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32 Commits

Author SHA1 Message Date
Chris Lattner
466ff4b5f1 continue making the world safe for ConstantDataVector. At this point, 
we should (theoretically optimize and codegen ConstantDataVector as well
as ConstantVector.

llvm-svn: 149116
 2012-01-27 03:08:05 +00:00
Chris Lattner
4218b7524c use Constant::getAggregateElement to simplify a bunch of code. 
llvm-svn: 148934
 2012-01-25 06:48:06 +00:00
Chris Lattner
473bdbaabc use ConstantVector::getSplat in a few places. 
llvm-svn: 148929
 2012-01-25 06:02:56 +00:00
Chris Lattner
380a325520 basic instcombine support for CDS. 
llvm-svn: 148806
 2012-01-24 14:31:22 +00:00
Nick Lewycky
d6260dc3cb Teach instcombine all sorts of great stuff about shifts that have exact, nuw or 
nsw bits on them.

llvm-svn: 147528
 2012-01-04 09:28:29 +00:00
Benjamin Kramer
0b4d2e3d2a InstCombine: Canonicalize (2^n)-1 - x into (2^n)-1 ^ x iff x is known to be smaller than 2^n. 
This has the obvious advantage of being commutable and is always a win on x86 because
const - x wastes a register there. On less weird architectures this may lead to
a regression because other arithmetic doesn't fuse with it anymore. I'll address that
problem in a followup.

llvm-svn: 147254
 2011-12-24 17:31:38 +00:00
Benjamin Kramer
355b353595 Stop emitting instructions with the name "tmp" they eat up memory and have to be uniqued, without any benefit. 
If someone prefers %tmp42 to %42, run instnamer.

llvm-svn: 140634
 2011-09-27 20:39:19 +00:00
Eli Friedman
2109f34467 Make demanded-elt simplification for shufflevector slightly stronger. Spotted by inspection. 
llvm-svn: 139768
 2011-09-15 01:14:29 +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
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
Evan Cheng
a3f5204c82 Revert r131664 and fix it in instcombine instead. rdar://9467055 
llvm-svn: 131708
 2011-05-20 00:54:37 +00:00
Eli Friedman
9f62600eb7 Make the demanded bits/elements optimizations preserve debug line information. 
I'm not sure this is quite ideal, but I can't really think of any better way to do it.

llvm-svn: 131616
 2011-05-19 01:20:42 +00:00
Stuart Hastings
719cee1aa8 X86 pmovsx/pmovzx ignore the upper half of their inputs. 
rdar://problem/6945110

llvm-svn: 131493
 2011-05-17 22:13:31 +00:00
Eli Friedman
50311331a7 PR9346: Prevent SimplifyDemandedBits from incorrectly introducing 
INT_MIN % -1.

llvm-svn: 127306
 2011-03-09 01:28:35 +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
Chris Lattner
c741c5d744 teach SimplifyDemandedBits that exact shifts demand the bits they 
are shifting out since they do require them to be zeros.  Similarly
for NUW/NSW bits of shl

llvm-svn: 125263
 2011-02-10 05:09:34 +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
Gabor Greif
a96e0eb251 use ArgOperand API 
llvm-svn: 107016
 2010-06-28 16:45:00 +00:00
Gabor Greif
c7140da218 use ArgOperand API 
llvm-svn: 106737
 2010-06-24 12:35:13 +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
Gabor Greif
428ca23bbd 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: 101364
 2010-04-15 10:49:53 +00:00
Duncan Sands
1b33dd3c83 There are two ways of checking for a given type, for example isa<PointerType>(T) 
and T->isPointerTy().  Convert most instances of the first form to the second form.
Requested by Chris.

llvm-svn: 96344
 2010-02-16 11:11:14 +00:00
Duncan Sands
2acaf3609c Uniformize the names of type predicates: rather than having isFloatTy and 
isInteger, we now have isFloatTy and isIntegerTy.  Requested by Chris!

llvm-svn: 96223
 2010-02-15 16:12:20 +00:00
Chris Lattner
9635fe03ca fix some problems handling large vectors reported in PR6230 
llvm-svn: 95616
 2010-02-08 23:56:03 +00:00
Duncan Sands
d6baca9159 Having RHSKnownZero and RHSKnownOne be alternative names for KnownZero and KnownOne 
(via APInt &RHSKnownZero = KnownZero, etc) seems dangerous and confusing to me: it
is easy not to notice this, and then wonder why KnownZero/RHSKnownZero changed
underneath you when you modified RHSKnownZero/KnownZero etc.  So get rid of this.
No intended functionality change (tested with "make check" + llvm-gcc bootstrap).

llvm-svn: 94802
 2010-01-29 06:18:46 +00:00
Duncan Sands
a3395c61b5 Fix PR6165. The bug was that LHSKnownZero was being and'd with DemandedMask 
when it should have been and'd with LowBits.  Fix that and while there beef
up the logic in the case of a negative LHS.

llvm-svn: 94745
 2010-01-28 17:22:42 +00:00
Chris Lattner
fbcc4eb5a5 move the 'SimplifyDemandedFoo' methods out to their own file, cutting 1K lines out of instcombine.cpp 
llvm-svn: 92465
 2010-01-04 07:17:19 +00:00