Chris Lattner faf815b938 Handle forwarding local memsets to loads. For example, we optimize this: ...

short x(short *A) {
  memset(A, 1, sizeof(*A)*100);
  return A[42];
}

to 'return 257' instead of doing the load.  



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90695 91177308-0d34-0410-b5e6-96231b3b80d8

2009-12-06 01:57:02 +00:00

..

ABCD

Revert my previous patch to ABCD and fix things the right way. There are two problems addressed

2009-11-09 00:44:44 +00:00

ADCE

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ArgumentPromotion

Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test

2009-11-03 15:29:06 +00:00

BlockPlacement

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BranchFolding

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CodeExtractor

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CodeGenPrepare

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ConstantMerge

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ConstProp

Fix PR5551 by not ignoring the top level constantexpr when

2009-12-04 06:29:29 +00:00

DeadArgElim

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DeadStoreElimination

Cleanup/remove some parts of the lifetime region handling code in memdep and GVN,

2009-12-02 07:35:19 +00:00

FunctionAttrs

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GlobalDCE

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GlobalOpt

Make ConstantFoldConstantExpression recursively visit the entire

2009-11-23 16:22:21 +00:00

GVN

Handle forwarding local memsets to loads. For example, we optimize this:

2009-12-06 01:57:02 +00:00

IndVarSimplify

Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test

2009-11-03 15:29:06 +00:00

Inline

implement a nice little efficiency hack in the inliner. Since we're now

2009-11-12 07:56:08 +00:00

InstCombine

Generalize this optimization to work on equality comparisons between any two

2009-12-05 05:00:00 +00:00

Internalize

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IPConstantProp

Fix a use of an invalidated iterator in the case where there are multiple

2009-11-23 16:13:39 +00:00

JumpThreading

fix PR5640 by tracking whether a block is the header of a loop more

2009-12-01 06:04:43 +00:00

LCSSA

Trim a bunch of unneeded code from this testcase.

2009-11-10 01:33:08 +00:00

LICM

Enable hoisting of loads from constant memory by default. In cases where

2009-11-19 19:00:10 +00:00

LoopDeletion

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LoopIndexSplit

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LoopRotate

Make Loop::getLoopLatch() work on loops which don't have preheaders, as

2009-11-20 20:51:18 +00:00

LoopSimplify

Make Loop::getLoopLatch() work on loops which don't have preheaders, as

2009-11-20 20:51:18 +00:00

LoopStrengthReduce

Generalize OptimizeLoopTermCond to optimize more loop terminating icmp to use postinc iv.

2009-11-17 18:10:11 +00:00

LoopUnroll

Teach getSmallConstantTripMultiple about Shl operators.

2009-11-20 01:09:34 +00:00

LoopUnswitch

Reverting patch in revision 89758, initial attempt at fixing PR5373 has proven to be bogus.

2009-11-25 05:38:41 +00:00

LowerInvoke

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LowerSetJmp

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LowerSwitch

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Mem2Reg

fix a bug exposed by moving SRoA earlier which caused a crash building kc++

2009-11-02 04:37:17 +00:00

MemCpyOpt

Make opt default to not adding a target data string and update tests that depend on target data to supply it within the test

2009-11-03 15:29:06 +00:00

MergeFunc

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PruneEH

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Reassociate

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ScalarRepl

fix PR5436 by making the 'simple' case of SRoA not promote out of range

2009-11-27 16:37:41 +00:00

SCCP

fix a crash in SCCP handling extractvalue of an array, pointed out and

2009-11-10 22:02:09 +00:00

SimplifyCFG

Optimize test more.

2009-11-10 21:02:18 +00:00

SimplifyLibCalls

Teach SimplifyLibCalls to fold memcmp calls with constant arguments.

2009-11-05 17:44:22 +00:00

SRETPromotion

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SSI

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StripSymbols

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TailCallElim

Improve tail call elimination to handle the switch statement.

2009-11-07 21:10:15 +00:00

TailDup

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