Benjamin Kramer 37fa1c81ac InstCombine: Fix infinite loop when encountering switch on trivial icmp. ...

The test case feeds the following into InstCombine's visitSelect:
%tobool8 = icmp ne i32 0, 0
%phitmp = select i1 %tobool8, i32 3, i32 0
Then instcombine replaces the right side of the switch with 0, doesn't notice
that nothing changes and tries again indefinitely.

This fixes PR12897.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157587 91177308-0d34-0410-b5e6-96231b3b80d8

2012-05-28 19:18:16 +00:00

..

ADCE

…

ArgumentPromotion

…

BBVectorize

Don't vectorize target-specific types (ppc_fp128, x86_fp80, etc.).

2012-04-27 19:34:00 +00:00

BlockPlacement

…

BoundsChecking

bounds checking: add support for byval arguments

2012-05-25 21:15:17 +00:00

BranchFolding

…

CodeExtractor

…

CodeGenPrepare

…

ConstantMerge

…

ConstProp

…

CorrelatedValuePropagation

allow LazyValueInfo::getEdgeValue() to reason about multiple edges from the same switch instruction by doing union of ranges (which may still be conservative, but it's more aggressive than before)

2012-05-18 21:02:10 +00:00

DeadArgElim

…

DeadStoreElimination

Teach DeadStoreElimination to eliminate exit-block stores with phi addresses.

2012-05-10 18:57:38 +00:00

EarlyCSE

…

FunctionAttrs

…

GlobalDCE

…

GlobalOpt

Teach Function::hasAddressTaken that BlockAddress doesn't really take

2012-05-12 08:30:16 +00:00

GVN

Fix PR12858, a crash due to GVN's PRE not fully removing an instruction from the

2012-05-22 14:17:53 +00:00

IndVarSimplify

…

Inline

Fix the inliner so that the optsize function attribute don't alter the

2012-05-23 13:42:57 +00:00

InstCombine

InstCombine: Fix infinite loop when encountering switch on trivial icmp.

2012-05-28 19:18:16 +00:00

InstSimplify

…

Internalize

…

IPConstantProp

…

JumpThreading

formatting change: strip debug info from test

2012-05-10 16:55:31 +00:00

LCSSA

…

LICM

An instruction in a loop is not guaranteed to be executed just because the loop

2012-05-01 04:03:01 +00:00

LoopDeletion

…

LoopIdiom

…

LoopRotate

Fix ValueTracking to conclude that debug intrinsics are safe to

2012-04-07 19:22:18 +00:00

LoopSimplify

…

LoopStrengthReduce

LSR fix: add a missing phi check during IV hoisting.

2012-05-22 17:39:59 +00:00

LoopUnroll

Fix 12513: Loop unrolling breaks with indirect branches.

2012-04-10 05:14:42 +00:00

LoopUnswitch

Do not pass an invalid domtree to SimplifyInstruction from

2012-05-20 01:32:09 +00:00

LowerAtomic

…

LowerExpectIntrinsic

…

LowerInvoke

…

LowerSwitch

PR1255 related changes (case ranges):

2012-05-24 09:33:20 +00:00

Mem2Reg

…

MemCpyOpt

Move the capture analysis from MemoryDependencyAnalysis to a more general place

2012-05-14 20:35:04 +00:00

MergeFunc

…

ObjCARC

Fix replacing all the users of objc weak runtime routines

2012-05-18 22:17:29 +00:00

PhaseOrdering

Reapply r155136 after fixing PR12599.

2012-04-23 17:39:52 +00:00

PruneEH

…

Reassociate

Since commit 157467, if reassociate isn't actually going to change an expression

2012-05-26 16:42:52 +00:00

ScalarRepl

Do not eliminate allocas whose alignment exceeds that of the

2012-05-19 22:52:10 +00:00

SCCP

Reapply r155682, making constant folding more consistent, with a fix to work

2012-04-27 17:50:22 +00:00

SimplifyCFG

…

SimplifyLibCalls

revert my previous patches that introduced an additional parameter to the objectsize intrinsic.

2012-05-22 15:25:31 +00:00

Sink

…

StripSymbols

…

TailCallElim

…

TailDup

…