Reviewers: seanbruno, sdardis

Subscribers: tberghammer, danalbert, srhines, dsanders, sdardis, llvm-commits, seanbruno

Differential Revision: https://reviews.llvm.org/D23113

llvm-svn: 277732

llvm-svn: 277731

The new function now returns true if the shuffle should be commuted.

This will allow target shuffle combines to share the code.

llvm-svn: 277728

llvm-svn: 277727

On modern Intel processors hardware SQRT in many cases is faster than RSQRT
followed by Newton-Raphson refinement. The patch introduces a simple heuristic
to choose between hardware SQRT instruction and Newton-Raphson software
estimation.

The patch treats scalars and vectors differently. The heuristic is that for
scalars the compiler should optimize for latency while for vectors it should
optimize for throughput. It is based on the assumption that throughput bound
code is likely to be vectorized.

Basically, the patch disables scalar NR for big cores and disables NR completely
for Skylake. Firstly, scalar SQRT has shorter latency than NR code in big cores.
Secondly, vector SQRT has been greatly improved in Skylake and has better
throughput compared to NR.

Differential Revision: https://reviews.llvm.org/D21379

llvm-svn: 277725

Differential Revision: https://reviews.llvm.org/D22347

llvm-svn: 277719

llvm-svn: 277718

llvm-svn: 277716

When using orbis-llvm-cov.exe to generate the HTML report, the HTML report 
can look quite different to the source file if it includes tabs.The default
tab size is 2 spaces instead of 8 spaces. A command line switch is
be added to set the tab size.

Differential Revision: https://reviews.llvm.org/D23087

llvm-svn: 277715

libc++.so is now a linker script that includes -lc++abi if necessary.

Differential Revision: https://reviews.llvm.org/D22861

llvm-svn: 277714

[X86][SSE] Don't decide when to scalarize CTTZ/CTLZ for performance at lowering - this is what cost models are for

Improved CTTZ/CTLZ costings will be added shortly

llvm-svn: 277713

Enable tail calls by default for (micro)MIPS(64).

microMIPS is slightly more tricky than doing it for MIPS(R6) or microMIPSR6.
microMIPS has two instruction encodings: 16bit and 32bit along with some
restrictions on the size of the instruction that can fill the delay slot.
For safe tail calls for microMIPS, the delay slot filler attempts to find
a correct size instruction for the delay slot of TAILCALL pseudos.

Reviewers: dsanders, vkalintris

Subscribers: jfb, dsanders, sdardis, llvm-commits

Differential Revision: https://reviews.llvm.org/D21138

llvm-svn: 277708

llvm-svn: 277704

This should ensure that we can atomically write two bytes (on top of the
retq and the one past it) and have those two bytes not straddle cache
lines.

We also move the label past the alignment instruction so that we can refer
to the actual first instruction, as opposed to potential padding before the
aligned instruction.

Update the tests to allow us to reflect the new order of assembly.

Reviewers: rSerge, echristo, majnemer

Subscribers: llvm-commits, mehdi_amini

Differential Revision: https://reviews.llvm.org/D23101

llvm-svn: 277701

This just tests that the register limit isn't exceeded,
so the regisetr allocation doesn't need to be great.'

The critically slow part is all in greedy RA, so
switch to basic.

llvm-svn: 277700

llvm-svn: 277695

Summary: As per title.

Reviewers: majnemer, spatel

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D23139

llvm-svn: 277694

llvm-svn: 277693

This reinstates r277611 + r277614 and reverts r277642.  A cast_or_null
should have been a dyn_cast_or_null.

llvm-svn: 277691

This reverts commits r277685 & r277688. r277685 broke compiler-rt
compilation http://lab.llvm.org:8080/green/job/clang-stage1-configure-RA_build/23335
and r277685 is a followup from it.

llvm-svn: 277690

overloaded (and simpler).

Sean rightly pointed out in code review that we've started using
"wrapper pass" as a specific part of the old pass manager, and in fact
it is more applicable there. Here, we really have a pass *template* to
build a repeated pass, so call it that.

llvm-svn: 277689

Differential Revision: https://reviews.llvm.org/D23136

llvm-svn: 277688

As we addressed all compilation time problems with GVN-hoist
https://llvm.org/bugs/show_bug.cgi?id=28670
this patch turns GVN-hoist back by default.

Differential Revision: https://reviews.llvm.org/D23136

llvm-svn: 277685

Currently not all information can be restored from YAML.
This test verifies only the PDB header.

llvm-svn: 277682

pdbdump calls DbiStreamBuilder::commit through PDBFileBuilder::commit
without calling DbiStreamBuilder::finalize. Because `finalize` initializes
`Header` member, `Header` remained nullptr which caused a crash bug.

Differential Revision: https://reviews.llvm.org/D23143

llvm-svn: 277681

It wasn't very obvious that you're supposed to call help on the
subcommands. This should help.

llvm-svn: 277678

rewriteOperands() always performed liveness queries at the base index
rather than the RegSlot/Base as apropriate for the machine operand. This
could lead to illegal rewriting in some cases.

llvm-svn: 277661

llvm-svn: 277659

changing them to Expected<> to allow them to pass through llvm Errors.
No functional change.

This commit by itself will break the next lld builds.  I’ll be committing the
matching change for lld immediately next.

llvm-svn: 277656

This patch fixes pr25548.

Current implementation of PPCBoolRetToInt doesn't handle CallInst correctly, so it failed to do the intended optimization when there is a CallInst with parameters. This patch fixed that.

llvm-svn: 277655

This reverts commit r277610 / d619aa8878c3dafcc0d29a46517f63ff3209fdd4.

This make subtarget-no-movt.ll fail in
http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_check/26892,

llvm-svn: 277654

Not a correctness issue, but it would be nice if we didn't have to
recompute our block numbering (worst-case) every time we move MSSA.

llvm-svn: 277652

Limit the number of times the while(1) loop is executed. With this restriction
the number of hoisted instructions does not change in a significant way on the
test-suite.

Differential Revision: https://reviews.llvm.org/D23028

llvm-svn: 277651

With this patch we compute the DFS numbers of instructions only once and update
them during the code generation when an instruction gets hoisted.

Differential Revision: https://reviews.llvm.org/D23021

llvm-svn: 277650

With this patch we compute the MemorySSA once and update it in the code generator.

Differential Revision: https://reviews.llvm.org/D22966

llvm-svn: 277649

Some of these tests need to be cleaned up further to make it obvious
what they're testing, but as a first step remove all instances of
"grep".

llvm-svn: 277648

llvm-svn: 277645

This reverts commit r277611 and the followup r277614.

Bootstrap builds and chromium builds are crashing during inlining after
this change.

llvm-svn: 277642

Didn't want to fold this in with r277640, since it touches bits that
aren't entirely related to r277640.

llvm-svn: 277641

This is a follow-up to r277637. It teaches MemorySSA that invariant
loads (and loads of provably constant memory) are always liveOnEntry.

llvm-svn: 277640