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Author SHA1 Message Date
Chris Lattner
1add46ddfa Carve out a place in instcombine to put transformations which work knowing that their 
result is non-zero.  Implement an example optimization (PR9814), which allows us to
transform:
  A / ((1 << B) >>u 2)
into:
  A >>u (B-2)

which we compile into:

_divu3:                                 ## @divu3
	leal	-2(%rsi), %ecx
	shrl	%cl, %edi
	movl	%edi, %eax
	ret

instead of:

_divu3:                                 ## @divu3
	movb	%sil, %cl
	movl	$1, %esi
	shll	%cl, %esi
	shrl	$2, %esi
	movl	%edi, %eax
	xorl	%edx, %edx
	divl	%esi, %eax
	ret



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131860 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 18:18:41 +00:00
Johnny Chen
75f4296c7c Fix Bug 9386 - ARM disassembler failed to disassemble conditional bx 
Modified the patch to .td file supplied by Jyun-Yan You.  Add a test case and
modified ARMDisassemblerCore.cpp a little bit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131859 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 17:51:04 +00:00
Chris Lattner
4f81b54192 Fix PR9815: I was trying to get out of "generating code and then 
failing to form a memset, then having to delete it" but my approximation
isn't safe for self recurrent loops.  Instead of doign a hack, just
do it the right way.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131858 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 17:39:56 +00:00
Frits van Bommel
5649ba70fb Add a parameter to ConstantFoldTerminator() that callers can use to ask it to also clean up the condition of any conditional terminator it folds to be unconditional, if that turns the condition into dead code. This just means it calls RecursivelyDeleteTriviallyDeadInstructions() in strategic spots. It defaults to the old behavior. 
I also changed -simplifycfg, -jump-threading and -codegenprepare to use this to produce slightly better code without any extra cleanup passes (AFAICT this was the only place in -simplifycfg where now-dead conditions of replaced terminators weren't being cleaned up). The only other user of this function is -sccp, but I didn't read that thoroughly enough to figure out whether it might be holding pointers to instructions that could be deleted by this.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131855 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 16:24:18 +00:00
Chris Lattner
8480aba5ec another typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131854 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 15:44:02 +00:00
Chris Lattner
947f0a8efa fix comment typo 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131853 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 15:34:37 +00:00
Chris Lattner
4d9255057a I missed a checking with my GVN change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131851 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 07:20:02 +00:00
Chris Lattner
8645d1acc0 insertvalue takes a variable number of arguments, document this, fixing PR9935. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131850 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 07:18:08 +00:00
Chris Lattner
98a42b2fc3 fix PR9856, an incorrectly conservative assertion: a global can be 
"stored once" even if its address is compared.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131849 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 07:15:13 +00:00
Chris Lattner
9e7bc05ad7 fix PR9841 by having GVN not process dead loads. This was 
causing it to get into infinite loops when it would widen a 
load (which can necessarily leave around dead loads).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131847 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 07:03:34 +00:00
Chris Lattner
0e959394ad remove a trivial test, make some other tests less trivial. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131846 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 07:02:43 +00:00
Chris Lattner
208d92c143 make this test less trivial. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131845 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 06:59:33 +00:00
Chris Lattner
3e8984a0c4 initialize and finalize function passes, pointed out by Cameron. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131843 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 06:44:19 +00:00
Chris Lattner
c4cb237ca6 fix a bug for hosts without round, PR8893. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131842 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 06:03:53 +00:00
Chris Lattner
b6fcf4cfbc move PR9408 here. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131841 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 05:45:06 +00:00
Nick Lewycky
bec6a19289 Commit test change, forgotten as part of r131838. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131839 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 05:31:47 +00:00
Nick Lewycky
6d55f2269e Teach the inliner to emit llvm.lifetime.start/end, to scope the local variables 
of the inlinee to the code representing the original function.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131838 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 05:22:10 +00:00
Chris Lattner
9063b55f9b switch to using a smallvector to avoid allocations for most normal size instructions. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131837 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 04:53:24 +00:00
Chris Lattner
97ff42d51d tidy some things up. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131836 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 04:52:24 +00:00
Chris Lattner
1a55c419a6 Fix some minor typos and grammar. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131835 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 04:44:48 +00:00
Charles Davis
38ea9eecd7 Implement emission of all Win64 exception tables. Make the COFF streamer emit 
these tables.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131833 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 04:15:07 +00:00
Charles Davis
3185f5c353 Make the COFF streamer emit unwind info when processing a .seh_handlerdata 
directive.

Implement emission of Win64 EH unwind info.

Pull in <cassert> in MCWin64EH.h so it can use the assert() macro.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131832 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 03:01:05 +00:00
Nick Lewycky
c7e38e8f3f Fix grammar in test. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131831 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 01:16:00 +00:00
Charles Davis
edeecbff0e Don't allow unaligned offsets and sizes in the Win64 EH directives. 
Also, fix threshold for 'Big' register saves.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131830 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:56:20 +00:00
Chris Lattner
9bb4a2ae8a random comment cleanups. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131829 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:50:53 +00:00
Chris Lattner
efce071fd6 fix a file system case sensitivity issue. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131828 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:37:51 +00:00
Chris Lattner
dcef346948 remove StandardPasses, it has been replaced with PassManagerBuilder 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131827 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:30:45 +00:00
Chris Lattner
52b28896c8 switch opt to using PassManagerBuilder.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131824 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:21:33 +00:00
Chris Lattner
9d70b6b306 switch llvm-ld. It has a terrible mechanism that people can add extra 
passes, it should be converted to use extension points.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131823 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:21:15 +00:00
Chris Lattner
817a01ffb2 switch bugpoint and liblto to PassManagerBuilder. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131821 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:20:07 +00:00
Chris Lattner
92a9cb6594 add support for LTO passes. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131820 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:14:20 +00:00
Chris Lattner
402d9d9935 eliminate dependence on StandardPasses.h. The code generator's pass pipeline 
should eventually convert to PMBuilder, but I don't plan to do this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131819 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:13:44 +00:00
Charles Davis
f2007b3c19 Include DataTypes.h from this header to get the uint*_t types. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131817 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:05:26 +00:00
Charles Davis
ba55b8f3e4 Allow access to the .pdata and .xdata sections through the TargetAsmInfo 
class.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131816 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-22 00:03:24 +00:00
Chris Lattner
f5be7bdc90 add an extension point mechanism that allow plugins to add stuff to 
the pass manager.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131814 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 23:50:37 +00:00
Nick Lewycky
0cf51561ed Add CreateLifetimeStart and CreateLifetimeEnd to the IRBuilder, with plans to 
use these soon.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131812 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 23:14:36 +00:00
Duncan Sands
d22920aae8 Revert commit 131781, to see if it fixes the x86-64 dragonegg buildbot. 
Original log message:
When BasicAA can determine that two pointers have the same base but
differ by a dynamic offset, return PartialAlias instead of MayAlias.
See the comment in the code for details. This fixes PR9971.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131809 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 20:54:46 +00:00
Chris Lattner
ae6d5dc715 add a new PassManagerBuilder class to replace StandardPasses.h 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131807 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 20:39:42 +00:00
Chris Lattner
40f5fbcc5c add a copy ctor to TargetLibraryInfo. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131806 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 20:09:13 +00:00
Eli Friedman
21c60904ce PR7952: Make isa<> use the same logic as cast<>, so that they both work 
consistently.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131803 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 19:13:10 +00:00
Benjamin Kramer
b22da2a72c X86: smulo -> add is now done target-independently in DAGCombiner, remove the patterns. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131801 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 18:32:01 +00:00
Benjamin Kramer
f55d26e788 Implement mulo x, 2 -> addo x, x in DAGCombiner. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131800 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 18:31:55 +00:00
Benjamin Kramer
a0962766ba Merge and FileCheckize test cases. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131799 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 18:31:48 +00:00
Benjamin Kramer
cd89d4d524 Revert "InstCombine: Turn mul.with.overflow(X, 2) into the cheaper add.with.overflow(X, X)" 
It's better to do this in codegen, mul.with.overflow(X, 2) is more canonical because it has only one use on "X".

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131798 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 18:31:42 +00:00
Charles Davis
81f3830f2e Don't allow .seh_handler and .seh_handlerdata directives inside chained 
unwind areas.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131795 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 17:36:25 +00:00
Charles Davis
321fe74b2d A handler for a function in the Win64 EH scheme can be both an unwind handler 
and an exception handler. Handle that case.

Also, add an 'Emitted' member to the MCWin64EHUnwindInfo struct. It will be
needed later.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131791 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 15:57:49 +00:00
Benjamin Kramer
c21b205f93 InstCombine: Turn mul.with.overflow(X, 2) into the cheaper add.with.overflow(X, X) 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131789 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 09:22:06 +00:00
Cameron Zwarich
37fed38ec1 Fix PR9978 by adding RIP to GR64_TC so it can be used as an address in PIC code. It 
is already in GR64 for the same reasons. Since it isn't allocatable it can't cause
any problems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131787 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 04:13:49 +00:00
Akira Hatanaka
52106e1e25 Use the correct register to access stack frame objects. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131785 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 03:01:03 +00:00
Akira Hatanaka
f346c69530 Insert instructions that copy $sp to or from $fp at the right locations. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131784 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-05-21 02:29:26 +00:00