fixes #13122 (#13126)

* fixes #13122

* moved tests to where they belong

tests/align/globalalignas.nim

@@ -0,0 +1,3 @@
+var myglobal1* {.align(128).}: int32
+var myglobal2* {.align(128).}: int32
+var myglobal3* {.align(128).}: int32

tests/align/talign.nim

@@ -0,0 +1,53 @@
+discard """
+ccodeCheck: "\\i @'NIM_ALIGN(128) NI mylocal1' .*"
+target: "c cpp"
+output: "align ok"
+"""
+
+# This is for Azure. The keyword ``alignof`` only exists in ``c++11``
+# and newer. On Azure gcc does not default to c++11 yet.
+
+import globalalignas
+
+var toplevel1 {.align: 32.} : int32
+var toplevel2 {.align: 32.} : int32
+var toplevel3 {.align: 32.} : int32
+
+proc foobar() =
+  var myvar1 {.global, align(64).}: int = 123
+  var myvar2 {.global, align(64).}: int = 123
+  var myvar3 {.global, align(64).}: int = 123
+
+  doAssert (cast[uint](addr(myglobal1)) and 127) == 0
+  doAssert (cast[uint](addr(myglobal2)) and 127) == 0
+  doAssert (cast[uint](addr(myglobal3)) and 127) == 0
+
+  doAssert (cast[uint](addr(myvar1)) and 63) == 0
+  doAssert (cast[uint](addr(myvar2)) and 63) == 0
+  doAssert (cast[uint](addr(myvar3)) and 63) == 0
+
+  doAssert (cast[uint](addr(toplevel1)) and 31) == 0
+  doAssert (cast[uint](addr(toplevel2)) and 31) == 0
+  doAssert (cast[uint](addr(toplevel3)) and 31) == 0
+
+  # test multiple align expressions
+  var mylocal1 {.align(128), align(32).}: int = 123
+  var mylocal2 {.align(128), align(32).}: int = 123
+  var mylocal3 {.align(32), align(128).}: int = 123
+
+  doAssert (cast[uint](addr(mylocal1)) and 127) == 0
+  doAssert (cast[uint](addr(mylocal2)) and 127) == 0
+  doAssert (cast[uint](addr(mylocal3)) and 127) == 0
+
+  echo "align ok"
+
+foobar()
+
+# bug #13122
+
+type Bug[T] = object
+  bug{.align:64.}: T
+  sideffect{.align:64.}: int
+
+var bug: Bug[int]
+doAssert sizeof(bug) == 128, "Oops my size is " & $sizeof(bug) # 16

tests/align/tillegalalign.nim

@@ -0,0 +1,7 @@
+discard """
+cmd: "nim check $options $file"
+errormsg: "power of two expected"
+"""
+
+proc foobar() =
+  let something {.align(33).} = 123