Changes

[gn build] Port bbab9f986c6d

[mlir][StandardToSPIRV] Add support for lowering memref<?xi1> to SPIR-V

Reviewed By: antiagainst

Differential Revision: https://reviews.llvm.org/D100452

[AArch64][v8.5A] Add BTI to all function starts

The existing BTI placement pass avoids inserting "BTI c" when the
function has local linkage and is only directly called. However,
even in this case, there is a (small) chance that the linker later
adds a hunk with an indirect call to the function, e.g. if the
function is placed in a separate section and moved far away from
its callers. Make sure to add BTI for these functions too.

Differential Revision: https://reviews.llvm.org/D99417

[SLP] createOp - fix null dereference warning. NFCI.

Only attempt to propagateIRFlags if we have both SelectInst - afaict we shouldn't have matched a min/max reduction without both SelectInst, but static analyzer doesn't know that.

[X86][SSE] canonicalizeShuffleWithBinOps - check for more combos of merge-able binary shuffles.

In the fold SHUFFLE(BINOP(X,Y),BINOP(Z,W)) -> BINOP(SHUFFLE(X,Z),SHUFFLE(Y,W)), check if both X/Z AND Y/W have at least one merge-able shuffle in which case the total number of shuffle should still fall.

Helps with instruction count regressions we saw while fixing PR48823

[AMDGPU] Rename "LDS lowering" pass name.

Rename the name of "LDS lowering" pass from `amdgpu-disable-lower-module-lds` to
`amdgpu-enable-lower-module-lds` as later is consistent and reads better.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D100441

[Instcombine] Disable memcpy of alloca bypass for instruction sources

This transformation is fundamentally broken when it comes to dominance,
it just happened to work when the source of the memcpy can be moved into
the place of the alloca. The bug shows up a lot more often since
077bff39d46364035a5dcfa32fc69910ad0975d0 allows the source to be a
switch.

It would be possible to check dominance of the source and all its
operands, but that seems very heavy for instcombine.

[X86] Add PR49028 test case

Add flag for showing skipped headers in -H / --show-includes output

Consider the following set of files:

  a.cc:
  #include "a.h"

  a.h:
  #ifndef A_H
  #define A_H

  #include "b.h"
  #include "c.h"  // This gets "skipped".

  #endif

  b.h:
  #ifndef B_H
  #define B_H

  #include "c.h"

  #endif

  c.h:
  #ifndef C_H
  #define C_H

  void c();

  #endif

And the output of the -H option:

  $ clang -c -H a.cc
  . ./a.h
  .. ./b.h
  ... ./c.h

Note that the include of c.h in a.h is not shown in the output (GCC does the
same). This is because of the include guard optimization: clang knows c.h is
covered by an include guard which is already defined, so when it sees the
include in a.h, it skips it. The same would have happened if #pragma once were
used instead of include guards.

However, a.h *does* include c.h, and it may be useful to show that in the -H
output. This patch adds a flag for doing that.

Differential revision: https://reviews.llvm.org/D100480

clang-format: [JS] merge import lines.

Multiple lines importing from the same URL can be merged:

    import {X} from 'a';
    import {Y} from 'a';

Merge to:

    import {X, Y} from 'a';

This change implements this merge operation. It takes care not to merge in
various corner case situations (default imports, star imports).

Differential Revision: https://reviews.llvm.org/D100466

review comments

track symbol merge status in references to avoid excesive rewrites