From 4f2618e75bfbaaea755c7fec14f5ae844eb3d0f8 Mon Sep 17 00:00:00 2001
From: joachimschmidt557 <joachim.schmidt557@outlook.com>
Date: Sun, 23 Aug 2020 23:10:19 +0200
Subject: [PATCH] stage2: Add Hello World test for ARM backend

---
 src-self-hosted/codegen.zig |  2 +-
 test/stage2/test.zig        | 40 +++++++++++++++++++++++++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src-self-hosted/codegen.zig b/src-self-hosted/codegen.zig
index 4d6075e2e9..e0caaba38f 100644
--- a/src-self-hosted/codegen.zig
+++ b/src-self-hosted/codegen.zig
@@ -1277,7 +1277,7 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
                     mem.writeIntBig(u32, try self.code.addManyAsArray(4), Instruction.bkpt(0).toU32());
                 },
                 else => return self.fail(src, "TODO implement @breakpoint() for {}", .{self.target.cpu.arch}),
-                }
+            }
             return .none;
         }
 
diff --git a/test/stage2/test.zig b/test/stage2/test.zig
index 627cfc7fe0..fee8886ddb 100644
--- a/test/stage2/test.zig
+++ b/test/stage2/test.zig
@@ -18,6 +18,11 @@ const linux_riscv64 = std.zig.CrossTarget{
     .os_tag = .linux,
 };
 
+const linux_arm = std.zig.CrossTarget{
+    .cpu_arch = .arm,
+    .os_tag = .linux,
+};
+
 const wasi = std.zig.CrossTarget{
     .cpu_arch = .wasm32,
     .os_tag = .wasi,
@@ -181,6 +186,41 @@ pub fn addCases(ctx: *TestContext) !void {
         );
     }
 
+    {
+        var case = ctx.exe("hello world", linux_arm);
+        // Regular old hello world
+        case.addCompareOutput(
+            \\export fn _start() noreturn {
+            \\    print();
+            \\    exit();
+            \\}
+            \\
+            \\fn print() void {
+            \\    asm volatile ("svc #0"
+            \\        :
+            \\        : [number] "{r7}" (4),
+            \\          [arg1] "{r0}" (1),
+            \\          [arg2] "{r1}" (@ptrToInt("Hello, World!\n")),
+            \\          [arg3] "{r2}" (14)
+            \\        : "memory"
+            \\    );
+            \\    return;
+            \\}
+            \\
+            \\fn exit() noreturn {
+            \\    asm volatile ("svc #0"
+            \\        :
+            \\        : [number] "{r7}" (1),
+            \\          [arg1] "{r0}" (0)
+            \\        : "memory"
+            \\    );
+            \\    unreachable;
+            \\}
+        ,
+            "Hello, World!\n",
+        );
+    }
+
     {
         var case = ctx.exe("adding numbers at comptime", linux_x64);
         case.addCompareOutput(