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66 Commits

Author SHA1 Message Date
Chris Lattner
f825d5d176 implement a FIXME: limit the depth that DecomposeGEPExpression goes the same 
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
Chris Lattner
e7056c8cde limit the recursion depth of GetLinearExpression. This 
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
Chris Lattner
ce573daf09 Implement PR1143 (at -m64) by making basicaa look through extensions. We 
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
Chris Lattner
a403a7eddc fix two transposed lines duncan caught and add an explanatory comment. 
llvm-svn: 89958
 2009-11-26 18:35:46 +00:00
Chris Lattner
f7a0da351e this todo is resolved. 
llvm-svn: 89957
 2009-11-26 17:14:10 +00:00
Chris Lattner
2178a80b90 move DecomposeGEPExpression out into ValueTracking.cpp 
llvm-svn: 89956
 2009-11-26 17:12:50 +00:00
Chris Lattner
9646ffc9a2 remove some redundant braces 
llvm-svn: 89912
 2009-11-26 01:50:12 +00:00
Nick Lewycky
8cbd0c3156 Remove unused LLVMContext. 
llvm-svn: 89642
 2009-11-23 03:29:18 +00:00
Dan Gohman
f3ab031fde Simplify ComputeMultiple so that it doesn't depend on TargetData. 
llvm-svn: 89175
 2009-11-18 00:58:27 +00:00
Victor Hernandez
89c04dbe2f Add ComputeMultiple() analysis function that recursively determines if a Value V is a multiple of unsigned Base 
llvm-svn: 86675
 2009-11-10 08:28:35 +00:00
Victor Hernandez
8428eb5720 Remove AllocationInst. Since MallocInst went away, AllocaInst is the only subclass of AllocationInst, so it no longer is necessary. 
llvm-svn: 84969
 2009-10-23 21:09:37 +00:00
Victor Hernandez
a25a2890fa Remove MallocInst from LLVM Instructions. 
llvm-svn: 84299
 2009-10-17 01:18:07 +00:00
Dale Johannesen
53c365d807 Handle sqrt in CannotBeNegativeZero. absf and absl 
appear to be misspellings, removed in favor of fabs*.

llvm-svn: 82796
 2009-09-25 20:54:50 +00:00
Dan Gohman
78b99e3761 Teach ValueTracking how to look through GlobalAliases. GlobalAliases are 
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
Chris Lattner
37dbbde91b fix ComputeMaskedBits handling of zext/sext/trunc to work with vectors. 
This fixes PR4905

llvm-svn: 81174
 2009-09-08 00:13:52 +00:00
Chris Lattner
1247f36e13 add some comments to describe the invariants. 
llvm-svn: 81173
 2009-09-08 00:06:16 +00:00
Torok Edwin
31cf28eefd Fix DbgStopPointInst->getFileName/getDirectory, broken by the MDNodification in 
r80406, and readd a -print-dbginfo test.

llvm-svn: 80778
 2009-09-02 11:13:56 +00:00
Dan Gohman
d3d03c966f Handle TargetData with const. 
llvm-svn: 80262
 2009-08-27 17:51:25 +00:00
Dan Gohman
ba656de4a4 Use hasDefinitiveInitializer() instead of testing the same thing 
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
Dan Gohman
807652ac3a Fix SimplifyLibcalls and ValueTracking to check mayBeOverridden 
before performing optimizations based on constant string values.

llvm-svn: 79384
 2009-08-19 00:11:12 +00:00
Owen Anderson
9df206d02d Push LLVMContexts through the IntegerType APIs. 
llvm-svn: 78948
 2009-08-13 21:58:54 +00:00
Dan Gohman
08e747855c Don't assume that external global variables are aligned at their preferred 
alignment. Only the minimum alignment guaranteed by the ABI may be assumed.

llvm-svn: 78668
 2009-08-11 15:50:03 +00:00
Dan Gohman
1c41d60c4a Fix a bunch of namespace pollution. 
llvm-svn: 78363
 2009-08-07 01:32:21 +00:00
Owen Anderson
1dc40e205b Move a few more APIs back to 2.5 forms. The only remaining ones left to change back are 
metadata related, which I'm waiting on to avoid conflicting with Devang.

llvm-svn: 77721
 2009-07-31 20:28:14 +00:00
Owen Anderson
93ccaf5c60 Move more code back to 2.5 APIs. 
llvm-svn: 77635
 2009-07-30 23:03:37 +00:00
Daniel Dunbar
64abfd0337 Remove Value::getNameLen 
llvm-svn: 77148
 2009-07-26 08:34:35 +00:00
Owen Anderson
cc287b28c9 Get rid of the Pass+Context magic. 
llvm-svn: 76702
 2009-07-22 00:24:57 +00:00
Dan Gohman
25a722cc45 Add a new Operator class, for handling Instructions and ConstantExprs 
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
Owen Anderson
121f736d9c "LLVMContext* " --> "LLVMContext *" 
llvm-svn: 74878
 2009-07-06 23:00:19 +00:00
Owen Anderson
5f268720e9 Finish LLVMContext-ing lib/Analysis. This required pushing LLVMContext's through the ValueTracking API. 
llvm-svn: 74873
 2009-07-06 22:37:39 +00:00
Chris Lattner
54c0359890 do not try to analyze bitcasts from i64 to <2 x i32> in ComputedMaskedBits. While 
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
Dan Gohman
b85ac02513 Fix llvm::ComputeNumSignBits to handle pointer types 
conservatively correctly, instead of aborting.

llvm-svn: 73908
 2009-06-22 22:02:32 +00:00
Dan Gohman
2e737ac21f Support vector casts in more places, fixing a variety of assertion 
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
Dan Gohman
5f6f8101d5 Split the Add, Sub, and Mul instruction opcodes into separate 
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
Dan Gohman
378152d9d0 When the low bits of one operand of an add are zero, that number 
of low bits of the other operand are preserved in the output.

llvm-svn: 72365
 2009-05-24 18:02:35 +00:00
Dan Gohman
fc28858d91 Teach ValueTracking a new way to analyze PHI nodes, and and teach 
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
Duncan Sands
f7af13b2d4 Rename PaddedSize to AllocSize, in the hope that this 
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
Bill Wendling
5499163a0a Oops...I committed too much. 
llvm-svn: 66867
 2009-03-13 04:39:26 +00:00
Bill Wendling
02a239b837 Temporarily XFAIL this test. 
llvm-svn: 66866
 2009-03-13 04:37:11 +00:00
Dan Gohman
1197d46ccf Fix a ValueTracking rule: RHS means operand 1, not 0. Add a simple 
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
Chris Lattner
391f04d56e Eliminate use of uint32_t to improve compatibility with cygwin 
llvm-svn: 62590
 2009-01-20 18:22:57 +00:00
Duncan Sands
bcdbfb63dc Rename getABITypeSize to getTypePaddedSize, as 
suggested by Chris.

llvm-svn: 62099
 2009-01-12 20:38:59 +00:00
Chris Lattner
5a8a2b046d ValueTracker can't assume that an alloca with no specified alignment 
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
David Greene
48e4fdef50 Re-apply 55137 with fixes. 
llvm-svn: 58296
 2008-10-27 23:24:03 +00:00
Bill Wendling
7840023704 Temporarily reverting r55137. This was causing the bootstrap to go into an 
infinite loop.

llvm-svn: 55149
 2008-08-21 22:40:10 +00:00
David Greene
e14ab14892 Fix ComputeMaskedBits to handle phis correctly. We need to take the 
minimum of the known zeros.

llvm-svn: 55137
 2008-08-21 20:45:12 +00:00
Dan Gohman
db5b503d60 Fix a bogus srem rule - a negative value srem'd by a power-of-2 
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
Matthijs Kooijman
96d9bcbdf6 Don't use ++idx_begin when I actually mean idx_begin + 1, especially since we 
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
Evan Cheng
2005804de6 - Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag. 
- Correctly handle memcpy from constant string which is zero-initialized.

llvm-svn: 52891
 2008-06-30 07:31:25 +00:00
Anton Korobeynikov
6f260767ec Revert (52748 and friends): 
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