Subzero. WASM. Additional progress.

wasm-tests/write_loop.c

Index: wasm-tests/write_loop.c
diff --git a/wasm-tests/write_loop.c b/wasm-tests/write_loop.c
new file mode 100644
index 0000000000000000000000000000000000000000..d398d6b5d0060912178d72fe2778257dd0564dd6
--- /dev/null
+++ b/wasm-tests/write_loop.c
@@ -0,0 +1,14 @@
+// This is derived from the loop in musl's __fwritex that looks for newlines.
+
+int puts(const char *s);
+
+int main(int argc, const char **argv) {
+  const char *p = (const char *)argv;
+  char *s = "Hello\nWorld";
+  unsigned i = 0;
+  // Depend on argc to avoid having this whole thing get dead-code-eliminated.
+  for (i = 14 - argc; i && p[i - 1] != '\n'; i--)
+    ;
+  puts(s);
+  return i;
+}