Andrew Trick 2fabd464ae indvars -disable-iv-rewrite: Adds support for eliminating identity ...

ops.

This is a rewrite of the IV simplification algorithm used by
-disable-iv-rewrite. To avoid perturbing the default mode, I
temporarily split the driver and created SimplifyIVUsersNoRewrite. The
idea is to avoid doing opcode/pattern matching inside
IndVarSimplify. SCEV already does it. We want to optimize with the
full generality of SCEV, but optimize def-use chains top down on-demand rather
than rewriting the entire expression bottom-up. This was easy to do
for operations that SCEV can prove are identity function. So we're now
eliminating bitmasks and zero extends this way.

A result of this rewrite is that indvars -disable-iv-rewrite no longer
requires IVUsers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133502 91177308-0d34-0410-b5e6-96231b3b80d8

2011-06-21 03:22:38 +00:00

..

ADCE

stop accepting begin/end around function bodies in the .ll parser, this isn't pascal anymore.

2011-06-17 06:42:57 +00:00

ArgumentPromotion

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BlockPlacement

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BranchFolding

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CodeExtractor

manually upgrade a bunch of tests to modern syntax, and remove some that

2011-06-17 03:14:27 +00:00

CodeGenPrepare

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ConstantMerge

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ConstProp

implement PR9315, constant folding exp2 in terms of pow (since hosts without

2011-05-22 22:22:35 +00:00

CorrelatedValuePropagation

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DeadArgElim

manually upgrade a bunch of tests to modern syntax, and remove some that

2011-06-17 03:14:27 +00:00

DeadStoreElimination

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

EarlyCSE

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FunctionAttrs

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

GlobalDCE

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GlobalOpt

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

GVN

This is an automatically reduced test case that crashed in GVN, at some

2011-06-20 14:46:47 +00:00

IndVarSimplify

indvars -disable-iv-rewrite: Adds support for eliminating identity

2011-06-21 03:22:38 +00:00

Inline

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

InstCombine

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

InstSimplify

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Internalize

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IPConstantProp

remove parser support for the obsolete "multiple return values" syntax, which

2011-06-17 06:49:41 +00:00

JumpThreading

remove asmparser support for the old getresult instruction, which has been subsumed by extractvalue.

2011-06-17 06:57:15 +00:00

LCSSA

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LICM

manually upgrade a bunch of tests to modern syntax, and remove some that

2011-06-17 03:14:27 +00:00

LoopDeletion

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LoopIdiom

Fix PR9815: I was trying to get out of "generating code and then

2011-05-22 17:39:56 +00:00

LoopRotate

remove asmparser support for the old getresult instruction, which has been subsumed by extractvalue.

2011-06-17 06:57:15 +00:00

LoopSimplify

manually upgrade a bunch of tests to modern syntax, and remove some that

2011-06-17 03:14:27 +00:00

LoopStrengthReduce

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LoopUnroll

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LoopUnswitch

Bail on unswitching a switch statement for a case with a critical edge. We name

2011-06-03 06:27:15 +00:00

LowerAtomic

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LowerInvoke

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LowerSetJmp

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LowerSwitch

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Mem2Reg

Add test for r133251.

2011-06-18 07:23:25 +00:00

MemCpyOpt

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

MergeFunc

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ObjCARC

Fix ARCOpt to insert releases on both successors of an invoke rather

2011-06-16 20:57:14 +00:00

PhaseOrdering

This directory was missing the dg.exp to cause the tests to run. Some time since

2011-06-06 20:23:00 +00:00

PruneEH

manually upgrade a bunch of tests to modern syntax, and remove some that

2011-06-17 03:14:27 +00:00

Reassociate

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ScalarRepl

Remove support for parsing the "type i32" syntax for defining a numbered

2011-06-19 00:03:46 +00:00

SCCP

remove asmparser support for the old getresult instruction, which has been subsumed by extractvalue.

2011-06-17 06:57:15 +00:00

SimplifyCFG

Fix PR10103: Less code for enum type translation.

2011-06-18 10:28:47 +00:00

SimplifyLibCalls

rip out a ton of intrinsic modernization logic from AutoUpgrade.cpp, which is

2011-06-18 06:05:24 +00:00

Sink

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StripSymbols

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TailCallElim

make the asmparser reject function and type redefinitions. 'Merging' hasn't been

2011-06-17 07:06:44 +00:00

TailDup

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