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Author SHA1 Message Date
Bill Wendling e2b889be65 Fix comment. 
llvm-svn: 131173
 2011-05-11 01:08:39 +00:00
Evan Cheng 05fc35e275 Add a late optimization to BranchFolding that hoist common instruction sequences 
at the start of basic blocks to their common predecessor. It's actually quite
common (e.g. about 50 times in JM/lencod) and has shown to be a nice code size
benefit. e.g.

        pushq   %rax
        testl   %edi, %edi
        jne     LBB0_2
## BB#1:
        xorb    %al, %al
        popq    %rdx
        ret
LBB0_2:
        xorb    %al, %al
        callq   _foo
        popq    %rdx
        ret

=>

        pushq   %rax
        xorb    %al, %al
        testl   %edi, %edi
        je      LBB0_2
## BB#1:
        callq   _foo
LBB0_2:
        popq    %rdx
        ret

rdar://9145558

llvm-svn: 131172
 2011-05-11 01:03:01 +00:00
Eric Christopher 4a34e61e53 Optimize atomic lock or that doesn't use the result value. 
Next up: xor and and.

Part of rdar://8470697

llvm-svn: 131171
 2011-05-10 23:57:45 +00:00
Rafael Espindola 14e1b58405 Add triple. 
llvm-svn: 131169
 2011-05-10 23:14:29 +00:00
Rafael Espindola dc9d9f8eeb Fix cmake again. 
llvm-svn: 131164
 2011-05-10 22:42:41 +00:00
Nick Lewycky 1ec5c8a8bc Remove empty file. 
llvm-svn: 131162
 2011-05-10 22:38:17 +00:00
Rafael Espindola de32fa163f Avoid a gcc warning. 
llvm-svn: 131161
 2011-05-10 22:28:35 +00:00
Rafael Espindola b361d2b2bc Fix cmake build. 
llvm-svn: 131160
 2011-05-10 22:19:33 +00:00
Nick Lewycky e09457b02b Revert r131155 for now. It makes VMCore depend on Analysis and Transforms 
headers.

llvm-svn: 131159
 2011-05-10 22:16:06 +00:00
Rafael Espindola a678098f24 Initialize moveTypeModule. 
llvm-svn: 131157
 2011-05-10 21:54:59 +00:00
Eli Friedman 768de0a0f8 Disable my little CopyToReg argument hack with fast-isel. rdar://problem/9413587 . 
llvm-svn: 131156
 2011-05-10 21:50:58 +00:00
David Chisnall c2fcb4df5e Add support for plugins add passes to the default set of passes. The standard set of passes used by front ends can now be modified by LLVM plugins, without needing to modify any front ends. 
Still to do:

- Allow replacing / removing passes (infrastructure there, just needs an infrastructure exposed)
- Defining sets of passes to be added or removed as a group
- Extending the support to allow user-defined groups of optimisations
- Allow plugins to be specified for loading automatically (e.g. from plugins.conf or some similar mechanism)

Reviewed by Nick Lewycky.

llvm-svn: 131155
 2011-05-10 21:36:48 +00:00
Stuart Hastings 999fa3bf1f Correctly walk through nested and adjacent CALLSEQ_START nodes. No 
test case; I've only seen this on a release branch, and I can't get it
to reproduce on trunk.  rdar://problem/7662569

llvm-svn: 131152
 2011-05-10 21:20:03 +00:00
Rafael Espindola 19c1a56287 Produce a __debug_frame section on darwin ARM when appropriate. 
llvm-svn: 131151
 2011-05-10 21:04:45 +00:00
Rafael Espindola 99f6735532 On MachO, unlike ELF, there should be no relocation to produce the CIE pointer. 
llvm-svn: 131149
 2011-05-10 20:59:42 +00:00
Rafael Espindola 2fe0ee1ce2 Rename DwarfRequiresRelocationForStmtList to 
DwarfRequiresRelocationForSectionOffset as this is not specific to StmtList.

llvm-svn: 131148
 2011-05-10 20:35:05 +00:00
Rafael Espindola d0d2354258 The EH symbols are only needed in eh_frame, not debug_frame. 
llvm-svn: 131146
 2011-05-10 19:51:53 +00:00
Rafael Espindola fdc3e6fab6 Use .cfi_sections to put the unwind info in .debug_frame when possible. With 
this clang will use .debug_frame in, for example,
clang -g -c -m32 test.c
This matches gcc's behaviour. It looks like .debug_frame is a bit bigger
than .eh_frame, but has the big advantage of not being allocated.

llvm-svn: 131140
 2011-05-10 18:39:09 +00:00
Eric Christopher e33464663f Refactor lock versions of binary operators to be a little less 
cut and paste.

llvm-svn: 131139
 2011-05-10 18:36:16 +00:00
Jason W Kim 62f1ab79ec First cut at getting debugging support for ARM/MC/ELF/.o 
DWARF stuff also gets fixed up by ELFARMAsmBackend::ApplyFixup(),
but the offset is not guaranteed to be mod 4 == 0 as in text/data. 

llvm-svn: 131137
 2011-05-10 18:07:25 +00:00
Jakob Stoklund Olesen 4028ccdbe3 Downgrade a tablegen warning to an error. 
Ambiguous sub-register index compositions are OK as long as the backend writer
knows what he is doing.

llvm-svn: 131134
 2011-05-10 17:52:59 +00:00
Jakob Stoklund Olesen 50215afd8a Fix PR9883. Make sure all caches are invalidated when a live range is repaired. 
The previous invalidation missed the alias interference caches.

Also add a stats counter for the number of repaired ranges.

llvm-svn: 131133
 2011-05-10 17:37:41 +00:00
Rafael Espindola 27390b4a0e In a debug_frame the cfi offset is to the start of the debug_frame section! 
llvm-svn: 131129
 2011-05-10 15:20:23 +00:00
Justin Holewinski 3c0447259c PTX: add test cases for cvt, fneg, and selp 
Patch by Dan Bailey

llvm-svn: 131128
 2011-05-10 14:53:13 +00:00
Rafael Espindola ec53aa9485 Add CFIStartSections to the asm printer. Add an assert that at least 
one of the sections is created.

llvm-svn: 131124
 2011-05-10 13:39:48 +00:00
Justin Holewinski 72d74e4606 PTX: add PTX 2.3 setting in PTX sub-target. 
Patch by Wei-Ren Chen

llvm-svn: 131123
 2011-05-10 12:32:11 +00:00
Rafael Espindola 1ecb12fc57 Add support for producing .deubg_frame sections. 
llvm-svn: 131121
 2011-05-10 03:54:12 +00:00
Rafael Espindola b6444c0401 Small cleanups. 
llvm-svn: 131120
 2011-05-10 03:26:21 +00:00
Rafael Espindola b6089d6cac Factor some code into a new EmitFrames method. 
llvm-svn: 131119
 2011-05-10 03:14:15 +00:00
Rafael Espindola 0e130d1d37 Remove unused argument. 
llvm-svn: 131118
 2011-05-10 03:01:39 +00:00
Rafael Espindola 74b101f3e3 Parsing and plumbing for .cfi_sections. 
llvm-svn: 131117
 2011-05-10 01:10:18 +00:00
Devang Patel 3fd06f760b Preserve line number information. 
llvm-svn: 131112
 2011-05-10 00:03:11 +00:00
Devang Patel 589845d887 Do not ignore InlinedAt while walking up scope chain to find subprogram node. 
llvm-svn: 131106
 2011-05-09 22:14:49 +00:00
Jim Grosbach 112a2de78c Tidy up. 80-column and whitespace. 
llvm-svn: 131094
 2011-05-09 20:05:25 +00:00
Eric Christopher 4480428474 Look through struct wrapped types for inline asm statments. 
Patch by Evan Cheng.

llvm-svn: 131093
 2011-05-09 20:04:43 +00:00
Dan Gohman 0daf687e1d Change a few std::maps to DenseMaps. 
llvm-svn: 131088
 2011-05-09 18:44:09 +00:00
Eric Christopher 5dc19f916c Fix td file comments for Mips. 
Patch by Liu <proljc@gmail.com>!

llvm-svn: 131086
 2011-05-09 18:16:46 +00:00
Mon P Wang 92ff16b7bb Fixed MC encoding for index_align for VLD1/VST1 (single element from one lane) for size 32 
llvm-svn: 131085
 2011-05-09 17:47:27 +00:00
Duncan Sands 6be291a2cd Indent properly, no functionality change. 
llvm-svn: 131082
 2011-05-09 08:03:33 +00:00
NAKAMURA Takumi 392445823d Eliminate an unused line to fix a warning. 
llvm-svn: 131078
 2011-05-08 23:19:04 +00:00
Jakob Stoklund Olesen 89bd2ae517 Remove an assertion to fix PR9872. 
It can happen that a live debug variable is the last use of a sub-register, and
the register allocator will pick a larger register class for the virtual
register.  If the allocated register doesn't support the sub-register index,
just use %noreg for the debug variables instead of asserting.

In PR9872, a debug variable ends up in the sub_8bit_hi part of a GR32_ABCD
register. The register is split and one part is inflated to GR32 and assigned
%ESI because there are no more normal uses of sub_8bit_hi.

Since %ESI doesn't have that sub-register, substPhysReg asserted. Now it will
simply insert a %noreg instead, and the debug variable will be marked
unavailable in that range.

We don't currently have a way of saying: !"value" is in bits 8-15 of %ESI, I
don't know if DWARF even supports that.

llvm-svn: 131073
 2011-05-08 19:21:08 +00:00
Benjamin Kramer d724a590e5 X86: Add a bunch of peeps for add and sub of SETB. 
"b + ((a < b) ? 1 : 0)" compiles into
	cmpl	%esi, %edi
	adcl	$0, %esi
instead of
	cmpl	%esi, %edi
	sbbl	%eax, %eax
	andl	$1, %eax
	addl	%esi, %eax

This saves a register, a false dependency on %eax
(Intel's CPUs still don't ignore it) and it's shorter.

llvm-svn: 131070
 2011-05-08 18:36:07 +00:00
Rafael Espindola ab39c63538 Don't force relaxation of AdvanceLoc instructions on OS X. gdb is happy with 
the smaller encoding and this cuts 270336 bytes from a release version of
clang and 1246272 bytes from a debug build.

llvm-svn: 131067
 2011-05-08 14:35:21 +00:00
Eli Friedman aa2637343c PR9869: Add explicit destructor declarations to Operator subclasses, to allow 
compiling Operator.h with gcc 4.6 in C++0x mode.

llvm-svn: 131062
 2011-05-08 01:59:22 +00:00
Jakob Stoklund Olesen c132174169 Eliminate the ARM sub-register indexes that are not needed by the sources. 
Tablegen will invent its own names for these indexes, and the register file is a
bit simpler.

llvm-svn: 131059
 2011-05-07 21:22:42 +00:00
Jakob Stoklund Olesen c8c4ded3c6 Teach TableGen to automatically generate missing SubRegIndex instances. 
The RegisterInfo.td file should only specify the indexes that sources need to
refer to. The rest is inferred.

llvm-svn: 131058
 2011-05-07 21:22:39 +00:00
Eli Friedman 6dec2aa9b4 Fix comments per Duncan's review. 
llvm-svn: 131055
 2011-05-07 19:23:14 +00:00
Duncan Sands af32728a57 The comparision "max(x,y)==x" is equivalent to "x>=y". Since the max is 
often expressed as "x >= y ? x : y", there is a good chance we can extract
the existing "x >= y" from it and use that as a replacement for "max(x,y)==x".

llvm-svn: 131049
 2011-05-07 16:56:49 +00:00
Eric Christopher 1e3db02bda Fix the non-MC encoding of pkhbt and pkhtb. 
Patch by Stephen Hines.

llvm-svn: 131045
 2011-05-07 04:37:27 +00:00
Jakob Stoklund Olesen 58799a35e5 Revert ExecutionEngine patches, they either failed to build or broke unit tests. 
Please ensure the build is clean and tests are passing when recommitting.

llvm-svn: 131044
 2011-05-07 03:12:54 +00:00