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Author SHA1 Message Date
Michael J. Spencer
244b426701 Support/FileSystem: Add directory_iterator implementation. 
llvm-svn: 120989
 2010-12-06 04:28:42 +00:00
Michael J. Spencer
36a2df800d Support/PathV2: Fix append to not add a slash to empty or root paths. 
llvm-svn: 120988
 2010-12-06 04:28:23 +00:00
Michael J. Spencer
61043e9f3a Support/Windows: Add ScopedHandle and move some clients over to it. 
llvm-svn: 120987
 2010-12-06 04:28:13 +00:00
Che-Liang Chiou
cd2878d421 ptx: add shift instructions 
llvm-svn: 120982
 2010-12-06 04:00:03 +00:00
Rafael Espindola
0ba01a5b5c Remove the getAddress getter, initialize Ordinal in the constructor and use 
that on the ELF writer to detect a section we created.

llvm-svn: 120981
 2010-12-06 03:48:09 +00:00
Rafael Espindola
bf001eed4c Simplify a bit. 
llvm-svn: 120980
 2010-12-06 03:36:43 +00:00
Rafael Espindola
d361a448af Use getSymbolOffset on the COFF writer. 
llvm-svn: 120979
 2010-12-06 03:24:04 +00:00
Rafael Espindola
f56c11276e Don't use PadSectionToAlignment on windows. 
llvm-svn: 120978
 2010-12-06 03:03:44 +00:00
Rafael Espindola
1b2090ef24 Add a getSymbolOffset method and use it in the ELF writer. 
llvm-svn: 120977
 2010-12-06 02:57:26 +00:00
Chris Lattner
db6c348f31 Fix PR8728, a miscompilation I recently introduced. When optimizing 
memcpy's like:
  memcpy(A, B)
  memcpy(A, C)

we cannot delete the first memcpy as dead if A and C might be aliases.
If so, we actually get:

  memcpy(A, B)
  memcpy(A, A)

which is not correct to transform into:

  memcpy(A, A)

This patch was heavily influenced by Jakub Staszak's patch in PR8728, thanks
Jakub!

llvm-svn: 120974
 2010-12-06 01:48:06 +00:00
Evan Cheng
4d9d54e44e Eliminate unneeded #include's. 
llvm-svn: 120971
 2010-12-05 23:41:43 +00:00
NAKAMURA Takumi
594d4094ca ARM/CMakeLists.txt: Add missing MLxExpansionPass.cpp since r120960. 
llvm-svn: 120966
 2010-12-05 23:08:57 +00:00
Evan Cheng
12561e250d Code clean up. 
llvm-svn: 120965
 2010-12-05 23:03:45 +00:00
Evan Cheng
854ec53564 Remove an unused variable. 
llvm-svn: 120964
 2010-12-05 23:03:35 +00:00
Cameron Zwarich
f56ba80bb2 Some cleanup before I start committing some incremental progress on 
StrongPHIElimination.

llvm-svn: 120961
 2010-12-05 22:34:08 +00:00
Evan Cheng
fc78767730 Making use of VFP / NEON floating point multiply-accumulate / subtraction is 
difficult on current ARM implementations for a few reasons.
1. Even though a single vmla has latency that is one cycle shorter than a pair
   of vmul + vadd, a RAW hazard during the first (4? on Cortex-a8) can cause
   additional pipeline stall. So it's frequently better to single codegen
   vmul + vadd.
2. A vmla folowed by a vmul, vmadd, or vsub causes the second fp instruction to
   stall for 4 cycles. We need to schedule them apart.
3. A vmla followed vmla is a special case. Obvious issuing back to back RAW
   vmla + vmla is very bad. But this isn't ideal either:
     vmul
     vadd
     vmla
   Instead, we want to expand the second vmla:
     vmla
     vmul
     vadd
   Even with the 4 cycle vmul stall, the second sequence is still 2 cycles
   faster.

Up to now, isel simply avoid codegen'ing fp vmla / vmls. This works well enough
but it isn't the optimial solution. This patch attempts to make it possible to
use vmla / vmls in cases where it is profitable.

A. Add missing isel predicates which cause vmla to be codegen'ed.
B. Make sure the fmul in (fadd (fmul)) has a single use. We don't want to
   compute a fmul and a fmla.
C. Add additional isel checks for vmla, avoid cases where vmla is feeding into
   fp instructions (except for the #3 exceptional case).
D. Add ARM hazard recognizer to model the vmla / vmls hazards.
E. Add a special pre-regalloc case to expand vmla / vmls when it's likely the
   vmla / vmls will trigger one of the special hazards.

Work in progress, only A+B are enabled.

llvm-svn: 120960
 2010-12-05 22:04:16 +00:00
Cameron Zwarich
f64c26bb9e Remove the PHIElimination.h header, as it is no longer needed. 
llvm-svn: 120959
 2010-12-05 21:39:42 +00:00
Frits van Bommel
e390b379ae Fix PR 4170 by having ExtractValueInst::getIndexedType() reject out-of-bounds indexing. 
Also add asserts that the indices are valid in InsertValueInst::init(). ExtractValueInst already asserts when constructed with invalid indices.

llvm-svn: 120956
 2010-12-05 20:50:26 +00:00
Cameron Zwarich
fbe9e91d97 I forgot to actually remove the FindCopyInsertPoint() declaration from 
PHIElimination.h.

llvm-svn: 120953
 2010-12-05 19:58:57 +00:00
Cameron Zwarich
cb613dcf69 Remove the SplitCriticalEdge() method declaration from PHIElimination.h. At one 
time, this method existed, but now PHIElimination uses the method of the same
name on MachineBasicBlock.

llvm-svn: 120952
 2010-12-05 19:54:23 +00:00
Cameron Zwarich
c680f44c1b Move the FindCopyInsertPoint method of PHIElimination to a new standalone 
function so that it can be shared with StrongPHIElimination.

llvm-svn: 120951
 2010-12-05 19:51:05 +00:00
Frits van Bommel
b95594885e Refactor jump threading. 
Should have no functional change other than the order of two transformations that are mutually-exclusive and the exact formatting of debug output.
Internally, it now stores the ConstantInt*s as Constant*s, and actual undef values instead of nulls.

llvm-svn: 120946
 2010-12-05 19:06:41 +00:00
Frits van Bommel
4f39797ac2 Remove trailing whitespace. 
llvm-svn: 120945
 2010-12-05 19:02:47 +00:00
Frits van Bommel
31cf7b99f9 Teach SimplifyCFG to turn 
(indirectbr (select cond, blockaddress(@fn, BlockA),
                            blockaddress(@fn, BlockB)))
into
  (br cond, BlockA, BlockB).

llvm-svn: 120943
 2010-12-05 18:29:03 +00:00
Chris Lattner
e30adfb732 Teach X86ISelLowering that the second result of X86ISD::UMUL is a flags 
result.  This allows us to compile:

void *test12(long count) {
      return new int[count];
}

into:

test12:
	movl	$4, %ecx
	movq	%rdi, %rax
	mulq	%rcx
	movq	$-1, %rdi
	cmovnoq	%rax, %rdi
	jmp	__Znam                  ## TAILCALL

instead of:

test12:
	movl	$4, %ecx
	movq	%rdi, %rax
	mulq	%rcx
	seto	%cl
	testb	%cl, %cl
	movq	$-1, %rdi
	cmoveq	%rax, %rdi
	jmp	__Znam

Of course it would be even better if the regalloc inverted the cmov to 'cmovoq',
which would eliminate the need for the 'movq %rdi, %rax'.

llvm-svn: 120936
 2010-12-05 07:49:54 +00:00
Chris Lattner
76601e7a99 it turns out that when ".with.overflow" intrinsics were added to the X86 
backend that they were all implemented except umul.  This one fell back
to the default implementation that did a hi/lo multiply and compared the
top.  Fix this to check the overflow flag that the 'mul' instruction
sets, so we can avoid an explicit test.  Now we compile:

void *func(long count) {
      return new int[count];
}

into:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	seto	%cl                     ## encoding: [0x0f,0x90,0xc1]
	testb	%cl, %cl                ## encoding: [0x84,0xc9]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL

instead of:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	testq	%rdx, %rdx              ## encoding: [0x48,0x85,0xd2]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL

Other than the silly seto+test, this is using the o bit directly, so it's going in the right
direction.

llvm-svn: 120935
 2010-12-05 07:30:36 +00:00
Chris Lattner
16bafb2414 generalize the previous check to handle -1 on either side of the 
select, inserting a not to compensate.  Add a missing isZero check
that I lost somehow.

This improves codegen of:

void *func(long count) {
      return new int[count];
}

from:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	testq	%rdx, %rdx              ## encoding: [0x48,0x85,0xd2]
	movq	$-1, %rdi               ## encoding: [0x48,0xc7,0xc7,0xff,0xff,0xff,0xff]
	cmoveq	%rax, %rdi              ## encoding: [0x48,0x0f,0x44,0xf8]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]

to:

__Z4funcl:                              ## @_Z4funcl
	movl	$4, %ecx                ## encoding: [0xb9,0x04,0x00,0x00,0x00]
	movq	%rdi, %rax              ## encoding: [0x48,0x89,0xf8]
	mulq	%rcx                    ## encoding: [0x48,0xf7,0xe1]
	cmpq	$1, %rdx                ## encoding: [0x48,0x83,0xfa,0x01]
	sbbq	%rdi, %rdi              ## encoding: [0x48,0x19,0xff]
	notq	%rdi                    ## encoding: [0x48,0xf7,0xd7]
	orq	%rax, %rdi              ## encoding: [0x48,0x09,0xc7]
	jmp	__Znam                  ## TAILCALL
                                        ## encoding: [0xeb,A]

llvm-svn: 120932
 2010-12-05 02:00:51 +00:00
Chris Lattner
474ed0aa9b Improve an integer select optimization in two ways: 
1. generalize 
    (select (x == 0), -1, 0) -> (sign_bit (x - 1))
to:
    (select (x == 0), -1, y) -> (sign_bit (x - 1)) | y

2. Handle the identical pattern that happens with !=:
   (select (x != 0), y, -1) -> (sign_bit (x - 1)) | y

cmov is often high latency and can't fold immediates or
memory operands.  For example for (x == 0) ? -1 : 1, before 
we got:

< 	testb	%sil, %sil
< 	movl	$-1, %ecx
< 	movl	$1, %eax
< 	cmovel	%ecx, %eax

now we get:

> 	cmpb	$1, %sil
> 	sbbl	%eax, %eax
> 	orl	$1, %eax

llvm-svn: 120929
 2010-12-05 01:23:24 +00:00
Bill Wendling
2b53c0830d Initialize HasPOPCNT. 
llvm-svn: 120923
 2010-12-04 23:57:24 +00:00
Rafael Espindola
310b851621 Once the layout is done we don't need to keep updating which fragments are 
valid. Addresses will not change.

llvm-svn: 120921
 2010-12-04 22:47:22 +00:00
Rafael Espindola
1bf8d261f1 Remember the contents of leb and dwarfline fragments when relaxing. This avoids 
having to evaluate the expression again when writing.

llvm-svn: 120920
 2010-12-04 21:58:52 +00:00
Cameron Zwarich
5e3c712e67 Remove PHIElimination's private copy of SkipPHIsAndLabels. 
llvm-svn: 120918
 2010-12-04 20:40:15 +00:00
Benjamin Kramer
851691ddb2 Add patterns for the x86 popcnt instruction. 
- Also adds a new POPCNT subtarget feature that is currently enabled if the target
  supports SSE4.2 (nehalem) or SSE4A (barcelona).

llvm-svn: 120917
 2010-12-04 20:32:23 +00:00
Bill Wendling
18e834f217 Silence 'may be used uninitialized in this function' warnings. Static analysis 
may determine that they cannot be used uninitialized. But that might be a bit
too much for the compiler to determine.

llvm-svn: 120916
 2010-12-04 20:20:34 +00:00
Michael J. Spencer
2cd429339f Support/PathV2: Remove redundant calls to make_error_code. 
llvm-svn: 120913
 2010-12-04 18:45:32 +00:00
Benjamin Kramer
e2e8053264 APInt: microoptimize a few methods. 
llvm-svn: 120912
 2010-12-04 18:05:36 +00:00
Benjamin Kramer
009451fddc Remove unneeded zero arrays. 
llvm-svn: 120910
 2010-12-04 15:28:22 +00:00
Benjamin Kramer
612c7225ee Apparently APFloat::getZero doesn't like PPCDoubleDoubles. 
llvm-svn: 120909
 2010-12-04 14:43:08 +00:00
Benjamin Kramer
77faee6ba1 Simplify code. No functionality change. 
llvm-svn: 120907
 2010-12-04 14:22:24 +00:00
Bob Wilson
20c65a9d33 The Thumb tADDrSPi instruction is not valid when the destination is SP. 
Check for that and try narrowing it to tADDspi instead.  Radar 8724703.

llvm-svn: 120892
 2010-12-04 04:40:19 +00:00
Rafael Espindola
9215947c83 There are two reasons why we might want to use 
foo = a - b
.long foo
instead of just
.long a - b

First, on darwin9 64 bits the assembler produces the wrong result. Second,
if "a" is the end of the section all darwin assemblers (9, 10 and mc) will not
consider a - b to be a constant but will if the dummy foo is created.

Split how we handle these cases. The first one is something MC should take care
of. The second one has to be handled by the caller.

llvm-svn: 120889
 2010-12-04 03:21:47 +00:00
Michael J. Spencer
5a2272dcef Support/FileSystem: Add status implementation. 
llvm-svn: 120870
 2010-12-04 00:32:40 +00:00
Michael J. Spencer
090a4bd632 Support/Windows/FileSystem: Fix MinGW warnings. 
llvm-svn: 120868
 2010-12-04 00:32:14 +00:00
Michael J. Spencer
e1360680ce Support/FileSystem: Add file_size implementation. 
llvm-svn: 120867
 2010-12-04 00:31:48 +00:00
Rafael Espindola
50b6170457 Next step: Only pad debug_line when the target is darwin. Add a FIXME to avoid 
doing that if the target is darwin10 or newer.

This fixes
*) Direct object emission was producing objects without the workaround on
   darwin9.
*) Assembly printing was producing objects with the workaround on linux.

llvm-svn: 120866
 2010-12-04 00:31:13 +00:00
Jim Grosbach
4c10ffa7c3 Encode condition code for Thumb1 conditional branch instruction. 
llvm-svn: 120865
 2010-12-04 00:20:40 +00:00
Jim Grosbach
1dac8796d5 Correctly size-reduce the t2CMPzrr instruction to tCMPzr when possible. 
tCMPzhir has undefined behavior when both source registers are low registers.
rdar://8728577

llvm-svn: 120858
 2010-12-03 23:54:18 +00:00
Bill Wendling
7e27f17312 Use correct variable names to match the patterns. 
llvm-svn: 120857
 2010-12-03 23:44:24 +00:00
Jakob Stoklund Olesen
6f535251de Also inore '()' while creating mdnode name from ObjC symbol name. 
llvm-svn: 120856
 2010-12-03 23:40:45 +00:00
Rafael Espindola
4145acdc3b First step in fixing MC. Make it clear that we are avoiding a bug in the 
darwin9 linker, what is needed to avoid it and where to get more information.

Also make the workaround simpler. Just the regular end_sequence we normally
create is more than 4 bytes.

Tested by building cctools and ld64 from darwin9 on a darwin10 system and using
those. I checked that I was able to reproduce the bootstrap failure when
the the workaround was disabled.

llvm-svn: 120854
 2010-12-03 23:36:59 +00:00
Devang Patel
fdc570cad4 Ignore '+' while creating mdnode name from ObjC symbol name. 
llvm-svn: 120853
 2010-12-03 23:29:30 +00:00
Jim Grosbach
3b5c857f01 Match pattern operand names to expected encoding field names. This corrects the 
operand encoding ordering of the instruction.

llvm-svn: 120852
 2010-12-03 23:21:25 +00:00
Jim Grosbach
dbefb3e7e5 Remove incorrect BL target encoding (it's similar to, but not the same as the 
ARM instruction). Add encoding of bits 13 and 11.

llvm-svn: 120849
 2010-12-03 22:33:42 +00:00
Jim Grosbach
8cef570ed9 Encode the 32-bit wide Thumb (and Thumb2) instructions with the high order 
halfword being emitted to the stream first. rdar://8728174

llvm-svn: 120848
 2010-12-03 22:31:40 +00:00
Nate Begeman
d4310b6d7c Revert this change since it breaks a couple of the AVX tests. 
I'm unclear if the tests are actually correct or not, but reverting for now.

llvm-svn: 120847
 2010-12-03 22:29:15 +00:00
Jakob Stoklund Olesen
8ed86d7fd3 Rename virtRegMap to avoid confusion with the VirtRegMap that it isn't. 
llvm-svn: 120846
 2010-12-03 22:25:09 +00:00
Jakob Stoklund Olesen
8b893e3575 Coalesce debug locations when possible, causing less DBG_VALUE instructions to 
be emitted.

llvm-svn: 120845
 2010-12-03 22:25:07 +00:00
Nate Begeman
deb26223bd Scalar f32/f64 are also subregs of ymm regs 
llvm-svn: 120844
 2010-12-03 21:54:39 +00:00
Nate Begeman
3911dcfd71 Remove SSE1-4 disable when AVX is enabled. While this may be useful for development, 
it completely breaks scalar fp in xmm regs when AVX is enabled.

llvm-svn: 120843
 2010-12-03 21:54:14 +00:00
Jakob Stoklund Olesen
c18ef29bc6 Emit DBG_VALUE instructions from LiveDebugVariables. 
llvm-svn: 120842
 2010-12-03 21:47:10 +00:00
Jakob Stoklund Olesen
1d753a5f7f Also update virtRegMap when renaming virtual registers. 
llvm-svn: 120841
 2010-12-03 21:47:08 +00:00
Jim Grosbach
c69ad2176a When using the 'push' mnemonic for Thumb2 stmdb, be explicit when it's the 
32-bit wide version by adding the .w suffix.

llvm-svn: 120838
 2010-12-03 20:33:01 +00:00
Benjamin Kramer
e27eff8888 Remove unused variable. 
llvm-svn: 120836
 2010-12-03 19:55:37 +00:00
Jim Grosbach
c8ce9a3453 Reduce t2 ldr/str instructions to the correct t1 versions when there's an 
immediate offset.

llvm-svn: 120833
 2010-12-03 19:47:11 +00:00
Jason W Kim
27bbab7e31 fix ARM::fixup_arm_branch, cleanup, and share more code between ELF and Darwin 
llvm-svn: 120832
 2010-12-03 19:40:23 +00:00
Jim Grosbach
25da270139 No need to declare EncoderMethod property anymore; just assign to it. 
llvm-svn: 120831
 2010-12-03 19:31:00 +00:00
Jakob Stoklund Olesen
1ec6a68038 Delete the StrongPHIElimination pass, leaving only a shell. 
The StrongPHIElimination pass did not work, and nobody has worked on it for two
years.

A rewrite is underway, so I am leaving this shell pass instead of deleting it
completely.

llvm-svn: 120830
 2010-12-03 19:21:53 +00:00
Jakob Stoklund Olesen
4cd667151d Add IntervalMap::iterator::set{Start,Stop,Value} methods that allow limited 
editing of the current interval.

These methods may cause coalescing, there are corresponding set*Unchecked
methods for editing without coalescing. The non-coalescing methods are useful
for applying monotonic transforms to all keys or values in a map without
accidentally coalescing transformed and untransformed intervals.

llvm-svn: 120829
 2010-12-03 19:02:00 +00:00
Michael J. Spencer
6cf89ea23a Support/FileSystem: Add equivalent implementation. 
llvm-svn: 120827
 2010-12-03 18:49:13 +00:00
Michael J. Spencer
ce950c50c4 Support/FileSystem: Fix MinGW build. It doesn't have _chsize_s. 
llvm-svn: 120826
 2010-12-03 18:48:56 +00:00
Jim Grosbach
d0db6c9f0e Add FIXMEs. 
llvm-svn: 120824
 2010-12-03 18:37:17 +00:00
Jim Grosbach
dca34b5da7 Size reduction for tPUSH come from t2STMDB_UPD, not t2STMIA_UPD. 
llvm-svn: 120822
 2010-12-03 18:31:03 +00:00
Michael J. Spencer
60c2f39a49 And I really hate line endings. 
llvm-svn: 120821
 2010-12-03 18:04:11 +00:00
Michael J. Spencer
94cf759d48 Support/Windows/FileSystem: Fix MinGW build. 
llvm-svn: 120820
 2010-12-03 18:03:28 +00:00
Michael J. Spencer
a0346605ae Support/FileSystem: Add resize_file implementation. 
llvm-svn: 120819
 2010-12-03 17:54:07 +00:00
Michael J. Spencer
ba3176e790 Support/FileSystem: Add rename implementation. 
llvm-svn: 120818
 2010-12-03 17:53:55 +00:00
Michael J. Spencer
1d9a2b7541 Support/FileSystem: Add remove implementation. 
llvm-svn: 120817
 2010-12-03 17:53:43 +00:00
Michael J. Spencer
8c7c12a74e Fix line endings. 
llvm-svn: 120816
 2010-12-03 17:53:23 +00:00
Eric Christopher
25f7b89a9e Apparently OS X 10.4 doesn't have __crashreporter_info__. 
Try to fix building on the wayback machine.

llvm-svn: 120801
 2010-12-03 07:45:22 +00:00
Michael J. Spencer
98d9d1509e Support/FileSystem: Add create_symlink implementation. 
llvm-svn: 120800
 2010-12-03 07:41:25 +00:00
Michael J. Spencer
efc69d250d Support/FileSystem: Add create_hard_link implementation. 
llvm-svn: 120792
 2010-12-03 05:58:41 +00:00
Michael J. Spencer
5328e94513 Support/ADT/Twine: Make toNullTerminatedStringRef not rely on UB :(. 
llvm-svn: 120791
 2010-12-03 05:42:25 +00:00
Michael J. Spencer
96236c93ff Support/FileSystem: Add create_director{y,ies} implementations. 
llvm-svn: 120790
 2010-12-03 05:42:11 +00:00
Rafael Espindola
ec560cdae3 Make EmitIntValue more efficient and more like what we do for leb128. The 
difference is much smaller (about 0.3s) but significant.

llvm-svn: 120787
 2010-12-03 02:54:21 +00:00
Bill Wendling
b7df584ef7 Don't overwrite the opcode passed into the T1Special pattern. 
llvm-svn: 120782
 2010-12-03 02:02:58 +00:00
Bill Wendling
c4858cb4c3 Add Thumb encoding for some more instructions. 
llvm-svn: 120780
 2010-12-03 01:55:47 +00:00
Michael J. Spencer
d9f355beb0 Support/Windows/FileSystem: Remove unneeded toNullTerminatedStringRef. 
llvm-svn: 120777
 2010-12-03 01:21:38 +00:00
Michael J. Spencer
4e1623c715 Support/FileSystem: Add unique_file and exists implementations. 
llvm-svn: 120776
 2010-12-03 01:21:28 +00:00
Rafael Espindola
dc103b1755 Do with uleb the same trick we now do with dwarf line/address advances. This 
avoids creating leb128 fragments and speeds up the test in PR8711 to 33s.

llvm-svn: 120774
 2010-12-03 01:19:49 +00:00
Rafael Espindola
3e119b0bb4 Try to resolve symbol differences early, and if successful create a plain 
data fragment. This reduces the time to assemble the test in 8711 from 60s to
54s.

llvm-svn: 120767
 2010-12-03 00:55:40 +00:00
Bill Wendling
2f6a820abe The tLDR instruction wasn't encoded properly: 
<MCInst 2251 <MCOperand Reg:70> <MCOperand Reg:66> <MCOperand Imm:0> <MCOperand Reg:0> <MCOperand Imm:14> <MCOperand Reg:0>>

Notice that the "reg" here is 0, which is an invalid register. Put a check in
the code for this to prevent crashing.

llvm-svn: 120766
 2010-12-03 00:53:22 +00:00
Devang Patel
77a1457f1a It may not be an option to skip .debug_line if there are file reference in already emitted debug info. So, for now, emit dummy line table entry to make older linker and assemblers happy. This is not a new behavior, original AsmPrinter emitted similar line table entries. 
llvm-svn: 120760
 2010-12-03 00:10:48 +00:00
Jim Grosbach
0bd3b0fd6c Trailing whitespace. 
llvm-svn: 120748
 2010-12-02 23:05:38 +00:00
Devang Patel
822facd787 Use set directive for StartMinusEndExpr. 
This is a fix for llvm-gcc-i386-darwin9 buildbot failure.

llvm-svn: 120742
 2010-12-02 21:32:30 +00:00
Jakob Stoklund Olesen
08f52108b1 Update LiveDebugVariables during coalescing. 
llvm-svn: 120720
 2010-12-02 18:15:44 +00:00
Jim Grosbach
b6d0c8d5b1 When expanding the MOVCCi32imm, make sure to use the ARM movt/movw opcodes, 
not thumb2.

llvm-svn: 120711
 2010-12-02 16:42:25 +00:00
Jim Grosbach
78ef3199c8 Fix copy/pasto in vmin.f32 encoding. 
llvm-svn: 120709
 2010-12-02 16:30:58 +00:00
Wesley Peck
09a4bffe09 Teaching MBlaze backend how to reverse branch conditions. 
llvm-svn: 120707
 2010-12-02 16:17:11 +00:00
Rafael Espindola
922894345e Add a fast path to EvaluateSymbolicAdd. This avoids computing symbol addresses 
which then avoids running EnsureValid.
This cuts the assembly time of the testcase in PR8711 from 2:50 minutes to 1
minute.

llvm-svn: 120697
 2010-12-02 07:53:12 +00:00
Rafael Espindola
2dabc56340 Move EmitValueToOffset to the ObjectStreamer. 
llvm-svn: 120691
 2010-12-02 05:59:38 +00:00
Rafael Espindola
3bc5d20c38 Add EmitInstToFragment to the generic object streamer. 
llvm-svn: 120690
 2010-12-02 05:44:06 +00:00
Rafael Espindola
41bdd97d48 The sections that the ELF object writer has to create are very simple and 
contain only data. Handle them specially instead of using AddSectionToTheEnd.
This moves a hack from the generic assembler to the elf writer. It is also
a bit faster and should make other improvements easier.

llvm-svn: 120683
 2010-12-02 03:09:06 +00:00
Devang Patel
525de51e78 If tehre are not any line entry then do not try to emit .debug_line section. 
llvm-svn: 120637
 2010-12-02 01:17:51 +00:00
Jakob Stoklund Olesen
54b6cd6d38 Implement the first half of LiveDebugVariables. 
Scan the MachineFunction for DBG_VALUE instructions, and replace them with a
data structure similar to LiveIntervals. The live range of a DBG_VALUE is
determined by propagating it down the dominator tree until a new DBG_VALUE is
found. When a DBG_VALUE lives in a register, its live range is confined to the
live range of the register's value.

LiveDebugVariables runs before coalescing, so DBG_VALUEs are not artificially
extended when registers are joined.

The missing half will recreate DBG_VALUE instructions from the intervals when
register allocation is complete.

The pass is disabled by default. It can be enabled with the temporary command
line option -live-debug-variables.

llvm-svn: 120636
 2010-12-02 00:37:37 +00:00
Jim Grosbach
0e71db6919 Add support for binary encoding of ARM 'adr' instructions referencing constant 
pool entries (LEApcrel pseudo). Ongoing saga of rdar://8542291.

llvm-svn: 120635
 2010-12-02 00:28:45 +00:00
Devang Patel
409a5ff824 Revert r120580. 
llvm-svn: 120630
 2010-12-02 00:22:29 +00:00
Evan Cheng
4118b24aca Fix and re-enable tail call optimization of expanded libcalls. 
llvm-svn: 120622
 2010-12-01 22:59:46 +00:00
Rafael Espindola
c9af6aea7a Remove unused argument. 
llvm-svn: 120621
 2010-12-01 22:48:11 +00:00
Jason W Kim
7d4b30652e fixing style nit: move class static to global static 
llvm-svn: 120619
 2010-12-01 22:46:50 +00:00
Bill Wendling
d85ff071c0 Add a post encoder method to the VFP instructions to convert them to the Thumb2 
encoding if we're in that mode.

llvm-svn: 120608
 2010-12-01 21:54:50 +00:00
Jim Grosbach
b1b1ff4271 Use the correct fixup type for ARM VLDR* 
llvm-svn: 120604
 2010-12-01 21:09:40 +00:00
Rafael Espindola
16b64c646a Rename temporary symbols if they conflict with artificial symbols created 
by the assembler. This was blocking parsing any large .s produced by clang for
example.

Fixes PR8596.

llvm-svn: 120603
 2010-12-01 20:46:11 +00:00
Michael J. Spencer
8908ec62e4 Support/FileSystem: Fix copy_file implementation to use toNullTerminatedStringRef 
instead of toStringRef. The file system APIs need c strings.

llvm-svn: 120601
 2010-12-01 20:37:42 +00:00
Michael J. Spencer
03bbd0f21d Support/ADT/Twine: Add toNullTerminatedStringRef. 
llvm-svn: 120600
 2010-12-01 20:37:30 +00:00
Jim Grosbach
b2a12afa5f Refactor LEApcrelJT as a pseudo-instructionlowered to a cannonical ADR 
instruction at MC lowering. Add binary encoding information for the ADR,
including fixup data for the label operand.

llvm-svn: 120594
 2010-12-01 19:47:31 +00:00
Michael J. Spencer
42a5674c7a Support/FileSystem: Add copy_file implementation. Not tests yet because the 
file creation APIs aren't implemented.

llvm-svn: 120593
 2010-12-01 19:32:01 +00:00
Owen Anderson
8802c68592 Add correct encodings for STRD and LDRD, including fixup support. Additionally, update these to unified syntax. 
llvm-svn: 120589
 2010-12-01 19:18:46 +00:00
Jason W Kim
d468d24fc9 kill trailing space 
llvm-svn: 120586
 2010-12-01 19:07:22 +00:00
Jim Grosbach
538c57aeed Fix a mised reloc rename spot. 
llvm-svn: 120585
 2010-12-01 19:02:26 +00:00
Jim Grosbach
25b2b536f3 10 bits, not 12. 
llvm-svn: 120584
 2010-12-01 18:51:32 +00:00
Devang Patel
e68cb5a5cf Disable debug info for x86-darwin9 and earlier until PR 8715 and radar 8709290 are fixed. 
llvm-svn: 120580
 2010-12-01 16:59:34 +00:00
Duncan Sands
cd4f56b8e2 I don't think it makes any sense to assert that the target supports SSE3 here. 
The user (i.e. whoever generated a call to the intrinsic in the first place) is
essentially asking for a particular instruction to be placed in the assembler.
If that instruction won't execute on the target machine, that's their problem
not ours.  Two buildbots with processors that don't support SSE3 were barfing
on the apm.ll test in CodeGen/X86 because of this assertion.

llvm-svn: 120574
 2010-12-01 12:58:13 +00:00
Che-Liang Chiou
c61d8fa0e3 ptx: bug fix: use after free 
llvm-svn: 120571
 2010-12-01 11:45:53 +00:00
Jay Foad
789e8ac4f7 PR5207: Rename overloaded APInt methods set(), clear(), flip() to 
setAllBits(), setBit(unsigned), etc.

llvm-svn: 120564
 2010-12-01 08:53:58 +00:00
Michael J. Spencer
1796028f41 Support/PathV2: Add is_{absolute,relative} implementation. 
llvm-svn: 120560
 2010-12-01 06:21:53 +00:00
Michael J. Spencer
5aa4703418 Support/PathV2: Add has_{root_path,root_name,root_directory,parent_path,filename,stem,extension} implementation. 
llvm-svn: 120559
 2010-12-01 06:03:50 +00:00
Jim Grosbach
a3e6ffffe5 Elaborate on FIXME. 
llvm-svn: 120552
 2010-12-01 04:01:17 +00:00
Jim Grosbach
b2044fcba1 Move the ARMAsmPrinter class defintiion into a header file. 
llvm-svn: 120551
 2010-12-01 03:45:07 +00:00
Michael J. Spencer
f6333e887f Support/PathV2: Add extension implementation. 
llvm-svn: 120550
 2010-12-01 03:37:41 +00:00
Evan Cheng
84162760b7 Speculatively disable x86 portion of r120501 to appease the x86_64 buildbot. 
llvm-svn: 120549
 2010-12-01 03:27:20 +00:00
Michael J. Spencer
14039e9883 Support/PathV2: Add stem implementation. 
llvm-svn: 120547
 2010-12-01 03:18:33 +00:00
Michael J. Spencer
c3aaf36678 Support/PathV2: Add filename implementation. 
llvm-svn: 120546
 2010-12-01 03:18:17 +00:00
Bill Wendling
e62557dc3c Remove "comparison of integers of different signs" warning by making the 
variable unsigned.

llvm-svn: 120541
 2010-12-01 02:49:04 +00:00
Michael J. Spencer
4beee08409 Support/PathV2: Add native implementation. 
llvm-svn: 120539
 2010-12-01 02:48:27 +00:00
Dan Gohman
3ff3bc0c31 Delete Path::appendSuffix's return value; it wasn't used anywhere, which 
is fine since isn't really necessary to check isValid there anyway.

llvm-svn: 120538
 2010-12-01 02:46:41 +00:00
Bill Wendling
4fc1c4ee84 General cleanups of comments. 
llvm-svn: 120536
 2010-12-01 02:42:55 +00:00
Jason W Kim
4d960e071c ARM/MC/ELF relocation "hello world" for movw/movt. 
Lifted adjustFixupValue() from Darwin for sharing w ELF.
Test added
TODO:
  refactor ELFObjectWriter::RecordRelocation more.
  Possibly share more code with Darwin?
  Lots more relocations...

llvm-svn: 120534
 2010-12-01 02:40:06 +00:00
Bill Wendling
b7635b1ed3 Formatting. It's all the rage! 
llvm-svn: 120533
 2010-12-01 02:36:55 +00:00
Bill Wendling
8861fb7484 More refactoring. This time the T1pI pattern. 
llvm-svn: 120532
 2010-12-01 02:28:08 +00:00
Eric Christopher
5f7eeae6ba Refactor load/store handling again. Simplify and make some room for 
reg+reg handling.

llvm-svn: 120526
 2010-12-01 01:40:24 +00:00
Jan Wen Voung
c34fbc5bb1 Initialize an ARMConstantPoolValue field. 
llvm-svn: 120525
 2010-12-01 01:38:58 +00:00
Bill Wendling
ccfea264ff s/T1pIEncode/T1pILdStEncode/g 
s/T1pIEncodeImm/T1pILdStEncodeImm/g

llvm-svn: 120524
 2010-12-01 01:38:08 +00:00
Bill Wendling
517dd72f06 Renaming variables to coincide with documentation. No functionality change. 
llvm-svn: 120522
 2010-12-01 01:32:02 +00:00
Chris Lattner
c3112f1e94 fix a bozo bug I introduced in r119930, causing a miscompile of 
20040709-1.c from the gcc testsuite.  I was using the size of a
pointer instead of the pointee.  This fixes rdar://8713376

llvm-svn: 120519
 2010-12-01 01:24:55 +00:00
Bill Wendling
8ebed2442e Refactor T1sI and T1sIt encodings into helper classes. 
llvm-svn: 120518
 2010-12-01 01:20:15 +00:00
Michael J. Spencer
8d5c96c575 Support/PathV2: Add replace_extension implementation. 
llvm-svn: 120514
 2010-12-01 00:52:55 +00:00
Michael J. Spencer
5ac386d311 Support/PathV2: Add remove_filename implementation. 
llvm-svn: 120513
 2010-12-01 00:52:28 +00:00
Bill Wendling
60d0e1a06c Refactor the T1sIt encodings into a parent class to get rid of all of the "let" 
statements.

llvm-svn: 120512
 2010-12-01 00:48:44 +00:00
Owen Anderson
2299afbb49 Use by-name rather than by-order matching for NEON operands. 
llvm-svn: 120507
 2010-12-01 00:28:25 +00:00
Andrew Trick
a2cec41172 Comment typo. 
llvm-svn: 120504
 2010-11-30 23:59:50 +00:00
Evan Cheng
f7e586d749 Enable sibling call optimization of libcalls which are expanded during 
legalization time. Since at legalization time there is no mapping from
SDNode back to the corresponding LLVM instruction and the return
SDNode is target specific, this requires a target hook to check for
eligibility. Only x86 and ARM support this form of sibcall optimization
right now.
rdar://8707777

llvm-svn: 120501
 2010-11-30 23:55:39 +00:00
Bill Wendling
6a48b15c80 Rename operands to match ARM documentation. No functionality change. 
llvm-svn: 120500
 2010-11-30 23:54:45 +00:00
Jim Grosbach
c8c81941f6 Fix typo. 
llvm-svn: 120499
 2010-11-30 23:51:41 +00:00
Chris Lattner
c888f3ec58 Enhance DSE to handle the variable index case in PR8657. 
llvm-svn: 120498
 2010-11-30 23:43:23 +00:00
Jim Grosbach
ce4e8350aa Trailing whitespace. 
llvm-svn: 120497
 2010-11-30 23:29:24 +00:00
Michael J. Spencer
a10e76dd58 Support/PathV2: Implement reverse iteration and parent_path. 
llvm-svn: 120496
 2010-11-30 23:28:07 +00:00
Michael J. Spencer
090cf77d32 Support/ADT/StringRef: Add find_last_of. 
llvm-svn: 120495
 2010-11-30 23:27:35 +00:00
Jason W Kim
725321c3c7 Thanks to JimG for catching this! 
llvm-svn: 120494
 2010-11-30 23:27:18 +00:00
Andrew Trick
89dd5f7eac Coding style. No significant functionality. Abandon linear scan style 
in favor of the widespread llvm style. Capitalize variables and add
newlines for visual parsing. Rename variables for readability.
And other cleanup.

llvm-svn: 120490
 2010-11-30 23:18:47 +00:00
Bill Wendling
745e2de9dc Inline classes that were used in only one place. 
llvm-svn: 120488
 2010-11-30 23:16:25 +00:00
Chris Lattner
b9c5a6fa04 teach DSE to use GetPointerBaseWithConstantOffset to analyze 
may-aliasing stores that partially overlap with different base
pointers.  This implements PR6043 and the non-variable part of
PR8657

llvm-svn: 120485
 2010-11-30 23:05:20 +00:00
Bill Wendling
e85934f8a5 * Add support for encoding t_addrmode_s2 and t_addrmode_s1. They are the same as 
t_addrmode_s4, but with a different scaling factor.

* Encode the Thumb1 load and store instructions. This involved a bit of
  refactoring (hi, Chris! :-). Some of the patterns became dead afterwards and
  were removed.

llvm-svn: 120482
 2010-11-30 22:57:21 +00:00
Owen Anderson
5aff471eb8 Simplify the encoding of reg+/-imm12 values that allow PC-relative encoding. This allows the 
Thumb2 encoding to share code with the ARM encoding, which gets use fixup support for free.
It also allows us to fold away at least one codegen-only pattern.

llvm-svn: 120481
 2010-11-30 22:45:47 +00:00
Jim Grosbach
09095b4dd9 Fix handling of ARM negative pc-relative fixups for loads and stores. 
llvm-svn: 120480
 2010-11-30 22:40:36 +00:00
Chris Lattner
58b829f94c move GetPointerBaseWithConstantOffset out of GVN into ValueTracking.h 
llvm-svn: 120476
 2010-11-30 22:25:26 +00:00
Chris Lattner
9471d70496 remove a fixed fixme 
llvm-svn: 120474
 2010-11-30 22:18:11 +00:00
Chris Lattner
5f5c9a75cb Make DeleteDeadInstruction be a static function, move some code around. 
llvm-svn: 120471
 2010-11-30 21:58:14 +00:00
Eric Christopher
3a1c712e47 Move X86InstrFPStack.td over to PseudoI as well. 
llvm-svn: 120470
 2010-11-30 21:57:32 +00:00
Chris Lattner
e58643bcd7 switch RemoveAccessedObjects to use AliasAnalysis::Location to simplify 
the code.  We now get accurate sizes on Loads, though it surely doesn't
matter in practice.

llvm-svn: 120469
 2010-11-30 21:47:58 +00:00
Chris Lattner
df852d098f two improvements to RemoveAccessedObjects: 
1. if the underlying pointer passed in can be resolved
   to any argument or alloca, then we don't need to scan.
   Previously we would only avoid the scan if the alloca
   or byval was actually considered dead.
2. The dead store processing code is itself completely
   dead and didn't handle volatile stores right anyway,
   so delete it.  This allows simplifying the interface
   to RemoveAccessedObjects.

llvm-svn: 120467
 2010-11-30 21:38:30 +00:00
Eric Christopher
b15c993a73 Migrate X86InstrControl.td to use PseudoI and fix a couple of 80-col violations 
while I'm in there.

llvm-svn: 120466
 2010-11-30 21:37:36 +00:00
Chris Lattner
c117c05b6e remove the "undead" terminology, which is nonstandard and never 
made sense to me.  We now have a set of dead stack objects, and
they become live when loaded.  Fix a theoretical problem where
we'd pass in the wrong pointer to the alias query.

llvm-svn: 120465
 2010-11-30 21:32:12 +00:00
Chris Lattner
a4503a324b move call handling in handleEndBlock up a bit, and simplify it. 
If the call might read all the allocas, stop scanning early.
Convert a vector to smallvector, shrink SmallPtrSet to 16 instead
of 64 to avoid crazy linear scans.

llvm-svn: 120463
 2010-11-30 21:18:46 +00:00
Dale Johannesen
1ab2213b84 Avoid exponential growth of a table. It feels like 
there should be a better way to do this.  PR 8679.

llvm-svn: 120457
 2010-11-30 20:23:21 +00:00
Owen Anderson
20a6f2bd2e Provide Thumb2 encodings for a few miscellaneous instructions. 
llvm-svn: 120455
 2010-11-30 20:00:01 +00:00
Chris Lattner
ac17f2b483 various cleanups and code simplification 
llvm-svn: 120454
 2010-11-30 19:48:15 +00:00
Chris Lattner
3512297c58 make getPointerSize a static function. Add ivars to DSE for 
AA and MD pass info instead of using getAnalysis<> all over.

llvm-svn: 120453
 2010-11-30 19:34:42 +00:00
Chris Lattner
7ae2f179c6 reduce indentation, clean up TD use a bit. 
llvm-svn: 120452
 2010-11-30 19:28:23 +00:00
Jim Grosbach
532d63789b Add FIXME 
llvm-svn: 120451
 2010-11-30 19:25:56 +00:00
Owen Anderson
5f7b3e919b Add encoding support for Thumb2 PLD and PLI instructions. 
llvm-svn: 120449
 2010-11-30 19:19:31 +00:00
Eric Christopher
95f0d1fe65 Noticed this on inspection, fix and update some comments. 
llvm-svn: 120447
 2010-11-30 19:14:07 +00:00
Chris Lattner
41b6b286a3 enhance isRemovable to refuse to delete volatile mem transfers 
now that DSE hacks on them.  This fixes a regression I introduced,
by generalizing DSE to hack on transfers.

llvm-svn: 120445
 2010-11-30 19:12:10 +00:00
Jim Grosbach
aa96c057be Pseudo-ize ARM MOVPCRX 
llvm-svn: 120442
 2010-11-30 18:56:36 +00:00
Owen Anderson
6581027075 Provide encodings for a few more load/store variants. 
llvm-svn: 120439
 2010-11-30 18:38:28 +00:00
Jim Grosbach
cb8193b99e Pseudo-ize BX_CALL and friends. Remove dead instruction format classes. 
rdar://8685712

llvm-svn: 120438
 2010-11-30 18:30:19 +00:00
Chris Lattner
f541629573 add TLI support indicating that jumps are more expensive than logical operations 
and use this to disable a specific optimization.  Patch by Micah Villmow!

llvm-svn: 120435
 2010-11-30 18:12:52 +00:00
Che-Liang Chiou
f594fe5fc5 ptx: add command-line options for gpu target and ptx version 
llvm-svn: 120423
 2010-11-30 10:14:14 +00:00
Eric Christopher
1a99e7ebdb Fix some grammar in comments I noticed. 
llvm-svn: 120416
 2010-11-30 09:11:54 +00:00
Eric Christopher
d8e045d29e This defaults to GenericDomain. 
llvm-svn: 120415
 2010-11-30 09:11:07 +00:00
Jay Foad
c663d7e4f6 PR5207: Make APInt::set(), APInt::clear() and APInt::flip() return void. 
llvm-svn: 120413
 2010-11-30 09:02:01 +00:00
Eric Christopher
6a21ceab5c Implement a PseudoI class and transfer the sse instructions over to use 
it.

llvm-svn: 120412
 2010-11-30 08:57:23 +00:00
Eric Christopher
73365ae8b6 Fix insertion point in pcmp expander. 
While I'm there, clean up too many \n even for me.

llvm-svn: 120411
 2010-11-30 08:20:21 +00:00
Eric Christopher
2170738538 Fix some cleanups from my last patch. 
llvm-svn: 120410
 2010-11-30 08:10:28 +00:00
Bill Wendling
ae920bcc50 Add parsing for the Thumb t_addrmode_s4 addressing mode. This can almost 
certainly be made more generic. But it does allow us to parse something like:

          ldr     r3, [r2, r4]

correctly in Thumb mode.

llvm-svn: 120408
 2010-11-30 07:44:32 +00:00
Che-Liang Chiou
df20cec4fb ptx: add ld instruction 
support register and register-immediate addressing mode

todo: immediate and register-register addressing mode
llvm-svn: 120407
 2010-11-30 07:34:44 +00:00
Chris Lattner
7d444d0682 Rewrite the main DSE loop to be written in terms of reasoning 
about pairs of AA::Location's instead of looking for MemDep's
"Def" predicate.  This is more powerful and general, handling
memset/memcpy/store all uniformly, and implementing PR8701 and
probably obsoleting parts of memcpyoptimizer.

This also fixes an obscure bug with init.trampoline and i8
stores, but I'm not surprised it hasn't been hit yet.  Enhancing
init.trampoline to carry the size that it stores would allow
DSE to be much more aggressive about optimizing them.

llvm-svn: 120406
 2010-11-30 07:23:21 +00:00
Eric Christopher
f27f0b5234 Rewrite mwait and monitor support and custom lower arguments. 
Fixes PR8573.

llvm-svn: 120404
 2010-11-30 07:20:12 +00:00
Anders Carlsson
67e9e6234c Add a puts optimization that converts puts() to putchar('\n'). 
llvm-svn: 120398
 2010-11-30 06:19:18 +00:00
Chris Lattner
bf17250f9b rename a function and reduce some indentation, no functionality change. 
llvm-svn: 120391
 2010-11-30 05:30:45 +00:00
Jakob Stoklund Olesen
59dfcec5f9 Stub out a new LiveDebugVariables pass. 
This analysis is going to run immediately after LiveIntervals. It will stay
alive during register allocation and keep track of user variables mentioned in
DBG_VALUE instructions.

When the register allocator is moving values between registers and the stack, it
is very hard to keep track of DBG_VALUE instructions. We usually get it wrong.
This analysis maintains a data structure that makes it easy to update DBG_VALUE
instructions.

llvm-svn: 120385
 2010-11-30 02:17:10 +00:00