Dan Gohman 61ffa8e373 Instcombine's ShrinkDemandedConstant may strip bits out of constants, ...

obscuring what would otherwise be a low-bits mask.  Use ComputeMaskedBits
to compute what ShrinkDemandedConstant knew about to reconstruct a
low-bits mask value.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73540 91177308-0d34-0410-b5e6-96231b3b80d8

2009-06-16 19:52:01 +00:00

..

2002-09-09-PointerIndVar.ll

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2003-04-16-ExprAnalysis.ll

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2003-09-12-MultiplePred.ll

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2003-09-23-NotAtTop.ll

Teach SCEVExpander's visitAddRecExpr to reuse an existing canonical

2009-06-13 16:25:49 +00:00

2003-12-10-IndVarDeadCode.ll

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2003-12-10-RemoveInstrCrash.ll

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2003-12-15-Crash.ll

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2003-12-21-IndVarSize.ll

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2004-03-10-PHIInsertionBug.ll

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2004-04-05-InvokeCastCrash.ll

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2004-04-07-ScalarEvolutionCrash.ll

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2005-02-11-InvokeCrash.ll

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2005-02-17-TruncateExprCrash.ll

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2005-02-26-ExitValueCompute.ll

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2005-06-15-InstMoveCrash.ll

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2005-11-18-Crash.ll

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2006-03-31-NegativeStride.ll

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2006-06-16-Indvar-LCSSA-Crash.ll

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2006-09-20-LFTR-Crash.ll

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2006-12-10-BitCast.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

2007-01-06-TripCount.ll

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2007-01-08-X86-64-Pointer.ll

Add nounwind to a few tests.

2009-05-18 15:16:49 +00:00

2007-06-06-DeleteDanglesPtr.ll

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2007-11-23-BitcastCrash.ll

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2008-06-15-SCEVExpanderBug.ll

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2008-09-02-IVType.ll

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2008-10-03-CouldNotCompute.ll

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2008-11-03-Floating.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

2008-11-17-Floating.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

2008-11-25-APFloatAssert.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

2009-04-14-shorten_iv_vars.ll

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2009-04-15-shorten-iv-vars-2.ll

Factor the code for collecting IV users out of LSR into an IVUsers class,

2009-05-12 02:17:14 +00:00

2009-04-22-IndvarCrash.ll

Make sure both operands have binary instructions have the same type.

2009-04-22 23:39:28 +00:00

2009-04-27-Floating.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

2009-05-24-useafterfree.ll

The rewriter may hold references to instructions that are deleted because they are trivially dead.

2009-05-24 14:23:16 +00:00

ada-loops.ll

Factor the code for collecting IV users out of LSR into an IVUsers class,

2009-05-12 02:17:14 +00:00

addrec-gep.ll

Generalize SCEVExpander::visitAddRecExpr's GEP persuit, and avoid

2009-05-24 18:06:31 +00:00

avoid-i0.ll

Handle ands with ~0 correctly too. This fixes PR4052.

2009-04-27 01:41:10 +00:00

casted-argument.ll

Fix an error in this test.

2009-04-23 15:22:28 +00:00

complex-scev.ll

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dg.exp

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divide-pointer.ll

In cases where a pointer value is an operand of a multiplication or

2009-05-26 17:41:16 +00:00

exit_value_tests.ll

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gep-with-mul-base.ll

Generalize SCEVExpander::visitAddRecExpr's GEP persuit, and avoid

2009-05-24 18:06:31 +00:00

interesting-invoke-use.ll

Teach IndVarSimplify's FixUsesBeforeDefs to handle InvokeInsts by

2009-05-22 16:47:11 +00:00

iterationCount_zext_or_trunc.ll

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iv-zext.ll

Split the Add, Sub, and Mul instruction opcodes into separate

2009-06-04 22:49:04 +00:00

lftr_simple.ll

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lftr-other-uses.ll

When rewriting the loop exit test with the canonical induction variable,

2009-05-24 19:11:38 +00:00

loop_evaluate_1.ll

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loop_evaluate_2.ll

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loop_evaluate_3.ll

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loop_evaluate_4.ll

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loop_evaluate_5.ll

When forgetting SCEVs for loop PHIs, don't forget SCEVUnknown values.

2009-05-12 01:27:58 +00:00

loop_evaluate_6.ll

Factor the code for collecting IV users out of LSR into an IVUsers class,

2009-05-12 02:17:14 +00:00

masked-iv.ll

Teach SCEVExpander's visitAddRecExpr to reuse an existing canonical

2009-06-13 16:25:49 +00:00

pointer-indvars.ll

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pointer.ll

Implement more aggressive folding of add operand lists when

2009-06-14 22:58:51 +00:00

preserve-gep-remainder.ll

Teach SCEVExpander to avoid creating over-indexed GEP indices when

2009-05-27 02:00:53 +00:00

preserve-gep.ll

Teach SCEVExpander to expand arithmetic involving pointers into GEP

2009-05-19 02:15:55 +00:00

preserve-signed-wrap.ll

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promote-iv-to-eliminate-casts.ll

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shrunk-constant.ll

Instcombine's ShrinkDemandedConstant may strip bits out of constants,

2009-06-16 19:52:01 +00:00

signed-trip-count.ll

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subtract.ll

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tripcount_compute.ll

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tripcount_infinite.ll

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variable-stride-ivs-0.ll

Don't attempt to simplify an non-affine IV expression if it can't

2009-06-03 19:11:31 +00:00

variable-stride-ivs-1.ll

Don't attempt to simplify an non-affine IV expression if it can't

2009-06-03 19:11:31 +00:00