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Author SHA1 Message Date
Chris Lattner
cf0fe8d813 strength reduce a ton of type equality tests to check the typeid (Through 
the new predicates I added) instead of going through a context and doing a
pointer comparison.  Besides being cheaper, this allows a smart compiler
to turn the if sequence into a switch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83297 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-05 05:54:46 +00:00
Chris Lattner
bbc33853a5 instcombine shouldn't delete all null checks for mallocs. 
This fixes PR5130.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83290 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-05 02:47:47 +00:00
Owen Anderson
08993acada Do away with the strange use of BitVectors in SSI, and just use normal sets. This makes the code much more C++/LLVM-ish. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83286 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-04 18:49:55 +00:00
Owen Anderson
216abab84f Fix a typo in the comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83283 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-04 17:52:13 +00:00
Owen Anderson
7aa3c781b4 SSI needs to require DT and DF transitively, since it uses them outside of its runOnFunction. 
Similarly, it can be marked setPreservesAll, since it does no work in its runOnFunction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83282 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-04 17:47:39 +00:00
Evan Cheng
a0479e5332 Allow -inline-threshold override default threshold even if compiling to optimize for size. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83274 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-04 06:13:54 +00:00
Douglas Gregor
8f3ec31133 Remove GVNPRE.cpp from the CMake makefile 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83194 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 05:30:05 +00:00
Chris Lattner
99be299edb remove the GVNPRE pass. It has been subsumed by the GVN pass. 
Ok'd by Owen.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83193 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-10-01 02:18:36 +00:00
Dan Gohman
5184635eda 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83166 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-30 20:54:16 +00:00
Dan Gohman
2d5dfd94e5 Remove a redundant #ifndef and add an assertion string. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82991 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 14:38:19 +00:00
Dan Gohman
d84db11333 Convert LoopSimplify and LoopExtractor from FunctionPass to LoopPass. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82990 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 14:37:51 +00:00
Chris Lattner
3ddfb21306 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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82970 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-28 06:49:44 +00:00
Chris Lattner
9b1de95593 simplify some code. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82936 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:46:50 +00:00
Chris Lattner
42ebefae8e The bitcast case is not needed here: instcombine turns icmp(bitcast(x), null) -> icmp(x, null) already. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82935 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:42:46 +00:00
Chris Lattner
06e4052699 calls are already unmovable, malloc doesn't need a special case. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82933 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:36:19 +00:00
Chris Lattner
32c0d2255f calls to external functions are already marked overdefined, special casing 
malloc isn't needed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82932 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:35:11 +00:00
Chris Lattner
4412d04876 calls are already handled, malloc doesn't need a special case. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82931 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:33:46 +00:00
Chris Lattner
68b1bbbc55 calls are rejected above, no need to special case malloc here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82929 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:31:39 +00:00
Chris Lattner
439044f4f9 remove special handling of bitcast(malloc), it will be handled 
when the loop inspects the bitcast operand.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82928 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:29:28 +00:00
Chris Lattner
2a9325ff2f unlike the malloc instruction, "malloc" calls do not claim to be readonly, just nounwind. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82927 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 21:23:38 +00:00
Chris Lattner
213cd61fa7 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82923 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 20:46:36 +00:00
Chris Lattner
c6df8f4d5f 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 :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82917 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 20:18:49 +00:00
Chris Lattner
5d1704ddbf 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82913 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 19:57:57 +00:00
Dan Gohman
f37cfed791 Grab an LLVM Context from an instruction that exists rather than one 
that is deleted in some situations. This fixes a use-after-free.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82903 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 16:10:30 +00:00
Dan Gohman
e6fe67b2fb Tell ScalarEvolution to forget everything it knows about a loop before 
rotating the loop, since loop rotation is a very significant change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82901 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 15:37:03 +00:00
Nick Lewycky
6776064d19 Instruction::clone does not need to take an LLVMContext&. Remove that and 
update all the callers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82889 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-27 07:38:41 +00:00
Dan Gohman
76926b6789 Fix SimplifyLibCalls to transfer attributes from callees rather than 
calls, since direct calls don't always reflect the attributes of their
callees.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82867 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-26 18:10:13 +00:00
Dan Gohman
a23643d5b7 Rename ConstantFP's getInf to getInfinity. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82823 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-25 23:40:21 +00:00
Dan Gohman
79cb840136 Transform pow(x, 0.5) to (x == -inf ? inf : fabs(sqrt(x))), which is 
typically faster then doing a general pow.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82819 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-25 23:10:17 +00:00
Torok Edwin
c338499525 Constant propagating byval pointer is safe if function is readonly. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82700 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-24 18:33:42 +00:00
Torok Edwin
30a94e3b42 Don't constant propagate byval pointers, since they are not really pointers, but 
rather structs passed by value.
This fixes PR5038.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82689 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-24 09:47:18 +00:00
Dale Johannesen
d5405a67d5 A minor improvment in accuracy to inline cost 
computation, and some cosmetics.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82660 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-23 22:05:24 +00:00
Chris Lattner
2b723a5e3d tidy up 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82488 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 22:26:02 +00:00
Chris Lattner
19ad784dac big endian systems shift by bits too, hopefully this will fix the ppc 
bootstrap problems.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82464 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 17:55:47 +00:00
Dan Gohman
471fbf9949 Nick pointed out that DominanceFrontier and DominanceTree are preserved 
by setPreservesCFG().


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82463 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 17:54:42 +00:00
Dan Gohman
5ee98e8713 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82462 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 17:53:35 +00:00
Chris Lattner
8b2bc3d574 fix PR5016, a crash I introduced in GVN handing first class 
arrays and structs, which cannot be bitcast to integers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82460 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 17:24:04 +00:00
Chris Lattner
4fbd14e80e 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82447 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 06:48:08 +00:00
Chris Lattner
879135145f convert an std::pair to an explicit struct. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82446 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 06:30:24 +00:00
Chris Lattner
ca74940fee move some functions, add a comment. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82444 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 06:24:16 +00:00
Chris Lattner
1ce0829e83 split HandleLoadFromClobberingStore in two pieces: one that does the 
analysis, one that does the xform.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82443 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 06:22:46 +00:00
Chris Lattner
eed919b1ba 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



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82439 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 05:57:11 +00:00
Chris Lattner
b2412a8bec formatting cleanups, no functionality change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82426 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-21 02:42:51 +00:00
Chris Lattner
771a5422e1 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82403 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 20:09:34 +00:00
Chris Lattner
6af4b7ce4d change the interface to CoerceAvailableValueToLoadType to be 
more generic.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82402 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 19:31:14 +00:00
Chris Lattner
bb6495cc67 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.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82399 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 19:03:47 +00:00
Daniel Dunbar
a279bc3da5 Tabs -> spaces, and remove trailing whitespace. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82355 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-20 02:20:51 +00:00
Nick Lewycky
c332fba828 Remove the default value for ConstantStruct::get's isPacked parameter and 
update the code which was broken by this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82327 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-19 20:30:26 +00:00
Victor Hernandez
83d63919bd Enhance transform passes so that they apply the same tranforms to malloc calls as to MallocInst. 
Reviewed by Dan Gohman.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82300 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-18 22:35:49 +00:00
Victor Hernandez
88d9839d07 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82257 91177308-0d34-0410-b5e6-96231b3b80d8
 2009-09-18 19:20:02 +00:00