This strips out a lot of the code that should no longer be needed from
the MVETailPredictionPass, leaving the important part - find active lane
mask instructions and convert them to VCTP operations.

Differential Revision: https://reviews.llvm.org/D91866

Revert rG12d59b69 "[DAG] Legalize umin(x,y) -> sub(x,usubsat(x,y)) and umax(x,y) -> add(x,usubsat(y,x)) iff usubsat is legal"

This reverts commit 12d59b69.

Prematurely pushed this to trunk

[DAG] Legalize umin(x,y) -> sub(x,usubsat(x,y)) and umax(x,y) -> add(x,usubsat(y,x)) iff usubsat is legal

If usubsat() is legal, this is likely to result in smaller codegen expansion than the default cmp+select codegen expansion.

Allows us to move the x86-specific lowering to the generic expansion code.

Depends on D83697

Original patch by Daniel Grumberg.

Differential Revision: https://reviews.llvm.org/D83698

A crash/assertion failure in the greedy register allocator was tracked
down to a debug instr being passed to LiveIntervals::getInstructionIndex.
Normally this should not occur as debug instructions are collected and
removed by LiveDebugVariables before RA, and reinserted afterwards.
However, when a function has no debug info, LiveDebugVariables simply
strips any debug values that are present as they're not needed (this
situation will occur when a function with debug info is inlined into a
nodebug function). The problem is, it only removes DBG_VALUE instructions,
leaving DBG_LABELs (the cause of the crash).

This patch updates the LiveDebugVariables nodebug path to remove all debug
instructions. The test case verifies that DBG_VALUE/DBG_LABEL instructions
are present, and that they are stripped.

When -experimental-debug-variable-locations is enabled, certain variable
locations are represented by DBG_INSTR_REF instead of DBG_VALUE. The test
case verifies that a DBG_INSTR_REF is emitted by the option, and that it
is also stripped.

Differential Revision: https://reviews.llvm.org/D92127

Same idea as in D92103 and D92106, but I realised after creating those reviews that there are
also TemplateTemplateParmDecls that can have default arguments, so here's hopefully the
last patch for default template arguments.

Reviewed By: martong

Differential Revision: https://reviews.llvm.org/D92119

Update VPReplicateRecipe to inherit from VPValue. This still does not
update scalarizeInstruction to set the result for the VPValue of
VPReplicateRecipe, because this first requires tracking scalar values in
VPTransformState.

Reviewed By: reames

Differential Revision: https://reviews.llvm.org/D91500

This change is required so that bufferization can properly identify
the linalg.yield as a terminator with an associated parent op.

Differential Revision: https://reviews.llvm.org/D92173

When bailing out in rewriteLoopExitValues() you could be left with PHI
nodes in the DeadInsts vector. Those would be not handled by the use of
RecursivelyDeleteTriviallyDeadInstructions() in IndVarSimplify. This
resulted in the IndVarSimplify pass returning an incorrect modified
status. This was caught by the expensive check introduced in D86589.

This patches changes IndVarSimplify so that it deletes those PHI nodes,
using RecursivelyDeleteDeadPHINode().

This fixes PR47486.

Reviewed By: mkazantsev

Differential Revision: https://reviews.llvm.org/D91153

The cost-model is not getting the cost right for a mul with <2 x i64>
operands, i.e. we don't have a MUL.2d, and this is precommitting some
tests before adjusting this.

Add comprehensive stackframe regression tests as a preparation of
VEFrameLowering.cpp optimizations.

Reviewed By: simoll

Differential Revision: https://reviews.llvm.org/D92170

This enables partial bufferization that includes function signatures. To test this, this
change also makes the func-bufferize partial and adds a dedicated finalizing-bufferize pass.

Differential Revision: https://reviews.llvm.org/D92032

In some cases system includes extractions is not enough, we also need target specific defines.
The problems appears when clang default target is not the same as toolchain's one (GCC cross-compiler, MinGW on Windows).
After this patch `query-driver` also extracts target and adds `--target=<extracted target>` compile option.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D92012

Add 32-bit tests and test i8/i16/i32/i64/i128 like we do for abs.ll

Add a basic implementation of getGatherScatterOpCost to BasicTTIImpl.

The implementation estimates the cost of scalarizing the loads/stores,
the cost of packing/extracting the individual lanes and the cost of
only selecting enabled lanes.

This more accurately reflects the current cost on targets like AArch64.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D91984

I am working on a baremetal riscv toolchain using LLVM runtime and
LLD linker. Baremetal.cpp provides most of the things needed for such
toolchain. So I have modified it to also handle riscv64/32-unknown-elf
 targets alongside arm-none-eabi.

Currently, targets like riscv64-unknown-elf are handled by RISCVToolChain
which mostly expects a gcc toolchain to be present. If you dont
want the dependency on gcc-toolchain/libgloss or want to use LLD, then
RISCVToolChain is not a good fit.

So in the toolchain selection code, I have made this dependency of
RISCVToolChain on gcc toolchain explicit. It is created if gcc-toolchain
option is present. Otherwise Baremetal toolchain is created. I will be
happy to hear if there is a better way to choose between these two
toolchains.

Reviewed By: jroelofs

Differential Revision: https://reviews.llvm.org/D91442

This will fix remaining failures on gcc-9 buildbot: http://lab.llvm.org:8011/#/builders/101.
gcc-8 and gcc-9 do not support constexpr destructors nor constexpr allocation.

Fix gcc warnings: -Wconversion, -Wpragmas.

Updated the affected scalable_of_scalable tests in sve-gep.ll, as isConstantSplatValue now returns true in DAGCombiner::visitMUL and folds `(mul x, 1) -> x`

Reviewed By: sdesmalen

Differential Revision: https://reviews.llvm.org/D91363

This reverts commit f690986f.

Compile time then and again...

Differential Revision: https://reviews.llvm.org/D91339

Reverted because the compile time impact is still too high.

isKnownViaNonRecursiveReasoning is used twice, we can do it just once.

Differential Revision: https://reviews.llvm.org/D92152

This reverts commit 3d4c0460.

Compile time impact is still high. Need to understand why.

Differential Revision: https://reviews.llvm.org/D92153

We report an error for unknown `DT_PLTREL` values.
This switches the error to warning.

Differential revision: https://reviews.llvm.org/D92087

Previously we tried to using isKnownPredicateAt, but it makes an
extra query to isKnownPredicate, which has negative impact on compile
time. Let's try to use more lightweight isBasicBlockEntryGuardedByCond.

Differential Revision: https://reviews.llvm.org/D92152

This handles cases were the input isn't known to be sign extended.

[RISCV] Add test cases for missed opportunities to use sbsetw/sbclrw/sbinvw when the result isn't known to be sign extended.

If the input isn't sign extended, but the output of the or/xor/and
is used by a sign_inreg we can still use sbsetw/sbclrw/sbinvw.

This reverts commit 14f2ad0e.

Reverting to investigate compile time drop.

Differential Revision: https://reviews.llvm.org/D92152

I recalled Marshall had already made this change. The change is
committed in e3f89a98.

[libc++] [P0966] [C++20] Fix bug PR45368 by correctly implementing P0966: string::reserve should not shrink.

This patch fixes the implementation as well as the tests that didn't actually test the wanted behaviour.
You'll find all the details in the bug report.
It adds as well deprecation warning for reserve() (without argument) and adds a test.

http://wg21.link/P0966R1
https://bugs.llvm.org/show_bug.cgi?id=45368
https://reviews.llvm.org/D54992

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D91778

It's more future-proof to use isGFX10Plus from the start, on the
assumption that future architectures will be based on current
architectures.

Also make use of the existing isGFX9Plus in a few places.

Differential Revision: https://reviews.llvm.org/D92092

Currently, papers and issues are in separate .csv files (that is easier to update), but I can put them inline.Transforming current html tables into rst are done by the script (attached to the patch FYI but I'll remove it before committing).
I'll of course update RST files before committing to match any modifications that may happen in master branch.

This patch moves the status pages in www/ to RST format in docs/.

It also does some other minor changes: fix copyright year and broken comment end, adds substitutions for coherence (and add colors, but that can be removed easily).
It adds as well redirects from old to new status pages.

Reviewed By: ldionne, #libc

Differential Revision: https://reviews.llvm.org/D92076

After cf1c774d, Clang seems to generate code
that is more similar to icc/Clang, so we can use the same line numbers for
all compilers in this test.

Fixes https://github.com/clangd/clangd/issues/602

Differential Revision: https://reviews.llvm.org/D92148

Differential Revision: https://reviews.llvm.org/D71126

Needed for a future automatic update to RST.