3e334a42d7
Move onlyUsedByLifetimeMarkers to ValueTracking so that it can be used by other
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passes as well.
llvm-svn: 133904
2011-06-27 04:20:45 +00:00
b362884ca9
Renamed llvm.x86.sse42.crc32 intrinsics; crc64 doesn't exist.
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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
83791ced7b
Teach valuetracking that byval arguments with a specified alignment are
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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
2a746bfe36
Teach ValueTracking about x86 crc32 intrinsics.
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llvm-svn: 131861
2011-05-22 18:25:30 +00:00
0ab5e2cded
Fix a ton of comment typos found by codespell. Patch by
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Luis Felipe Strano Moraes!
llvm-svn: 129558
2011-04-15 05:18:47 +00:00
8baa2c7ad9
Don't assume something which might be a constant expression is an instruction.
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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
f0469af63e
Fix INT_MIN gotcha pointed out by Eli Friedman.
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llvm-svn: 128028
2011-03-21 21:40:32 +00:00
5acc751b6f
Teach ComputeMaskedBits about sub nsw.
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llvm-svn: 127548
2011-03-12 17:18:11 +00:00
391a946fa9
ComputeMaskedBits: sub falls through to add, and sub doesn't have the same overflow semantics as add.
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Should fix the selfhost failures that started with r127463.
llvm-svn: 127465
2011-03-11 14:46:49 +00:00
cc79973856
Teach ComputeMaskedBits about nsw on add. I don't think there's anything we can
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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
7dc3d47c34
Fix PR9331. Simplified version of a patch by Jakub Staszak.
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llvm-svn: 127243
2011-03-08 12:39:03 +00:00
e467979d0a
Add more analysis of the sign bit of an srem instruction. If the LHS is negative
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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
afe4a3062d
Fix comment.
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llvm-svn: 126645
2011-02-28 09:18:11 +00:00
66f4f22f7b
srem doesn't actually have the same resulting sign as its numerator, you could
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also have a zero when numerator = denominator. Reverts parts of r126635 and
r126637.
llvm-svn: 126644
2011-02-28 09:17:39 +00:00
c9aab8567b
Teach value tracking to make use of flags in more situations.
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llvm-svn: 126642
2011-02-28 08:02:21 +00:00
29dbbd12c1
Teach ValueTracking to look at the dividend when determining the sign bit of an
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srem instruction.
llvm-svn: 126637
2011-02-28 06:52:12 +00:00
acf6b0776a
Stores of null pointers should turn into memset, we weren't recognizing
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them as splat values.
llvm-svn: 126041
2011-02-19 19:35:49 +00:00
ac0b62c277
Tolerate degenerate phi nodes that can occur in the middle of optimization
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passes. Fixes PR9112. Patch by Jakub Staszak!
llvm-svn: 125319
2011-02-10 23:54:10 +00:00
4b397fcdc2
Add a m_SignBit pattern for convenience.
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llvm-svn: 124656
2011-02-01 08:50:33 +00:00
2e9e4f1be3
Fix typo: should have been testing that X was odd, not V.
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llvm-svn: 124533
2011-01-29 13:27:00 +00:00
8a33733228
APInt has a method for determining whether a number is a power of 2
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which is more efficient than countPopulation - use it.
llvm-svn: 124283
2011-01-26 08:44:16 +00:00
9e9d5b25e2
In which I discover that zero+zero is zero, d'oh!
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llvm-svn: 124188
2011-01-25 15:14:15 +00:00
fced7620f5
See if this fixes llvm-gcc bootstrap.
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llvm-svn: 124184
2011-01-25 12:15:09 +00:00
d395108394
According to my auto-simplifier the most common missed simplifications in
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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
0f124e1987
Give GetUnderlyingObject a TargetData, to keep it in sync
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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
c86e67e110
fix an off-by-one bug that caused a crash analyzing
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ashr's with huge shift amounts, PR8896
llvm-svn: 122814
2011-01-04 18:19:15 +00:00
9cb1035f94
move isBytewiseValue out to ValueTracking.h/cpp
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llvm-svn: 122565
2010-12-26 20:15:01 +00:00
7aa18bf46a
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.
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llvm-svn: 122105
2010-12-17 23:12:19 +00:00
05b18f143f
Reapply r121886, and also update DecomposeGEPExpression to keep
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it in sync.
llvm-svn: 121895
2010-12-15 20:49:55 +00:00
d02b65982e
Revert r121886. DecomposeGEPExpression needs to be kept
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in sync.
llvm-svn: 121892
2010-12-15 20:39:25 +00:00
949ab7889c
Strengthen GetUnderlyingObject using InstructionSimplify.
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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
a4fcd2418d
Move Value::getUnderlyingObject to be a standalone
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function so that it can live in Analysis instead of
VMCore.
llvm-svn: 121885
2010-12-15 20:02:24 +00:00
583abbc4df
PR5207: Change APInt methods trunc(), sext(), zext(), sextOrTrunc() and
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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
25a5e4ca1f
PR5207: Rename overloaded APInt methods set(), clear(), flip() to
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setAllBits(), setBit(unsigned), etc.
llvm-svn: 120564
2010-12-01 08:53:58 +00:00
e28618de59
move GetPointerBaseWithConstantOffset out of GVN into ValueTracking.h
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llvm-svn: 120476
2010-11-30 22:25:26 +00:00
15084f085d
PR5207: Make APInt::set(), APInt::clear() and APInt::flip() return void.
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llvm-svn: 120413
2010-11-30 09:02:01 +00:00
72d283c826
fix PR8063, a crash in globalopt in the malloc analysis code.
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llvm-svn: 113109
2010-09-05 17:20:46 +00:00
9f7500f57b
move gep decomposition out of ValueTracking into BasicAA. The form of
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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
fbeeb130d8
Revert r111375, "move gep decomposition out of ValueTracking into BasicAA. The
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form of", it doesn't pass tests.
llvm-svn: 111385
2010-08-18 18:43:08 +00:00
54fe883203
move gep decomposition out of ValueTracking into BasicAA. The form of
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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
a33edcb56c
fix PR7589: In brief:
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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
1abbde3103
use ArgOperand accessors
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llvm-svn: 106697
2010-06-23 23:38:07 +00:00
7258dcd77f
Revert 101465, it broke internal OpenGL testing.
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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
f375520f7b
reapply r101434
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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
403e9694f9
back out r101423 and r101397, they break llvm-gcc self-host on darwin10
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llvm-svn: 101434
2010-04-16 01:16:20 +00:00
33ae80bff7
reapply r101364, which has been backed out in r101368
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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
9fd00c7d25
back out r101364, as it trips the linux nightlybot on some clang C++ tests
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llvm-svn: 101368
2010-04-15 12:46:56 +00:00
aafd209632
rotate CallInst operands, i.e. move callee to the back
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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
0b4df0425f
Constify GetConstantStringInfo.
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llvm-svn: 101298
2010-04-14 22:20:45 +00:00
2a65429671
Fix a typo in ValueTracking that's causing instcombine to delete needed shift instructions.
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llvm-svn: 98416
2010-03-13 02:20:29 +00:00
Nick Lewycky