Because we shift the stack pointer by an unknown amount, we need an
additional pointer. In the case where we have variable-size objects
as well, we can't reuse the frame pointer, thus three pointers.

Patch by Jacob Gravelle

Differential Revision: https://reviews.llvm.org/D26263

llvm-svn: 286160

This is to prevent SetInsertionPoint from setting debug loc to Latch->getTerminator().

llvm-svn: 286159

This is more clear, as we have also GNU hash these days..

llvm-svn: 286157

Negative exit codes are usually exceptions. They're easier to recognize
in hex. Compare -1073741502 to 0xc0000142.

llvm-svn: 286150

Summary:
In some specific scenarios with well understood operand bundle types
(like `"deopt"`) it may be possible to go ahead and convert recursion to
iteration, but TailRecursionElimination does not have that logic today
so avoid doing the right thing for now.

I need some input on whether `"funclet"` operand bundles should also
block tail recursion elimination.  If not, I'll allow TRE across calls
with `"funclet"` operand bundles and add a test case.

Reviewers: rnk, majnemer, nlewycky, ahatanak

Subscribers: mcrosier, llvm-commits

Differential Revision: https://reviews.llvm.org/D26270

llvm-svn: 286147

llvm-svn: 286146

Summary: Use -fsanitize-recover instead of -mllvm -msan-keep-going.

Reviewers: eugenis

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26352

llvm-svn: 286145

llvm-svn: 286141

llvm-svn: 286140

Similar to r283798, this prevents accidentally referring to temporary
storage that goes out of scope by the end of the statement:

  someStringRef = getStringByValue();
  someStringRef = (Twine("-") + otherString).str();

Note that once again the constructor still has this problem:

  StringRef someStringRef = getStringByValue();

because once again we occasionally rely on this in calls:

  takesStringRef(getStringByValue());
  takesStringRef(Twine("-") + otherString);

Still, it's a step.

llvm-svn: 286139

Add a new script in llvm/utils/git-svn/. When present in the $PATH,
it enables a `git llvm` command. It is providing at this
point only the ability to push from the git monorepo: `git llvm push`.
It is intended to evolves with more features, for instance I plan on
features like `git llvm show r284955` to help working with sequential
revision numbers.
The push feature is taken from Justin Lebar's script available here:
https://github.com/jlebar/llvm-repo-tools/

Differential Revision: https://reviews.llvm.org/D26334

llvm-svn: 286138

llvm-svn: 286137

Although rare, atomic accesses to floating-point types seem to be valid, i.e. `%a = load atomic float ...`. The TSan instrumentation pass however tries to emit inttoptr, which is incorrect, we should use a bitcast here. Anyway, IRBuilder already has a convenient helper function for this.

Differential Revision: https://reviews.llvm.org/D26266

llvm-svn: 286135

The comment explaining why this was necessary is incorrect
in its description of v_cmp's behavior for inactive workitems.

llvm-svn: 286134

If the branch was on a read-undef of vcc, passes that used
analyzeBranch to invert the branch condition wouldn't preserve
the undef flag resulting in a verifier error.

Fixes verifier failures in a future commit.

Also fix verifier error when inserting copy for vccz
corruption bug.

llvm-svn: 286133

Summary:
The C++ side of the Go bindings were updated in r286085, r286086, and r286087,
but those did not remove this type.

Reviewers: djasper

Subscribers: axw

Differential Revision: https://reviews.llvm.org/D26337

llvm-svn: 286131

llvm-svn: 286130

- Remove unused imports.
- Initialize the variable 'name' before its (static) uses, and rename it to a
  more descriptive name.

llvm-svn: 286128

Argument evaluation order is one of the edge cases where Clang differs
from GCC, yielding different IR depending on which compiler LLVM was
built with. Make the order deterministic and tune the test to actually
verify the order instead of trying to hide it.

llvm-svn: 286126

Fixes crashes in tests such as test/CodeGen/X86/masked_gather_scatter.ll which
contains a RUN: with no pipe chain.

llvm-svn: 286125

This reverts commit r286123, accidentally commited while testing itself...

llvm-svn: 286124

Summary:
Some changes are made to cmake, especially the addition of a new
LLVM_ENABLE_PROJECTS option that makes the build system aware of
the monorepo directory structure.

Also a new script is added in llvm/utils/git-svn/. When present in
the $PATH, it enables a `git llvm` command. It is providing at this
point only the ability to push from the git monorepo: `git llvm push`.
It is intended to evolves with more features, for instance I plan on
features like `git llvm show r284955` to help working with sequential
revision numbers.
The push feature is taken from Justin Lebar's script available here:
https://github.com/jlebar/llvm-repo-tools/

Reviewers: jlebar

Subscribers: mgorny, modocache, llvm-commits

Differential Revision: https://reviews.llvm.org/D26334

llvm-svn: 286123

llvm-svn: 286120

Differential Revision: https://reviews.llvm.org/D26292

llvm-svn: 286119

Separate the subregister splitting logic to re-use later.

llvm-svn: 286118

llvm-svn: 286117

This was reverted at r285866 because there was a crash handling a scalar
select of vectors. I added a check for that pattern and a test case based
on the example provided in the post-commit thread for r285732.

llvm-svn: 286113

* Use a generic vector unit to model the issue unit more accurately.
* Update some vector instructions that actually use the vector unit for more
  than one cycle.

Review: Ulrich Weigand
llvm-svn: 286112

This patch adds support for 16 bit floating point registers to the inline asm register selection on AArch64.

Without this patch, register allocation for the example below fails.

define half @test(half %a1, half %a2) #0 {
entry:
  %0 = tail call half asm "sqrshl ${0:h}, ${1:h}, ${2:h}", "=w,w,w" (half %a1, half %a2) #1
  ret half %0
}

Patch by Florian Hahn.

Differential Revision: https://reviews.llvm.org/D25080

llvm-svn: 286111

This feature has been disabled for some time now, so remove cruft.

Differential Revision: https://reviews.llvm.org/D26248

llvm-svn: 286110

IssueWidth updated to reflect the capacity of the issue unit correctly.
Correct number of FX and LS units modelled (2, was 1).

Review: Ulrich Weigand
llvm-svn: 286109

Differential Revision: https://reviews.llvm.org/D26252

llvm-svn: 286108

When the base register (register pointing to the jump table) is the PC, we expect the jump table to directly follow the jump sequence with no intervening padding.

If there is intervening padding, the calculated offsets will not be correct. One solution would be to account for any padding in the emitted LDRB instruction, but at the moment we don't support emitting MCExprs for the load offset.

In the meantime, it's correct and only a slight amount worse to just move the padding up, from just before the jump table to just before the jump instruction sequence. We can do that by emitting code alignment before the jump sequence, as we know the number of instructions in the sequence is always 4.

llvm-svn: 286107

llvm-svn: 286105

cpu/triple duplication

llvm-svn: 286104

llvm-svn: 286095

Summary: Update the docs to match the changes in http://reviews.llvm.org/D7132

Reviewers: beanz, llvm-commits, modocache

Differential Revision: https://reviews.llvm.org/D26296

llvm-svn: 286094

[AVX-512] Remove masked pmovzx/pmovsx builtins and autoupgrade them to selects and native zext/sext.

This mostly reuses earlier autoupgrade support for the sse and avx equivalents. Just needed to add the code to add the select.

llvm-svn: 286092

[X86] Remove GCCBuiltins from cvtsi2ss/cvtsi2sd/cvtss2sd intrinsics as they aren't used by clang. Add TODOs to remove these and some other unused intrinsics.

llvm-svn: 286091

llvm-svn: 286090