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Author SHA1 Message Date
Nadav Rotem
afca83738d Add the "ForceSizeOpt" attribute. 
Patch by Quentin Colombet <qcolombet@apple.com>

Original description:
"""
The attached patch is the first step to have a better control on Oz related optimizations.
The Oz optimization level focuses on code size, thus I propose to add an attribute called ForceSizeOpt.
"""

llvm-svn: 166422
 2012-10-22 17:33:31 +00:00
Nadav Rotem
ea70508da6 Rename a variable. 
llvm-svn: 166410
 2012-10-22 04:53:05 +00:00
Nadav Rotem
6b56385c1a Vectorizer: optimize the generation of selects. If the condition is uniform, generate a scalar-cond select (i1 as selector). 
llvm-svn: 166409
 2012-10-22 04:38:00 +00:00
Nadav Rotem
708e5d2fb0 Update the loop vectorizer docs. 
llvm-svn: 166408
 2012-10-22 03:52:53 +00:00
Nick Lewycky
44e5136371 Reapply r166405, teaching tailcallelim to be smarter about nocapture, with a 
very small but very important bugfix:
  bool shouldExplore(Use *U) {
    Value *V = U->get();
    if (isa<CallInst>(V) || isa<InvokeInst>(V))
    [...]
should have read:
  bool shouldExplore(Use *U) {
    Value *V = U->getUser();
    if (isa<CallInst>(V) || isa<InvokeInst>(V))
Fixes PR14143!

llvm-svn: 166407
 2012-10-22 03:03:52 +00:00
NAKAMURA Takumi
32507dd070 Revert r166405, "Teach TailRecursionElimination to consider 'nocapture' when deciding whether" 
It broke selfhosting stage2 in several builders.

llvm-svn: 166406
 2012-10-22 00:48:51 +00:00
Nick Lewycky
1a50a0e414 Teach TailRecursionElimination to consider 'nocapture' when deciding whether 
calls can be marked tail.

llvm-svn: 166405
 2012-10-21 23:51:22 +00:00
Hal Finkel
502fe3cc4a DataLayout should use itself when calculating the size of a vector. 
This is important for vectors of pointers because only DataLayout,
not the underlying vector type, knows how to calculate the size
of the pointers in the vector. Fixes PR14138.

llvm-svn: 166401
 2012-10-21 20:38:03 +00:00
Benjamin Kramer
d97f445bdf Revert r166390 "LoopIdiom: Replace custom dependence analysis with LoopDependenceAnalysis." 
It passes all tests, produces better results than the old code but uses the
wrong pass, LoopDependenceAnalysis, which is old and unmaintained. "Why is it
still in tree?", you might ask. The answer is obviously: "To confuse developers."

Just swapping in the new dependency pass sends the pass manager into an infinte
loop, I'll try to figure out why tomorrow.

llvm-svn: 166399
 2012-10-21 19:31:16 +00:00
Jakob Stoklund Olesen
600ff2e59e Don't crash when the Assignments vector is empty. 
Reported by Vincent Lejeune using an out-of-tree target.

llvm-svn: 166398
 2012-10-21 19:05:03 +00:00
Anders Carlsson
d04e66ae01 Avoid an extra hash lookup when inserting a value into the widen map. 
llvm-svn: 166395
 2012-10-21 16:26:35 +00:00
Jakub Staszak
a477da32fc Simplify code. No functionality change. 
llvm-svn: 166393
 2012-10-21 15:36:03 +00:00
Jakub Staszak
ed5ec60053 Simplify code. No functionality change. 
llvm-svn: 166392
 2012-10-21 15:29:19 +00:00
Benjamin Kramer
7d87bba7c4 LoopIdiom: Replace custom dependence analysis with LoopDependenceAnalysis. 
Requires a lot less code and complexity on loop-idiom's side and the more
precise analysis can catch more cases, like the one I included as a test case.
This also fixes the edge-case miscompilation from PR9481. I'm not entirely
sure that all cases are handled that the old checks handled but LDA will
certainly become smarter in the future.

llvm-svn: 166390
 2012-10-21 15:03:07 +00:00
Nadav Rotem
380fe201de Fix a bug in the vectorization of wide load/store operations. 
We used a SCEV to detect that A[X] is consecutive. We assumed that X was
the induction variable. But X can be any expression that uses the induction
for example: X = i + 2;

llvm-svn: 166388
 2012-10-21 06:49:10 +00:00
Nadav Rotem
825cda19d5 Add support for reduction variables that do not start at zero. 
This is important for nested-loop reductions such as :

In the innermost loop, the induction variable does not start with zero:

for (i = 0 .. n)
 for (j = 0 .. m)
  sum += ...

llvm-svn: 166387
 2012-10-21 05:52:51 +00:00
Nadav Rotem
5ab04af30a Document change. Describe the pass and some papers that inspired the design of the pass. 
llvm-svn: 166386
 2012-10-21 04:04:25 +00:00
Nadav Rotem
763abacb83 Vectorizer: fix a bug in the classification of induction/reduction phis. 
llvm-svn: 166384
 2012-10-21 02:38:01 +00:00
Lang Hames
784ac6493a Allow the commuted form of tied-operand constraints in tablegen ("$dst = $src", 
rather than "$src = $dst").

llvm-svn: 166382
 2012-10-20 22:44:13 +00:00
Nadav Rotem
2ee8edf34a Fix an infinite loop in the loop-vectorizer. 
PR14134.

llvm-svn: 166379
 2012-10-20 20:45:01 +00:00
Dmitri Gribenko
f01cbf1125 Document current Doxygen use practices in Coding Standards. Mostly it is 
obvious stuff and most new code being committed conforms to that.  Some old
code does not; this might cause confusion and this is the motivation to
document the correct guidelines.

llvm-svn: 166378
 2012-10-20 13:27:43 +00:00
Benjamin Kramer
7808f22a33 Symbol hygiene: Make sure declarations and definitions match, make helper functions static. 
llvm-svn: 166376
 2012-10-20 12:53:26 +00:00
Benjamin Kramer
7e11b31d39 SROA: Simplify code. No functionality change. 
llvm-svn: 166375
 2012-10-20 12:04:57 +00:00
Benjamin Kramer
f3ac3fa22b InstCombine: Fix an edge case where constant icmps could sneak into ConstantFoldInstOperands and crash. 
Have to refactor the ConstantFolder interface one day to define bugs like this away. Fixes PR14131.

llvm-svn: 166374
 2012-10-20 08:43:52 +00:00
Nadav Rotem
cdd573e703 Vectorize: teach cavVectorizeMemory to distinguish between A[i]+=x and A[B[i]]+=x. 
If the pointer is consecutive then it is safe to read and write. If the pointer is non-loop-consecutive then
it is unsafe to vectorize it because we may hit an ordering issue.

llvm-svn: 166371
 2012-10-20 08:26:33 +00:00
Nadav Rotem
762317ecc6 Fix a typo 
llvm-svn: 166367
 2012-10-20 05:03:27 +00:00
Nadav Rotem
4e013454ca Vectorizer: refactor the memory checks to a new function. No functionality change. 
llvm-svn: 166366
 2012-10-20 04:59:06 +00:00
Nadav Rotem
33b2c76073 Vectorization docs. 
llvm-svn: 166364
 2012-10-20 02:34:34 +00:00
Chad Rosier
f81bc67275 [ms-inline asm] Rename AsmOpRewrite to just AsmRewrite to be more generic. No functional change intended. 
llvm-svn: 166360
 2012-10-20 01:02:45 +00:00
Chad Rosier
be98459bfd [ms-inline asm] If the state of the parser is ignore, then don't parse the 
inline assembly.  Also make sure the remove the ignored statements from the IR.

llvm-svn: 166357
 2012-10-20 00:47:08 +00:00
Nadav Rotem
61a5b018ad LoopVectorize: Keep the IRBuilder on the stack. 
llvm-svn: 166354
 2012-10-19 23:27:19 +00:00
Chad Rosier
03179afe79 [ms-inline asm] Continue parsing even when we're in an ignore block. 
llvm-svn: 166352
 2012-10-19 23:15:00 +00:00
Nadav Rotem
8fe03aa4c1 Vectorizer: Add support for loop reductions. 
For example:

  for (i=0; i<n; i++)
   sum += A[i] +  B[i] + i;

llvm-svn: 166351
 2012-10-19 23:05:40 +00:00
Shuxin Yang
d8a190a17c 1. Remove noreturn attribute from __builtin_debugtrap(). 
(The change at Clang side was committed in r166345)

2. Cosmetic change in order to conform to coding standards. 

llvm-svn: 166350
 2012-10-19 23:00:20 +00:00
Chad Rosier
3d1b58e0f9 [ms-inline asm] Reset the opcode prior to parsing a statement. 
llvm-svn: 166349
 2012-10-19 22:57:33 +00:00
Akira Hatanaka
5439c43726 [mips] Use 64-bit registers to return an sret pointer if target ABI is N64. 
llvm-svn: 166344
 2012-10-19 22:11:40 +00:00
Eric Christopher
42faa398e7 Grammar-o. 
llvm-svn: 166343
 2012-10-19 22:10:54 +00:00
Akira Hatanaka
32235d5612 [mips] Add code to do tail call optimization. 
Currently, it is enabled only if option "enable-mips-tail-calls" is given and
all of the callee's arguments are passed in registers.

llvm-svn: 166342
 2012-10-19 21:47:33 +00:00
Akira Hatanaka
18ec43c9c2 [mips] Fix TAILCALL's operand node type. 
llvm-svn: 166341
 2012-10-19 21:30:15 +00:00
Nadav Rotem
13a468b929 revert r166264 because the LTO build is still failing 
llvm-svn: 166340
 2012-10-19 21:28:43 +00:00
Akira Hatanaka
d728ae0014 [mips] Delete MipsFunctionInfo::MaxCallFrameSize which is no longer used. 
llvm-svn: 166339
 2012-10-19 21:18:38 +00:00
Akira Hatanaka
54f6697369 [mips] Add tail call instructions. 
llvm-svn: 166338
 2012-10-19 21:14:34 +00:00
Akira Hatanaka
8198825482 [mips] Make the branch nodes used in jump instructions a template parameter. 
llvm-svn: 166337
 2012-10-19 21:11:03 +00:00
Akira Hatanaka
cfc486ced3 Add node and enum for mips tail call. 
llvm-svn: 166318
 2012-10-19 20:59:39 +00:00
Chad Rosier
b2e9c0e226 [ms-inline asm] Have the TargetParser callback to Sema to determine the size of 
a memory operand.  Retain this information and then add the sizing directives
to the IR.  This allows the backend to do proper instruction selection.

llvm-svn: 166316
 2012-10-19 20:57:14 +00:00
Michael Liao
432bf8dcf1 Add 'IntrNoReturn' for longjmp intrinsics 
llvm-svn: 166314
 2012-10-19 20:43:54 +00:00
Benjamin Kramer
0edfdde403 SimplifyLibcalls: The return value of ffsll is always i32, even when the input is zero. 
Fixes PR13028.

llvm-svn: 166313
 2012-10-19 20:43:44 +00:00
Micah Villmow
4dcbb3e605 Fix a build error for ocaml bindings that was introduced with the TargetData --> DataLayout changes. 
llvm-svn: 166309
 2012-10-19 20:36:22 +00:00
Chad Rosier
9de7b4647d [ms-inline asm] Add a MCAsmParserSemaCallback to the TargetAsmParser. 
llvm-svn: 166308
 2012-10-19 20:35:42 +00:00
Daniel Dunbar
7abcd13b24 lit: Rename the valgrind leaks feature to match what is currently used 
(vg_leak).

llvm-svn: 166306
 2012-10-19 20:29:30 +00:00