Merge remote-tracking branch 'origin/master' into llvm13

Conflicts:

 * cmake/Findclang.cmake
 * cmake/Findlld.cmake
 * cmake/Findllvm.cmake

In master branch, more search paths were added to these files with "12"
in the path. In this commit I updated them to "13".

 * src/stage1/codegen.cpp
 * src/zig_llvm.cpp
 * src/zig_llvm.h

In master branch, ZigLLVMBuildCmpXchg is improved to add
`is_single_threaded`. However, the LLVM 13 C API has this already, and
in the llvm13 branch, ZigLLVMBuildCmpXchg is deleted in favor of the C
API. In this commit I updated stage2 to use the LLVM 13 C API rather
than depending on an improved ZigLLVMBuildCmpXchg.

Additionally, src/target.zig largestAtomicBits needed to be updated to
include the new m68k ISA.

1 files changed, 66 insertions, 0 deletions

diff --git a/ci/srht/index.json b/ci/srht/index.json
index 32eb103d17..e24672c348 100644
--- a/ci/srht/index.json
+++ b/ci/srht/index.json
@@ -45,6 +45,72 @@
       "size": "{{AARCH64_LINUX_BYTESIZE}}"
     }
   },
+  "0.8.1": {
+    "date": "2021-09-06",
+    "docs": "https://ziglang.org/documentation/0.8.1/",
+    "stdDocs": "https://ziglang.org/documentation/0.8.1/std/",
+    "notes": "https://ziglang.org/download/0.8.1/release-notes.html",
+    "src": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-0.8.1.tar.xz",
+      "shasum": "8c428e14a0a89cb7a15a6768424a37442292858cdb695e2eb503fa3c7bf47f1a",
+      "size": "12650228"
+    },
+    "bootstrap": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-bootstrap-0.8.1.tar.xz",
+      "shasum": "fa1239247f830ecd51c42537043f5220e4d1dfefdc54356fa419616a0efb3902",
+      "size": "43613464"
+    },
+    "x86_64-freebsd": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-freebsd-x86_64-0.8.1.tar.xz",
+      "shasum": "fc4f6478bcf3a9fce1b8ef677a91694f476dd35be6d6c9c4f44a8b76eedbe176",
+      "size": "39150924"
+    },
+    "aarch64-linux": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-linux-aarch64-0.8.1.tar.xz",
+      "shasum": "2166dc9f2d8df387e8b4122883bb979d739281e1ff3f3d5483fec3a23b957510",
+      "size": "37605932"
+    },
+    "armv7a-linux": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-linux-armv7a-0.8.1.tar.xz",
+      "shasum": "5ba58141805e2519f38cf8e715933cbf059f4f3dade92c71838cce341045de05",
+      "size": "39185876"
+    },
+    "i386-linux": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-linux-i386-0.8.1.tar.xz",
+      "shasum": "2f3e84f30492b5f1c5f97cecc0166f07a8a8d50c5f85dbb3a6ef2a4ee6f915e6",
+      "size": "44782932"
+    },
+    "riscv64-linux": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-linux-riscv64-0.8.1.tar.xz",
+      "shasum": "4adfaf147b025917c03367462fe5018aaa9edbc6439ef9cd0da2b074ae960554",
+      "size": "41234480"
+    },
+    "x86_64-linux": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-linux-x86_64-0.8.1.tar.xz",
+      "shasum": "6c032fc61b5d77a3f3cf781730fa549f8f059ffdb3b3f6ad1c2994d2b2d87983",
+      "size": "41250060"
+    },
+    "aarch64-macos": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-macos-aarch64-0.8.1.tar.xz",
+      "shasum": "5351297e3b8408213514b29c0a938002c5cf9f97eee28c2f32920e1227fd8423",
+      "size": "35340712"
+    },
+    "x86_64-macos": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-macos-x86_64-0.8.1.tar.xz",
+      "shasum": "16b0e1defe4c1807f2e128f72863124bffdd906cefb21043c34b673bf85cd57f",
+      "size": "39946200"
+    },
+    "i386-windows": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-windows-i386-0.8.1.zip",
+      "shasum": "099605051eb0452a947c8eab8fbbc7e43833c8376d267e94e41131c289a1c535",
+      "size": "64152358"
+    },
+    "x86_64-windows": {
+      "tarball": "https://ziglang.org/download/0.8.1/zig-windows-x86_64-0.8.1.zip",
+      "shasum": "43573db14cd238f7111d6bdf37492d363f11ecd1eba802567a172f277d003926",
+      "size": "61897838"
+    }
+  },
   "0.8.0": {
     "date": "2021-06-04",
     "docs": "https://ziglang.org/documentation/0.8.0/",