Merge remote-tracking branch 'origin/master' into llvm14

Author: andrewrk

lib/std/os/linux.zig

@@ -376,7 +376,7 @@ pub fn mknodat(dirfd: i32, path: [*:0]const u8, mode: u32, dev: u32) usize {
     return syscall4(.mknodat, @bitCast(usize, @as(isize, dirfd)), @ptrToInt(path), mode, dev);
 }
 
-pub fn mount(special: [*:0]const u8, dir: [*:0]const u8, fstype: [*:0]const u8, flags: u32, data: usize) usize {
+pub fn mount(special: [*:0]const u8, dir: [*:0]const u8, fstype: ?[*:0]const u8, flags: u32, data: usize) usize {
     return syscall5(.mount, @ptrToInt(special), @ptrToInt(dir), @ptrToInt(fstype), flags, data);
 }
 

src/Sema.zig

@@ -21614,10 +21614,10 @@ fn beginComptimePtrLoad(
                 deref.ty_without_well_defined_layout = field_ptr.container_ty;
             }
 
-            const tv = &(deref.pointee orelse {
+            const tv = deref.pointee orelse {
                 deref.pointee = null;
                 break :blk deref;
-            });
+            };
             const coerce_in_mem_ok =
                 (try sema.coerceInMemoryAllowed(block, field_ptr.container_ty, tv.ty, false, target, src, src)) == .ok or
                 (try sema.coerceInMemoryAllowed(block, tv.ty, field_ptr.container_ty, false, target, src, src)) == .ok;

test/behavior.zig

@@ -82,6 +82,7 @@ test {
     _ = @import("behavior/bugs/11179.zig");
     _ = @import("behavior/bugs/11181.zig");
     _ = @import("behavior/bugs/11213.zig");
+    _ = @import("behavior/bugs/12003.zig");
     _ = @import("behavior/byteswap.zig");
     _ = @import("behavior/byval_arg_var.zig");
     _ = @import("behavior/call.zig");

test/behavior/bugs/12003.zig

@@ -0,0 +1,7 @@
+test {
+    comptime {
+        const tuple_with_ptrs = .{ &0, &0 };
+        const field_ptr = (&tuple_with_ptrs.@"0");
+        _ = field_ptr.*;
+    }
+}

test/cases/compile_errors/asm_at_compile_time.zig

@@ -14,4 +14,5 @@ fn doSomeAsm() void {
 // backend=llvm
 // target=native
 //
-// :6:5: error: unable to evaluate constant expression
+// :6:5: error: unable to resolve comptime value
+// :2:14: note: called from here

test/cases/compile_errors/duplicate_error_in_switch.zig

@@ -8,8 +8,8 @@ export fn entry() void {
 }
 fn foo(x: i32) !void {
     switch (x) {
-        0 ... 10 => return error.Foo,
-        11 ... 20 => return error.Bar,
+        0...10 => return error.Foo,
+        11...20 => return error.Bar,
         else => {},
     }
 }
@@ -19,4 +19,4 @@ fn foo(x: i32) !void {
 // target=native
 //
 // :5:9: error: duplicate switch value
-// :3:9: note: other value here
+// :3:9: note: previous value here