non-landing pad basic block as the successor to a block that ends in an
unconditional jump will cause block folding to remove the added block as a
successor. Thus eventually removing it AND the landing pad entirely. Critical
edge splitting is an optimization, so we can safely turn it off when dealing
with landing pads.

llvm-svn: 91634

llvm-svn: 91632

llvm-svn: 91631

llvm-svn: 91626

llvm-svn: 91624

llvm-svn: 91623

to memcpy. (Such a memcpy is technically illegal, but in practice is safe
and is generated by struct self-assignment in C code.)

llvm-svn: 91621

llvm-svn: 91620

$ svn merge -c -91337 https://llvm.org/svn/llvm-project/llvm/trunk
--- Reverse-merging r91337 into '.':
U    lib/CodeGen/AsmPrinter/DwarfException.cpp

llvm-svn: 91618

LegalizeDAG.cpp. Unlike the code it replaces, which simply decrements the simple
type by one, getHalfSizedIntegerVT() searches for the smallest simple integer
type that is at least half the size of the type it is called on. This approach
has the advantage that it will continue working if a new value type (such as
i24) is added to MVT.

Also, in preparation for new value types, remove the assertions that
non-power-of-2 8-bit-mutiple types are Extended when legalizing extload and
truncstore operations.

llvm-svn: 91614

llvm-svn: 91612

llvm-svn: 91611

llvm-svn: 91607

llvm-svn: 91604

incrementing the simple value type of the 16-bit type, which would give the
wrong type if an intemediate MVT (such as i24) were introduced.

llvm-svn: 91602

Revert 91280-91283, 91286-91289, 91291, 91293, 91295-91296. It apparently introduced a non-deterministic behavior in the optimizer somewhere.

llvm-svn: 91598

folding in particular expects null to be on the RHS.

llvm-svn: 91587

llvm-svn: 91584

Fold (zext (and x, cst)) -> (and (zext x), cst)

DAG combiner likes to optimize expression in the other way so this would end up cause an infinite looping.

llvm-svn: 91574

llvm-svn: 91571

context) increment-of-bool idiom.

llvm-svn: 91564

Reapply r91392, it was only unmasking the bug, and since TOT is still broken having it reverted does no good.

llvm-svn: 91560

Reapply r91459, it was only unmasking the bug, and since TOT is still broken having it reverted does no good.

llvm-svn: 91559

llvm-svn: 91555

llvm-svn: 91554

Tail duplication produces lots of identical phi nodes in different basic
blocks. Teach PHIElimination to reuse the join registers when lowering a phi
node that is identical to an already lowered node. This saves virtual
registers, and more importantly it avoids creating copies the the coalescer
doesn't know how to eliminate.

Teach LiveIntervalAnalysis about the phi joins with multiple uses.

This patch significantly reduces code size produced by -pre-regalloc-taildup.

llvm-svn: 91549

problem", this broke llvm-gcc bootstrap for release builds on
x86_64-apple-darwin10.

This reverts commit db22309800b224a9f5f51baf76071d7a93ce59c9.

llvm-svn: 91534

this", this broke llvm-gcc bootstrap for release builds on
x86_64-apple-darwin10.

llvm-svn: 91533

miscompile (i386.o miscompares) but it happens both with and without
this patch.

llvm-svn: 91532

SmallVectorBase::grow_pod out of line, finally satisfying PR3758.

llvm-svn: 91529

is not used by anything performance sensitive, so just use std::string.

llvm-svn: 91528

a fixed size buffer is perfectly fine.

llvm-svn: 91527

llvm-svn: 91524

MDNodes that refer to an instruction are local to a function; in that case, explicitly keep track of the function they are local to

llvm-svn: 91497

bytes of Inst to 0x0000 for the benefit of the Thumb decoder.

llvm-svn: 91496

llvm-svn: 91489

Will reapply with a fix when I get a chance.

llvm-svn: 91486

in local register allocator.  If a reg-reg copy has a phys reg
input and a virt reg output, and this is the last use of the phys
reg, assign the phys reg to the virt reg.  If a reg-reg copy has
a phys reg output and we need to reload its spilled input, reload
it directly into the phys reg than passing it through another reg.

Following 76208, there is sometimes no dependency between the def of
a phys reg and its use; this creates a window where that phys reg
can be used for spilling (this is true in linear scan also).  This
is bad and needs to be fixed a better way, although 76208 works too
well in practice to be reverted.  However, there should normally be
no spilling within inline asm blocks.  The patch here goes a long way
towards making this actually be true.

llvm-svn: 91485

llvm-svn: 91481

enclosing namespace.  Caught by clang++.

llvm-svn: 91480