[gcc/devel/rust/master] Merge #1265

[gcc/devel/rust/master] Merge #1265

[Thomas Schwinge]

https://gcc.gnu.org/g:55ec3454d0d45829431d8904aa0b6363ac362616

commit 55ec3454d0d45829431d8904aa0b6363ac362616
Merge: 93e59035536 39ae84825c5
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Mon May 23 08:58:04 2022 +0000

    Merge #1265
    
    1265: Canonicalize types based on hashing than HirIds and TyTy equality r=philberty a=philberty
    
    This patch updates how we canonicalize the types. The old method was not
    able to handle more complex cases involving generic associated types. So
    this now uses a moe generic hashing system which now speeds up the lookups.
    
    The commit message gives much more detail here.
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/Make-lang.in                             |   1 +
 gcc/rust/backend/rust-compile-block.h             |   1 -
 gcc/rust/backend/rust-compile-context.cc          | 139 ++++++++++++
 gcc/rust/backend/rust-compile-context.h           |  71 ++----
 gcc/rust/backend/rust-compile-expr.h              |   1 -
 gcc/rust/backend/rust-compile-resolve-path.h      |   1 -
 gcc/rust/backend/rust-compile-stmt.h              |   1 -
 gcc/rust/backend/rust-compile-struct-field-expr.h |   1 -
 gcc/rust/backend/rust-compile-type.cc             | 202 ++++++++++-------
 gcc/rust/backend/rust-compile-type.h              |  12 +-
 gcc/rust/backend/rust-compile-tyty.h              | 260 ----------------------
 gcc/rust/backend/rust-mangle.h                    |   3 +-
 12 files changed, 291 insertions(+), 402 deletions(-)