecx, %xmm0
	pinsrw	$3, %eax, %xmm0
	movd	%xmm1, %eax
	pinsrw	$4, %eax, %xmm0
	ret

=========

New:
_shuf4:
	punpcklqdq	%xmm1, %xmm0
	pshufb	LCPI1_0, %xmm0

Old:
_shuf4:
	pextrw	$3, %xmm0, %eax
	movsd	%xmm1, %xmm0
	pextrw	$3, %xmm1, %ecx
	pinsrw	$4, %ecx, %xmm0
	pinsrw	$5, %eax, %xmm0

========

New:
_shuf1:
	pushl	%ebx
	pushl	%edi
	pushl	%esi
	pextrw	$1, %xmm0, %eax
	rolw	$8, %ax
	movd	%xmm0, %ecx
	rolw	$8, %cx
	pextrw	$5, %xmm0, %edx
	pextrw	$4, %xmm0, %esi
	pextrw	$3, %xmm0, %edi
	pextrw	$2, %xmm0, %ebx
	movaps	%xmm0, %xmm1
	pinsrw	$0, %ecx, %xmm1
	pinsrw	$1, %eax, %xmm1
	rolw	$8, %bx
	pinsrw	$2, %ebx, %xmm1
	rolw	$8, %di
	pinsrw	$3, %edi, %xmm1
	rolw	$8, %si
	pinsrw	$4, %esi, %xmm1
	rolw	$8, %dx
	pinsrw	$5, %edx, %xmm1
	pextrw	$7, %xmm0, %eax
	rolw	$8, %ax
	movaps	%xmm1, %xmm0
	pinsrw	$7, %eax, %xmm0
	popl	%esi
	popl	%edi
	popl	%ebx
	ret

Old:
_shuf1:
	subl	$252, %esp
	movaps	%xmm0, (%esp)
	movaps	%xmm0, 16(%esp)
	movaps	%xmm0, 32(%esp)
	movaps	%xmm0, 48(%esp)
	movaps	%xmm0, 64(%esp)
	movaps	%xmm0, 80(%esp)
	movaps	%xmm0, 96(%esp)
	movaps	%xmm0, 224(%esp)
	movaps	%xmm0, 208(%esp)
	movaps	%xmm0, 192(%esp)
	movaps	%xmm0, 176(%esp)
	movaps	%xmm0, 160(%esp)
	movaps	%xmm0, 144(%esp)
	movaps	%xmm0, 128(%esp)
	movaps	%xmm0, 112(%esp)
	movzbl	14(%esp), %eax
	movd	%eax, %xmm1
	movzbl	22(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm1, %xmm2
	movzbl	42(%esp), %eax
	movd	%eax, %xmm1
	movzbl	50(%esp), %eax
	movd	%eax, %xmm3
	punpcklbw	%xmm1, %xmm3
	punpcklbw	%xmm2, %xmm3
	movzbl	77(%esp), %eax
	movd	%eax, %xmm1
	movzbl	84(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm1, %xmm2
	movzbl	104(%esp), %eax
	movd	%eax, %xmm1
	punpcklbw	%xmm1, %xmm0
	punpcklbw	%xmm2, %xmm0
	movaps	%xmm0, %xmm1
	punpcklbw	%xmm3, %xmm1
	movzbl	127(%esp), %eax
	movd	%eax, %xmm0
	movzbl	135(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm0, %xmm2
	movzbl	155(%esp), %eax
	movd	%eax, %xmm0
	movzbl	163(%esp), %eax
	movd	%eax, %xmm3
	punpcklbw	%xmm0, %xmm3
	punpcklbw	%xmm2, %xmm3
	movzbl	188(%esp), %eax
	movd	%eax, %xmm0
	movzbl	197(%esp), %eax
	movd	%eax, %xmm2
	punpcklbw	%xmm0, %xmm2
	movzbl	217(%esp), %eax
	movd	%eax, %xmm4
	movzbl	225(%esp), %eax
	movd	%eax, %xmm0
	punpcklbw	%xmm4, %xmm0
	punpcklbw	%xmm2, %xmm0
	punpcklbw	%xmm3, %xmm0
	punpcklbw	%xmm1, %xmm0
	addl	$252, %esp
	ret

llvm-svn: 65311
 2009-02-23 08:49:38 +00:00
Nick Lewycky
8b33f0ef05 If nobody minds, I'm using LTO to produce faster binaries. Switch fast codegen 
off in libLTO.

llvm-svn: 65310
 2009-02-23 07:41:55 +00:00
Mon P Wang
75d957dba4 Changed option name from inline-threshold to basic-inline-threshold because 
inline-threshold option is used by the inliner.

llvm-svn: 65309
 2009-02-23 07:07:56 +00:00
Chris Lattner
29437eb4c3 fix some typos that Duncan noticed 
llvm-svn: 65306
 2009-02-23 05:56:17 +00:00
Bill Wendling
3151437f5c Propagate debug loc info through prologue/epilogue. 
llvm-svn: 65298
 2009-02-23 00:42:30 +00:00
Scott Michel
3f8637305f Introduce the BuildVectorSDNode class that encapsulates the ISD::BUILD_VECTOR 
instruction. The class also consolidates the code for detecting constant
splats that's shared across PowerPC and the CellSPU backends (and might be
useful for other backends.) Also introduces SelectionDAG::getBUID_VECTOR() for
generating new BUILD_VECTOR nodes.

llvm-svn: 65296
 2009-02-22 23:36:09 +00:00
Nick Lewycky
9dc59d9c7b Add an option to the gold plugin to make it emit a file with the public api 
list that can in turn be passed to -internalize pass through
-internalize-public-api-file.

Pass gold -plugin-opt=generate-api-file to produce "apifile.txt" in the current
directory.

llvm-svn: 65295
 2009-02-22 22:15:44 +00:00
Dan Gohman
b105ab4e42 Revert the part of 64623 that attempted to align the source in a 
memcpy to match the alignment of the destination. It isn't necessary
for making loads and stores handled like the SSE loadu/storeu
intrinsics, and it was causing a performance regression in
MultiSource/Applications/JM/lencod.

The problem appears to have been a memcpy that copies from some
highly aligned array into an alloca; the alloca was then being
assigned a large alignment, which required codegen to perform
dynamic stack-pointer re-alignment, which forced the enclosing
function to have a frame pointer, which led to increased spilling.

llvm-svn: 65289
 2009-02-22 18:06:32 +00:00
Dan Gohman
a78fb41553 Properly parenthesize this expression, fixing a real bug in the new 
-full-lsr code, as well as a GCC warning.

llvm-svn: 65288
 2009-02-22 16:40:52 +00:00
Richard Pennington
72dc7c621e bug 3610: Test case. 
llvm-svn: 65287
 2009-02-22 15:54:44 +00:00
Evan Cheng
41687ff389 If a use operand is marked isKill, don't forget to add kill to its live interval as well. 
llvm-svn: 65279
 2009-02-22 08:35:56 +00:00
Evan Cheng
3ea8bd42f3 Add a note. 
llvm-svn: 65275
 2009-02-22 08:13:45 +00:00
Evan Cheng
4385f393f7 Be bug compatible with gcc by returning MMX values in RAX. 
llvm-svn: 65274
 2009-02-22 08:05:12 +00:00
Evan Cheng
9d9688ec15 Do not consider MMX_MOVD64rr a move instructions. The source register is in GR32, the destination is VR64. They are not compatible. 
llvm-svn: 65273
 2009-02-22 08:04:23 +00:00