Sanjoy Das 7ebbc8de2f Fix bug 22641 ...

The bug was a result of getPreStartForExtend interpreting nsw/nuw
flags on an add recurrence more strongly than is legal.  {S,+,X}<nsw>
implies S+X is nsw only if the backedge of the loop is taken at least
once.

Differential Revision: http://reviews.llvm.org/D7808



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230275 91177308-0d34-0410-b5e6-96231b3b80d8

2015-02-23 22:55:13 +00:00

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AArch64

IR: Make metadata typeless in assembly

2014-12-15 19:07:53 +00:00

ARM

[ARM] Re-re-apply VLD1/VST1 base-update combine.

2015-02-19 23:52:41 +00:00

X86

[X86] Reduce some 32-bit imuls into lea + shl

2015-01-28 14:08:22 +00:00

2005-08-15-AddRecIV.ll

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2005-08-17-OutOfLoopVariant.ll

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2005-09-12-UsesOutOutsideOfLoop.ll

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2007-04-23-UseIterator.ll

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2008-08-13-CmpStride.ll

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2008-09-09-Overflow.ll

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2009-01-13-nonconstant-stride-outside-loop.ll

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2009-04-28-no-reduce-mul.ll

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2011-07-19-CritEdgeBreakCrash.ll

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2011-10-03-CritEdgeMerge.ll

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2011-10-06-ReusePhi.ll

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2011-10-13-SCEVChain.ll

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2011-10-14-IntPtr.ll

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2011-12-19-PostincQuadratic.ll

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2012-01-02-nopreheader.ll

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2012-01-16-nopreheader.ll

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2012-03-15-nopreheader.ll

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2012-03-26-constexpr.ll

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2012-07-13-ExpandUDiv.ll

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2012-07-18-LimitReassociate.ll

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2013-01-05-IndBr.ll

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2013-01-14-ReuseCast.ll

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addrec-gep-address-space.ll

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addrec-gep.ll

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address-space-loop.ll

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count-to-zero.ll

Fix bug 22641

2015-02-23 22:55:13 +00:00

dead-phi.ll

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different-type-ivs.ll

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dominate-assert.ll

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dont_insert_redundant_ops.ll

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dont_reduce_bytes.ll

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dont_reverse.ll

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dont-hoist-simple-loop-constants.ll

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exit_compare_live_range.ll

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hoist-parent-preheader.ll

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invariant_value_first_arg.ll

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invariant_value_first.ll

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ivchain.ll

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lsr-expand-quadratic.ll

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nested-reduce.ll

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nonlinear-postinc.ll

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ops_after_indvar.ll

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phi_node_update_multiple_preds.ll

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post-inc-icmpzero.ll

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pr2537.ll

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pr2570.ll

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pr3086.ll

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pr3399.ll

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pr3571.ll

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pr12018.ll

IR: Make metadata typeless in assembly

2014-12-15 19:07:53 +00:00

pr12048.ll

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pr12691.ll

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pr18165.ll

IR: Make metadata typeless in assembly

2014-12-15 19:07:53 +00:00

preserve-gep-loop-variant.ll

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quadradic-exit-value.ll

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related_indvars.ll

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remove_indvar.ll

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scaling_factor_cost_crash.ll

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share_code_in_preheader.ll

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share_ivs.ll

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uglygep-address-space.ll

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uglygep.ll

Fix bug 22641

2015-02-23 22:55:13 +00:00

use_postinc_value_outside_loop.ll

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var_stride_used_by_compare.ll

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variable_stride.ll

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