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

llvm-svn: 91622

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

llvm-svn: 91617

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: 91609

llvm-svn: 91607

llvm-svn: 91604

Patch from jon.forums at gmail.com

llvm-svn: 91603

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

llvm-svn: 91595

llvm-svn: 91594

llvm-svn: 91593

llvm-svn: 91592

llvm-svn: 91589

folding in particular expects null to be on the RHS.

llvm-svn: 91587

llvm-svn: 91584

llvm-svn: 91582

with -disassemble, llvm-mc now accepts lines of the
form
0x00 0x00
and passes the resulting bytes to the disassembler for
the chosen (or default) target, printing the result.

llvm-svn: 91579

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

llvm-svn: 91552

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

llvm-svn: 91536

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

This reverts commit db22309800b224a9f5f51baf76071d7a93ce59c9.

llvm-svn: 91534