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, 5 insertions, 0 deletions

diff --git a/lib/std/math.zig b/lib/std/math.zig
index 01cd68e0ed..725a71a4a6 100644
--- a/lib/std/math.zig
+++ b/lib/std/math.zig
@@ -1415,3 +1415,8 @@ test "boolMask" {
     try runTest();
     comptime try runTest();
 }
+
+/// Return the mod of `num` with the smallest integer type
+pub fn comptimeMod(num: anytype, denom: comptime_int) IntFittingRange(0, denom - 1) {
+    return @intCast(IntFittingRange(0, denom - 1), @mod(num, denom));
+}