This issue is known upstream, but it's still not fixed.
We disable it for now, waiting to merge the final fix from upstream.

David Carlier authored Aug 09, 2018 and Pietro Fezzardi committed Oct 01, 2018

Reviewers: dblaikie, dexonsmith	

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D50296


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r341642 | tnorthover | 2018-09-07 11:21:25 +0200 (Fri, 07 Sep 2018) | 8 lines

ARM: fix Thumb2 CodeGen for ldrex with folded frame-index.

Because t2LDREX (& t2STREX) were marked as AddrModeNone, but did allow a
FrameIndex operand, rewriteT2FrameIndex asserted. This gives them a
proper addressing-mode and tells the rewriter about it so that encodable
offsets are exploited and others are rejected.

Should fix PR38828.
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r341512 | ctopper | 2018-09-06 04:03:14 +0200 (Thu, 06 Sep 2018) | 7 lines

[X86][Assembler] Allow %eip as a register in 32-bit mode for .cfi directives.

This basically reverts a change made in r336217, but improves the text of the error message for not allowing IP-relative addressing in 32-bit mode.

Fixes PR38826.

Patch by Iain Sandoe.
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r341416 | annat | 2018-09-05 00:12:23 +0200 (Wed, 05 Sep 2018) | 11 lines

[LV] First order recurrence phis should not be treated as uniform

This is fix for PR38786.
First order recurrence phis were incorrectly treated as uniform,
which caused them to be vectorized as uniform instructions.

Patch by Ayal Zaks and Orivej Desh!

Reviewed by: Anna

Differential Revision: https://reviews.llvm.org/D51639
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r340959 | mareko | 2018-08-29 22:03:00 +0200 (Wed, 29 Aug 2018) | 9 lines

AMDGPU: Handle 32-bit address wraparounds for SMRD opcodes

Summary: This fixes GPU hangs with OpenGL bindless handle arithmetic.

Reviewers: arsenm, nhaehnle

Subscribers: kzhuravl, jvesely, wdng, yaxunl, dstuttard, tpr, t-tye, llvm-commits

Differential Revision: https://reviews.llvm.org/D51203
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r341244 | tstellar | 2018-08-31 22:15:31 +0200 (Fri, 31 Aug 2018) | 11 lines

lit: Use sys.executable for executing builtin commands

Summary:
The python executable may not exist on all systems so use sys.executable
instead.

Reviewers: ddunbar, stella.stamenova

Subscribers: delcypher, llvm-commits

Differential Revision: https://reviews.llvm.org/D51511
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r341094 | efriedma | 2018-08-30 20:59:24 +0200 (Thu, 30 Aug 2018) | 11 lines

[SROA] Fix alignment for uses of PHI nodes.

Splitting an alloca can decrease the alignment of GEPs into the
partition.  Normally, rewriting accounts for this, but the code was
missing for uses of PHI nodes and select instructions.

Fixes https://bugs.llvm.org/show_bug.cgi?id=38707 .

Differential Revision: https://reviews.llvm.org/D51335


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r340900 | hans | 2018-08-29 08:55:27 +0200 (Wed, 29 Aug 2018) | 6 lines

LoopSink: Don't sink into blocks without an insertion point (PR38462)

In the PR, LoopSink was trying to sink into a catchswitch block, which
doesn't have a valid insertion point.

Differential Revision: https://reviews.llvm.org/D51307
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r340751 | hans | 2018-08-27 17:55:39 +0200 (Mon, 27 Aug 2018) | 7 lines

Use a lambda for calls to ::open in RetryAfterSignal

In Bionic, open can be overloaded for _FORTIFY_SOURCE support, causing
compile errors of RetryAfterSignal due to overload resolution. Wrapping
the call in a lambda avoids this.

Based on a patch by Chih-Wei Huang <cwhuang@linux.org.tw>!
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r340417 | hakzsam | 2018-08-22 18:08:48 +0200 (Wed, 22 Aug 2018) | 14 lines

AMDGPU: bump AS.MAX_COMMON_ADDRESS to 6 since 32-bit addr space

32-bit constant address space is declared as 6, so the
maximum number of address spaces is 6, not 5.

Fixes "LLVM ERROR: Pointer address space out of range".

v5: rename MAX_COMMON_ADDRESS to MAX_AMDGPU_ADDRESS
v4: - fix compilation issues
    - fix out of bounds access
v3: use static_assert()
v2: add a very simple test for 32-bit addr space

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106630
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r340416 | hakzsam | 2018-08-22 18:08:43 +0200 (Wed, 22 Aug 2018) | 8 lines

AMDGPU: fix existing alias rules for constant and global

Constant and global may alias, also one rules table wasn't
ordered correctly.

Pinpointed by Matt.

v2: add a test with swapped parameters
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r340455 | yhs | 2018-08-22 23:21:03 +0200 (Wed, 22 Aug 2018) | 38 lines

bpf: fix an assertion in BPFAsmBackend applyFixup()

Fix bug https://bugs.llvm.org/show_bug.cgi?id=38643



In BPFAsmBackend applyFixup(), there is an assertion for FixedValue to be 0.
This may not be true, esp. for optimiation level 0.
For example, in the above bug, for the following two
static variables:
  @bpf_map_lookup_elem = internal global i8* (i8*, i8*)*
      inttoptr (i64 1 to i8* (i8*, i8*)*), align 8
  @bpf_map_update_elem = internal global i32 (i8*, i8*, i8*, i64)*
      inttoptr (i64 2 to i32 (i8*, i8*, i8*, i64)*), align 8

The static variable @bpf_map_update_elem will have a symbol
offset of 8 and a FK_SecRel_8 with FixupValue 8 will cause
the assertion if llvm is built with -DLLVM_ENABLE_ASSERTIONS=ON.

The above relocations will not exist if the program is compiled
with optimization level -O1 and above as the compiler optimizes
those static variables away. In the below error message, -O2
is suggested as this is the common practice.

Note that FixedValue = 0 in applyFixup() does exist and is valid,
e.g., for the global variable my_map in the above bug. The bpf
loader will process them properly for map_id's before loading
the program into the kernel.

The static variables, which are not optimized away by compiler,
may have FK_SecRel_8 relocation with non-zero FixedValue.

The patch removed the offending assertion and will issue
a hard error as below if the FixedValue in applyFixup()
is not 0.
  $ llc -march=bpf -filetype=obj fixup.ll
  LLVM ERROR: Unsupported relocation: try to compile with -O2 or above,
      or check your static variable usage

Signed-off-by: Yonghong Song <yhs@fb.com>
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r340820 | uabelho | 2018-08-28 14:40:11 +0200 (Tue, 28 Aug 2018) | 34 lines

[CloneFunction] Constant fold terminators before checking single predecessor

Summary:
This fixes PR31105.

There is code trying to delete dead code that does so by e.g. checking if
the single predecessor of a block is the block itself.

That check fails on a block like this
 bb:
   br i1 undef, label %bb, label %bb
since that has two (identical) predecessors.

However, after the check for dead blocks there is a call to
ConstantFoldTerminator on the basic block, and that call simplifies the
block to
 bb:
   br label %bb

Therefore we now do the call to ConstantFoldTerminator before the check if
the block is dead, so it can realize that it really is.

The original behavior lead to the block not being removed, but it was
simplified as above, and then we did a call to
    Dest->replaceAllUsesWith(&*I);
with old and new being equal, and an assertion triggered.

Reviewers: chandlerc, fhahn

Reviewed By: fhahn

Subscribers: eraman, llvm-commits

Differential Revision: https://reviews.llvm.org/D51280
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r340839 | bcain | 2018-08-28 18:23:39 +0200 (Tue, 28 Aug 2018) | 14 lines

[debuginfo] generate debug info with asm+.file

Summary:
For assembly input files, generate debug info even when the .file
directive is present, provided it does not include a file-number
argument.  Fixes PR38695.

Reviewers: probinson, sidneym

Subscribers: aprantl, hiraditya, JDevlieghere, llvm-commits

Differential Revision: https://reviews.llvm.org/D51315


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r340641 | stefanp | 2018-08-24 21:38:29 +0200 (Fri, 24 Aug 2018) | 9 lines

[Exception Handling] Unwind tables are required for all functions that have an EH personality.

This patch is for defect:
https://bugs.llvm.org/show_bug.cgi?id=32611

Functions may require unwind tables even if they are marked with the attribute
nounwind. Any function with an EH personality may require an unwind table.

Differential Revision: https://reviews.llvm.org/D50987
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r340691 | codafi | 2018-08-25 21:54:39 +0200 (Sat, 25 Aug 2018) | 11 lines

[C-API][DIBuilder] Use NameLen in LLVMDIBuilderCreateParameterVariable

Summary: NameLen wasn't being used and caused the parameters in gdb to very long, in my case, crashes in others. Please also perform the correct magical incarnations to have this be applied to the LLVM 7 branch.

Reviewers: whitequark, CodaFi

Reviewed By: CodaFi

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D51141
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r340303 | ctopper | 2018-08-21 19:15:33 +0200 (Tue, 21 Aug 2018) | 9 lines

[BypassSlowDivision] Teach bypass slow division not to interfere with div by constant where constants have been constant hoisted, but not moved from their basic block

DAGCombiner doesn't pay attention to whether constants are opaque before doing the div by constant optimization. So BypassSlowDivision shouldn't introduce control flow that would make DAGCombiner unable to see an opaque constant. This can occur when a div and rem of the same constant are used in the same basic block. it will be hoisted, but not leave the block.

Longer term we probably need to look into the X86 immediate cost model used by constant hoisting and maybe not mark div/rem immediates for hoisting at all.

This fixes the case from PR38649.

Differential Revision: https://reviews.llvm.org/D51000
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r339674 | aemerson | 2018-08-14 14:04:25 +0200 (Tue, 14 Aug 2018) | 3 lines

[GlobalISel][IRTranslator] Fix a bug in handling repeating struct types during argument lowering.

Differential Revision: https://reviews.llvm.org/D49442
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r340158 | s.desmalen | 2018-08-20 11:16:59 +0200 (Mon, 20 Aug 2018) | 16 lines

[AArch64][SVE] Asm: Add SVE System registers

This patch adds system registers for controlling aspects of SVE:
- ZCR_EL1  (r/w)   visible at EL1 and EL0.
- ZCR_EL2  (r/w)   visible at EL2 and Non-secure EL1 and EL0.
- ZCR_EL3  (r/w)   visible at all exception levels.

and a system register identifying SVE:
- ID_AA64ZFR0_EL1  (r)  SVE Feature identifier.

Reviewers: SjoerdMeijer, samparker, pbarrio, fhahn, javed.absar

Reviewed By: SjoerdMeijer

Differential Revision: https://reviews.llvm.org/D50885

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r339091 | stella.stamenova | 2018-08-07 06:08:46 +0200 (Tue, 07 Aug 2018) | 12 lines

[lit, tests] Fix failing lit test: shtest-format.py

Summary:
The problem here is that on windows double quotes are used for paths (usually) while single quotes are not. This is not generally a problem for the tests because the lit infrastructure tends to treat both the same. One (and possibly only) exception is when some tests are run in an external shell such as some of the shtest-format tests. In this case on windows the path to python was not created correctly because it had single quotes and the test failed.

This same test is already failing with python 3 which is why our testing missed the new failure. This patch will take care of the immediate failure with python 2 and I'll send a follow up for the python 3 failure.

Reviewers: asmith, zturner

Subscribers: delcypher, llvm-commits

Differential Revision: https://reviews.llvm.org/D50373
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r339895 | niravd | 2018-08-16 18:31:14 +0200 (Thu, 16 Aug 2018) | 13 lines

[MC][X86] Enhance X86 Register expression handling to more closely match GCC.

Allow the comparison of x86 registers in the evaluation of assembler
directives. This generalizes and simplifies the extension from r334022
to catch another case found in the Linux kernel.

Reviewers: rnk, void

Reviewed By: rnk

Subscribers: hiraditya, nickdesaulniers, llvm-commits

Differential Revision: https://reviews.llvm.org/D50795
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r339896 | d0k | 2018-08-16 18:50:23 +0200 (Thu, 16 Aug 2018) | 1 line

[MC] Remove unused variable
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r339822 | carrot | 2018-08-16 00:08:26 +0200 (Thu, 16 Aug 2018) | 12 lines


[CodeGenPrepare] Add BothExtension type to PromotedInsts

This patch fixes PR38125.

Instruction extension types are recorded in PromotedInsts, it can be used later in function canGetThrough. If an instruction has two users with different extension types, it will be inserted into PromotedInsts two times in function promoteOperandForOther. The second one overwrites the first one, and the final extension type is wrong, later causes problem in canGetThrough.

This patch changes the simple bool extension type to 2-bit enum type, add a BothExtension type in addition to zero/sign extension. When an user sees BothExtension for an instruction, it actually knows nothing about how that instruction is extended.

Differential Revision: https://reviews.llvm.org/D49512


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r338841 | jmorse | 2018-08-03 12:13:35 +0200 (Fri, 03 Aug 2018) | 11 lines

[Windows FS] Allow moving files in TempFile::keep

In r338216 / D49860 TempFile::keep was extended to allow keeping across
filesystems. The aim on Windows was to have this happen in rename_internal
using the existing system API. However, to fix an issue and preserve the
idea of "renaming" not being a move, put Windows keep-across-filesystem in
TempFile::keep.

Differential Revision: https://reviews.llvm.org/D50048


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r339945 | ctopper | 2018-08-16 23:54:02 +0200 (Thu, 16 Aug 2018) | 9 lines

[X86] In EFLAGS copy pass, don't emit EXTRACT_SUBREG instructions since we're after peephole

Normally the peephole pass converts EXTRACT_SUBREG to COPY instructions. But we're after peephole so we can't rely on it to clean these up.

To fix this, the eflags pass now emits a COPY with a subreg input.

I also noticed that in 32-bit mode we need to constrain the input to the copy to ensure the subreg is valid. Otherwise we'll fail verify-machineinstrs

Differential Revision: https://reviews.llvm.org/D50656
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r339883 | hans | 2018-08-16 17:12:12 +0200 (Thu, 16 Aug 2018) | 10 lines

[cmake] Prevent LLVMgold.so from being unloaded on Linux

Extend the fix from D40459 to also apply to modules such as the LLVM
gold plugin. This is needed because current binutils master (and future
binutils 2.32) calls dlclose() on bfd plugins as part of a recent fix
for https://sourceware.org/bugzilla/show_bug.cgi?id=23460.

Patch by Evangelos Foutras!

Differential Revision: https://reviews.llvm.org/D50416
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r339515 | d0k | 2018-08-12 13:43:03 +0200 (Sun, 12 Aug 2018) | 4 lines

[InstSimplify] Guard against large shift amounts.

These are always UB, but can happen for large integer inputs. Testing it
is very fragile as -simplifycfg will nuke the UB top-down.
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r339769 | nemanjai | 2018-08-15 14:58:13 +0200 (Wed, 15 Aug 2018) | 12 lines

[PowerPC] Don't run BV DAG Combine before legalization if it assumes legal types

When trying to combine a DAG that builds a vector out of sign-extensions of
vector extracts, the code assumes legal input types. Due to that, we have to
disable this combine prior to legalization.
In some cases, the DAG will look slightly different after legalization so
account for that in the matching code.

This is a fix for https://bugs.llvm.org/show_bug.cgi?id=38087

Differential Revision: https://reviews.llvm.org/D49080

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r339536 | ctopper | 2018-08-13 08:53:49 +0200 (Mon, 13 Aug 2018) | 3 lines

[SelectionDAG] In PromoteFloatOp_BITCAST, insert a bitcast after the fp_to_fp16 in case the result type isn't a scalar integer.

This is another variation of PR38533. In this case, the result type of the bitcast is legal and 16-bits wide, but not a scalar integer. So we need to emit the convert to i16 and then bitcast it to the true result type. This new bitcast will be further type legalized if necessary.
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r339535 | ctopper | 2018-08-13 08:53:47 +0200 (Mon, 13 Aug 2018) | 5 lines

[SelectionDAG] In PromoteIntRes_BITCAST, when the input is TypePromoteFloat, make sure the output type is scalar. For vectors, use a store and load of temporary.

Previously if the result type was a vector, we emitted a FP_TO_FP16 with a vector result type which isn't valid.

This is basically the opposite case of the root cause of PR38533.
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