PseudoSourceValue values, which never have names. Use getName()
for all other values, because we want to print just a short summary
of the value, not the entire instruction.

llvm-svn: 53738

llvm-svn: 53735

llvm-svn: 53734

llvm-svn: 53733

llvm-svn: 53732

more than once.

llvm-svn: 53731

llvm-svn: 53730

mask.  These are just indices into the shuffled vector
so their type is unrelated to the type of the
shuffled elements (which is what was being used before).
This fixes vec_shuffle-11.ll when using LegalizeTypes.
What seems to have happened is that Dan's recent change
r53687, which corrected the result type of the shuffle,
somehow caused LegalizeTypes to notice that the mask
operand was a BUILD_VECTOR with a legal type but elements
of an illegal type (i64).  LegalizeTypes legalized this
by introducing a new BUILD_VECTOR of i32 and bitcasting
it to the old type.  But the mask operand is not supposed
to be a bitcast but a straight BUILD_VECTOR of constants,
causing a crash.

llvm-svn: 53729

replacement of multiple values. This is slightly more efficient
than doing multiple ReplaceAllUsesOfValueWith calls, and theoretically
could be optimized even further. However, an important property of this
new function is that it handles the case where the source value set and
destination value set overlap. This makes it feasible for isel to use
SelectNodeTo in many very common cases, which is advantageous because
SelectNodeTo avoids a temporary node and it doesn't require CSEMap
updates for users of values that don't change position.

Revamp MorphNodeTo, which is what does all the work of SelectNodeTo, to
handle operand lists more efficiently, and to correctly handle a number
of corner cases to which its new wider use exposes it.

This commit also includes a change to the encoding of post-isel opcodes
in SDNodes; now instead of being sandwiched between the target-independent
pre-isel opcodes and the target-dependent pre-isel opcodes, post-isel
opcodes are now represented as negative values. This makes it possible
to test if an opcode is pre-isel or post-isel without having to know
the size of the current target's post-isel instruction set.

These changes speed up llc overall by 3% and reduce memory usage by 10%
on the InstructionCombining.cpp testcase with -fast and -regalloc=local.

llvm-svn: 53728

llvm-svn: 53727

only missing ppc long double operations: FNEG
and FP_EXTEND.

llvm-svn: 53723

llvm-svn: 53722

it is breaking Darwin bootstrap due to missing
functionality.

llvm-svn: 53721

llvm-svn: 53720

llvm-svn: 53719

llvm-svn: 53716

llvm-svn: 53715

atomic operation to the new one.

llvm-svn: 53714

llvm-svn: 53713

llvm-svn: 53712

llvm-svn: 53705

llvm-svn: 53697

llvm-svn: 53693

Mark function used by asm block as used, otherwise optimizer may not see the use and may delete the function.

llvm-svn: 53692

could cause problems for memdep when it breaks critical edges.

llvm-svn: 53691

llvm-svn: 53689

llvm-svn: 53688

was turned up by some new SelectionDAG assertion checks that I'm
working on.

llvm-svn: 53687

llvm-svn: 53686

llvm-svn: 53685

and AssertSext.  Needed when passing huge integer
parameters with the zeroext or signext attributes.

llvm-svn: 53684

difference in purpose of TargetInstrInfo and TargetInstrDesc,
which isn't immediately obvious from the name.

llvm-svn: 53683

llvm-svn: 53682

llvm-svn: 53681

llvm-svn: 53680

of all sizes from i1 to i256.  The code is not
always that great, for example (x86)
        movw    %di, %ax
        movw    %ax, i17_s
where the store could be directly from %di.

llvm-svn: 53677

sizes from i1 to i256.  The generated code is
like one huge bug report of things that the DAG
combiner fails to simplify!

llvm-svn: 53676

llvm-svn: 53675

Un-XFAIL multdeadretval, since instcombine now properly handles the mess deadargelim leaves behind :-)

llvm-svn: 53674

FindInsertedValue, it now performs a number of simple transformations that
should result in the same effect when applied iteratively.

llvm-svn: 53673