[llvm] [MC,ELF] Emit warning if a string constant contains newline char. (PR #98060)

[Dmitriy Chestnykh via llvm-commits]

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@@ -0,0 +1,54 @@
+// RUN: llvm-mc -filetype=obj -triple x86_64 %s 2>&1 -o /dev/null | FileCheck -DFILE=%s --strict-whitespace %s --implicit-check-not="{{[0-9]+:[0-9]+: warning: unterminated string}}" --check-prefix=CHECK-WARN
+
+.string "abcd\xFFefg
+12345678"
+
+// CHECK-WARN:   [[#@LINE-3]]:21: warning: unterminated string; newline inserted
+// CHECK-NEXT:  .string "abcd\xFFefg
+
+.ascii "some test ascii
+
+sequence
+with
+newlines\x0A
+"
+
+// CHECK-WARN:   [[#@LINE-7]]:24: warning: unterminated string; newline inserted
+// CHECK-NEXT:   .ascii "some test ascii
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chestnykh wrote:

Done

https://github.com/llvm/llvm-project/pull/98060