Chris Lattner 3523993451 reuse negates where possible instead of always creating them from scratch. ...

This allows us to optimize test12 into:

define i32 @test12(i32 %X) {
  %factor = mul i32 %X, -3                        ; <i32> [#uses=1]
  %Z = add i32 %factor, 6                         ; <i32> [#uses=1]
  ret i32 %Z
}

instead of:

define i32 @test12(i32 %X) {
  %Y = sub i32 6, %X                              ; <i32> [#uses=1]
  %C = sub i32 %Y, %X                             ; <i32> [#uses=1]
  %Z = sub i32 %C, %X                             ; <i32> [#uses=1]
  ret i32 %Z
}



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92373 91177308-0d34-0410-b5e6-96231b3b80d8

2009-12-31 20:34:32 +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

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

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

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

BranchFolding

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

CodeExtractor

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

CodeGenPrepare

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

ConstantMerge

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

ConstProp

Fix PR5551 by not ignoring the top level constantexpr when

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

DeadArgElim

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

DeadStoreElimination

Fix some CHECK lines which were ignored by accident.

2009-12-12 09:25:50 +00:00

FunctionAttrs

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

GlobalDCE

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

GlobalOpt

fix two bogus tests that the asmparser now rejects.

2009-12-30 05:54:51 +00:00

GVN

fix an overly conservative caching issue that caused memdep to

2009-12-19 21:29:22 +00:00

IndVarSimplify

Make getUniqueExitBlocks's precondition assert more precise, to

2009-12-11 20:05:23 +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

add check lines for min/max tests.

2009-12-21 06:08:50 +00:00

Internalize

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

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 PR5698

2009-12-06 17:17:23 +00:00

LCSSA

Trim a bunch of unneeded code from this testcase.

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

LICM

Add radar fixed in comment.

2009-12-14 19:07:25 +00:00

LoopDeletion

Make LoopDeletion check the maximum backedge taken count, rather than the

2009-10-23 17:10:01 +00:00

LoopIndexSplit

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

LoopRotate

fix PR5837 by having SSAUpdate reuse phi nodes for the

2009-12-21 07:16:11 +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

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

LowerSetJmp

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

LowerSwitch

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

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

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

PruneEH

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

Reassociate

reuse negates where possible instead of always creating them from scratch.

2009-12-31 20:34:32 +00:00

ScalarRepl

Generalize SROA to allow the first index of a GEP to be non-zero. Add a

2009-12-22 06:57:14 +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

fix two bogus tests that the asmparser now rejects.

2009-12-30 05:54:51 +00:00

SimplifyLibCalls

move an optimization for memcmp out of simplifylibcalls and into

2009-12-24 00:37:38 +00:00

SRETPromotion

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

SSI

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00

StripSymbols

Update test.

2009-09-09 02:41:50 +00:00

TailCallElim

Improve tail call elimination to handle the switch statement.

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

TailDup

Change tests from "opt %s" to "opt < %s" so that opt doesn't see the

2009-09-11 18:01:28 +00:00