stage2: fix passing arguments on the stack

* push the arguments in reverse order
* add logic for pushing args of any abi size to stack - very similar to
  `genSetStack` however, uses `.rsp` as the base register
* increment and decrement `.rsp` if we called a function with args on
  the stack in `airCall`
* add logic for recovering args from the caller's stack in the callee

1 files changed, 2 insertions, 2 deletions

diff --git a/test/behavior/align.zig b/test/behavior/align.zig
index fe57c79353..dfa8d895c5 100644
--- a/test/behavior/align.zig
+++ b/test/behavior/align.zig
@@ -119,7 +119,7 @@ fn fnWithAlignedStack() i32 {
 }
 
 test "implicitly decreasing slice alignment" {
-    if (builtin.zig_backend == .stage2_x86_64 or builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
 
     const a: u32 align(4) = 3;
     const b: u32 align(8) = 4;
@@ -130,7 +130,7 @@ fn addUnalignedSlice(a: []align(1) const u32, b: []align(1) const u32) u32 {
 }
 
 test "specifying alignment allows pointer cast" {
-    if (builtin.zig_backend == .stage2_x86_64 or builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
 
     try testBytesAlign(0x33);
 }