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127 Commits

Author SHA1 Message Date
Frits van Bommel
6c24f9c277 Migrate LLVM and Clang to use the new makeArrayRef(...) functions where previously explicit non-default constructors were used. 
Mostly mechanical with some manual reformatting.

llvm-svn: 135390
 2011-07-18 12:00:32 +00:00
Chris Lattner
e1fe7061ce land David Blaikie's patch to de-constify Type, with a few tweaks. 
llvm-svn: 135375
 2011-07-18 04:54:35 +00:00
Jay Foad
88fb4f4597 Convert InsertValueInst and ExtractValueInst APIs to use ArrayRef. 
llvm-svn: 135040
 2011-07-13 10:26:04 +00:00
Nick Lewycky
4a0f5218f2 Move onlyUsedByLifetimeMarkers to ValueTracking so that it can be used by other 
passes as well.

llvm-svn: 133904
 2011-06-27 04:20:45 +00:00
Chad Rosier
b87c4a6945 Renamed llvm.x86.sse42.crc32 intrinsics; crc64 doesn't exist. 
crc32.[8|16|32] have been renamed to .crc32.32.[8|16|32] and
crc64.[8|16|32] have been renamed to .crc32.64.[8|64].

llvm-svn: 132163
 2011-05-26 23:13:19 +00:00
Chris Lattner
c277b19e97 Teach valuetracking that byval arguments with a specified alignment are 
aligned.

Teach memcpyopt to not give up all hope when confonted with an underaligned
memcpy feeding an overaligned byval.  If the *source* of the memcpy can be
determined to be adequeately aligned, or if it can be forced to be, we can
eliminate the memcpy.

This addresses PR9794.  We now compile the example into:

define i32 @f(%struct.p* nocapture byval align 8 %q) nounwind ssp {
entry:
  %call = call i32 @g(%struct.p* byval align 8 %q) nounwind
  ret i32 %call
}

in both x86-64 and x86-32 mode.  We still don't get a tailcall though,
because tailcalls apparently can't handle byval.

llvm-svn: 131884
 2011-05-23 00:03:39 +00:00
Evan Cheng
a2e8770368 Teach ValueTracking about x86 crc32 intrinsics. 
llvm-svn: 131861
 2011-05-22 18:25:30 +00:00
Chris Lattner
0304b82f80 Fix a ton of comment typos found by codespell. Patch by 
Luis Felipe Strano Moraes!

llvm-svn: 129558
 2011-04-15 05:18:47 +00:00
Eli Friedman
823b0d6c77 Don't assume something which might be a constant expression is an instruction. 
Based on PR9429, but no testcase because I can't figure out how to trigger it
anymore given other changes to the relevant code.

llvm-svn: 128781
 2011-04-02 22:11:56 +00:00
Nick Lewycky
e8f6eb49ee Fix INT_MIN gotcha pointed out by Eli Friedman. 
llvm-svn: 128028
 2011-03-21 21:40:32 +00:00
Benjamin Kramer
5986a24bae Teach ComputeMaskedBits about sub nsw. 
llvm-svn: 127548
 2011-03-12 17:18:11 +00:00
Benjamin Kramer
d4ea449e7e ComputeMaskedBits: sub falls through to add, and sub doesn't have the same overflow semantics as add. 
Should fix the selfhost failures that started with r127463.

llvm-svn: 127465
 2011-03-11 14:46:49 +00:00
Nick Lewycky
cf0e3e88df Teach ComputeMaskedBits about nsw on add. I don't think there's anything we can 
do with nuw here, but sub and mul should be given similar treatment.
Fixes PR9343 #15!

llvm-svn: 127463
 2011-03-11 09:00:19 +00:00
Duncan Sands
41075b3ffb Fix PR9331. Simplified version of a patch by Jakub Staszak. 
llvm-svn: 127243
 2011-03-08 12:39:03 +00:00
Nick Lewycky
2cbaf887bb Add more analysis of the sign bit of an srem instruction. If the LHS is negative 
then the result could go either way. If it's provably positive then so is the
srem. Fixes PR9343 #7!

llvm-svn: 127146
 2011-03-07 01:50:10 +00:00
Nick Lewycky
fe02856d37 Fix comment. 
llvm-svn: 126645
 2011-02-28 09:18:11 +00:00
Nick Lewycky
dcc97b5f44 srem doesn't actually have the same resulting sign as its numerator, you could 
also have a zero when numerator = denominator. Reverts parts of r126635 and
r126637.

llvm-svn: 126644
 2011-02-28 09:17:39 +00:00
Nick Lewycky
dd5df7ef0a Teach value tracking to make use of flags in more situations. 
llvm-svn: 126642
 2011-02-28 08:02:21 +00:00
Nick Lewycky
aa03b76c53 Teach ValueTracking to look at the dividend when determining the sign bit of an 
srem instruction.

llvm-svn: 126637
 2011-02-28 06:52:12 +00:00
Chris Lattner
90786c35a5 Stores of null pointers should turn into memset, we weren't recognizing 
them as splat values.

llvm-svn: 126041
 2011-02-19 19:35:49 +00:00
Nick Lewycky
6380885ba1 Tolerate degenerate phi nodes that can occur in the middle of optimization 
passes. Fixes PR9112. Patch by Jakub Staszak!

llvm-svn: 125319
 2011-02-10 23:54:10 +00:00
Duncan Sands
659237307a Add a m_SignBit pattern for convenience. 
llvm-svn: 124656
 2011-02-01 08:50:33 +00:00
Duncan Sands
0587f785bf Fix typo: should have been testing that X was odd, not V. 
llvm-svn: 124533
 2011-01-29 13:27:00 +00:00
Duncan Sands
803522ec6f APInt has a method for determining whether a number is a power of 2 
which is more efficient than countPopulation - use it.

llvm-svn: 124283
 2011-01-26 08:44:16 +00:00
Duncan Sands
017a3d76f7 In which I discover that zero+zero is zero, d'oh! 
llvm-svn: 124188
 2011-01-25 15:14:15 +00:00
Duncan Sands
4d8a541ae2 See if this fixes llvm-gcc bootstrap. 
llvm-svn: 124184
 2011-01-25 12:15:09 +00:00
Duncan Sands
92b081bd42 According to my auto-simplifier the most common missed simplifications in 
optimized code are:
  (non-negative number)+(power-of-two) != 0 -> true
and
  (x | 1) != 0 -> true
Instcombine knows about the second one of course, but only does it if X|1
has only one use.  These fire thousands of times in the testsuite.

llvm-svn: 124183
 2011-01-25 09:38:29 +00:00
Dan Gohman
db0dc19c04 Give GetUnderlyingObject a TargetData, to keep it in sync 
with BasicAA's DecomposeGEPExpression, which recently began
using a TargetData. This fixes PR8968, though the testcase
is awkward to reduce.

Also, update several off GetUnderlyingObject's users
which happen to have a TargetData handy to pass it in.

llvm-svn: 124134
 2011-01-24 18:53:32 +00:00
Chris Lattner
dbb1b09731 fix an off-by-one bug that caused a crash analyzing 
ashr's with huge shift amounts, PR8896

llvm-svn: 122814
 2011-01-04 18:19:15 +00:00
Chris Lattner
c56d20aa48 move isBytewiseValue out to ValueTracking.h/cpp 
llvm-svn: 122565
 2010-12-26 20:15:01 +00:00
Nate Begeman
063d88d6fb Add vector versions of some existing scalar transforms to aid codegen in matching psign & pblend operations to the IR produced by clang/gcc for their C idioms. 
llvm-svn: 122105
 2010-12-17 23:12:19 +00:00
Dan Gohman
7c7b24af4d Reapply r121886, and also update DecomposeGEPExpression to keep 
it in sync.

llvm-svn: 121895
 2010-12-15 20:49:55 +00:00
Dan Gohman
4f6b802044 Revert r121886. DecomposeGEPExpression needs to be kept 
in sync.

llvm-svn: 121892
 2010-12-15 20:39:25 +00:00
Dan Gohman
8b09daa387 Strengthen GetUnderlyingObject using InstructionSimplify. 
While LLVM's main design is that analysis code shouldn't
go out of its way to understand code which hasn't been
InstCombined, analysis utility routines like this can
find themselves being called in the middle of transform
passes when instcombine hasn't had a chance to run.

llvm-svn: 121886
 2010-12-15 20:10:26 +00:00
Dan Gohman
295ba3ab26 Move Value::getUnderlyingObject to be a standalone 
function so that it can live in Analysis instead of
VMCore.

llvm-svn: 121885
 2010-12-15 20:02:24 +00:00
Jay Foad
79e18ed269 PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and 
zextOrTrunc(), and APSInt methods extend(), extOrTrunc() and new method
trunc(), to be const and to return a new value instead of modifying the
object in place.

llvm-svn: 121120
 2010-12-07 08:25:19 +00:00
Jay Foad
789e8ac4f7 PR5207: Rename overloaded APInt methods set(), clear(), flip() to 
setAllBits(), setBit(unsigned), etc.

llvm-svn: 120564
 2010-12-01 08:53:58 +00:00
Chris Lattner
58b829f94c move GetPointerBaseWithConstantOffset out of GVN into ValueTracking.h 
llvm-svn: 120476
 2010-11-30 22:25:26 +00:00
Jay Foad
c663d7e4f6 PR5207: Make APInt::set(), APInt::clear() and APInt::flip() return void. 
llvm-svn: 120413
 2010-11-30 09:02:01 +00:00
Chris Lattner
4dccd368f3 fix PR8063, a crash in globalopt in the malloc analysis code. 
llvm-svn: 113109
 2010-09-05 17:20:46 +00:00
Chris Lattner
bd80bd5d69 move gep decomposition out of ValueTracking into BasicAA. The form of 
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

Now with less tree breakingness.

llvm-svn: 111433
 2010-08-18 22:07:29 +00:00
Daniel Dunbar
3d68ce9eeb Revert r111375, "move gep decomposition out of ValueTracking into BasicAA. The 
form of", it doesn't pass tests.

llvm-svn: 111385
 2010-08-18 18:43:08 +00:00
Chris Lattner
2d584f0b0e move gep decomposition out of ValueTracking into BasicAA. The form of 
decomposition that it is doing is very basicaa specific and is only used
by basicaa.

llvm-svn: 111375
 2010-08-18 18:22:17 +00:00
Chris Lattner
49d0f29752 fix PR7589: In brief: 
gep P, (zext x) != gep P, (sext x)

DecomposeGEPExpression was getting this wrong, confusing
basicaa.

llvm-svn: 111352
 2010-08-18 04:28:19 +00:00
Gabor Greif
b86c04f740 use ArgOperand accessors 
llvm-svn: 106697
 2010-06-23 23:38:07 +00:00
Eric Christopher
e78496e5f1 Revert 101465, it broke internal OpenGL testing. 
Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.

llvm-svn: 101579
 2010-04-16 23:37:20 +00:00
Gabor Greif
e7d6812008 reapply r101434 
with a fix for self-hosting

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101465
 2010-04-16 15:33:14 +00:00
Gabor Greif
cd116e8c6a back out r101423 and r101397, they break llvm-gcc self-host on darwin10 
llvm-svn: 101434
 2010-04-16 01:16:20 +00:00
Gabor Greif
2e18d34d80 reapply r101364, which has been backed out in r101368 
with a fix

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101397
 2010-04-15 20:51:13 +00:00
Gabor Greif
6022150477 back out r101364, as it trips the linux nightlybot on some clang C++ tests 
llvm-svn: 101368
 2010-04-15 12:46:56 +00:00