llvm-svn: 103347

This fixes the compile-time regressions seen in last night's tests.

llvm-svn: 103118

indirect branches in all the predecessors.  This avoids unnecessarily
splitting edges in cases where load PRE is not possible anyway.
Thanks to Jakub Staszak for pointing this out.

llvm-svn: 103034

Probably the best way to know that all getOperand() calls have been handled
is to replace that API instead of updating.

llvm-svn: 101579

with a fix for self-hosting

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101465

llvm-svn: 101434

with a fix

rotate CallInst operands, i.e. move callee to the back
of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101397

llvm-svn: 101376

llvm-svn: 101368

of the operand array

the motivation for this patch are laid out in my mail to llvm-commits:
more efficient access to operands and callee, faster callgraph-construction,
smaller compiler binary

llvm-svn: 101364

llvm-svn: 100856

llvm-svn: 99488

a loop and is itself the only dependency).

llvm-svn: 97526

predecessors before returning.  Otherwise, if multiple predecessor edges need
splitting, we only get one of them per iteration.  This makes a small but
measurable compile time improvement with -enable-full-load-pre.

llvm-svn: 97521

llvm-svn: 97512

llvm-svn: 97366

argument of createGVNPass and set it automatically for -O3.

llvm-svn: 97245

llvm-svn: 97235

llvm-svn: 97036

the DominatorTree. ...", in hopes of restoring poor old PPC bootstrap.

llvm-svn: 97027

argument is non-null, pass it along to PHITranslateSubExpr so that it can
prefer using existing values that dominate the PredBB, instead of just
blindly picking the first equivalent value that it finds on a uselist.
Also when the DominatorTree is specified, have PHITranslateValue filter
out any result that does not dominate the PredBB.  This is basically just
refactoring the check that used to be in GetAvailablePHITranslatedSubExpr
and also in GVN.

Despite my initial expectations, this change does not affect the results
of GVN for any testcases that I could find, but it should help compile time.
Before this change, if PHITranslateSubExpr picked a value that does not
dominate, PHITranslateWithInsertion would then insert a new value, which GVN
would later determine to be redundant and would replace.  By picking a good
value to begin with, we save GVN the extra work of inserting and then
replacing a new value.

llvm-svn: 97010

I don't have a small testcase for this.

llvm-svn: 96890

failures from ValueTable::verifyRemoved() when using -debug.

llvm-svn: 96805

llvm-svn: 96387

llvm-svn: 96378

terminator's list of successors.

llvm-svn: 96377

and T->isPointerTy().  Convert most instances of the first form to the second form.
Requested by Chris.

llvm-svn: 96344

llvm-svn: 95828

llvm-svn: 95170

disabled by default.  This divides the existing load PRE code into 2 phases:
first it checks that it is safe to move the load to each of the predecessors
where it is unavailable, and then if it is safe, the code is changed to move
the load.  Radar 7571861.

llvm-svn: 95007

unconditionally.  Besides checking the offset, also check that the underlying
object is aligned as much as the load itself.

llvm-svn: 94875

indices are safe if the result is known to be within the bounds of the
underlying object.

llvm-svn: 94829

already checked that TmpBB->getSinglePredecessor() is non-null.

llvm-svn: 94451

llvm-svn: 93693

non-zero trip count. Use SmallVector's pop_back_val().

llvm-svn: 92734

llvm-svn: 92613

non-templated IRBuilderBase class.  Move that large CreateGlobalString
out of line, eliminating the need to #include GlobalVariable.h in IRBuilder.h

llvm-svn: 92227

instead of stored.  This reduces memdep memory usage, and also eliminates a bunch of
weakvh's.  This speeds up gvn on gcc.c-torture/20001226-1.c from 23.9s to 8.45s (2.8x)
on a different machine than earlier.

llvm-svn: 91885

load to avoid even messing around with SSAUpdate at all.  In this case (which
is very common, we can just use the input value directly).

This speeds up GVN time on gcc.c-torture/20001226-1.c from 36.4s to 16.3s,
which still isn't great, but substantially better and this is a simple speedup
that applies to lots of different cases.

llvm-svn: 91851

llvm-svn: 91849