[llvm-branch-commits] [llvm] [MC] Rewrite stdin.s to use python (PR #157232)

[Paul Kirth via llvm-branch-commits]

================
@@ -0,0 +1,17 @@
+# RUN: echo "// comment" > %t.input
+# RUN: which llvm-mc | %python %s %t
+
+import subprocess
+import sys
+
+llvm_mc_binary = sys.stdin.readlines()[0].strip()
+temp_file = sys.argv[1]
+input_file = temp_file + ".input"
+
+with open(temp_file, "w") as mc_stdout:
+    mc_stdout.seek(4)
----------------
ilovepi wrote:

Can we get a comment here about the seek being the property under test?

Cribbing from the original commit:
```
## We need to test that starting on an input stream that is not at offset 0 would trigger the
assert in WinCOFFObjectWriter.cpp
```

https://github.com/llvm/llvm-project/pull/157232