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5 years ago[MemorySSA & LoopPassManager] Add remaining book keeping [NFCI].
Alina Sbirlea [Tue, 12 Feb 2019 23:48:02 +0000 (23:48 +0000)]
[MemorySSA & LoopPassManager] Add remaining book keeping [NFCI].

Add plumbing to get MemorySSA in the remaining loop passes.
Also update unit test to add the dependency.
[EnableMSSALoopDependency remains disabled].

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353901 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU: Try to use function specific ST
Matt Arsenault [Tue, 12 Feb 2019 23:44:13 +0000 (23:44 +0000)]
AMDGPU: Try to use function specific ST

Subtargets are a function level property, so ideally we would
eliminate everywhere that needs to check the global one. Rename the
function to try avoiding confusion.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353900 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU: Ignore CodeObjectV3 when inlining
Matt Arsenault [Tue, 12 Feb 2019 23:30:11 +0000 (23:30 +0000)]
AMDGPU: Ignore CodeObjectV3 when inlining

This was inhibiting inlining of library functions when clang was
invoking the inliner directly. This is covering a bit of a mess with
subtarget feature handling, and this shouldn't be a subtarget
feature. The behavior is different depending on whether you are using
a -mattr flag in clang, or llc, opt.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353899 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SystemZ] Remember to cast value to void to disable warning.
Jonas Paulsson [Tue, 12 Feb 2019 23:13:18 +0000 (23:13 +0000)]
[SystemZ]  Remember to cast value to void to disable warning.

Hopefully fixes buildbot problems.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353898 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LICM] Cap the clobbering calls in LICM.
Alina Sbirlea [Tue, 12 Feb 2019 23:05:40 +0000 (23:05 +0000)]
[LICM] Cap the clobbering calls in LICM.

Summary:
Unlimitted number of calls to getClobberingAccess can lead to high
compile times in pathological cases.
Switching EnableLicmCap flag from bool to int, and enabling to default 100.
(tested to be appropriate for current bechmarks)
We can revisit this value when enabling MemorySSA.

Reviewers: sanjoy, chandlerc, george.burgess.iv

Subscribers: jlebar, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57968

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353897 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Tests] A few more live-in deopt lowering tests
Philip Reames [Tue, 12 Feb 2019 23:00:07 +0000 (23:00 +0000)]
[Tests] A few more live-in deopt lowering tests

Nothing super interesting, just making sure obvious cases work.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353895 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU/NFC: Remove SubtargetFeatureISAVersion since it is not used anywhere
Konstantin Zhuravlyov [Tue, 12 Feb 2019 22:49:49 +0000 (22:49 +0000)]
AMDGPU/NFC: Remove SubtargetFeatureISAVersion since it is not used anywhere

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353892 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU: Remove duplicate processor (gfx900)
Konstantin Zhuravlyov [Tue, 12 Feb 2019 22:29:25 +0000 (22:29 +0000)]
AMDGPU: Remove duplicate processor (gfx900)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353889 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[gn build] Separate debug and optimization settings
David Major [Tue, 12 Feb 2019 22:24:45 +0000 (22:24 +0000)]
[gn build] Separate debug and optimization settings

This patch adds an `is_optimized` variable, orthogonal to `is_debug`, to allow for a gn analogue to `RelWithDebInfo` builds.

As part of this we'll want to explicitly enable GC+ICF, for the sake of `is_debug && is_optimized` builds. The flags normally default to true except that if you pass `/DEBUG` they default to false.

Differential Revision: https://reviews.llvm.org/D58075

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353888 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SelectionDAG] Clean up comments in SelectionDAGBuilder.h. NFC
Bjorn Pettersson [Tue, 12 Feb 2019 22:11:20 +0000 (22:11 +0000)]
[SelectionDAG] Clean up comments in SelectionDAGBuilder.h. NFC

Remove redundant function/variable names from doxygen
comments (as suggested in https://reviews.llvm.org/D57697).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353886 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoFix auto-upgrade for the new parameter to llvm.objectsize
Erik Pilkington [Tue, 12 Feb 2019 21:55:38 +0000 (21:55 +0000)]
Fix auto-upgrade for the new parameter to llvm.objectsize

r352664 added a 'dynamic' parameter to objectsize, but the AutoUpgrade
changes were incomplete. Also, fix an off-by-one error I made in the
upgrade logic that is now no longer unreachable.

Differential revision: https://reviews.llvm.org/D58071

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353884 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[ConstProp] add test for miscompile from bitcast transform; NFC
Sanjay Patel [Tue, 12 Feb 2019 21:49:56 +0000 (21:49 +0000)]
[ConstProp] add test for miscompile from bitcast transform; NFC

This problem goes with the fix in D51215.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353883 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-dwp] Use color-formatted error reporting
Jordan Rupprecht [Tue, 12 Feb 2019 20:37:33 +0000 (20:37 +0000)]
[llvm-dwp] Use color-formatted error reporting

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353876 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoFix undefined behaviour in PPCInstPrinter::printBranchOperand.
Sean Fertile [Tue, 12 Feb 2019 20:03:04 +0000 (20:03 +0000)]
Fix undefined behaviour in PPCInstPrinter::printBranchOperand.

Fix the undefined behaviour introduced by my previous patch r353865 (left
shifting a potentially negative value), which was caught by the bots that run
UBSan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353874 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-dwp] Avoid writing the output dwp file when there is an error
Jordan Rupprecht [Tue, 12 Feb 2019 20:00:51 +0000 (20:00 +0000)]
[llvm-dwp] Avoid writing the output dwp file when there is an error

Summary: Use ToolOutputFile to clean up the output file unless dwp actually finishes successfully.

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: jdoerfert, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58130

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353873 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64] Expand v8i8 cttz (PR39729)
Nikita Popov [Tue, 12 Feb 2019 18:55:53 +0000 (18:55 +0000)]
[AArch64] Expand v8i8 cttz (PR39729)

Fix for https://bugs.llvm.org/show_bug.cgi?id=39729.

Rather than adding just a case for v8i8 I'm setting cttz to expand
for all vector types.

Differential Revision: https://reviews.llvm.org/D58008

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353872 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InlineSpiller] Fix a crash due to lack of forward progress from remat (try 2)
Philip Reames [Tue, 12 Feb 2019 18:33:01 +0000 (18:33 +0000)]
[InlineSpiller] Fix a crash due to lack of forward progress from remat (try 2)

This is a recommit of r335091 Add more test cases for deopt-operands via regalloc, and r335077 [InlineSpiller] Fix a crash due to lack of forward progress from remat specifically for STATEPOINT.  They were reverted due to a crash.

This change includes the text of both original changes, but also includes three aditional pieces:
1) A bug fix for the observed crash.  I had failed to record the failed remat value as live which resulted in an instruction being deleted which still had uses.  With the machine verifier, this is caught quickly.  Without it, we fail in StackSlotColoring due to an empty live interval from LiveStack.
2) A test case which demonstrates the fix for (1).  See @test11.
3) A control flag which defaults to disabling this for the moment.  Once I've run more extensive validaton, I will switch the default and then remove this flag.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353871 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SystemZ] Use VGM whenever possible to load FP immediates.
Jonas Paulsson [Tue, 12 Feb 2019 18:06:06 +0000 (18:06 +0000)]
[SystemZ]  Use VGM whenever possible to load FP immediates.

isFPImmLegal() has been extended to recognize certain FP immediates that can
be built with VGM (Vector Generate Mask).

These scalar FP immediates (that were previously loaded from the constant
pool) are now selected as VGMF/VGMG in Select().

Review: Ulrich Weigand
https://reviews.llvm.org/D58003

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353867 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[PowerPC] Fix printing of negative offsets in call instruction dissasembly.
Sean Fertile [Tue, 12 Feb 2019 17:48:22 +0000 (17:48 +0000)]
[PowerPC] Fix printing of negative offsets in call instruction dissasembly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353865 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[GlobalISel][NFC] Gardening: Make translateSimpleUnaryIntrinsic general
Jessica Paquette [Tue, 12 Feb 2019 17:38:34 +0000 (17:38 +0000)]
[GlobalISel][NFC] Gardening: Make translateSimpleUnaryIntrinsic general

Instead of only having this code work for unary intrinsics, have it work for
an arbitrary number of parameters.

Factor out the cases that fall under this (fma, pow).

This makes it a bit easier to add more intrinsics which don't require any
special work.

Differential Revision: https://reviews.llvm.org/D58079

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353863 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[tablegen] Add locations to many PrintFatalError() calls
Daniel Sanders [Tue, 12 Feb 2019 17:36:57 +0000 (17:36 +0000)]
[tablegen] Add locations to many PrintFatalError() calls

Summary:
While working on the GISel Combiner, I noticed I was producing location-less
error messages fairly often and set about fixing this. In the process, I
noticed quite a few places elsewhere in TableGen that also neglected to include
a relevant location.

This patch adds locations to errors that relate to a specific record (or a
field within it) and also have easy access to the relevant location. This is
particularly useful when multiclasses are involved as many of these errors
refer to the full name of a record and it's difficult to guess which substring
is grep-able.

Unfortunately, tablegen currently only supports Record granularity so it's not
currently possible to point at a specific Init so these sometimes point at the
record that caused the error rather than the precise origin of the error.

Reviewers: bogner, aditya_nandakumar, volkan, aemerson, paquette, nhaehnle

Reviewed By: nhaehnle

Subscribers: jdoerfert, nhaehnle, asb, rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58077

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353862 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[GlobalISel][AArch64] Select llvm.bswap* for non-vector types
Jessica Paquette [Tue, 12 Feb 2019 17:28:17 +0000 (17:28 +0000)]
[GlobalISel][AArch64] Select llvm.bswap* for non-vector types

This teaches the IRTranslator to emit G_BSWAP when it runs into
Intrinsic::bswap. This allows us to select G_BSWAP for non-vector types in
AArch64.

Add a select-bswap.mir test, and add global isel checks to a couple existing
tests in test/CodeGen/AArch64.

This doesn't handle every bswap case, since some of these rely on known bits
stuff. This just lets us handle the naive case.

Differential Revision: https://reviews.llvm.org/D58081

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353861 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86][AVX] Enable shuffle combining support for zero_extend
Simon Pilgrim [Tue, 12 Feb 2019 17:22:35 +0000 (17:22 +0000)]
[X86][AVX] Enable shuffle combining support for zero_extend

A more limited version of rL352997 that had to be disabled in rL353198 - allow extension of any 128/256/512 bit vector that at least uses byte sized scalars.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353860 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DAGCombiner] convert logic-of-setcc into bit magic (PR40611)
Sanjay Patel [Tue, 12 Feb 2019 17:07:47 +0000 (17:07 +0000)]
[DAGCombiner] convert logic-of-setcc into bit magic (PR40611)

If we're comparing some value for equality against 2 constants
and those constants have an absolute difference of just 1 bit,
then we can offset and mask off that 1 bit and reduce to a single
compare against zero:
         and/or (setcc X, C0, ne), (setcc X, C1, ne/eq) -->
         setcc ((add X, -C1), ~(C0 - C1)), 0, ne/eq

https://rise4fun.com/Alive/XslKj

This transform is disabled by default using a TLI hook
("convertSetCCLogicToBitwiseLogic()").

That should be overridden for AArch64, MIPS, Sparc and possibly
others based on the asm shown in:
https://bugs.llvm.org/show_bug.cgi?id=40611

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353859 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[x86] add negative tests for setcc folds; NFC
Sanjay Patel [Tue, 12 Feb 2019 16:44:37 +0000 (16:44 +0000)]
[x86] add negative tests for setcc folds; NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353855 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SelectionDAG] Fix return calling convention in expansion of ?MULO
whitequark [Tue, 12 Feb 2019 16:41:50 +0000 (16:41 +0000)]
[SelectionDAG] Fix return calling convention in expansion of ?MULO

Summary:
The SMULO/UMULO DAG nodes, when not directly supported by the target,
expand to a multiplication twice as wide. In case that the resulting
type is not legal, the legalizer cannot directly call the intrinsic
with the wide arguments; instead, it "pre-lowers" them by splitting
them in halves.

rL283203 made sure that on big endian targets, the legalizer passes
the argument halves in the correct order. It did not do the same
for the return value halves because the existing code used a hack;
it put an illegal type into DAG and hoped that nothing would break
and it would be correctly lowered elsewhere.

rL307207 fixed this, handling return value halves similar to how
argument handles are handled, but did not take big-endian targets
into account.

This commit fixes the expansion on big-endian targets, such as
the out-of-tree OR1K target.

Reviewers: eli.friedman, vadimcn

Subscribers: george-hopkins, efriedma, llvm-commits

Differential Revision: https://reviews.llvm.org/D45355

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353854 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MCA] Improved debug prints. NFC
Andrea Di Biagio [Tue, 12 Feb 2019 16:18:57 +0000 (16:18 +0000)]
[MCA] Improved debug prints. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353852 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[PowerPC] Regenerate test
Simon Pilgrim [Tue, 12 Feb 2019 16:10:50 +0000 (16:10 +0000)]
[PowerPC] Regenerate test

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353851 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU/GlobalISel: Add more insert/extract testcases
Matt Arsenault [Tue, 12 Feb 2019 15:04:03 +0000 (15:04 +0000)]
AMDGPU/GlobalISel: Add more insert/extract testcases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353848 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Codegen] Make sure kill flags are not incorrect from removed machine phi's
David Green [Tue, 12 Feb 2019 15:02:57 +0000 (15:02 +0000)]
[Codegen] Make sure kill flags are not incorrect from removed machine phi's

We need to clear the kill flags on both SingleValReg and OldReg, to ensure they remain
conservatively correct.

Differential Revision: https://reviews.llvm.org/D58114

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353847 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-dwp] Abort when dwo_id is unset
Jordan Rupprecht [Tue, 12 Feb 2019 15:01:07 +0000 (15:01 +0000)]
[llvm-dwp] Abort when dwo_id is unset

Summary:
An empty dwo_id indicates a degenerate .dwo file that should not have been generated in the first place. Instead of discovering this error later when merging with another degenerate .dwo file, print an error immediately when noticing an unset dwo_id, including the filename of the offending file.

Test case created by compiling a trivial file w/ `-fno-split-dwarf-inlining -gmlt -gsplit-dwarf -c` prior to r353771

Reviewers: dblaikie

Reviewed By: dblaikie

Subscribers: jdoerfert, aprantl, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58085

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353846 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAMDGPU/GlobalISel: Only make f16 constants legal on f16 targets
Matt Arsenault [Tue, 12 Feb 2019 14:54:55 +0000 (14:54 +0000)]
AMDGPU/GlobalISel: Only make f16 constants legal on f16 targets

We could deal with it, but there's no real point.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353845 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Use default rounding mode when extending fconstant
Matt Arsenault [Tue, 12 Feb 2019 14:54:54 +0000 (14:54 +0000)]
GlobalISel: Use default rounding mode when extending fconstant

I don't think this matters since the values should all be exactly
representable.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353844 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Move some more legalize cases into functions
Matt Arsenault [Tue, 12 Feb 2019 14:54:52 +0000 (14:54 +0000)]
GlobalISel: Move some more legalize cases into functions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353843 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LoopSimplifyCFG] Fix test broken in release mode in r353813
Sam McCall [Tue, 12 Feb 2019 14:43:30 +0000 (14:43 +0000)]
[LoopSimplifyCFG] Fix test broken in release mode in r353813

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353842 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[NFC] Simplify code & reduce nest slightly
Max Kazantsev [Tue, 12 Feb 2019 11:31:46 +0000 (11:31 +0000)]
[NFC] Simplify code & reduce nest slightly

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353832 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DebugInfo] Don't salvage load operations (PR40628).
Jeremy Morse [Tue, 12 Feb 2019 10:54:30 +0000 (10:54 +0000)]
[DebugInfo] Don't salvage load operations (PR40628).

Salvaging a redundant load instruction into a debug expression hides a
memory read from optimisation passes. Passes that alter memory behaviour
(such as LICM promoting memory to a register) aren't aware of these debug
memory reads and leave them unaltered, making the debug variable location
point somewhere unsafe.

Teaching passes to know about these debug memory reads would be challenging
and probably incomplete. Finding dbg.value instructions that need to be fixed
would likely be computationally expensive too, as more analysis would be
required. It's better to not generate debug-memory-reads instead, alas.

Changed tests:
 * DeadStoreElim: test for salvaging of intermediate operations contributing
   to the dead store, instead of salvaging of the redundant load,
 * GVN: remove debuginfo behaviour checks completely, this behaviour is still
   covered by other tests,
 * InstCombine: don't test for salvaged loads, we're removing that behaviour.

Differential Revision: https://reviews.llvm.org/D57962

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353824 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DebugInfo] Keep parameter DBG_VALUEs before prologue code
David Stenberg [Tue, 12 Feb 2019 10:51:27 +0000 (10:51 +0000)]
[DebugInfo] Keep parameter DBG_VALUEs before prologue code

Summary:
This is a preparatory change for removing the code from
DebugHandlerBase::beginFunction() which changes the starting label for
the first non-overlapping DBG_VALUEs of parameters to the beginning of
the function. It does that to be able to show parameters when entering a
function. However, that code does not consider what defines the values,
which can result in the ranges for the debug values starting before
their defining instructions. That code is removed in a follow-up patch.

When prologue code is inserted, it leads to DBG_VALUEs that start
directly in the entry block being moved down after the prologue
instructions. This patch fixes that by stashing away DBG_VALUEs for
parameters before emitting the prologue, and then reinserts them at the
start of the block. This assumes that there is no target that somehow
clobbers parameter registers in the frame setup; there is no such case
in the lit tests at least.

See PR40188 for more information.

Reviewers: aprantl, dblaikie, rnk, jmorse

Reviewed By: aprantl

Subscribers: bjope, llvm-commits

Tags: #debug-info

Differential Revision: https://reviews.llvm.org/D57510

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353823 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[IndVars] Fix corner case with unreachable Phi inputs. PR40454
Max Kazantsev [Tue, 12 Feb 2019 09:59:44 +0000 (09:59 +0000)]
[IndVars] Fix corner case with unreachable Phi inputs. PR40454

Logic in `getInsertPointForUses` doesn't account for a corner case when `Def`
only comes to a Phi user from unreachable blocks. In this case, the incoming
value may be arbitrary (and not even available in the input block) and break
the loop-related invariants that are asserted below.

In fact, if we encounter this situation, no IR modification is needed. This
Phi will be simplified away with nearest cleanup.

Differential Revision: https://reviews.llvm.org/D58045
Reviewed By: spatel

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353816 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-readobj] Only allow 4-byte pr_data
Fangrui Song [Tue, 12 Feb 2019 09:56:01 +0000 (09:56 +0000)]
[llvm-readobj] Only allow 4-byte pr_data

Summary: AMD64 psABI says: "The pr_data field of each property contains a 4-byte unsigned integer." Thus we don't need to handle 8-byte pr_data.

Reviewers: mike.dvoretsky, grimar, craig.topper, xiangzhangllvm, hjl.tools

Reviewed By: grimar

Subscribers: rupprecht, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D58103

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353815 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-readobj] - Simplify .gnu.version_r dumping a bit.
George Rimar [Tue, 12 Feb 2019 09:50:04 +0000 (09:50 +0000)]
[llvm-readobj] - Simplify .gnu.version_r dumping a bit.

Current implementation takes "Number of needed versions" from DT_VERNEEDNUM
dynamic tag entry. Though it would be a bit simpler to take it from sh_info
section header field directly:
https://docs.oracle.com/cd/E19683-01/816-1386/chapter6-94076/index.html

Differential revision: https://reviews.llvm.org/D58048

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353814 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LoopSimplifyCFG] Change logic of dead loops removal to avoid hitting asserts
Max Kazantsev [Tue, 12 Feb 2019 09:37:00 +0000 (09:37 +0000)]
[LoopSimplifyCFG] Change logic of dead loops removal to avoid hitting asserts

The function `LI.erase` has some invariants that need to be preserved when it
tries to remove a loop which is not the top-level loop. In particular, it
requires loop's preheader to be strictly in loop's parent. Our current logic
of deletion of dead blocks may erase the information about preheader before we
handle the loop, and therefore we may hit this assertion.

This patch changes the logic of loop deletion: we make them top-level loops
before we actually erase them. This allows us to trigger the simple branch of
`erase` logic which just detatches blocks from the loop and does not try to do
some complex stuff that need this invariant.

Thanks to @uabelho for reporting this!

Differential Revision: https://reviews.llvm.org/D57221
Reviewed By: fedor.sergeev

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353813 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[yaml2obj/obj2yaml] - Move `Info` field out from `Section` class.
George Rimar [Tue, 12 Feb 2019 09:08:59 +0000 (09:08 +0000)]
[yaml2obj/obj2yaml] - Move `Info` field out from `Section` class.

ELFYAML.h contains a `Section` class which is a base for a few other
sections classes that are used for mapping different section types.
`Section` has a `StringRef Info` field used for storing sh_info.

At the same time, sh_info has very different meanings for sections and
cannot be processed in a similar way generally,
for example ELFDumper does not handle it in `dumpCommonSection`
but do that in `dumpGroup` and `dumpCommonRelocationSection` respectively.

At this moment, we have and handle it as a string, because that was possible for
the current use case. But also it can simply be a number:
For SHT_GNU_verdef is "The number of version definitions within the section."

The patch moves `Info` field out to be able to have it as a number.
With that change, each class will be able to decide what type and purpose
of the sh_info field it wants to use.

I also had to edit 2 test cases. This is because patch fixes a bug. Previously we
accepted yaml files with Info fields for all sections (for example, for SHT_DYNSYM too).
But we do not handle it and the resulting objects had zero sh_info fields set for
such sections. Now it is accepted only for sections that supports it.

Differential revision: https://reviews.llvm.org/D58054

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353810 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoLibFuzzer.rst: double backticks
Hans Wennborg [Tue, 12 Feb 2019 09:08:52 +0000 (09:08 +0000)]
LibFuzzer.rst: double backticks

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353809 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoDelete blocks from DTU to avoid dangling pointers
Max Kazantsev [Tue, 12 Feb 2019 08:10:29 +0000 (08:10 +0000)]
Delete blocks from DTU to avoid dangling pointers

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353804 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LoopSimplifyCFG] Pay respect to LCSSA when removing dead blocks
Max Kazantsev [Tue, 12 Feb 2019 07:48:07 +0000 (07:48 +0000)]
[LoopSimplifyCFG] Pay respect to LCSSA when removing dead blocks

Utility function that we use for blocks deletion always unconditionally removes
one-input Phis. In LoopSimplifyCFG, it can lead to breach of LCSSA form.
This patch alters this function to keep them if needed.

Differential Revision: https://reviews.llvm.org/D57231
Reviewed By: fedor.sergeev

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353803 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[NFC] Rename DontDeleteUselessPHIs --> KeepOneInputPHIs
Max Kazantsev [Tue, 12 Feb 2019 07:09:29 +0000 (07:09 +0000)]
[NFC] Rename DontDeleteUselessPHIs --> KeepOneInputPHIs

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353801 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Statepoint Lowering] Update misleading comments about chains
Philip Reames [Tue, 12 Feb 2019 06:25:58 +0000 (06:25 +0000)]
[Statepoint Lowering] Update misleading comments about chains

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353800 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[NFC] Add parameter for keeping one-input Phis in DeleteDeadBlock(s)
Max Kazantsev [Tue, 12 Feb 2019 06:14:27 +0000 (06:14 +0000)]
[NFC] Add parameter for keeping one-input Phis in DeleteDeadBlock(s)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353799 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Collapse FP_TO_INT16_IN_MEM/FP_TO_INT32_IN_MEM/FP_TO_INT64_IN_MEM into a single...
Craig Topper [Tue, 12 Feb 2019 06:14:18 +0000 (06:14 +0000)]
[X86] Collapse FP_TO_INT16_IN_MEM/FP_TO_INT32_IN_MEM/FP_TO_INT64_IN_MEM into a single opcode using memory VT to distinquish. NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353798 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Remove the value type operand from the floating point load/store MemIntrinsicSD...
Craig Topper [Tue, 12 Feb 2019 06:14:16 +0000 (06:14 +0000)]
[X86] Remove the value type operand from the floating point load/store MemIntrinsicSDNodes. Use the MemoryVT instead. NFCI

We already have the memory VT, we can just match from that during isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353797 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[build] Remove a stray comment. NFC
Shoaib Meenai [Tue, 12 Feb 2019 02:25:27 +0000 (02:25 +0000)]
[build] Remove a stray comment. NFC

The CMake change associated with this comment was removed but the
comment got left behind. Add a newline instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353793 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[CMake] Don't override required compiler flags in the runtimes build
Petr Hosek [Tue, 12 Feb 2019 02:11:25 +0000 (02:11 +0000)]
[CMake] Don't override required compiler flags in the runtimes build

Ensure that HandleLLVMOptions adds all necessary required flags,
including -Wno-error when building with LLVM_ENABLE_WERROR enabled.

Differential Revision: https://reviews.llvm.org/D58092

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353790 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[x86] add tests for logic of setcc (PR40611); NFC
Sanjay Patel [Tue, 12 Feb 2019 01:46:30 +0000 (01:46 +0000)]
[x86] add tests for logic of setcc (PR40611); NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353789 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[PowerPC] add tests for logic of setcc (PR40611); NFC
Sanjay Patel [Tue, 12 Feb 2019 01:46:26 +0000 (01:46 +0000)]
[PowerPC] add tests for logic of setcc (PR40611); NFC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353788 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoFix r353771 to target linux only (split-dwarf isn't supported on macho)
David Blaikie [Tue, 12 Feb 2019 01:19:00 +0000 (01:19 +0000)]
Fix r353771 to target linux only (split-dwarf isn't supported on macho)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353785 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LoopReroll] Fix reroll root legality checking.
Eli Friedman [Tue, 12 Feb 2019 00:33:25 +0000 (00:33 +0000)]
[LoopReroll] Fix reroll root legality checking.

The code checked that the first root was an appropriate distance from
the base value, but skipped checking the other roots. This could lead to
rerolling a loop that can't be legally rerolled (at least, not without
rewriting the loop in a non-trivial way).

Differential Revision: https://reviews.llvm.org/D56812

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353779 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Test] Use autogenerated checks for more statepoint tests
Philip Reames [Tue, 12 Feb 2019 00:12:46 +0000 (00:12 +0000)]
[Test] Use autogenerated checks for more statepoint tests

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353776 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Tests] Fill out a few tests around gc relocation uniquing
Philip Reames [Tue, 12 Feb 2019 00:01:39 +0000 (00:01 +0000)]
[Tests] Fill out a few tests around gc relocation uniquing

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353773 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoDebugInfo: Split DWARF + gmlt + no-split-dwarf-inlining shouldn't emit anything to...
David Blaikie [Tue, 12 Feb 2019 00:00:38 +0000 (00:00 +0000)]
DebugInfo: Split DWARF + gmlt + no-split-dwarf-inlining shouldn't emit anything to the .dwo file

This configuration (due to r349207) was intended not to emit any DWO CU,
but a degenerate CU was still being emitted - containing a header and a
DW_TAG_compile_unit with no attributes.

Under that situation, emit nothing to the .dwo file. (since this is a
dynamic property of the input the .dwo file is still emitted, just with
nothing in it (so a valid, but empty, ELF file) - if some other CU
didn't satisfy this criteria, its DWO CU would still go there, etc)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353771 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[Test] Autogenerate a statepoint test and actual show the reload
Philip Reames [Mon, 11 Feb 2019 23:55:24 +0000 (23:55 +0000)]
[Test] Autogenerate a statepoint test and actual show the reload

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353770 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoBe conservative about unordered accesses for the moment
Philip Reames [Mon, 11 Feb 2019 23:34:33 +0000 (23:34 +0000)]
Be conservative about unordered accesses for the moment

Background: As described in https://reviews.llvm.org/D57601, I'm working towards separating volatile and atomic in the MMO uses for atomic instructions.

In https://reviews.llvm.org/D57593, I fixed a bug where isUnordered was returning the wrong result, but didn't account for the fact I was getting slightly ahead of myself. While both uses of isUnordered are correct (as far as I can tell), we don't have tests to demonstrate this and being aggressive gets in the way of having the removal of volatile truly be non-functional. Once D57601 lands, I will return to these call sites, revert this patch, and add the appropriate tests to show the expected behaviour.

Differential Revision: https://reviews.llvm.org/D57802

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353766 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[tblgen] Add a timer covering the time spent reading the Instruction defs
Daniel Sanders [Mon, 11 Feb 2019 23:02:02 +0000 (23:02 +0000)]
[tblgen] Add a timer covering the time spent reading the Instruction defs

This patch adds a -time-regions option to tablegen that can enable timers
(currently only one) that assess the performance of tablegen itself. This
can be useful for identifying scaling problems with tablegen backends.

This particular timer has allowed me to ignore time that is not attributed
the GISel combiner pass. It's useful by itself but it is particularly
useful in combination with https://reviews.llvm.org/D52954 which causes
this period of time to be annotated within Xcode Instruments which in turn
allows profile samples and recorded allocations attributed to reading
instructions to be filtered out.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353763 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Verify G_EXTRACT
Matt Arsenault [Mon, 11 Feb 2019 22:12:43 +0000 (22:12 +0000)]
GlobalISel: Verify G_EXTRACT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353759 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[TargetLibraryInfo] Update run time support for Windows
Evandro Menezes [Mon, 11 Feb 2019 22:12:01 +0000 (22:12 +0000)]
[TargetLibraryInfo] Update run time support for Windows

It seems that, since VC19, the `float` C99 math functions are supported for all
targets, unlike the C89 ones.

According to the discussion at https://reviews.llvm.org/D57625.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353758 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LegalizeTypes] Expand FNEG to bitwise op for IEEE FP types
Ana Pazos [Mon, 11 Feb 2019 22:10:08 +0000 (22:10 +0000)]
[LegalizeTypes] Expand FNEG to bitwise op for IEEE FP types

Summary:
Except for custom floating point types x86_fp80 and ppc_fp128,
expand Y = FNEG(X) to Y = X ^ sign mask to avoid library call.
 Using bitwise operation can improve code size and performance.

Reviewers: efriedma

Reviewed By: efriedma

Subscribers: efriedma, kpn, arsenm, eli.friedman, javed.absar, rbar, johnrusso, simoncook, sabuasal, niosHD, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, PkmX, jocewei, asb, llvm-commits

Differential Revision: https://reviews.llvm.org/D57875

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353757 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[IRReader] Expose getLazyIRModule
Scott Linder [Mon, 11 Feb 2019 22:01:13 +0000 (22:01 +0000)]
[IRReader] Expose getLazyIRModule

Currently there is no way to lazy-load an in-memory IR module without
first writing it to disk. This patch just exposes the existing
implementation of getLazyIRModule.

This is effectively a revert of rL212364

Differential Revision: https://reviews.llvm.org/D56203

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353755 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Implement moreElementsVector for implicit_def
Matt Arsenault [Mon, 11 Feb 2019 22:00:39 +0000 (22:00 +0000)]
GlobalISel: Implement moreElementsVector for implicit_def

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353754 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Fix not calling the observer when legalizing G_EXTRACT
Matt Arsenault [Mon, 11 Feb 2019 21:33:54 +0000 (21:33 +0000)]
GlobalISel: Fix not calling the observer when legalizing G_EXTRACT

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353750 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[globalisel] Correct string emitted by GISelChangeObserver::erasingInstr()
Daniel Sanders [Mon, 11 Feb 2019 20:45:19 +0000 (20:45 +0000)]
[globalisel] Correct string emitted by GISelChangeObserver::erasingInstr()

The API indicates that the MI is about to be erased rather than it has been erased.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353746 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Correct the memory operand for the FLD emitted in FP_TO_INTHelper for 32-bit...
Craig Topper [Mon, 11 Feb 2019 20:38:10 +0000 (20:38 +0000)]
[X86] Correct the memory operand for the FLD emitted in FP_TO_INTHelper for 32-bit SSE targets.

We were using DstTy, but that represents the integer type we are converting to which is i64 in this
case. The FLD is part of an intermediate step to get from the SSE registers to the x87 registers.
If the floating point type is f32, the memory operand should reflect a 4 byte access not an 8 byte
access. The store we used to get from SSE to the stack is using the corect size.

While there, consistenly use TheVT in place of Op.getOperand(0).getValueType() throughout the function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353745 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[llvm-cxxfilt] Split and demangle stdin input
Matt Davis [Mon, 11 Feb 2019 20:30:53 +0000 (20:30 +0000)]
[llvm-cxxfilt] Split and demangle stdin input

Summary:
Originally, llvm-cxxfilt would treat a line as a single mangled item to be demangled.
If a mangled name appears in the middle of that string, that name would not be demangled.

GNU c++filt  splits and demangles every word  in a  string that is piped to it via stdin.
Prior to this patch llvm-cxxfilt would never split strings  piped to it.
This patch replicates the GNU behavior and splits strings that are piped to it via stdin.

This fixes PR39990

Reviewers: compnerd, jhenderson, davide

Reviewed By: compnerd, jhenderson

Subscribers: erik.pilkington, jhenderson, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57350

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353743 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[globalisel] Restore comment explaining the nits of GISelChangeObserver::createdInstr()
Daniel Sanders [Mon, 11 Feb 2019 20:05:49 +0000 (20:05 +0000)]
[globalisel] Restore comment explaining the nits of GISelChangeObserver::createdInstr()

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353741 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MemorySSA] Remove verifyClobberSanity.
Alina Sbirlea [Mon, 11 Feb 2019 19:51:21 +0000 (19:51 +0000)]
[MemorySSA] Remove verifyClobberSanity.

Summary:
This verification may fail after certain transformations due to
BasicAA's fragility. Added a small explanation and a testcase that
triggers the assert in checkClobberSanity (before its removal).
Addresses PR40509.

Reviewers: george.burgess.iv

Subscribers: sanjoy, jlebar, llvm-commits, Prazek

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57973

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353739 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRefactor setAlreadyUnrolled() and setAlreadyVectorized().
Michael Kruse [Mon, 11 Feb 2019 19:45:44 +0000 (19:45 +0000)]
Refactor setAlreadyUnrolled() and setAlreadyVectorized().

Loop::setAlreadyUnrolled() and
LoopVectorizeHints::setLoopAlreadyUnrolled() both add loop metadata that
stops the same loop from being transformed multiple times. This patch
merges both implementations.

In doing so we fix 3 potential issues:

 * setLoopAlreadyUnrolled() kept the llvm.loop.vectorize/interleave.*
   metadata even though it will not be used anymore. This already caused
   problems such as http://llvm.org/PR40546. Change the behavior to the
   one of setAlreadyUnrolled which deletes this loop metadata.

 * setAlreadyUnrolled() used to create a new LoopID by calling
   MDNode::get with nullptr as the first operand, then replacing it by
   the returned references using replaceOperandWith. It is possible
   that MDNode::get would instead return an existing node (due to
   de-duplication) that then gets modified. To avoid, use a fresh
   TempMDNode that does not get uniqued with anything else before
   replacing it with replaceOperandWith.

 * LoopVectorizeHints::matchesHintMetadataName() only compares the
   suffix of the attribute to set the new value for. That is, when
   called with "enable", would erase attributes such as
   "llvm.loop.unroll.enable", "llvm.loop.vectorize.enable" and
   "llvm.loop.distribute.enable" instead of the one to replace.
   Fortunately, function was only called with "isvectorized".

Differential Revision: https://reviews.llvm.org/D57566

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353738 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[InstCombine] Fix matchRotate bug when one operand is a ConstantExpr shift
Sanjay Patel [Mon, 11 Feb 2019 19:26:27 +0000 (19:26 +0000)]
[InstCombine] Fix matchRotate bug when one operand is a ConstantExpr shift

This bug seems to be harmless in release builds, but will cause an error in UBSAN
builds or an assertion failure in debug builds.

When it gets to this opcode comparison, it assumes both of the operands are BinaryOperators,
but the prior m_LogicalShift will also match a ConstantExpr. The cast<BinaryOperator> will
assert in a debug build, or reading an invalid value for BinaryOp from memory with
((BinaryOperator*)constantExpr)->getOpcode() will cause an error in a UBSAN build.

The test I added will fail without this change in debug/UBSAN builds, but not in release.

Patch by: @AndrewScheidecker (Andrew Scheidecker)

Differential Revision: https://reviews.llvm.org/D58049

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353736 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[SelectionDAGBuilder] Add restrictions to EmitFuncArgumentDbgValue
Bjorn Pettersson [Mon, 11 Feb 2019 19:23:30 +0000 (19:23 +0000)]
[SelectionDAGBuilder] Add restrictions to EmitFuncArgumentDbgValue

Summary:
This patch fixes PR40587.

When a dbg.value instrinsic is emitted to the DAG
by using EmitFuncArgumentDbgValue the resulting
DBG_VALUE is hoisted to the beginning of the entry
block. I think the idea is to be able to locate
a formal argument already from the start of the
function.
However, EmitFuncArgumentDbgValue only checked that
the value that was used to describe a variable was
originating from a function parameter, not that the
variable itself actually was an argument to the
function. So when for example assigning a local
variable "local" the value from an argument "a",
the assocated DBG_VALUE instruction would be hoisted
to the beginning of the function, even if the scope
for "local" started somewhere else (or if "local"
was mapped to other values earlier in the function).

This patch adds some logic to EmitFuncArgumentDbgValue
to check that the variable being described actually
is an argument to the function. And that the dbg.value
being lowered already is in the entry block. Otherwise
we bail out, and the dbg.value will be handled as an
ordinary dbg.value (not as a "FuncArgumentDbgValue").

A tricky situation is when both the variable and
the value is related to function arguments, but not
neccessarily the same argument. We make sure that we
do not describe the same argument more than once as
a "FuncArgumentDbgValue". This solution works as long
as opt has injected a "first" dbg.value that corresponds
to the formal argument at the function entry.

Reviewers: jmorse, aprantl

Subscribers: jyknight, hiraditya, fedor.sergeev, dstenb, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57702

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353735 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[LICM&MSSA] Limit store hoisting.
Alina Sbirlea [Mon, 11 Feb 2019 19:07:15 +0000 (19:07 +0000)]
[LICM&MSSA] Limit store hoisting.

Summary:
If there is no clobbering access for a store inside the loop, that store
can only be hoisted if there are no interfearing loads.
A more general verification introduced here: there are no loads that are
not optimized to an access outside the loop.
Addresses PR40586.

Reviewers: george.burgess.iv

Subscribers: sanjoy, jlebar, Prazek, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57967

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353734 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[TargetLibraryInfo] Update run time support for Windows
Evandro Menezes [Mon, 11 Feb 2019 19:02:28 +0000 (19:02 +0000)]
[TargetLibraryInfo] Update run time support for Windows

It seems that the run time for Windows has changed and supports more math
functions than it used to, especially on AArch64, ARM, and AMD64.

Fixes PR40541.

Differential revision: https://reviews.llvm.org/D57625

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353733 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AArch64][GlobalISel] Add isel support for a couple vector exts/truncs
Jessica Paquette [Mon, 11 Feb 2019 18:56:39 +0000 (18:56 +0000)]
[AArch64][GlobalISel] Add isel support for a couple vector exts/truncs

Add support for

- v4s16 <-> v4s32
- v2s64 <-> v2s32

And update tests that use them to show that we generate the correct
instructions.

Differential Revision: https://reviews.llvm.org/D57832

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353732 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[GlobalISel][AArch64] NFC: Remove unnecessary IR from select-fp-casts.mir
Jessica Paquette [Mon, 11 Feb 2019 18:41:22 +0000 (18:41 +0000)]
[GlobalISel][AArch64] NFC: Remove unnecessary IR from select-fp-casts.mir

The IR section in this test doesn't do anything, so there's no point in it
being there. Since it's redundant, just remove it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353731 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[DebugInfo] Fix /usr/lib/debug llvm-symbolizer lookup with relative paths
Jordan Rupprecht [Mon, 11 Feb 2019 18:05:48 +0000 (18:05 +0000)]
[DebugInfo] Fix /usr/lib/debug llvm-symbolizer lookup with relative paths

Summary:
rL189250 added a realpath call, and rL352916 because realpath breaks assumptions with some build systems. However, the /usr/lib/debug case has been clarified, falling back to /usr/lib/debug is currently broken if the obj passed in is a relative path. Adding a call to use absolute paths when falling back to /usr/lib/debug fixes that while still not making any realpath assumptions.

This also adds a --fallback-debug-path command line flag for testing (since we probably can't write to /usr/lib/debug from buildbot environments), but was also verified manually:

```
$ rm -f path/to/dwarfdump-test.elf-x86-64
$ strace llvm-symbolizer --obj=relative/path/to/dwarfdump-test.elf-x86-64.debuglink 0x40113f |& grep dwarfdump
```

Lookups went to relative/path/to/dwarfdump-test.elf-x86-64, relative/path/to/.debug/dwarfdump-test.elf-x86-64, and then finally /usr/lib/debug/absolute/path/to/dwarfdump-test.elf-x86-64.

Reviewers: dblaikie, samsonov

Reviewed By: dblaikie

Subscribers: krytarowski, aprantl, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57916

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353730 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MCA][Scheduler] Track resources that were found busy when issuing an instruction.
Andrea Di Biagio [Mon, 11 Feb 2019 17:55:47 +0000 (17:55 +0000)]
[MCA][Scheduler] Track resources that were found busy when issuing an instruction.

This is a follow up of r353706. When the scheduler fails to issue a ready
instruction to the underlying pipelines, it now updates a mask of 'busy resource
units'. That information will be used in future to obtain the set of
"problematic" resources in the case of bottlenecks caused by resource pressure.
No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353728 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[PowerPC] Avoid scalarization of vector truncate
Roland Froese [Mon, 11 Feb 2019 17:29:14 +0000 (17:29 +0000)]
[PowerPC] Avoid scalarization of vector truncate

The PowerPC code generator currently scalarizes vector truncates that would fit in a vector register, resulting in vector extracts, scalar operations, and vector merges. This patch custom lowers a vector truncate that would fit in a register to a vector shuffle instead.

Differential Revision: https://reviews.llvm.org/D56507

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353724 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[GlobalISel][AArch64] Select G_FFLOOR
Jessica Paquette [Mon, 11 Feb 2019 17:22:58 +0000 (17:22 +0000)]
[GlobalISel][AArch64] Select G_FFLOOR

This teaches the legalizer about G_FFLOOR, and lets us select G_FFLOOR in
AArch64.

It updates the existing floating point tests, and adds a select-floor.mir test.

Differential Revision: https://reviews.llvm.org/D57486

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353722 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRecommit "[GlobalISel] Add IRTranslator support for G_FFLOOR"
Jessica Paquette [Mon, 11 Feb 2019 17:16:32 +0000 (17:16 +0000)]
Recommit "[GlobalISel] Add IRTranslator support for G_FFLOOR"

After the changes introduced in r353586, this instruction doesn't cause any
issues for any backend.

Original review: https://reviews.llvm.org/D57485

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353720 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoGlobalISel: Add G_FCANONICALIZE instruction
Matt Arsenault [Mon, 11 Feb 2019 17:05:20 +0000 (17:05 +0000)]
GlobalISel: Add G_FCANONICALIZE instruction

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353719 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU] fix atomic_optimizations_buffer.ll test after DPP combiner was enabled by...
Valery Pykhtin [Mon, 11 Feb 2019 16:28:42 +0000 (16:28 +0000)]
[AMDGPU] fix atomic_optimizations_buffer.ll test after DPP combiner was enabled by default.

Related commits: rL353691, rL353703.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353717 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[X86] Regenerate insertelement tests
Simon Pilgrim [Mon, 11 Feb 2019 16:16:09 +0000 (16:16 +0000)]
[X86] Regenerate insertelement tests

Add common X86/X64 prefixes (and use X86 instead of X32)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353716 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoAdd recipes for migrating downstream branches of git mirrors
David Greene [Mon, 11 Feb 2019 15:40:02 +0000 (15:40 +0000)]
Add recipes for migrating downstream branches of git mirrors

Add some common recipes for downstream users developing on top of the
existing git mirrors. These instructions show how to migrate local
branches to the monorepo.

Differential Revision: https://reviews.llvm.org/D56550

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353713 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoMove some classes into anonymous namespaces. NFC.
Benjamin Kramer [Mon, 11 Feb 2019 15:16:21 +0000 (15:16 +0000)]
Move some classes into anonymous namespaces. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353710 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[MCA] Return a mask of busy resources from method ResourceManager::checkAvailability...
Andrea Di Biagio [Mon, 11 Feb 2019 14:53:04 +0000 (14:53 +0000)]
[MCA] Return a mask of busy resources from method ResourceManager::checkAvailability(). NFCI

In case of bottlenecks caused by pipeline pressure, we want to be able to
correctly report the set of problematic pipelines. This is a first step towards
adding support for bottleneck hints in llvm-mca (see PR37494). No functional
change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353706 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU] Remove unused variable
Benjamin Kramer [Mon, 11 Feb 2019 14:49:54 +0000 (14:49 +0000)]
[AMDGPU] Remove unused variable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353704 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU] Fix DPP sequence in atomic optimizer.
Neil Henning [Mon, 11 Feb 2019 14:44:14 +0000 (14:44 +0000)]
[AMDGPU] Fix DPP sequence in atomic optimizer.

This commit fixes the DPP sequence in the atomic optimizer (which was
previously missing the row_shr:3 step), and works around a read_register
exec bug by using a ballot instead.

Differential Revision: https://reviews.llvm.org/D57737

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353703 91177308-0d34-0410-b5e6-96231b3b80d8

5 years agoRevert "[X86][SSE] Generalize X86ISD::BLENDI support to more value types"
Sam McCall [Mon, 11 Feb 2019 14:05:36 +0000 (14:05 +0000)]
Revert "[X86][SSE] Generalize X86ISD::BLENDI support to more value types"

This reverts commit r353610.
It causes a miscompile visible in macro expansion in a bootstrapped clang.

http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20190211/626590.html

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353699 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[TEST] Add missing opportunity test for PR39673
Max Kazantsev [Mon, 11 Feb 2019 12:58:18 +0000 (12:58 +0000)]
[TEST] Add missing opportunity test for PR39673

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353693 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[ARM] Add v8m.base pattern for add negative imm
Sam Parker [Mon, 11 Feb 2019 11:35:42 +0000 (11:35 +0000)]
[ARM] Add v8m.base pattern for add negative imm

The v8m.base ISA contains movw, which can operate on an unsigned
16-bit value. Add the pattern that converts an add with a negative
value, that could fit into 16-bits when negated, into a sub with that
positive value.

Differential Revision: https://reviews.llvm.org/D57942

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353692 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[AMDGPU] Enable DPP combiner pass by default.
Valery Pykhtin [Mon, 11 Feb 2019 11:15:03 +0000 (11:15 +0000)]
[AMDGPU] Enable DPP combiner pass by default.

Related revisions: https://reviews.llvm.org/D55444, https://reviews.llvm.org/D55314

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353691 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[NFC][ARM] Simplify loop-indexing codegen test
Sam Parker [Mon, 11 Feb 2019 10:52:49 +0000 (10:52 +0000)]
[NFC][ARM] Simplify loop-indexing codegen test

Remove unnecessary offset checks, CHECK-BASE checks and add some
extra -NOT checks and TODO comments.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353689 91177308-0d34-0410-b5e6-96231b3b80d8

5 years ago[TEST] Add failing test from PR40454
Max Kazantsev [Mon, 11 Feb 2019 10:44:57 +0000 (10:44 +0000)]
[TEST] Add failing test from PR40454

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@353688 91177308-0d34-0410-b5e6-96231b3b80d8