Minimum latency determines per-cycle scheduling groups.
Expected latency determines critical path and cost.

llvm-svn: 158021

llvm-svn: 158020

expression (a * b + c) that can be implemented as a fused multiply-add (fma)
if the target determines that this will be more efficient. This intrinsic
will be used to implement FP_CONTRACT support and an aggressive FMA formation
mode.

If your target has a fast FMA instruction you should override the
isFMAFasterThanMulAndAdd method in TargetLowering to return true.

llvm-svn: 158014

llvm-svn: 158013

llvm-svn: 158007

llvm-svn: 158005

llvm-svn: 158004

IntegersSubsetMapping: added exclude operation, that allows to exclude subset of integers from current mapping.

llvm-svn: 157989

Changed type of Items collection: from std::vector to std::list.
Also some small fixes made in IntegersSubset.h, IntegersSubsetMapping.h and IntegersSubsetTest.cpp.

llvm-svn: 157987

llvm-svn: 157981

llvm-svn: 157980

This allows a subtarget to explicitly specify the issue width and
other properties without providing pipeline stage details for every
instruction.

llvm-svn: 157979

Use ILP heuristics for long latency instrs if no scoreboard exists.

llvm-svn: 157978

valid itinerary but no pipeline stages.

An itinerary can contain useful scheduling information without specifying pipeline stages for each instruction.

llvm-svn: 157977

llvm-svn: 157976

llvm-svn: 157975

Rematerialization is handled by LiveRangeEdit now.

llvm-svn: 157974

It is an old function that does a lot more than required by
CalcSpillWeights, which was the only remaining caller.

The isRematerializable() function never actually sets the isLoad
argument, so don't try to compute that.

llvm-svn: 157973

llvm-svn: 157972

when a compile time constant is known.  This occurs when implicitly zero 
extending function arguments from 16 bits to 32 bits.

<rdar://problem/11481151>

llvm-svn: 157966

llvm-svn: 157963

replacement to make it at least as generic as the instruction being replaced.
This includes:
* dropping nsw/nuw flags
* getting the least restrictive tbaa and fpmath metadata
* merging ranges

Fixes PR12979.

llvm-svn: 157958

No functional change.

llvm-svn: 157957

Remove the same pointers from all the other LiveRangeCalc functions,
simplifying the interface.

llvm-svn: 157941

llvm-svn: 157939

llvm-svn: 157938

inserted after the shift-left-logical node.

llvm-svn: 157937

llvm-svn: 157935

This was mostly done already in r156162, but I missed one place.

llvm-svn: 157929

llvm-svn: 157925

llvm-svn: 157920

llvm-svn: 157917

llvm-svn: 157915

Add VFMADDSUB and VFMSUBADD FMA instructions to folding tables. Also add 213 forms of scalar FMA instructions.

llvm-svn: 157914

llvm-svn: 157912

It seems that this no longer causes test suite failures on PPC64 (after r157159),
and often gives a performance benefit, so it can be enabled by default.

llvm-svn: 157911

vector. No functionality change.
Extracted from a patch by the PaX Team.

llvm-svn: 157909

Part of a patch by the PaX Team.

llvm-svn: 157908

llvm-svn: 157903

llvm-svn: 157902