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5674 Commits

Author SHA1 Message Date
Evan Cheng
eae1bb9779 Allow -inline-threshold override default threshold even if compiling to optimize for size. 
llvm-svn: 83274
 2009-10-04 06:13:54 +00:00
Douglas Gregor
b4e6fce681 Remove GVNPRE.cpp from the CMake makefile 
llvm-svn: 83194
 2009-10-01 05:30:05 +00:00
Chris Lattner
857ed445a8 remove the GVNPRE pass. It has been subsumed by the GVN pass. 
Ok'd by Owen.

llvm-svn: 83193
 2009-10-01 02:18:36 +00:00
Dan Gohman
2ecc146f0c Fix this code so that it doesn't try to iterate through a std::vector 
while calling changeImmediateDominator, which removes elements from the
vector. This fixes PR5097.

llvm-svn: 83166
 2009-09-30 20:54:16 +00:00
Dan Gohman
9776ad2192 Remove a redundant #ifndef and add an assertion string. 
llvm-svn: 82991
 2009-09-28 14:38:19 +00:00
Dan Gohman
f31dae3931 Convert LoopSimplify and LoopExtractor from FunctionPass to LoopPass. 
llvm-svn: 82990
 2009-09-28 14:37:51 +00:00
Chris Lattner
d77fb17b28 The select instruction is not neccesarily in the same block as the 
phi nodes.  Make sure to phi translate from the right block. 

This fixes a llvm-building-llvm failure on GVN-PRE.cpp

llvm-svn: 82970
 2009-09-28 06:49:44 +00:00
Chris Lattner
2a85cfd972 simplify some code. 
llvm-svn: 82936
 2009-09-27 21:46:50 +00:00
Chris Lattner
75a5d76294 The bitcast case is not needed here: instcombine turns icmp(bitcast(x), null) -> icmp(x, null) already. 
llvm-svn: 82935
 2009-09-27 21:42:46 +00:00
Chris Lattner
e024fd6b47 calls are already unmovable, malloc doesn't need a special case. 
llvm-svn: 82933
 2009-09-27 21:36:19 +00:00
Chris Lattner
8a77e8b353 calls to external functions are already marked overdefined, special casing 
malloc isn't needed.

llvm-svn: 82932
 2009-09-27 21:35:11 +00:00
Chris Lattner
bb29bb4e16 calls are already handled, malloc doesn't need a special case. 
llvm-svn: 82931
 2009-09-27 21:33:46 +00:00
Chris Lattner
24af6de20a calls are rejected above, no need to special case malloc here. 
llvm-svn: 82929
 2009-09-27 21:31:39 +00:00
Chris Lattner
0cfb82cf8c remove special handling of bitcast(malloc), it will be handled 
when the loop inspects the bitcast operand.

llvm-svn: 82928
 2009-09-27 21:29:28 +00:00
Chris Lattner
3f320467b5 unlike the malloc instruction, "malloc" calls do not claim to be readonly, just nounwind. 
llvm-svn: 82927
 2009-09-27 21:23:38 +00:00
Chris Lattner
7a9e470ddc allow pushing icmps through phis with multiple uses and across critical edges. 
These are important to push up to encourage jump threading.  This shrinks 176.gcc a bit.

llvm-svn: 82923
 2009-09-27 20:46:36 +00:00
Chris Lattner
f7db1f1a3a Enhance the previous fix for PR4895 to allow more values than just 
simple constants for the true/false value of the select.  We now
do phi translation etc.  This really fixes PR4895 :)

llvm-svn: 82917
 2009-09-27 20:18:49 +00:00
Chris Lattner
0af7f0ceaf implement PR4895, by making FoldOpIntoPhi handle select conditions 
that are phi nodes.  Also tighten up FoldOpIntoPhi to treat constantexpr
operands to phis just like other variables, avoiding moving constantexpr
computations around.

Patch by Daniel Dunbar.

llvm-svn: 82913
 2009-09-27 19:57:57 +00:00
Dan Gohman
641ab5a61e Grab an LLVM Context from an instruction that exists rather than one 
that is deleted in some situations. This fixes a use-after-free.

llvm-svn: 82903
 2009-09-27 16:10:30 +00:00
Dan Gohman
fa43cefae4 Tell ScalarEvolution to forget everything it knows about a loop before 
rotating the loop, since loop rotation is a very significant change.

llvm-svn: 82901
 2009-09-27 15:37:03 +00:00
Nick Lewycky
d21c325f09 Instruction::clone does not need to take an LLVMContext&. Remove that and 
update all the callers.

llvm-svn: 82889
 2009-09-27 07:38:41 +00:00
Dan Gohman
0a396aa546 Fix SimplifyLibCalls to transfer attributes from callees rather than 
calls, since direct calls don't always reflect the attributes of their
callees.

llvm-svn: 82867
 2009-09-26 18:10:13 +00:00
Dan Gohman
d585364b0b Rename ConstantFP's getInf to getInfinity. 
llvm-svn: 82823
 2009-09-25 23:40:21 +00:00
Dan Gohman
d564cd42d9 Transform pow(x, 0.5) to (x == -inf ? inf : fabs(sqrt(x))), which is 
typically faster then doing a general pow.

llvm-svn: 82819
 2009-09-25 23:10:17 +00:00
Torok Edwin
193d22fa77 Constant propagating byval pointer is safe if function is readonly. 
llvm-svn: 82700
 2009-09-24 18:33:42 +00:00
Torok Edwin
81fe296f15 Don't constant propagate byval pointers, since they are not really pointers, but 
rather structs passed by value.
This fixes PR5038.

llvm-svn: 82689
 2009-09-24 09:47:18 +00:00
Dale Johannesen
1b76c2ca48 A minor improvment in accuracy to inline cost 
computation, and some cosmetics.

llvm-svn: 82660
 2009-09-23 22:05:24 +00:00
Chris Lattner
f5afe18457 tidy up 
llvm-svn: 82488
 2009-09-21 22:26:02 +00:00
Chris Lattner
1d9ca20bf5 big endian systems shift by bits too, hopefully this will fix the ppc 
bootstrap problems.

llvm-svn: 82464
 2009-09-21 17:55:47 +00:00
Dan Gohman
3359b05815 Nick pointed out that DominanceFrontier and DominanceTree are preserved 
by setPreservesCFG().

llvm-svn: 82463
 2009-09-21 17:54:42 +00:00
Dan Gohman
ea9d53d563 Remove the special-case for constants in PHI nodes; it's not really 
helpful, and it didn't correctly handle the case of constants input
to PHIs for backedges.

llvm-svn: 82462
 2009-09-21 17:53:35 +00:00
Chris Lattner
b1c7502032 fix PR5016, a crash I introduced in GVN handing first class 
arrays and structs, which cannot be bitcast to integers.

llvm-svn: 82460
 2009-09-21 17:24:04 +00:00
Chris Lattner
45b58ae047 enable non-local analysis and PRE of large store -> little load. 
This doesn't kick in too much because of phi translation issues,
but this can be resolved in the future.

llvm-svn: 82447
 2009-09-21 06:48:08 +00:00
Chris Lattner
8debc9ab3e convert an std::pair to an explicit struct. 
llvm-svn: 82446
 2009-09-21 06:30:24 +00:00
Chris Lattner
71d74ff16b move some functions, add a comment. 
llvm-svn: 82444
 2009-09-21 06:24:16 +00:00
Chris Lattner
da0499f01e split HandleLoadFromClobberingStore in two pieces: one that does the 
analysis, one that does the xform.

llvm-svn: 82443
 2009-09-21 06:22:46 +00:00
Chris Lattner
97e1feed14 Improve GVN to be able to forward substitute a small load 
from a piece of a large store when both are in the same block.

This allows clang to compile the testcase in PR4216 to this code:

_test_bitfield:
	movl	4(%esp), %eax
	movl	%eax, %ecx
	andl	$-65536, %ecx
	orl	$32962, %eax
	andl	$40186, %eax
	orl	%ecx, %eax
	ret

This is not ideal, but is a whole lot better than the code produced
by llvm-gcc:

_test_bitfield:
	movw	$-32574, %ax
	orw	4(%esp), %ax
	andw	$-25350, %ax
	movw	%ax, 4(%esp)
	movw	7(%esp), %cx
	shlw	$8, %cx
	movzbl	6(%esp), %edx
	orw	%cx, %dx
	movzwl	%dx, %ecx
	shll	$16, %ecx
	movzwl	%ax, %eax
	orl	%ecx, %eax
	ret

and dramatically better than that produced by gcc 4.2:

_test_bitfield:
	pushl	%ebx
	call	L3
"L00000000001$pb":
L3:
	popl	%ebx
	movl	8(%esp), %eax
	leal	0(,%eax,4), %edx
	sarb	$7, %dl
	movl	%eax, %ecx
	andl	$7168, %ecx
	andl	$-7201, %ebx
	movzbl	%dl, %edx
	andl	$1, %edx
	sall	$5, %edx
	orl	%ecx, %ebx
	orl	%edx, %ebx
	andl	$24, %eax
	andl	$-58336, %ebx
	orl	%eax, %ebx
	orl	$32962, %ebx
	movl	%ebx, %eax
	popl	%ebx
	ret

llvm-svn: 82439
 2009-09-21 05:57:11 +00:00
Chris Lattner
50c869bb19 formatting cleanups, no functionality change. 
llvm-svn: 82426
 2009-09-21 02:42:51 +00:00
Chris Lattner
b7d34131d1 Move CoerceAvailableValueToLoadType earlier in GVN.cpp. Hook it up 
so that nonlocal and partially redundant loads can use it as well.
The testcase shows examples of craziness this can handle.  This triggers
*many* times in 176.gcc.

llvm-svn: 82403
 2009-09-20 20:09:34 +00:00
Chris Lattner
279ec561c6 change the interface to CoerceAvailableValueToLoadType to be 
more generic.

llvm-svn: 82402
 2009-09-20 19:31:14 +00:00
Chris Lattner
6bae20046f enhance GVN to forward substitute a stored value to a load 
(and load -> load) when the base pointers must alias but when
they are different types.  This occurs very very frequently in
176.gcc and other code that uses bitfields a lot.

llvm-svn: 82399
 2009-09-20 19:03:47 +00:00
Daniel Dunbar
378331a13d Tabs -> spaces, and remove trailing whitespace. 
llvm-svn: 82355
 2009-09-20 02:20:51 +00:00
Nick Lewycky
3b7df4bbd5 Remove the default value for ConstantStruct::get's isPacked parameter and 
update the code which was broken by this.

llvm-svn: 82327
 2009-09-19 20:30:26 +00:00
Victor Hernandez
fe5347d782 Enhance transform passes so that they apply the same tranforms to malloc calls as to MallocInst. 
Reviewed by Dan Gohman.

llvm-svn: 82300
 2009-09-18 22:35:49 +00:00
Victor Hernandez
065bc44d01 Update malloc call creation code (AllocType is now the element type of the malloc, not the resulting type). 
In getMallocArraySize(), fix bug in the case that array size is the product of 2 constants.

Extend isArrayMalloc() and getMallocArraySize() to handle case where malloc is used as char array.

Ensure that ArraySize in LowerAllocations::runOnBasicBlock() is correct type.

Extend Instruction::isSafeToSpeculativelyExecute() to handle malloc calls.

Add verification for malloc calls.

Reviewed by Dan Gohman.

llvm-svn: 82257
 2009-09-18 19:20:02 +00:00
Daniel Dunbar
1ce602e5db Update CMake. 
llvm-svn: 82097
 2009-09-17 00:06:48 +00:00
Dan Gohman
752227ef24 Add a new pass for doing late hoisting of floating-point and vector 
constants out of loops. These aren't covered by the regular LICM
pass, because in LLVM IR constants don't require separate
instructions. They're not always covered by the MachineLICM pass
either, because it doesn't know how to unfold folded constant-pool
loads. This is somewhat experimental at this point, and off by
default.

llvm-svn: 82076
 2009-09-16 20:25:11 +00:00
Dan Gohman
c7e3d84790 Change FoldPHIArgBinOpIntoPHI to decline folding if it would introduce two 
phis, similar to the FoldPHIArgGEPIntoPHI change.

Also, delete some comments that don't reflect the code.

llvm-svn: 82053
 2009-09-16 16:50:24 +00:00
Andreas Neustifter
15e9f61d26 Reapplied r81355 with the problems fixed. 
(See http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090907/086737.html and
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20090907/086746.html)

llvm-svn: 82039
 2009-09-16 11:35:50 +00:00
Andreas Neustifter
3c9b4c4c75 Preserve ProfileInfo during CodeGenPrepare. 
llvm-svn: 82034
 2009-09-16 09:26:52 +00:00