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46821 Commits

Author SHA1 Message Date
Rafael Espindola fc8223670a Add r130623 back now that ELF has been fixed to work with -fno-dwarf2-cfi-asm. 
llvm-svn: 130658
 2011-05-01 15:44:13 +00:00
NAKAMURA Takumi 4471f82e91 Windows/DynamicLibrary.inc: Clean up ELM_Callback. We may check the decl instead of the versions of individual libraries. 
autoconf: Add checking ELM_Callback decl for mingw32 and mingw-w64.
cmake/config-ix.cmake: Add checking ELM_Callback decl for win32.

llvm-svn: 130657
 2011-05-01 13:29:49 +00:00
Chandler Carruth ddc91b25e3 Remove an unused variable from this function introduced in r130637, 
likely a result of copy/paste.

llvm-svn: 130640
 2011-05-01 06:14:10 +00:00
Rafael Espindola 750cb61553 GCC uses a different encoding of pointers in the FDE when using 
-fno-dwarf2-cfi-asm. Implement the same behavior.

llvm-svn: 130637
 2011-05-01 04:49:54 +00:00
Rafael Espindola 95215a76cd I forgot these files in the previous commit. 
llvm-svn: 130635
 2011-05-01 04:19:24 +00:00
Rafael Espindola fd05785324 Simplify the handling of pcrel relocations on ELF. Now we do the right thing 
for all symbol differences and can drop the old EmitPCRelSymbolValue
method.

This also make getExprForFDESymbol on ELF equal to the one on MachO, and it
can be made non-virtual.

llvm-svn: 130634
 2011-05-01 03:50:49 +00:00
Rafael Espindola b7c2286055 Revert the previous patch while I figure out how to make llvm-gcc 
less agressive about disabling cfi on linux :-(

llvm-svn: 130626
 2011-04-30 23:03:44 +00:00
Jakob Stoklund Olesen 2348cdd67f X86AsmPrinter doesn't know how to handle the X86II::MO_GOT_ABSOLUTE_ADDRESS flag 
after folding ADD32ri to ADD32mi, so don't do that.

This only happens when the greedy register allocator gets itself in trouble and
spills %vreg9 here:

16L             %vreg9<def> = MOVPC32r 0, %ESP<imp-use>; GR32:%vreg9
48L             %vreg9<def> = ADD32ri %vreg9, <es:_GLOBAL_OFFSET_TABLE_>[TF=1], %EFLAGS<imp-def,dead>; GR32:%vreg9

That should never happen, the live range should be split instead.

llvm-svn: 130625
 2011-04-30 23:00:05 +00:00
Rafael Espindola 5265bc483e Enable CFI on OS X. 
Currently the output should be almost identical to the one produced by CodeGen
to make the transition easier.

The only two differences I know of are:

* Some files get an extra advance loc of size 0. This will be fixed when
relaxations are enabled.
* The optimization of declaring an EH symbol as an external variable is not
implemented. This is a subset of adding the nounwind attribute, so we if really
this at -O0 we should probably do it at the IL level.

llvm-svn: 130623
 2011-04-30 22:29:54 +00:00
Jakob Stoklund Olesen 38a0b94dce When a physreg is live-in and live through a basic block, make sure its live 
range covers the entire block.

The live range can't be terminated at a random instruction.

llvm-svn: 130619
 2011-04-30 19:12:33 +00:00
Benjamin Kramer 9aa91b1f4e InstCombine: Turn (zext A) udiv (zext B) into (zext (A udiv B)). Same for urem or constant B. 
This obviously helps a lot if the division would be turned into a libcall
(think i64 udiv on i386), but div is also one of the few remaining instructions
on modern CPUs that become more expensive when the bitwidth gets bigger.

This also helps register pressure on i386 when dividing chars, divb needs
two 8-bit parts of a 16 bit register as input where divl uses two registers.

int foo(unsigned char a) { return a/10; }
int bar(unsigned char a, unsigned char b) { return a/b; }

compiles into (x86_64)
_foo:
  imull $205, %edi, %eax
  shrl  $11, %eax
  ret
_bar:
  movzbl        %dil, %eax
  divb  %sil, %al
  movzbl        %al, %eax
  ret

llvm-svn: 130615
 2011-04-30 18:16:07 +00:00
Benjamin Kramer 57b3df59b9 Use SimplifyDemandedBits on div instructions. 
This folds away silly stuff like (a&255)/1000 -> 0.

llvm-svn: 130614
 2011-04-30 18:16:00 +00:00
Rafael Espindola bde52bca69 Implement MCAsmStreamer::EmitEHSymAttributes. Doing this in the asm streamer 
is a bit ugly, but doing it on the base MCStreamer would be redundant
with the object streamer which does it using SD.

llvm-svn: 130611
 2011-04-30 16:34:57 +00:00
Rafael Espindola 0b474c2d15 Handle PrivateExtern eh symbols. 
llvm-svn: 130609
 2011-04-30 16:22:46 +00:00
Jakob Stoklund Olesen ec9b4a6b8b Avoid using stale entries form the sibling value map. 
This could happen when trying to use a value that had been eliminated after dead
code elimination and folding loads.

llvm-svn: 130597
 2011-04-30 06:42:21 +00:00
Jakob Stoklund Olesen 357dd36136 Use hysteresis for local live range splitting as well. 
llvm-svn: 130596
 2011-04-30 05:07:46 +00:00
Rafael Espindola a3181d12c6 Add all the plumbing needed for MC to expand cfi to the old tables in 
the final assembly. It is the same technique used when targeting
assemblers that don't support .loc.

llvm-svn: 130587
 2011-04-30 03:44:37 +00:00
Rafael Espindola 1d1eced025 Implement MCAsmStreamer::EmitDwarfAdvanceFrameAddr. 
llvm-svn: 130585
 2011-04-30 03:21:04 +00:00
Jakob Stoklund Olesen d50e5eb8c3 Update comment. 
llvm-svn: 130582
 2011-04-30 03:13:08 +00:00
Jakob Stoklund Olesen 6e399a6ecb Use a greedy algorithm for allocating registers. 
llvm-svn: 130568
 2011-04-30 01:37:54 +00:00
Bill Wendling 9f638ab181 Print out the 'nontemporal' info on a store. 
llvm-svn: 130562
 2011-04-29 23:45:22 +00:00
Eli Friedman 4105ed1523 Make FastEmit_ri_ try a bit harder to succeed for supported operations; FastEmit_i can fail for non-Thumb2 ARM. Makes ARMSimplifyAddress work correctly, and reduces the number of fast-isel bailouts on non-Thumb ARM. 
llvm-svn: 130560
 2011-04-29 23:34:52 +00:00
Eric Christopher e02e07c3a6 80-col. 
llvm-svn: 130558
 2011-04-29 23:12:01 +00:00
Eli Friedman 468dfabce0 Zap a couple now-unused functions. 
llvm-svn: 130557
 2011-04-29 22:56:48 +00:00
Eli Friedman 328bad02fa Switch to ImmLeaf (which can be used by FastISel) for a few more common ARM/Thumb2 patterns. 
llvm-svn: 130552
 2011-04-29 22:48:03 +00:00
Devang Patel a8e7411c74 Assing line number info to new PHIs created by SSA updater. 
llvm-svn: 130551
 2011-04-29 22:28:59 +00:00
Eric Christopher 7708746c33 Add FastEmitInst_ii for the arm fast isel generator. It doesn't use it, but 
if it ever did it needs the def machinery.

llvm-svn: 130549
 2011-04-29 22:07:50 +00:00
Eric Christopher 26b8ac4b8c Some cleanup and optimize fallthrough more. 
llvm-svn: 130546
 2011-04-29 21:56:31 +00:00
Rafael Espindola 6a85f9b42e Avoid some uses of .uleb128. This is a small speedup and more importantly 
lets this code be used when producing assembly code for old assemblers without
uleb support.

llvm-svn: 130544
 2011-04-29 21:50:57 +00:00
Rafael Espindola 6c961e1b75 Implement MCAsmStreamer::EmitCFIDefCfa. 
llvm-svn: 130543
 2011-04-29 21:41:06 +00:00
Devang Patel 84d7eb7252 Print new instructions without DebugLoc. 
llvm-svn: 130542
 2011-04-29 21:36:04 +00:00
Eli Friedman 86caced370 Re-committing r130454, which does not in fact break anything. 
Fix a rather obscure crash caused by ARM fast-isel generating code which redefines a register.
rdar://problem/9338332 .

llvm-svn: 130539
 2011-04-29 21:22:56 +00:00
Devang Patel c1f7c1d469 Preserve line number information. 
llvm-svn: 130536
 2011-04-29 20:38:55 +00:00
Eric Christopher 8d46b47787 Add trunc->branch support, this won't help with clang's i8->i1 truncations 
for bools, but is a start.

llvm-svn: 130534
 2011-04-29 20:02:39 +00:00
Peter Collingbourne 616044acd5 SimplifyCFG: Expose phi node folding cost threshold as command line parameter 
llvm-svn: 130528
 2011-04-29 18:47:38 +00:00
Peter Collingbourne e3511e15e0 SimplifyCFG: Add CostRemaining parameter to DominatesMergePoint 
llvm-svn: 130527
 2011-04-29 18:47:31 +00:00
Peter Collingbourne 61f6602acd SimplifyCFG: Add Trunc, ZExt and SExt to the list of cheap instructions for phi node folding 
llvm-svn: 130526
 2011-04-29 18:47:25 +00:00
Daniel Dunbar 72032861c6 MCAsmLayout: Add support for computing the symbol offset of variables. Not 
currently used, because variables don't get reported as being "defined".

llvm-svn: 130524
 2011-04-29 18:20:20 +00:00
Daniel Dunbar bea7b93c88 MC: Change variable symbols to be recognized as defined, by assigning their sections based on FindAssociatedSection(). 
llvm-svn: 130523
 2011-04-29 18:20:17 +00:00
Daniel Dunbar b200f93125 MC/Mach-O: Update getSymbolAddress() to support evaluation of variables. 
llvm-svn: 130522
 2011-04-29 18:13:42 +00:00
Daniel Dunbar 29ba55cfe4 MC/Mach-O: Allow emission of relocations for variables in some more cases. 
llvm-svn: 130520
 2011-04-29 18:10:47 +00:00
Daniel Dunbar b9c2b6c50d MC/Mach-O: Find section ordinal's by looking at the symbol, instead of assuming they are present in a fragment. 
llvm-svn: 130519
 2011-04-29 18:07:43 +00:00
Devang Patel 124ae13421 Hoist MCLineEntry construction AsmPrinter so that anyone who derives from AsmPrinter can have line number entries. 
PR 9810

llvm-svn: 130518
 2011-04-29 18:00:54 +00:00
Daniel Dunbar dc3e4cc5ed MCExpr: Add FindAssociatedSection, which attempts to mirror the 'as' semantics 
that associate sections with expressions.

llvm-svn: 130517
 2011-04-29 18:00:03 +00:00
Daniel Dunbar 1bf128eaeb MC/AsmParser: Generalize a check. 
llvm-svn: 130515
 2011-04-29 17:53:11 +00:00
Douglas Gregor dd8061e09f Fix a C++0x portability issue with std::make_pair. Explicitly providing template arguments no longer works when the call arguments are lvalues. 
llvm-svn: 130513
 2011-04-29 16:57:12 +00:00
Douglas Gregor 0e50682f26 Include <pthread.h> before we use pthread_self/pthread_kill 
llvm-svn: 130510
 2011-04-29 16:12:17 +00:00
Rafael Espindola 1fc5bf9fc5 The last hack for producing bit identical output with cfi on OS X. 
llvm-svn: 130504
 2011-04-29 15:09:53 +00:00
Rafael Espindola 697edc89a5 Change DwarfCFIException's member variables to track what it actually 
emmits: .cfi_personality, .cfi_lsda and the moves.

llvm-svn: 130503
 2011-04-29 14:48:51 +00:00
Andrew Trick e794e17524 Teach Thumb2 isel to fold and->rotr ==> ROR. 
Generalization of Nate Begeman's patch!

llvm-svn: 130502
 2011-04-29 14:18:15 +00:00