[clang] [Driver] Do not add gno-column-info when using sampling PGO (PR #117954)

[via cfe-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang-driver

Author: Haohai Wen (HaohaiWen)

<details>
<summary>Changes</summary>

Column info is important for sampling PGO to generate/load profile file.
On windows, it will be automatically added when using -gdwarf to generate
profile file. It should also be generated when fprofile-sample-use= is used.

---
Full diff: https://github.com/llvm/llvm-project/pull/117954.diff


2 Files Affected:

- (modified) clang/lib/Driver/ToolChains/Clang.cpp (+6-6) 
- (modified) clang/test/Driver/codeview-column-info.c (+1) 


``````````diff
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 217c1a845f0a47..b6d39a5186b794 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -4690,15 +4690,15 @@ renderDebugOptions(const ToolChain &TC, const Driver &D, const llvm::Triple &T,
   Args.ClaimAllArgs(options::OPT_g_flags_Group);
 
   // Column info is included by default for everything except SCE and
-  // CodeView. Clang doesn't track end columns, just starting columns, which,
-  // in theory, is fine for CodeView (and PDB).  In practice, however, the
-  // Microsoft debuggers don't handle missing end columns well, and the AIX
-  // debugger DBX also doesn't handle the columns well, so it's better not to
-  // include any column info.
+  // CodeView if not use sampling PGO. Clang doesn't track end columns, just
+  // starting columns, which, in theory, is fine for CodeView (and PDB).  In
+  // practice, however, the Microsoft debuggers don't handle missing end columns
+  // well, and the AIX debugger DBX also doesn't handle the columns well, so
+  // it's better not to include any column info.
   if (const Arg *A = Args.getLastArg(options::OPT_gcolumn_info))
     (void)checkDebugInfoOption(A, Args, D, TC);
   if (!Args.hasFlag(options::OPT_gcolumn_info, options::OPT_gno_column_info,
-                    !EmitCodeView &&
+                    !(EmitCodeView && !getLastProfileSampleUseArg(Args)) &&
                         (DebuggerTuning != llvm::DebuggerKind::SCE &&
                          DebuggerTuning != llvm::DebuggerKind::DBX)))
     CmdArgs.push_back("-gno-column-info");
diff --git a/clang/test/Driver/codeview-column-info.c b/clang/test/Driver/codeview-column-info.c
index 4cabefac06e648..99b1d1d9f94689 100644
--- a/clang/test/Driver/codeview-column-info.c
+++ b/clang/test/Driver/codeview-column-info.c
@@ -14,5 +14,6 @@
 // CHECK: "-gno-column-info"
 
 // RUN: %clang_cl -### /Z7 -gcolumn-info -- %s 2>&1 | FileCheck --check-prefix=COLUMN %s
+// RUN: %clang_cl -### --target=x86_64-windows-msvc /Z7 /fprofile-sample-use=%S/Inputs/file.prof -- %s 2>&1 | FileCheck --check-prefix=COLUMN %s
 
 // COLUMN-NOT: "-gno-column-info"

``````````

</details>


https://github.com/llvm/llvm-project/pull/117954