c7bc66dfc6
implement a FIXME: limit the depth that DecomposeGEPExpression goes the same
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way that getUnderlyingObject does it.
This fixes the 'DecomposeGEPExpression and getUnderlyingObject disagree!'
assertion on sqlite3.
llvm-svn: 90038
2009-11-28 15:12:41 +00:00
8e62d0a93d
limit the recursion depth of GetLinearExpression. This
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fixes a crash analyzing consumer-lame, which had an "%X = add %X, 1"
in unreachable code.
llvm-svn: 90000
2009-11-27 08:32:52 +00:00
1bf7ff704a
Implement PR1143 (at -m64) by making basicaa look through extensions. We
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previously already handled it at -m32 because there were no i32->i64
extensions for addressing.
llvm-svn: 89959
2009-11-26 18:53:33 +00:00
d7cabea8ca
fix two transposed lines duncan caught and add an explanatory comment.
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llvm-svn: 89958
2009-11-26 18:35:46 +00:00
9aa846956e
this todo is resolved.
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llvm-svn: 89957
2009-11-26 17:14:10 +00:00
29f82a1465
move DecomposeGEPExpression out into ValueTracking.cpp
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llvm-svn: 89956
2009-11-26 17:12:50 +00:00
4f0b47d9e7
remove some redundant braces
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llvm-svn: 89912
2009-11-26 01:50:12 +00:00
39dbfd3c58
Remove unused LLVMContext.
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llvm-svn: 89642
2009-11-23 03:29:18 +00:00
6a976bbcb7
Simplify ComputeMultiple so that it doesn't depend on TargetData.
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llvm-svn: 89175
2009-11-18 00:58:27 +00:00
4744488e8d
Add ComputeMultiple() analysis function that recursively determines if a Value V is a multiple of unsigned Base
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llvm-svn: 86675
2009-11-10 08:28:35 +00:00
8acf2956b8
Remove AllocationInst. Since MallocInst went away, AllocaInst is the only subclass of AllocationInst, so it no longer is necessary.
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llvm-svn: 84969
2009-10-23 21:09:37 +00:00
a3aaf85e23
Remove MallocInst from LLVM Instructions.
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llvm-svn: 84299
2009-10-17 01:18:07 +00:00
f6a987b784
Handle sqrt in CannotBeNegativeZero. absf and absl
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appear to be misspellings, removed in favor of fabs*.
llvm-svn: 82796
2009-09-25 20:54:50 +00:00
94262db4d4
Teach ValueTracking how to look through GlobalAliases. GlobalAliases are
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not folded in the constant folder because the constant folder doesn't
simplify ConstantExpr operands.
llvm-svn: 81864
2009-09-15 16:14:44 +00:00
0cdbc7a2ca
fix ComputeMaskedBits handling of zext/sext/trunc to work with vectors.
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This fixes PR4905
llvm-svn: 81174
2009-09-08 00:13:52 +00:00
4bc2825d0b
add some comments to describe the invariants.
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llvm-svn: 81173
2009-09-08 00:06:16 +00:00
18e03dd70c
Fix DbgStopPointInst->getFileName/getDirectory, broken by the MDNodification in
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r80406, and readd a -print-dbginfo test.
llvm-svn: 80778
2009-09-02 11:13:56 +00:00
05f11351ab
Handle TargetData with const.
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llvm-svn: 80262
2009-08-27 17:51:25 +00:00
5d5bc6d000
Use hasDefinitiveInitializer() instead of testing the same thing
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by hand, and fix a few places that were using hasInitializer() that
appear to depend on the initializer value.
llvm-svn: 79441
2009-08-19 18:20:44 +00:00
dea2358c68
Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden
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before performing optimizations based on constant string values.
llvm-svn: 79384
2009-08-19 00:11:12 +00:00
55f1c09e31
Push LLVMContexts through the IntegerType APIs.
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llvm-svn: 78948
2009-08-13 21:58:54 +00:00
a72f856aa4
Don't assume that external global variables are aligned at their preferred
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alignment. Only the minimum alignment guaranteed by the ABI may be assumed.
llvm-svn: 78668
2009-08-11 15:50:03 +00:00
a6d0afcb74
Fix a bunch of namespace pollution.
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llvm-svn: 78363
2009-08-07 01:32:21 +00:00
5a1acd9912
Move a few more APIs back to 2.5 forms. The only remaining ones left to change back are
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metadata related, which I'm waiting on to avoid conflicting with Devang.
llvm-svn: 77721
2009-07-31 20:28:14 +00:00
b292b8ce70
Move more code back to 2.5 APIs.
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llvm-svn: 77635
2009-07-30 23:03:37 +00:00
ca414c7cae
Remove Value::getNameLen
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llvm-svn: 77148
2009-07-26 08:34:35 +00:00
47db941fd3
Get rid of the Pass+Context magic.
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llvm-svn: 76702
2009-07-22 00:24:57 +00:00
80ca01c466
Add a new Operator class, for handling Instructions and ConstantExprs
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in a convenient manner, factoring out some common code from
InstructionCombining and ValueTracking. Move the contents of
BinaryOperators.h into Operator.h and use Operator to generalize them
to support ConstantExprs as well as Instructions.
llvm-svn: 76232
2009-07-17 20:47:02 +00:00
38264b1554
"LLVMContext* " --> "LLVMContext *"
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llvm-svn: 74878
2009-07-06 23:00:19 +00:00
f1f1743b2e
Finish LLVMContext-ing lib/Analysis. This required pushing LLVMContext's through the ValueTracking API.
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llvm-svn: 74873
2009-07-06 22:37:39 +00:00
edb8407f0c
do not try to analyze bitcasts from i64 to <2 x i32> in ComputedMaskedBits. While
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we could do this, doing so requires adjusting the demanded mask and the code isn't
doing that yet. This fixes PR4495
llvm-svn: 74699
2009-07-02 16:04:08 +00:00
2636693a3c
Fix llvm::ComputeNumSignBits to handle pointer types
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conservatively correctly, instead of aborting.
llvm-svn: 73908
2009-06-22 22:02:32 +00:00
7ccc52f131
Support vector casts in more places, fixing a variety of assertion
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failures.
To support this, add some utility functions to Type to help support
vector/scalar-independent code. Change ConstantInt::get and
ConstantFP::get to support vector types, and add an overload to
ConstantInt::get that uses a static IntegerType type, for
convenience.
Introduce a new getConstant method for ScalarEvolution, to simplify
common use cases.
llvm-svn: 73431
2009-06-15 22:12:54 +00:00
a5b9645c4b
Split the Add, Sub, and Mul instruction opcodes into separate
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integer and floating-point opcodes, introducing
FAdd, FSub, and FMul.
For now, the AsmParser, BitcodeReader, and IRBuilder all preserve
backwards compatability, and the Core LLVM APIs preserve backwards
compatibility for IR producers. Most front-ends won't need to change
immediately.
This implements the first step of the plan outlined here:
http://nondot.org/sabre/LLVMNotes/IntegerOverflow.txt
llvm-svn: 72897
2009-06-04 22:49:04 +00:00
071156c19c
When the low bits of one operand of an add are zero, that number
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of low bits of the other operand are preserved in the output.
llvm-svn: 72365
2009-05-24 18:02:35 +00:00
bf0002e7c1
Teach ValueTracking a new way to analyze PHI nodes, and and teach
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Instcombine to be more aggressive about using SimplifyDemandedBits
on shift nodes. This allows a shift to be simplified to zero in the
included test case.
llvm-svn: 72204
2009-05-21 02:28:33 +00:00
af9eaa830a
Rename PaddedSize to AllocSize, in the hope that this
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will make it more obvious what it represents, and stop
it being confused with the StoreSize.
llvm-svn: 71349
2009-05-09 07:06:46 +00:00
fa54bc2052
Oops...I committed too much.
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llvm-svn: 66867
2009-03-13 04:39:26 +00:00
b02eadf660
Temporarily XFAIL this test.
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llvm-svn: 66866
2009-03-13 04:37:11 +00:00
4f356bb9b0
Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple
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ashr instcombine to help expose this code. And apply the fix to
SelectionDAG's copy of this code too.
llvm-svn: 65364
2009-02-24 02:00:40 +00:00
4612ae1f8e
Eliminate use of uint32_t to improve compatibility with cygwin
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llvm-svn: 62590
2009-01-20 18:22:57 +00:00
dc020f9c3c
Rename getABITypeSize to getTypePaddedSize, as
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suggested by Chris.
llvm-svn: 62099
2009-01-12 20:38:59 +00:00
f3e696bc5a
ValueTracker can't assume that an alloca with no specified alignment
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will get its preferred alignment. It has to be careful and cautiously assume
it will just get the ABI alignment. This prevents instcombine from rounding
up the alignment of a load/store without adjusting the alignment of the alloca.
llvm-svn: 61934
2009-01-08 19:28:38 +00:00
aebd9e01d7
Re-apply 55137 with fixes.
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llvm-svn: 58296
2008-10-27 23:24:03 +00:00
29cc3aa27d
Temporarily reverting r55137. This was causing the bootstrap to go into an
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infinite loop.
llvm-svn: 55149
2008-08-21 22:40:10 +00:00
0d191fd8d1
Fix ComputeMaskedBits to handle phis correctly. We need to take the
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minimum of the known zeros.
llvm-svn: 55137
2008-08-21 20:45:12 +00:00
6134fbccef
Fix a bogus srem rule - a negative value srem'd by a power-of-2
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can have a non-negative result; for example, -16%16 is 0. Also,
clarify the related comments. This fixes PR2670.
llvm-svn: 54767
2008-08-13 23:12:35 +00:00
b85cc9db19
Don't use ++idx_begin when I actually mean idx_begin + 1, especially since we
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also use *idx_begin in the same expression, giving unpredictable results.
This fixes this bug: http://lists.cs.uiuc.edu/pipermail/llvmdev/2008-July/015877.html
llvm-svn: 53670
2008-07-16 10:47:35 +00:00
da3db11db3
- Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag.
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- Correctly handle memcpy from constant string which is zero-initialized.
llvm-svn: 52891
2008-06-30 07:31:25 +00:00
a7c583d584
Revert (52748 and friends):
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Move GetConstantStringInfo to lib/Analysis. Remove
string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.
This unbreaks llvm-gcc bootstrap.
llvm-svn: 52884
2008-06-29 17:57:03 +00:00
1701328675
Add back the capability to include nul characters in strings with
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GetConstantStringInfo. This will hopefully restore llvm-gcc to
happy bootstrap land.
llvm-svn: 52851
2008-06-28 05:33:32 +00:00
ebf1f67193
Tighten up checking.
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llvm-svn: 52850
2008-06-28 04:37:04 +00:00
dc3f946137
fix the regressions from Eric's patch by making GetConstantStringInfo
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tolerate a non-nul-terminated string, and handling a direct global
reference.
llvm-svn: 52813
2008-06-27 03:36:51 +00:00
db0a48b1a7
Reserve the size we'll need in advance.
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llvm-svn: 52763
2008-06-26 04:47:41 +00:00
d0ab9c47e6
Move GetConstantStringInfo to lib/Analysis. Remove
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string output routine from Constant. Update all
callers. Change debug intrinsic api slightly to
accomodate move of routine, these now return values
instead of strings.
llvm-svn: 52748
2008-06-26 00:31:12 +00:00
db356eea26
Fix some warnings reported by gcc-4.3. Hopefully
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this still compiles on windows - I can't test!
llvm-svn: 52488
2008-06-19 08:47:31 +00:00
8369c67cbd
Use a SmallVector instead of an array, since auto_ptr doesn't handle arrays
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properly.
llvm-svn: 52390
2008-06-17 08:24:37 +00:00
fa4d0b883a
Make BuildSubAggregate use FindInsertedElement again to prevent it from
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inserting extractvalues. In particular, this prevents the insertion of
extractvalues that can't be folded away later. Also add an example of when this
stuff is needed.
llvm-svn: 52328
2008-06-16 14:13:46 +00:00
69801d4fd1
Make the InsertBefore argument to FindInsertedValue optional, so you can find an inserted value without modifying the code.
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llvm-svn: 52319
2008-06-16 13:28:31 +00:00
86cda9e050
Pass around Instruction* instead of Instruction& in FindInsertedValue and friends.
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llvm-svn: 52318
2008-06-16 13:13:08 +00:00
5cb387735d
80 column fixes.
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llvm-svn: 52316
2008-06-16 12:57:37 +00:00
e92e18be5a
Move FindScalarValue from InstructionCombining.cpp to ValueTracking.cpp. While
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I'm at it, rename it to FindInsertedValue.
The only functional change is that newly created instructions are no longer
added to instcombine's worklist, but that is not really necessary anyway (and
I'll commit some improvements next that will completely remove the need).
llvm-svn: 52315
2008-06-16 12:48:21 +00:00
6449690da4
Add #includes required by GCC 4.3, thanks for Zhongxing Xu
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for reporting this.
llvm-svn: 51926
2008-06-04 04:46:14 +00:00
2e01a69e72
Remove unneeded code I added.
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llvm-svn: 51878
2008-06-02 18:39:07 +00:00
a12a6de683
move CannotBeNegativeZero to ValueTracking. Simplify some signbit comparisons.
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llvm-svn: 51864
2008-06-02 01:29:46 +00:00
965c769b3c
move ComputeMaskedBits, MaskedValueIsZero, and ComputeNumSignBits
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out of instcombine into a new file in libanalysis. This also teaches
ComputeNumSignBits about the number of sign bits in a constantint.
llvm-svn: 51863
2008-06-02 01:18:21 +00:00
Chris Lattner