[flang] Fix Funderscoring TC failure on AIX [NFC]

[madanial0]

Change fundersoring test with a more accurate regex to ensure the lack of a trailing underscore, current TC is failing on AIX

[llvmbot]

@llvm/pr-subscribers-flang-driver

Author: None (madanial0)

Changes

Change fundersoring test with a more accurate regex to ensure the lack of a trailing underscore, current TC is failing on AIX

---

Full diff: https://github.com/llvm/llvm-project/pull/73543.diff

1 Files Affected:

• (modified) flang/test/Driver/underscoring.f90 (+1-1)

diff --git a/flang/test/Driver/underscoring.f90 b/flang/test/Driver/underscoring.f90
index 7c03d040504ea54..8a9ed80ea4daba1 100644
--- a/flang/test/Driver/underscoring.f90
+++ b/flang/test/Driver/underscoring.f90
@@ -21,4 +21,4 @@ subroutine test()
 ! NO-UNDERSCORING-NOT: ext_sub_
 ! NO-UNDERSCORING: {{ext_sub[^_]*$}}
 ! NO-UNDERSCORING-NOT: comblk_
-! NO-UNDERSCORING: comblk,
+! NO-UNDERSCORING: {{comblk[^_]*$}}

[banach-space]

Changes in write-module.f90 look unrelated.

Also, what's the output for AIX? How is it different from what's being tested?

[madanial0]

Changes in write-module.f90 look unrelated.

Creating a new PR for those changes

Also, what's the output for AIX? How is it different from what's being tested?

In AIX the output is comblk_[RW], for the funderscoring and comblk[RW], with the fnounderscoring which fails as it checks for comblk,

[banach-space]

LGTM, thanks!