Disable rematting of it for now.

llvm-svn: 82975

phi nodes.  Make sure to phi translate from the right block. 

This fixes a llvm-building-llvm failure on GVN-PRE.cpp

llvm-svn: 82970

physical registers. This is especially critical for the later two since they
start the live interval of a super-register. e.g.
%DO<def> = INSERT_SUBREG %D0<undef>, %S0<kill>, 1
If this instruction is eliminated, the register scavenger will not be happy as
D0 is not defined previously.
This fixes PR5055.

llvm-svn: 82968

llvm-svn: 82953

the PassManager code into a regular verifyAnalysis method.

Also, reorganize loop verification. Make the LoopPass infrastructure
call verifyLoop as needed instead of having LoopInfo::verifyAnalysis
check every loop in the function after each looop pass. Add a new
command-line argument, -verify-loop-info, to enable the expensive
full checking.

llvm-svn: 82952

llvm-svn: 82951

code that stops the timer doesn't have to search to find the timer
object before it stops the timer. This avoids a lock acquisition
and a few other things done with the timer running.

llvm-svn: 82949

This should be better than single load from constpool.

llvm-svn: 82948

llvm-svn: 82947

a separate function.

llvm-svn: 82946

LoopPasses for that loop. This avoids trouble with the PassManager
trying to call verifyAnalysis on them, and frees up some memory
sooner rather than later.

llvm-svn: 82945

tidy it up a little.

llvm-svn: 82944

used to support GlobalVariables storing MDNodes, back when they were derived
from Constant before the introduction of NamedMDNode, but never removed.

llvm-svn: 82943

operand is now at index 2, rather than 3. This fixes the
"Invalid child # of SDNode!" failures on PowerPC.

llvm-svn: 82942

llvm-svn: 82936

The bitcast case is not needed here: instcombine turns icmp(bitcast(x), null) -> icmp(x, null) already.  

llvm-svn: 82935

llvm-svn: 82933

malloc isn't needed.

llvm-svn: 82932

llvm-svn: 82931

llvm-svn: 82930

llvm-svn: 82929

when the loop inspects the bitcast operand.

llvm-svn: 82928

llvm-svn: 82927

These are important to push up to encourage jump threading.  This shrinks 176.gcc a bit.

llvm-svn: 82923

simple constants for the true/false value of the select.  We now
do phi translation etc.  This really fixes PR4895 :)

llvm-svn: 82917

that are phi nodes.  Also tighten up FoldOpIntoPhi to treat constantexpr
operands to phis just like other variables, avoiding moving constantexpr
computations around.

Patch by Daniel Dunbar.

llvm-svn: 82913

llvm-svn: 82909

llvm-svn: 82908

aren't in canonical loop-simplify form, since it doesn't itself depend
on LoopSimplify. This means handling loops without preheaders and loops
with multiple backedges.

llvm-svn: 82905

that is deleted in some situations. This fixes a use-after-free.

llvm-svn: 82903

rotating the loop, since loop rotation is a very significant change.

llvm-svn: 82901

llvm-svn: 82900

test whether it properly dominates the loop header. This is equivalent
when the loop has a preheader, and has the advantage of working when
the loop doesn't have a preheader. Since IVUsers doesn't Require
LoopSimplify, the loop isn't guaranteed to have a preheader.

llvm-svn: 82899

llvm-svn: 82898

llvm-svn: 82897

in RegisterStatistic.

llvm-svn: 82896

llvm-svn: 82893

LangRef entry too.

llvm-svn: 82890

update all the callers.

llvm-svn: 82889

and makes the API more annoying.  Add a Regex::getNumMatches() method.

llvm-svn: 82877