OSDN Git Service

android-x86/external-llvm.git
6 years ago[NFC][testcases] add testcases for folding srem whose operands are negatived.
Chen Zheng [Tue, 17 Jul 2018 12:31:54 +0000 (12:31 +0000)]
[NFC][testcases] add testcases for folding srem whose operands are negatived.

Finish same optimization for add instruction in D49216 and sdiv instruction in
D49382. This patch is for srem instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337270 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoDon't assert that a size_t fits into 64bit.
Joerg Sonnenberger [Tue, 17 Jul 2018 12:30:34 +0000 (12:30 +0000)]
Don't assert that a size_t fits into 64bit.

Avoids tautological compare warnings on 32bit platforms.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337269 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[LLVM-C] Fix name mangling on AggressiveInstCombine
whitequark [Tue, 17 Jul 2018 11:13:58 +0000 (11:13 +0000)]
[LLVM-C] Fix name mangling on AggressiveInstCombine

Similarly to rL336736, at least one more C API function does not
properly get declared as extern "C" due to a missing header, causing
name mangling and linking errors.

This patch fixes calls to LLVMAddAggressiveInstCombinerPass().

Differential Revision: https://reviews.llvm.org/D49416

Reviewed By: whitequark

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337264 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[LLVM-C] Add target triple normalization to the C API.
whitequark [Tue, 17 Jul 2018 10:57:39 +0000 (10:57 +0000)]
[LLVM-C] Add target triple normalization to the C API.

rL333307 was introduced to remove automatic target triple
normalization when calling sys::getDefaultTargetTriple(), arguing
that users of the latter already called Triple::normalize()
if necessary. However, users of the C API currently have no way of
doing target triple normalization.

This patch introduces an LLVMNormalizeTargetTriple function to
the C API which wraps Triple::normalize() and can be used on
the result of LLVMGetDefaultTargetTriple to achieve the same effect.

Differential Revision: https://reviews.llvm.org/D49414

Reviewed By: whitequark

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337263 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-objcopy] Run not with any python, but the python configured in lit.
Benjamin Kramer [Tue, 17 Jul 2018 10:30:56 +0000 (10:30 +0000)]
[llvm-objcopy] Run not with any python, but the python configured in lit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337262 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AArch64][SVE] Asm: Support for predicated FP operations.
Sander de Smalen [Tue, 17 Jul 2018 09:48:57 +0000 (09:48 +0000)]
[AArch64][SVE] Asm: Support for predicated FP operations.

This patch adds support for the following floating point
instructions:
  FABD   (absolute difference)
  FADD   (addition)
  FSUB   (subtract)
  FSUBR  (subtract reverse form)
  FDIV   (divide)
  FDIVR  (divide reverse form)
  FMAX   (maximum)
  FMAXNM (maximum number)
  FMIN   (minimum)
  FMINNM (minimum number)
  FSCALE (adjust exponent)
  FMULX  (multiply extended)

All operations are predicated and binary form, e.g.

  fadd z0.h, p0/m, z0.h, z1.h
        ^___________^ (tied)

Supporting 16, 32 and 64-bit FP elements.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337259 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[DAGCombiner] Call SimplifyDemandedVectorElts from EXTRACT_VECTOR_ELT
Simon Pilgrim [Tue, 17 Jul 2018 09:45:35 +0000 (09:45 +0000)]
[DAGCombiner] Call SimplifyDemandedVectorElts from EXTRACT_VECTOR_ELT

If we are only extracting vector elements via EXTRACT_VECTOR_ELT(s) we may be able to use SimplifyDemandedVectorElts to avoid unnecessary vector ops.

Differential Revision: https://reviews.llvm.org/D49262

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337258 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoFix MSVC "result of 32-bit shift implicitly converted to 64 bits" warning. NFCI.
Simon Pilgrim [Tue, 17 Jul 2018 09:39:55 +0000 (09:39 +0000)]
Fix MSVC "result of 32-bit shift implicitly converted to 64 bits" warning. NFCI.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337257 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AArch64][SVE] Asm: Support for SPLICE instruction.
Sander de Smalen [Tue, 17 Jul 2018 08:52:45 +0000 (08:52 +0000)]
[AArch64][SVE] Asm: Support for SPLICE instruction.

The SPLICE instruction splices two vectors into one vector using a
predicate. It copies the active elements from the first vector, and
then fills the remaining elements with the low-numbered elements from
the second vector.

The instruction has the following form, e.g.

  splice z0.b, p0, z0.b, z1.b

for 8-bit elements. It also supports 16, 32 and
64-bit elements.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337253 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AArch64][SVE] Asm: Support for EXT instruction.
Sander de Smalen [Tue, 17 Jul 2018 08:39:48 +0000 (08:39 +0000)]
[AArch64][SVE] Asm: Support for EXT instruction.

This patch adds an instruction that allows extracting
a vector from a pair of vectors, given an immediate index
that describes the element position to extract from.

The instruction has the following assembly:
  ext z0.b, z0.b, z1.b, #imm

where #imm is an immediate between 0 and 255.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337251 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Properly qualify some MOVSS/MOVSD patterns with OptSize.
Craig Topper [Tue, 17 Jul 2018 06:24:16 +0000 (06:24 +0000)]
[X86] Properly qualify some MOVSS/MOVSD patterns with OptSize.

These are integer versions of patterns that I already fixed for floating point.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337240 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[Sparc] Do not depend on icc for ta 1
Daniel Cederman [Tue, 17 Jul 2018 05:49:33 +0000 (05:49 +0000)]
[Sparc] Do not depend on icc for ta 1

The ta instruction will always trap, regardless of the value
of the integer condition codes. TRAPri is marked as using icc,
so we cannot use a pattern for TRAPri to implement ta 1, as
verify-machineinstrs can complain that icc is not defined.
Instead we implement ta 1 the same way as ta 5.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337236 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add full set of patterns for turning ceil/floor/trunc/rint/nearbyint into rndsc...
Craig Topper [Tue, 17 Jul 2018 05:48:48 +0000 (05:48 +0000)]
[X86] Add full set of patterns for turning ceil/floor/trunc/rint/nearbyint into rndscale with loads, broadcast, and masking.

This amounts to pretty ridiculous number of patterns. Ideally we'd canonicalize the X86ISD::VRNDSCALE earlier to reuse those patterns. I briefly looked into doing that, but some strict FP operations could still get converted to rint and nearbyint during isel. It's probably still worthwhile to look into. This patch is meant as a starting point to work from.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337234 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add test cases for selecting floor/ceil/trunc/rint/nearbyint to rndscale with...
Craig Topper [Tue, 17 Jul 2018 05:48:46 +0000 (05:48 +0000)]
[X86] Add test cases for selecting floor/ceil/trunc/rint/nearbyint to rndscale with masking, loading, and broadcasting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337233 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[testcases] move testcases to right place - NFC
Chen Zheng [Tue, 17 Jul 2018 01:04:41 +0000 (01:04 +0000)]
[testcases] move testcases to right place - NFC

Differential Revision: https://reviews.llvm.org/D49409

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337230 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-mca][docs] Add notes about cycle and resource callbacks. NFC.
Matt Davis [Mon, 16 Jul 2018 23:50:53 +0000 (23:50 +0000)]
[llvm-mca][docs] Add notes about cycle and resource callbacks. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337225 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add a missing FMA3 scalar intrinsic pattern.
Craig Topper [Mon, 16 Jul 2018 23:10:58 +0000 (23:10 +0000)]
[X86] Add a missing FMA3 scalar intrinsic pattern.

This allows us to use 231 form to fold an insertelement on the add input to the fma. There is technically no software intrinsic that can use this until AVX512F, but it can be manually built up from other intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337223 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[WebAssembly] Remove ELF file support.
Sam Clegg [Mon, 16 Jul 2018 23:09:29 +0000 (23:09 +0000)]
[WebAssembly] Remove ELF file support.

This support was partial and temporary.  Now that we have
wasm object file support its no longer needed.

Differential Revision: https://reviews.llvm.org/D48744

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337222 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[Intrinsics] define funnel shift IR intrinsics + DAG builder support
Sanjay Patel [Mon, 16 Jul 2018 22:59:31 +0000 (22:59 +0000)]
[Intrinsics] define funnel shift IR intrinsics + DAG builder support

As discussed here:
http://lists.llvm.org/pipermail/llvm-dev/2018-May/123292.html
http://lists.llvm.org/pipermail/llvm-dev/2018-July/124400.html

We want to add rotate intrinsics because the IR expansion of that pattern is 4+ instructions,
and we can lose pieces of the pattern before it gets to the backend. Generalizing the operation
by allowing 2 different input values (plus the 3rd shift/rotate amount) gives us a "funnel shift"
operation which may also be a single hardware instruction.

Initially, I thought we needed to define new DAG nodes for these ops, and I spent time working
on that (much larger patch), but then I concluded that we don't need it. At least as a first
step, we have all of the backend support necessary to match these ops...because it was required.
And shepherding these through the IR optimizer is the primary concern, so the IR intrinsics are
likely all that we'll ever need.

There was also a question about converting the intrinsics to the existing ROTL/ROTR DAG nodes
(along with improving the oversized shift documentation). Again, I don't think that's strictly
necessary (as the test results here prove). That can be an efficiency improvement as a small
follow-up patch.

So all we're left with is documentation, definition of the IR intrinsics, and DAG builder support.

Differential Revision: https://reviews.llvm.org/D49242

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337221 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][llvm-objcopy] Make helper functions static
Puyan Lotfi [Mon, 16 Jul 2018 22:17:05 +0000 (22:17 +0000)]
[NFC][llvm-objcopy] Make helper functions static

Anywhere in tools/llvm-objcopy where functions or classes are not referenced
outside of a given file, we change things to make the function or class static
or put inside an anonymous namespace.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337220 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-mca][docs] Initial description of mca internals. NFC
Matt Davis [Mon, 16 Jul 2018 21:42:58 +0000 (21:42 +0000)]
[llvm-mca][docs] Initial description of mca internals. NFC

This patch introduces a brief description of the components of MCA.  The main
focus is on Views.   This is a work in progress, and more descriptions will be
introduced later.  I want to flesh-out the Views section more and provide a
detailed description of eventing in MCA.  Eventually a brief code example of a
View should accompany the description.

Also, we should consider moving the MCA internals guide elsewhere at some point.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337219 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoAdd missing includes.
Zachary Turner [Mon, 16 Jul 2018 21:34:25 +0000 (21:34 +0000)]
Add missing includes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337218 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[LLVMDemangle] Move some utility classes to header files.
Zachary Turner [Mon, 16 Jul 2018 21:24:03 +0000 (21:24 +0000)]
[LLVMDemangle] Move some utility classes to header files.

In a followup I'm looking to add a Microsoft demangler.  Doing
so needs a lot of the same utility classes and feature test
macros which are already implemented in ItaniumDemangle.cpp.
So move all of these things into header files so that they
can be re-used by a new demangler.

Differential Revision: https://reviews.llvm.org/D49399

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337217 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Fine-tune 'check for [no] signed truncation' tests
Roman Lebedev [Mon, 16 Jul 2018 20:10:46 +0000 (20:10 +0000)]
[NFC][InstCombine] Fine-tune 'check for [no] signed truncation' tests

We are using i8 for these tests, and shifting by 4,
which is exactly the half of i8.

But as it is seen from the proofs https://rise4fun.com/Alive/mgu
KeptBits = bitwidth(%x) - MaskedBits,
so with using shifts by 4, we are not really testing that
we actually properly handle the other cases with shifts not by half...

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337208 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-objcopy] Add support for large indexes
Jake Ehrlich [Mon, 16 Jul 2018 19:48:52 +0000 (19:48 +0000)]
[llvm-objcopy] Add support for large indexes

This patch is an update of an older patch that never landed
(see here: https://reviews.llvm.org/D42516)

Recently various users have run into this issue and it just 100%
has to be solved at this point. The main difference in this patch
is that I use gunzip instead of unzip which should hopefully allow
tests to pass. Please review this as if it is a new patch however.
I found some issues along the way and made some minor modifications.

The binary used in this patch for testing (a zip file to make it small)
can be found here:
https://drive.google.com/file/d/1UjsnTO9edLttZibbr-2T1bJl92KEQFAO/view?usp=sharing

Differential Revision: https://reviews.llvm.org/D49206

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337204 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[CodeGen] Fix inconsistent declaration parameter name
Fangrui Song [Mon, 16 Jul 2018 18:51:40 +0000 (18:51 +0000)]
[CodeGen] Fix inconsistent declaration parameter name

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337200 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AMDGPU] [AMDGPU] Support a fdot2 pattern.
Farhana Aleen [Mon, 16 Jul 2018 18:19:59 +0000 (18:19 +0000)]
[AMDGPU] [AMDGPU] Support a fdot2 pattern.

Summary: Optimize fma((float)S0.x, (float)S1.x fma((float)S0.y, (float)S1.y, z))
                   -> fdot2((v2f16)S0, (v2f16)S1, (float)z)

Author: FarhanaAleen

Reviewed By: rampitec, b-sumner

Subscribers: AMDGPU

Differential Revision: https://reviews.llvm.org/D49146

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337198 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm] Change 2 instances of std::sort to llvm::sort
Mandeep Singh Grang [Mon, 16 Jul 2018 17:26:37 +0000 (17:26 +0000)]
[llvm] Change 2 instances of std::sort to llvm::sort

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337192 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold 'check for [no] signed truncation' pattern
Roman Lebedev [Mon, 16 Jul 2018 16:45:42 +0000 (16:45 +0000)]
[InstCombine] Fold 'check for [no] signed truncation' pattern

Summary:
[[ https://bugs.llvm.org/show_bug.cgi?id=38149 | PR38149 ]]

As discussed in https://reviews.llvm.org/D49179#1158957 and later,
the IR for 'check for [no] signed truncation' pattern can be improved:
https://rise4fun.com/Alive/gBf
^ that pattern will be produced by Implicit Integer Truncation sanitizer,
https://reviews.llvm.org/D48958 https://bugs.llvm.org/show_bug.cgi?id=21530
in signed case, therefore it is probably a good idea to improve it.

Proofs for this transform: https://rise4fun.com/Alive/mgu
This transform is surprisingly frustrating.
This does not deal with non-splat shift amounts, or with undef shift amounts.
I've outlined what i think the solution should be:
```
  // Potential handling of non-splats: for each element:
  //  * if both are undef, replace with constant 0.
  //    Because (1<<0) is OK and is 1, and ((1<<0)>>1) is also OK and is 0.
  //  * if both are not undef, and are different, bailout.
  //  * else, only one is undef, then pick the non-undef one.
```

The DAGCombine will reverse this transform, see
https://reviews.llvm.org/D49266

Reviewers: spatel, craig.topper

Reviewed By: spatel

Subscribers: JDevlieghere, rkruppe, llvm-commits

Differential Revision: https://reviews.llvm.org/D49320

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337190 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[RegAlloc] Skip global splitting if the live range is huge and its spill is
Wei Mi [Mon, 16 Jul 2018 15:42:20 +0000 (15:42 +0000)]
[RegAlloc] Skip global splitting if the live range is huge and its spill is
trivially rematerializable.

We run into a case where machineLICM hoists a large number of live ranges
outside of a big loop because it thinks those live ranges are trivially
rematerializable. In regalloc, global splitting is tried out first for those
live ranges before they are spilled and rematerialized. Because the global
splitting algorithm is quadratic, increasing a lot of global splitting
candidates causes huge compile time increase (50s to 1400s on my local
machine when compiling a module).

However, we think for live ranges which are very large and are trivially
rematerialiable, it is better to just skip global splitting so as to save
compile time with little chance of sacrificing performance.  We uses the
segment size of live range to indirectly evaluate whether the global
splitting of the live range can introduce high cost, and use an option
as a knob to adjust the size limit threshold.

Differential Revision: https://reviews.llvm.org/D49353

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337186 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoRestore "[ThinLTO] Ensure we always select the same function copy to import"
Teresa Johnson [Mon, 16 Jul 2018 15:30:27 +0000 (15:30 +0000)]
Restore "[ThinLTO] Ensure we always select the same function copy to import"

This reverts commit r337081, therefore restoring r337050 (and fix in
r337059), with test fix for bot failure described after the original
description below.

In order to always import the same copy of a linkonce function,
even when encountering it with different thresholds (a higher one then a
lower one), keep track of the summary we decided to import.
This ensures that the backend only gets a single definition to import
for each GUID, so that it doesn't need to choose one.

Move the largest threshold the GUID was considered for import into the
current module out of the ImportMap (which is part of a larger map
maintained across the whole index), and into a new map just maintained
for the current module we are computing imports for. This saves some
memory since we no longer have the thresholds maintained across the
whole index (and throughout the in-process backends when doing a normal
non-distributed ThinLTO build), at the cost of some additional
information being maintained for each invocation of ComputeImportForModule
(the selected summary pointer for each import).

There is an additional map lookup for each callee being considered for
importing, however, this was able to subsume a map lookup in the
Worklist iteration that invokes computeImportForFunction. We also are
able to avoid calling selectCallee if we already failed to import at the
same or higher threshold.

I compared the run time and peak memory for the SPEC2006 471.omnetpp
benchmark (running in-process ThinLTO backends), as well as for a large
internal benchmark with a distributed ThinLTO build (so just looking at
the thin link time/memory). Across a number of runs with and without
this change there was no significant change in the time and memory.

(I tried a few other variations of the change but they also didn't
improve time or peak memory).

The new commit removes a test that no longer makes sense
(Transforms/FunctionImport/hotness_based_import2.ll), as exposed by the
reverse-iteration bot. The test depends on the order of processing the
summary call edges, and actually depended on the old problematic
behavior of selecting more than one summary for a given GUID when
encountered with different thresholds. There was no guarantee even
before that we would eventually pick the linkonce copy with the hottest
call edges, it just happened to work with the test and the old code, and
there was no guarantee that we would end up importing the selected
version of the copy that had the hottest call edges (since the backend
would effectively import only one of the selected copies).

Reviewers: davidxl

Subscribers: mehdi_amini, inglorion, llvm-commits

Differential Revision: https://reviews.llvm.org/D48670

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337184 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[cfi-verify] Abort on unsupported targets
Joel Galenson [Mon, 16 Jul 2018 15:26:44 +0000 (15:26 +0000)]
[cfi-verify] Abort on unsupported targets

As suggested in the review for r337007, this makes cfi-verify abort on unsupported targets instead of producing incorrect results.  It also updates the design document to reflect this.

Differential Revision: https://reviews.llvm.org/D49304

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337181 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstrSimplify] add testcases for fold sdiv if two operands are negatived and non...
Chen Zheng [Mon, 16 Jul 2018 15:06:42 +0000 (15:06 +0000)]
[InstrSimplify] add testcases for fold sdiv if two operands are negatived and non-overflow

Differential Revision: https://reviews.llvm.org/D49365

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337179 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Completely rework how we sink post-load hardening past data
Chandler Carruth [Mon, 16 Jul 2018 14:58:32 +0000 (14:58 +0000)]
[x86/SLH] Completely rework how we sink post-load hardening past data
invariant instructions to be both more correct and much more powerful.

While testing, I continued to find issues with sinking post-load
hardening. Unfortunately, it was amazingly hard to create any useful
tests of this because we were mostly sinking across copies and other
loading instructions. The fact that we couldn't sink past normal
arithmetic was really a big oversight.

So first, I've ported roughly the same set of instructions from the data
invariant loads to also have their non-loading varieties understood to
be data invariant. I've also added a few instructions that came up so
often it again made testing complicated: inc, dec, and lea.

With this, I was able to shake out a few nasty bugs in the validity
checking. We need to restrict to hardening single-def instructions with
defined registers that match a particular form: GPRs that don't have
a NOREX constraint directly attached to their register class.

The (tiny!) test case included catches all of the issues I was seeing
(once we can sink the hardening at all) except for the NOREX issue. The
only test I have there is horrible. It is large, inexplicable, and
doesn't even produce an error unless you try to emit encodings. I can
keep looking for a way to test it, but I'm out of ideas really.

Thanks to Ben for giving me at least a sanity-check review. I'll follow
up with Craig to go over this more thoroughly post-commit, but without
it SLH crashes everywhere so landing it for now.

Differential Revision: https://reviews.llvm.org/D49378

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337177 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[mips] Eliminate the usage of hasStdEnc in MipsPat.
Simon Atanasyan [Mon, 16 Jul 2018 13:52:41 +0000 (13:52 +0000)]
[mips] Eliminate the usage of hasStdEnc in MipsPat.

Instead, the pattern is tagged with the correct predicate when
it is declared. Some patterns have been duplicated as necessary.

Patch by Simon Dardis.

Differential revision: https://reviews.llvm.org/D48365

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337171 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[MIPS GlobalISel] Select instructions to load and store i32 on stack
Petar Jovanovic [Mon, 16 Jul 2018 13:29:32 +0000 (13:29 +0000)]
[MIPS GlobalISel] Select instructions to load and store i32 on stack

Add code for selection of G_LOAD, G_STORE, G_GEP, G_FRAMEINDEX and
G_CONSTANT. Support loads and stores of i32 values.

Patch by Petar Avramovic.

Differential Revision: https://reviews.llvm.org/D48957

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337168 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86][AArch64][DAGCombine] Unfold 'check for [no] signed truncation' pattern
Roman Lebedev [Mon, 16 Jul 2018 12:44:10 +0000 (12:44 +0000)]
[X86][AArch64][DAGCombine] Unfold 'check for [no] signed truncation' pattern

Summary:

[[ https://bugs.llvm.org/show_bug.cgi?id=38149 | PR38149 ]]

As discussed in https://reviews.llvm.org/D49179#1158957 and later,
the IR for 'check for [no] signed truncation' pattern can be improved:
https://rise4fun.com/Alive/gBf
^ that pattern will be produced by Implicit Integer Truncation sanitizer,
https://reviews.llvm.org/D48958 https://bugs.llvm.org/show_bug.cgi?id=21530
in signed case, therefore it is probably a good idea to improve it.

But the IR-optimal patter does not lower efficiently, so we want to undo it..

This handles the simple pattern.
There is a second pattern with predicate and constants inverted.

NOTE: we do not check uses here. we always do the transform.

Reviewers: spatel, craig.topper, RKSimon, javed.absar

Reviewed By: spatel

Subscribers: kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D49266

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337166 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[Sparc] Use the correct encoding for ta 3
Daniel Cederman [Mon, 16 Jul 2018 12:28:26 +0000 (12:28 +0000)]
[Sparc] Use the correct encoding for ta 3

Summary: The old encoding generated a "tn %g1 + 3" instruction instead
of the expected "ta 3".

Reviewers: venkatra, jyknight

Reviewed By: jyknight

Subscribers: fedor.sergeev, jrtc27, llvm-commits

Differential Revision: https://reviews.llvm.org/D49171

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337165 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[Sparc] Use the names .rem and .urem instead of __modsi3 and __umodsi3
Daniel Cederman [Mon, 16 Jul 2018 12:22:08 +0000 (12:22 +0000)]
[Sparc] Use the names .rem and .urem instead of __modsi3 and __umodsi3

Summary: These are the names used in libgcc.

Reviewers: venkatra, jyknight, ekedaigle

Reviewed By: jyknight

Subscribers: joerg, fedor.sergeev, jrtc27, llvm-commits

Differential Revision: https://reviews.llvm.org/D48915

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337164 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[Sparc] Generate ta 1 for the @llvm.debugtrap intrinsic
Daniel Cederman [Mon, 16 Jul 2018 12:16:53 +0000 (12:16 +0000)]
[Sparc] Generate ta 1 for the @llvm.debugtrap intrinsic

Summary: Software trap number one is the trap used for breakpoints
in the Sparc ABI.

Reviewers: jyknight, venkatra

Reviewed By: jyknight

Subscribers: fedor.sergeev, jrtc27, llvm-commits

Differential Revision: https://reviews.llvm.org/D48637

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337163 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoAvoid losing Hi part when expanding VAARG nodes on big endian machines
Daniel Cederman [Mon, 16 Jul 2018 12:14:17 +0000 (12:14 +0000)]
Avoid losing Hi part when expanding VAARG nodes on big endian machines

Summary:
If the high part of the load is not used the offset to the next element
will not be set correctly.

For example, on Sparc V8, the following code will read val2 from offset 4
instead of 8.

```
int val = __builtin_va_arg(va, long long);
int val2 = __builtin_va_arg(va, int);
```

Reviewers: jyknight

Reviewed By: jyknight

Subscribers: fedor.sergeev, jrtc27, llvm-commits

Differential Revision: https://reviews.llvm.org/D48595

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337161 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Fix a bug where we would try to post-load harden non-GPRs.
Chandler Carruth [Mon, 16 Jul 2018 11:38:48 +0000 (11:38 +0000)]
[x86/SLH] Fix a bug where we would try to post-load harden non-GPRs.

Found cases that hit the assert I added. This patch factors the validity
checking into a nice helper routine and calls it when deciding to harden
post-load, and asserts it when doing so later.

I've added tests for the various ways of loading a floating point type,
as well as loading all vector permutations. Even though many of these go
to identical instructions, it seems good to somewhat comprehensively
test them.

I'm confident there will be more fixes needed here, I'll try to add
tests each time as I get this predicate adjusted.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337160 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoMSan: minor fixes, NFC
Alexander Potapenko [Mon, 16 Jul 2018 10:57:19 +0000 (10:57 +0000)]
MSan: minor fixes, NFC

 - remove an extra space after |ID| declaration
 - drop the unused |FirstInsn| parameter in getShadowOriginPtrUserspace()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337159 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AccelTable] Provide DWARF5AccelTableStaticData for dsymutil.
Jonas Devlieghere [Mon, 16 Jul 2018 10:52:27 +0000 (10:52 +0000)]
[AccelTable] Provide DWARF5AccelTableStaticData for dsymutil.

For dsymutil we want to store offsets in the accelerator table entries
rather than DIE pointers. In addition, we need a way to communicate
which CU a DIE belongs to. This patch provides support for both of these
issues.

Differential revision: https://reviews.llvm.org/D49102

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337158 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Extract another small helper function, add better comments and
Chandler Carruth [Mon, 16 Jul 2018 10:46:16 +0000 (10:46 +0000)]
[x86/SLH] Extract another small helper function, add better comments and
use better terminology. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337157 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AMDGPU][Waitcnt] Re-apply fix "comparison of integers of different signs" build...
Mark Searles [Mon, 16 Jul 2018 10:21:36 +0000 (10:21 +0000)]
[AMDGPU][Waitcnt] Re-apply fix "comparison of integers of different signs" build error"

Re-apply "[AMDGPU][Waitcnt] fix "comparison of integers of different signs" build error""
fe0a456510131f268e388c4a18a92f575c0db183 ), which was inadvertantly reverted via
2b2ee080f0164485562593b1b87291a48cea4a9a .

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337156 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[MSan] factor userspace-specific declarations into createUserspaceApi(). NFC
Alexander Potapenko [Mon, 16 Jul 2018 10:03:30 +0000 (10:03 +0000)]
[MSan] factor userspace-specific declarations into createUserspaceApi(). NFC

This patch introduces createUserspaceApi() that creates function/global
declarations for symbols used by MSan in the userspace.
This is a step towards the upcoming KMSAN implementation patch.

Reviewed at https://reviews.llvm.org/D49292

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337155 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agorun post-RA hazard recognizer pass late
Mark Searles [Mon, 16 Jul 2018 10:02:41 +0000 (10:02 +0000)]
run post-RA hazard recognizer pass late

Memory legalizer, waitcnt, and shrink  passes can perturb the instructions,
which means that the post-RA hazard recognizer pass should run after them.
Otherwise, one of those passes may invalidate the work done by the hazard
recognizer. Note that this has adverse side-effect that any consecutive
S_NOP 0's, emitted by the hazard recognizer, will not be shrunk into a
single S_NOP <N>. This should be addressed in a follow-on patch.

Differential Revision: https://reviews.llvm.org/D49288

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337154 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoRevert "[AMDGPU][Waitcnt] fix "comparison of integers of different signs" build error"
Mark Searles [Mon, 16 Jul 2018 10:02:40 +0000 (10:02 +0000)]
Revert "[AMDGPU][Waitcnt] fix "comparison of integers of different signs" build error"

This reverts commit fe0a456510131f268e388c4a18a92f575c0db183.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337153 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[MemorySSAUpdater] Remove deleted trivial Phis from active workset
Alexandros Lamprineas [Mon, 16 Jul 2018 07:51:27 +0000 (07:51 +0000)]
[MemorySSAUpdater] Remove deleted trivial Phis from active workset

Bug fix for PR37808. The regression test is a reduced version of the
original reproducer attached to the bug report. As stated in the report,
the problem was that InsertedPHIs was keeping dangling pointers to
deleted Memory-Phis. MemoryPhis are created eagerly and sometimes get
zapped shortly afterwards. I've used WeakVH instead of an expensive
removal operation from the active workset.

Differential Revision: https://reviews.llvm.org/D48372

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337149 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Merge the FR128 and VR128 regclass since they have identical spill and alignmen...
Craig Topper [Mon, 16 Jul 2018 06:56:09 +0000 (06:56 +0000)]
[X86] Merge the FR128 and VR128 regclass since they have identical spill and alignment characteristics.

This unfortunately requires a bunch of bitcasts to be added added to SUBREG_TO_REG, COPY_TO_REGCLASS, and instructions in output patterns. Otherwise tablegen seems to default to picking f128 and then we fail when something tries to get the register class for f128 which isn't always valid.

The test changes are because we were previously mixing fr128 and vr128 due to contrainRegClass finding FR128 first and passes like live range shrinking weren't handling that well.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337147 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Fix an unused variable warning in release builds after
Chandler Carruth [Mon, 16 Jul 2018 04:42:27 +0000 (04:42 +0000)]
[x86/SLH] Fix an unused variable warning in release builds after
r337144.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337145 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Teach speculative load hardening to correctly harden the
Chandler Carruth [Mon, 16 Jul 2018 04:17:51 +0000 (04:17 +0000)]
[x86/SLH] Teach speculative load hardening to correctly harden the
indices used by AVX2 and AVX-512 gather instructions.

The index vector is hardened by broadcasting the predicate state
into a vector register and then or-ing. We don't even have to worry
about EFLAGS here.

I've added a test for all of the gather intrinsics to make sure that we
don't miss one. A particularly interesting creation is the gather
prefetch, which needs to be marked as potentially "loading" to get the
correct behavior. It's a memory access in many ways, and is actually
relevant for SLH. Based on discussion with Craig in review, I've moved
it to be `mayLoad` and `mayStore` rather than generic side effects. This
matches how we model other prefetch instructions.

Many thanks to Craig for the review here.

Differential Revision: https://reviews.llvm.org/D49336

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337144 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] add more SPFofSPF folding
Chen Zheng [Mon, 16 Jul 2018 02:23:00 +0000 (02:23 +0000)]
[InstCombine] add more SPFofSPF folding

Differential Revision: https://reviews.llvm.org/D49238

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337143 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] fold icmp pred (sub 0, X) C for vector type
Chen Zheng [Mon, 16 Jul 2018 00:51:40 +0000 (00:51 +0000)]
[InstCombine] fold icmp pred (sub 0, X) C for vector type

Differential Revision: https://reviews.llvm.org/D49283

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337141 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoRecommit r335794 "Add support for generating a call graph profile from Branch Frequen...
Michael J. Spencer [Mon, 16 Jul 2018 00:28:24 +0000 (00:28 +0000)]
Recommit r335794 "Add support for generating a call graph profile from Branch Frequency Info." with fix for removed functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337140 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoPrune empty directory.
Joerg Sonnenberger [Sun, 15 Jul 2018 23:52:15 +0000 (23:52 +0000)]
Prune empty directory.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337139 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Extract one of the bits of logic to its own function. NFC.
Chandler Carruth [Sun, 15 Jul 2018 23:46:36 +0000 (23:46 +0000)]
[x86/SLH] Extract one of the bits of logic to its own function. NFC.

This is just a refactoring to start cleaning up the code here and make
it more readable and approachable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337138 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add custom execution domain fixing for 128/256-bit integer logic operations...
Craig Topper [Sun, 15 Jul 2018 23:32:36 +0000 (23:32 +0000)]
[X86] Add custom execution domain fixing for 128/256-bit integer logic operations with AVX512F, but not AVX512DQ.

AVX512F only has integer domain logic instructions. AVX512DQ added FP domain logic instructions.

Execution domain fixing runs before EVEX->VEX. So if we have AVX512F and not AVX512DQ we fail to do execution domain switching of the logic operations. This leads to mismatches in execution domain and more test differences.

This patch adds custom domain fixing that switches EVEX integer logic operations to VEX fp logic operations if XMM16-31 are not used.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337137 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add load patterns for cases where we select X86Movss/X86Movsd to blend instruct...
Craig Topper [Sun, 15 Jul 2018 21:49:01 +0000 (21:49 +0000)]
[X86] Add load patterns for cases where we select X86Movss/X86Movsd to blend instructions.

This allows us to fold the load during isel without waiting for the peephole pass to do it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337136 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Use 128-bit blends instead vmovss/vmovsd for 512-bit vzmovl patterns to match...
Craig Topper [Sun, 15 Jul 2018 18:51:08 +0000 (18:51 +0000)]
[X86] Use 128-bit blends instead vmovss/vmovsd for 512-bit vzmovl patterns to match AVX.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337135 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Use 128-bit ops for 256-bit vzmovl patterns.
Craig Topper [Sun, 15 Jul 2018 18:51:07 +0000 (18:51 +0000)]
[X86] Use 128-bit ops for 256-bit vzmovl patterns.

128-bit ops implicitly zero the upper bits. This should address the comment about domain crossing for the integer version without AVX2 since we can use a 128-bit VBLENDW without AVX2.

The only bad thing I see here is that we failed to reuse an vxorps in some of the tests, but I think that's already known issue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337134 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[DAGCombiner] fix typo in comment; NFC
Sanjay Patel [Sun, 15 Jul 2018 17:09:35 +0000 (17:09 +0000)]
[DAGCombiner] fix typo in comment; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337132 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Corrections in comments for division transformation (NFC)
Sanjay Patel [Sun, 15 Jul 2018 17:06:59 +0000 (17:06 +0000)]
[InstCombine] Corrections in comments for division transformation (NFC)

The actual code seems to be correct, but the comments were misleading.

Patch by Aaron Puchert!

Differential Revision: https://reviews.llvm.org/D49276

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337131 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[DAGCombiner] extend(ifpositive(X)) -> shift-right (not X)
Sanjay Patel [Sun, 15 Jul 2018 16:27:07 +0000 (16:27 +0000)]
[DAGCombiner] extend(ifpositive(X)) -> shift-right (not X)

This is almost the same as an existing IR canonicalization in instcombine,
so I'm assuming this is a good early generic DAG combine too.

The motivation comes from reduced bit-hacking for select-of-constants in IR
after rL331486. We want to restore that functionality in the DAG as noted in
the commit comments for that change and the llvm-dev discussion here:
http://lists.llvm.org/pipermail/llvm-dev/2018-July/124433.html

The PPC and AArch tests show that those targets are already doing something
similar. x86 will be neutral in the minimal case and generally better when
this pattern is extended with other ops as shown in the signbit-shift.ll tests.

Note the asymmetry: we don't include the (extend (ifneg X)) transform because
it already exists in SimplifySelectCC(), and that is verified in the later
unchanged tests in the signbit-shift.ll files. Without the 'not' op, the
general transform to use a shift is always a win because that's a single
instruction.

Alive proofs:
https://rise4fun.com/Alive/ysli

Name: if pos, get -1
  %c = icmp sgt i16 %x, -1
  %r = sext i1 %c to i16
  =>
  %n = xor i16 %x, -1
  %r = ashr i16 %n, 15

Name: if pos, get 1
  %c = icmp sgt i16 %x, -1
  %r = zext i1 %c to i16
  =>
  %n = xor i16 %x, -1
  %r = lshr i16 %n, 15

Differential Revision: https://reviews.llvm.org/D48970

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337130 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstSimplify] add fixme comment for PR37776; NFC
Sanjay Patel [Sun, 15 Jul 2018 16:13:58 +0000 (16:13 +0000)]
[InstSimplify] add fixme comment for PR37776; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337129 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AMDGPU] adjusted test checks because minnum with NaN gets simplified
Sanjay Patel [Sun, 15 Jul 2018 15:14:40 +0000 (15:14 +0000)]
[AMDGPU] adjusted test checks because minnum with NaN gets simplified

This was improved with rL337127, but I missed the failure in this test.
I'm not sure what the expected result will be, so I've generalized it
and added a FIXME comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337128 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstSimplify] fold minnum/maxnum with NaN arg
Sanjay Patel [Sun, 15 Jul 2018 14:52:16 +0000 (14:52 +0000)]
[InstSimplify] fold minnum/maxnum with NaN arg

This fold is repeated/misplaced in instcombine, but I'm
not sure if it's safe to remove that yet because some
other folds appear to be asserting that the transform
has occurred within instcombine itself.

This isn't the best fix for PR37776, but it probably
hides the bug with the given code example:
https://bugs.llvm.org/show_bug.cgi?id=37776

We have another test to demonstrate the more general bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337127 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstSimplify] add tests for minnum/maxnum; NFC
Sanjay Patel [Sun, 15 Jul 2018 14:46:48 +0000 (14:46 +0000)]
[InstSimplify] add tests for minnum/maxnum; NFC

This isn't the best fix for PR37776, but it probably
hides the bug with the given code example:
https://bugs.llvm.org/show_bug.cgi?id=37776

We have another test to demonstrate the more general
bug.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337126 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-mca] Regenerate X86 specific tests. NFC
Andrea Di Biagio [Sun, 15 Jul 2018 11:43:11 +0000 (11:43 +0000)]
[llvm-mca] Regenerate X86 specific tests. NFC

Not all tests were correctly updated by the update script after r336797.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337124 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-mca][BtVer2] teach how to identify false dependencies on partially written
Andrea Di Biagio [Sun, 15 Jul 2018 11:01:38 +0000 (11:01 +0000)]
[llvm-mca][BtVer2] teach how to identify false dependencies on partially written
registers.

The goal of this patch is to improve the throughput analysis in llvm-mca for the
case where instructions perform partial register writes.

On x86, partial register writes are quite difficult to model, mainly because
different processors tend to implement different register merging schemes in
hardware.

When the code contains partial register writes, the IPC (instructions per
cycles) estimated by llvm-mca tends to diverge quite significantly from the
observed IPC (using perf).

Modern AMD processors (at least, from Bulldozer onwards) don't rename partial
registers. Quoting Agner Fog's microarchitecture.pdf:
" The processor always keeps the different parts of an integer register together.
For example, AL and AH are not treated as independent by the out-of-order
execution mechanism. An instruction that writes to part of a register will
therefore have a false dependence on any previous write to the same register or
any part of it."

This patch is a first important step towards improving the analysis of partial
register updates. It changes the semantic of RegisterFile descriptors in
tablegen, and teaches llvm-mca how to identify false dependences in the presence
of partial register writes (for more details: see the new code comments in
include/Target/TargetSchedule.h - class RegisterFile).

This patch doesn't address the case where a write to a part of a register is
followed by a read from the whole register.  On Intel chips, high8 registers
(AH/BH/CH/DH)) can be stored in separate physical registers. However, a later
(dirty) read of the full register (example: AX/EAX) triggers a merge uOp, which
adds extra latency (and potentially affects the pipe usage).
This is a very interesting article on the subject with a very informative answer
from Peter Cordes:
https://stackoverflow.com/questions/45660139/how-exactly-do-partial-registers-on-haswell-skylake-perform-writing-al-seems-to

In future, the definition of RegisterFile can be extended with extra information
that may be used to identify delays caused by merge opcodes triggered by a dirty
read of a partial write.

Differential Revision: https://reviews.llvm.org/D49196

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337123 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[AVR] Document some public functions
Dylan McKay [Sun, 15 Jul 2018 07:24:27 +0000 (07:24 +0000)]
[AVR] Document some public functions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337122 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[TableGen] std::move vectors into TreePatternNode.
Craig Topper [Sun, 15 Jul 2018 06:52:49 +0000 (06:52 +0000)]
[TableGen] std::move vectors into TreePatternNode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337121 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[TableGen] Remove what seems to be an unnecessary std::map copy.
Craig Topper [Sun, 15 Jul 2018 06:52:48 +0000 (06:52 +0000)]
[TableGen] Remove what seems to be an unnecessary std::map copy.

The comment says the copy was made so it could be destroyed in the following loop, but the original map wasn't used after the loop.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337120 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Add some optsize patterns for 256-bit X86vzmovl.
Craig Topper [Sun, 15 Jul 2018 06:03:19 +0000 (06:03 +0000)]
[X86] Add some optsize patterns for 256-bit X86vzmovl.

These patterns use VMOVSS/SD. Without optsize we use BLENDI instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337119 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[CMake] Pass CMAKE_INSTALL_DO_STRIP to external projects
Petr Hosek [Sun, 15 Jul 2018 02:12:25 +0000 (02:12 +0000)]
[CMake] Pass CMAKE_INSTALL_DO_STRIP to external projects

This is necessary to make install-<target>-stripped work for
external projects such as runtimes.

Differential Revision: https://reviews.llvm.org/D49335

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337115 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[TableGen] Add some std::move to the PatternToMatch constructor.
Craig Topper [Sun, 15 Jul 2018 01:10:28 +0000 (01:10 +0000)]
[TableGen] Add some std::move to the PatternToMatch constructor.

The are two vectors passed by value to the constructor. We should be able to move them into the object.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337114 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[llvm-mca] Turn InstructionTables into a Stage.
Matt Davis [Sat, 14 Jul 2018 23:52:50 +0000 (23:52 +0000)]
[llvm-mca] Turn InstructionTables into a Stage.

Summary:
This patch converts the InstructionTables class into a subclass of mca::Stage.  This change allows us to use the Stage's inherited Listeners for event notifications.  This also allows us to create a simple pipeline for viewing the InstructionTables report.

I have been working on a follow on patch that should cleanup addView in InstructionTables.  Right now, addView adds the view to both the Listener list and Views list.  The follow-on patch addresses the fact that we don't really need two lists in this case.  That change is not specific to just InstructionTables, so it will be a separate patch.

Reviewers: andreadb, courbet, RKSimon

Reviewed By: andreadb

Subscribers: tschuett, gbedwell, llvm-commits

Differential Revision: https://reviews.llvm.org/D49329

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337113 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] foldICmpWithLowBitMaskedVal(): update comments.
Roman Lebedev [Sat, 14 Jul 2018 20:08:52 +0000 (20:08 +0000)]
[NFC][InstCombine] foldICmpWithLowBitMaskedVal(): update comments.

All predicates are handled.
There does not seem to be any other possible folds here.
There are some more folds possible with inverted mask though.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337112 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x & (-1 >> y) s< x to x s> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:47 +0000 (20:08 +0000)]
[InstCombine] Fold  x & (-1 >> y) s< x  to  x s> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337111 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) s< x to x s> (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:42 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) s< x  to  x s> (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337110 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x & (-1 >> y) s>= x to x s<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:37 +0000 (20:08 +0000)]
[InstCombine] Fold  x & (-1 >> y) s>= x  to  x s<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337109 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) s>= x to x s<= (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:31 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) s>= x  to  x s<= (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337108 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x s<= x & (-1 >> y) to x s<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:26 +0000 (20:08 +0000)]
[InstCombine] Fold  x s<= x & (-1 >> y)  to  x s<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337107 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x s<= x & (-1 >> y) to x s<= (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:21 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x s<= x & (-1 >> y)  to  x s<= (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337106 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x s> x & (-1 >> y) to x s> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 20:08:16 +0000 (20:08 +0000)]
[InstCombine] Fold  x s> x & (-1 >> y)  to  x s> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337105 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x s> x & (-1 >> y) to x s> (-1 >> y) fold.
Roman Lebedev [Sat, 14 Jul 2018 20:08:09 +0000 (20:08 +0000)]
[NFC][InstCombine] Tests for  x s> x & (-1 >> y)  to  x s> (-1 >> y)  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/I3O

This pattern is not commutative!
We must make sure not to fold the commuted version!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337104 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x u<= x & C to x u<= C
Roman Lebedev [Sat, 14 Jul 2018 16:44:54 +0000 (16:44 +0000)]
[InstCombine] Fold  x u<= x & C  to  x u<= C

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/Fqp

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337102 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x u<= x & C to x u<= C fold.
Roman Lebedev [Sat, 14 Jul 2018 16:44:48 +0000 (16:44 +0000)]
[NFC][InstCombine] Tests for  x u<= x & C  to  x u<= C  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/Fqp

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337101 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x u> x & C to x u> C
Roman Lebedev [Sat, 14 Jul 2018 16:44:43 +0000 (16:44 +0000)]
[InstCombine] Fold  x u> x & C  to  x u> C

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/JvS

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337100 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x u> x & C to x u> C fold.
Roman Lebedev [Sat, 14 Jul 2018 16:44:37 +0000 (16:44 +0000)]
[NFC][InstCombine] Tests for  x u> x & C  to  x u> C  fold.

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/JvS

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337099 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x & (-1 >> y) u< x to x u> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:16 +0000 (12:20 +0000)]
[InstCombine] Fold  x & (-1 >> y) u< x  to  x u> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/ocb

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337098 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) u< x to x u> (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:11 +0000 (12:20 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) u< x  to  x u> (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/ocb

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337097 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[InstCombine] Fold x & (-1 >> y) u>= x to x u<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:06 +0000 (12:20 +0000)]
[InstCombine] Fold  x & (-1 >> y) u>= x  to  x u<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/azI

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337096 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Tests for x & (-1 >> y) u>= x to x u<= (-1 >> y)
Roman Lebedev [Sat, 14 Jul 2018 12:20:01 +0000 (12:20 +0000)]
[NFC][InstCombine] Tests for  x & (-1 >> y) u>= x  to  x u<= (-1 >> y)

https://bugs.llvm.org/show_bug.cgi?id=38123
https://rise4fun.com/Alive/azI

This pattern is not commutative. But InstSimplify will
already have taken care of the 'commutative' variant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337095 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[NFC][InstCombine] Add forgotten variable tests for foldICmpWithLowBitMaskedVal()
Roman Lebedev [Sat, 14 Jul 2018 12:19:56 +0000 (12:19 +0000)]
[NFC][InstCombine] Add forgotten variable tests for foldICmpWithLowBitMaskedVal()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337094 91177308-0d34-0410-b5e6-96231b3b80d8

6 years agoAttempt to get test/tools/llvm-lib/help.test passing on sanitizer-x86_64-linux-fast
Nico Weber [Sat, 14 Jul 2018 11:33:33 +0000 (11:33 +0000)]
Attempt to get test/tools/llvm-lib/help.test passing on sanitizer-x86_64-linux-fast

The bot has a /b directory, so /? matches against that and gets expanded to it.

(Thanks to Hans's r187366, which solved the same problem for clang-cl a while
ago and which saved me much head scratching.)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337092 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[MachineOutliner] Check the last instruction from the sequence when updating liveness
Francis Visoiu Mistrih [Sat, 14 Jul 2018 09:40:01 +0000 (09:40 +0000)]
[MachineOutliner] Check the last instruction from the sequence when updating liveness

The MachineOutliner was doing an std::for_each from the call (inserted
before the outlined sequence) to the iterator at the end of the
sequence.

std::for_each needs the iterator past the end, so the last instruction
was not taken into account when propagating the liveness information.

This fixes the machine verifier issue in machine-outliner-disubprogram.ll.

Differential Revision: https://reviews.llvm.org/D49295

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337090 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[x86/SLH] Fix an issue where we wouldn't harden any loads if we found
Chandler Carruth [Sat, 14 Jul 2018 09:32:37 +0000 (09:32 +0000)]
[x86/SLH] Fix an issue where we wouldn't harden any loads if we found
no conditions.

This is only valid to do if we're hardening calls and rets with LFENCE
which results in an LFENCE guarding the entire entry block for us.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337089 91177308-0d34-0410-b5e6-96231b3b80d8

6 years ago[X86] Fix a subtle bug in the custom execution domain fixing for blends.
Craig Topper [Sat, 14 Jul 2018 06:30:30 +0000 (06:30 +0000)]
[X86] Fix a subtle bug in the custom execution domain fixing for blends.

The code tried to find the immediate by using getNumOperands() on the MachineInstr, but there might be implicit-defs after the immediate that get counted.

Instead use getNumOperands() from the instruction description which will only count the operands that are defined in the td file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@337088 91177308-0d34-0410-b5e6-96231b3b80d8