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Author SHA1 Message Date
Cameron Zwarich
0fa638e27c Simplify some code in MachineVerifier that was doing the correct thing, but not 
in the most obvious way.

llvm-svn: 122610
 2010-12-28 23:45:38 +00:00
Rafael Espindola
d93ec3572d Don't produce a "DW_CFA_advance_loc 0". 
llvm-svn: 122609
 2010-12-28 23:38:03 +00:00
Cameron Zwarich
3eacb7fff8 Revert the optimization in r122596. It is correct for all current targets, but 
it relies on assumptions that may not be true in the future.

llvm-svn: 122608
 2010-12-28 23:02:56 +00:00
Venkatraman Govindaraju
3c6418f9fc Multiple SPARC backend fixes: added Y register; updated select_cc, subx, subxcc defs/uses; 
and fixed CustomInserter.

llvm-svn: 122607
 2010-12-28 20:39:17 +00:00
Tobias Grosser
4f458bffaa Integers are primitive types. Update the documentation to state this 
This was done for label, void, floating point, x86mmx, metadata,
just not integer.

llvm-svn: 122606
 2010-12-28 20:29:31 +00:00
Chris Lattner
51a906ce92 simplify this, isBytewiseValue handles the extra check. We still 
check for "multiple of a byte" in size to make it clear that the
>> 3 below is safe.

llvm-svn: 122604
 2010-12-28 18:53:48 +00:00
Chris Lattner
8e3ff12790 add a note from llvmdev 
llvm-svn: 122603
 2010-12-28 18:45:02 +00:00
Rafael Espindola
3fdd045643 Implement .cfi_remember_state and .cfi_restore_state. 
llvm-svn: 122602
 2010-12-28 18:36:23 +00:00
Duncan Sands
87515f1e57 Clarify that InstructionSimplify only returns values that dominate the 
original instruction.

llvm-svn: 122601
 2010-12-28 18:01:19 +00:00
Duncan Sands
707bdbd129 Small optimization to speed up replacementPreservesLCSSAForm. 
llvm-svn: 122600
 2010-12-28 18:00:24 +00:00
Benjamin Kramer
5acd47c674 Cast away "comparison between signed and unsigned integer" warnings. 
llvm-svn: 122598
 2010-12-28 13:52:52 +00:00
Benjamin Kramer
133004a64d Fix a signed/unsigned comparison warning. 
llvm-svn: 122597
 2010-12-28 13:05:13 +00:00
Cameron Zwarich
c9c7488542 Avoid iterating every operand of an instruction in StrongPHIElimination, since 
we are only interested in the defs when discovering interferences.

This is a 28% speedup running StrongPHIElimination on 403.gcc.

llvm-svn: 122596
 2010-12-28 10:49:33 +00:00
Duncan Sands
cc5a4497fd Pacify the compiler. BestWeight cannot in fact be used uninitialized 
in this function, but the compiler was warning that it might be when
doing a release build.

llvm-svn: 122595
 2010-12-28 10:07:15 +00:00
Duncan Sands
4799c69192 Fix warning about size potentially being used uninitialized 
when doing a release build.

llvm-svn: 122594
 2010-12-28 10:02:42 +00:00
Duncan Sands
1395f115d8 Silence gcc warning about an unused variable when doing a release build. 
llvm-svn: 122593
 2010-12-28 09:41:15 +00:00
Rafael Espindola
c97d642bf7 Relax address updates in the eh_frame section. 
llvm-svn: 122591
 2010-12-28 05:39:27 +00:00
Rafael Espindola
0552cb0638 Start adding basic support for emitting the call frame instructions. 
llvm-svn: 122590
 2010-12-28 04:15:37 +00:00
Michael J. Spencer
b604751adb Support/Path: Deprecate Path::hasMagicNumber and replace all uses with fs::has_magic. 
llvm-svn: 122589
 2010-12-28 01:49:21 +00:00
Michael J. Spencer
6d174b7e25 Fix typo. 
llvm-svn: 122588
 2010-12-28 01:49:10 +00:00
Michael J. Spencer
018595cf3a Support/PathV2: Implement has_magic. 
llvm-svn: 122587
 2010-12-28 01:49:01 +00:00
Cameron Zwarich
30f2239301 Change an assertion to assert what the code actually relies upon. 
llvm-svn: 122586
 2010-12-27 22:08:42 +00:00
Chris Lattner
2658d522b1 fix some issues Frits noticed, add AliasAnalysis as a dependency 
llvm-svn: 122585
 2010-12-27 18:39:08 +00:00
Rafael Espindola
12c30aed07 Add support for .cfi_lsda. 
llvm-svn: 122584
 2010-12-27 15:56:22 +00:00
Daniel Dunbar
2d0cf8e149 MC/Mach-O/Thumb: Select appropriate relocation types for Thumb. 
llvm-svn: 122583
 2010-12-27 14:49:49 +00:00
Cameron Zwarich
cfdb10a1bb Land a first cut at StrongPHIElimination. There are only 5 new test failures 
when running without the verifier, and I have not yet checked them to see if
the new results are still correct. There are more verifier failures, but they
all seem to be additional occurrences of verifier failures that occur with the
existing PHIElimination pass. There are a few obvious issues with the code:

1) It doesn't properly update the register equivalence classes during copy
insertion, and instead recomputes them before merging live intervals and
renaming registers. I wanted to keep this first patch simple for debugging
purposes, but it shouldn't be very hard to do this.

2) It doesn't mix the renaming and live interval merging with the copy insertion
process, which leads to a lot of virtual register churn. Virtual registers and
live intervals are created, only to later be merged into others. The code should
be smarter and only create a new virtual register if there is no existing
register in the same congruence class.

3) In one place the code uses a DenseMap per basic block, which is unnecessary
heap allocation. There should be an inline storage version of DenseMap.

I did a quick compile-time test of running llc on 403.gcc with and without
StrongPHIElimination. It is slightly slower with StrongPHIElimination, because
the small decrease in the coalescer runtime can't beat the increase in phi
elimination runtime. Perhaps fixing the above performance issues will narrow
the gap.

I also haven't yet run any tests of the quality of the generated code.

llvm-svn: 122582
 2010-12-27 10:08:19 +00:00
Cameron Zwarich
66289e34e1 Add knowledge of phi-def and phi-kill valnos to MachineVerifier's predecessor 
valno verification. The "Different value live out of predecessor" check is
incorrect in the case of phi-def valnos, so just skip that check for phi-def
valnos and instead check that all of the valnos for predecessors have phi-kill.
Fixes PR8863.

llvm-svn: 122581
 2010-12-27 05:17:23 +00:00
Michael J. Spencer
26654048d7 Support/PathV1: Deprecate GetRootDirectory. 
llvm-svn: 122580
 2010-12-27 03:21:41 +00:00
Rafael Espindola
7f947794d7 Handle reloc_riprel_4byte_movq_load. Should make the bots happy. 
llvm-svn: 122579
 2010-12-27 02:03:24 +00:00
Rafael Espindola
e7e67fce10 Add support for the same encodings of the personality function that gnu as 
supports.

llvm-svn: 122577
 2010-12-27 00:36:05 +00:00
Benjamin Kramer
30e1ba0fcc BuildLibCalls: Nuke EmitMemCpy, EmitMemMove and EmitMemSet. They are dead and superseded by IRBuilder. 
llvm-svn: 122576
 2010-12-27 00:25:32 +00:00
Benjamin Kramer
c66455a774 SimplifyLibCalls: Use IRBuilder to simplify code. 
llvm-svn: 122575
 2010-12-27 00:16:46 +00:00
Chris Lattner
a4249272b5 have loop-idiom nuke instructions that feed stores that get removed. 
llvm-svn: 122574
 2010-12-27 00:03:23 +00:00
Chris Lattner
d4daf9f002 implement enough of the memset inference algorithm to recognize and insert 
memsets.  This is still missing one important validity check, but this is enough
to compile stuff like this:

void test0(std::vector<char> &X) {
  for (std::vector<char>::iterator I = X.begin(), E = X.end(); I != E; ++I)
    *I = 0;
}

void test1(std::vector<int> &X) {
  for (long i = 0, e = X.size(); i != e; ++i)
    X[i] = 0x01010101;
}

With:
 $ clang t.cpp -S -o - -O2 -emit-llvm | opt -loop-idiom | opt -O3 | llc 

to:

__Z5test0RSt6vectorIcSaIcEE:            ## @_Z5test0RSt6vectorIcSaIcEE
## BB#0:                                ## %entry
	subq	$8, %rsp
	movq	(%rdi), %rax
	movq	8(%rdi), %rsi
	cmpq	%rsi, %rax
	je	LBB0_2
## BB#1:                                ## %bb.nph
	subq	%rax, %rsi
	movq	%rax, %rdi
	callq	___bzero
LBB0_2:                                 ## %for.end
	addq	$8, %rsp
	ret
...
__Z5test1RSt6vectorIiSaIiEE:            ## @_Z5test1RSt6vectorIiSaIiEE
## BB#0:                                ## %entry
	subq	$8, %rsp
	movq	(%rdi), %rax
	movq	8(%rdi), %rdx
	subq	%rax, %rdx
	cmpq	$4, %rdx
	jb	LBB1_2
## BB#1:                                ## %for.body.preheader
	andq	$-4, %rdx
	movl	$1, %esi
	movq	%rax, %rdi
	callq	_memset
LBB1_2:                                 ## %for.end
	addq	$8, %rsp
	ret

llvm-svn: 122573
 2010-12-26 23:42:51 +00:00
Chris Lattner
9007b56712 start using irbuilder to make mem intrinsics in a few passes. 
llvm-svn: 122572
 2010-12-26 22:57:41 +00:00
Chris Lattner
a46fd80777 add methods to IRBuilder to create memcpy/memset/memmove. 
llvm-svn: 122571
 2010-12-26 22:49:25 +00:00
Rafael Espindola
e9e6794917 Fix .cfi_personality on 32 bit systems. 
llvm-svn: 122570
 2010-12-26 22:47:37 +00:00
Rafael Espindola
2ebe553431 Add support for @note. Patch by Jörg Sonnenberger. 
llvm-svn: 122568
 2010-12-26 21:30:59 +00:00
Chris Lattner
27961b5180 sketch more of this out. 
llvm-svn: 122567
 2010-12-26 20:45:45 +00:00
Rafael Espindola
99f1527316 Add basic support for .cfi_personality. 
llvm-svn: 122566
 2010-12-26 20:20:31 +00:00
Chris Lattner
c56d20aa48 move isBytewiseValue out to ValueTracking.h/cpp 
llvm-svn: 122565
 2010-12-26 20:15:01 +00:00
Chris Lattner
73f562af94 actually add the file... 
llvm-svn: 122563
 2010-12-26 19:39:38 +00:00
Chris Lattner
e210c31646 Start of a pass for recognizing memset and memcpy idioms. 
No functionality yet.

llvm-svn: 122562
 2010-12-26 19:32:44 +00:00
Benjamin Kramer
626fccab8b Simplify code. 
llvm-svn: 122561
 2010-12-26 15:23:45 +00:00
Chris Lattner
a6f2b8316f fix some sort of weird pasto 
llvm-svn: 122560
 2010-12-26 12:05:11 +00:00
Chris Lattner
eec079a470 add a note 
llvm-svn: 122559
 2010-12-26 03:53:31 +00:00
Chris Lattner
2129ce0891 Generalize a previous change, fixing PR8855 - an valid large immediate 
rejected by the mc assembler.

llvm-svn: 122557
 2010-12-25 21:36:35 +00:00
Chris Lattner
a73a53e67f don't lose TD info 
llvm-svn: 122556
 2010-12-25 20:52:04 +00:00
Chris Lattner
38d6d6d367 switch the inliner alignment enforcement stuff to use the 
getOrEnforceKnownAlignment function, which simplifies the code
and makes it stronger.

llvm-svn: 122555
 2010-12-25 20:42:38 +00:00
Chris Lattner
c4cb20b9bf Move getOrEnforceKnownAlignment out of instcombine into Transforms/Utils. 
llvm-svn: 122554
 2010-12-25 20:37:57 +00:00