[clang] [flang] [flang] Default -g to full debug info. (PR #89418)

[via cfe-commits]

https://github.com/abidh created https://github.com/llvm/llvm-project/pull/89418

Currently, -g defaults to line tables only. This PR changes that to full debug information. This will allow us to test/use the upcoming debug info changes.

>From e0391084e9f8fad55c08cc642079afd8923b2729 Mon Sep 17 00:00:00 2001
From: Abid Qadeer <haqadeer at amd.com>
Date: Fri, 19 Apr 2024 16:18:05 +0100
Subject: [PATCH] [flang] Default -g to full debug info.

Currently, -g defaults to line tables only. This PR changes that to
full debug information. This will allow us to test/use the upcoming
debug info changes.
---
 clang/lib/Driver/ToolChains/Flang.cpp     | 2 +-
 flang/lib/Frontend/CompilerInvocation.cpp | 1 +
 flang/test/Driver/debug-level.f90         | 7 +++++++
 3 files changed, 9 insertions(+), 1 deletion(-)
 create mode 100644 flang/test/Driver/debug-level.f90

diff --git a/clang/lib/Driver/ToolChains/Flang.cpp b/clang/lib/Driver/ToolChains/Flang.cpp
index b46bac24503ce1..abe0b931676005 100644
--- a/clang/lib/Driver/ToolChains/Flang.cpp
+++ b/clang/lib/Driver/ToolChains/Flang.cpp
@@ -118,7 +118,7 @@ void Flang::addOtherOptions(const ArgList &Args, ArgStringList &CmdArgs) const {
     Arg *gNArg = Args.getLastArg(options::OPT_gN_Group);
     DebugInfoKind = debugLevelToInfoKind(*gNArg);
   } else if (Args.hasArg(options::OPT_g_Flag)) {
-    DebugInfoKind = llvm::codegenoptions::DebugLineTablesOnly;
+    DebugInfoKind = llvm::codegenoptions::FullDebugInfo;
   } else {
     DebugInfoKind = llvm::codegenoptions::NoDebugInfo;
   }
diff --git a/flang/lib/Frontend/CompilerInvocation.cpp b/flang/lib/Frontend/CompilerInvocation.cpp
index e432c5a302754c..f1b7b53975398e 100644
--- a/flang/lib/Frontend/CompilerInvocation.cpp
+++ b/flang/lib/Frontend/CompilerInvocation.cpp
@@ -145,6 +145,7 @@ static bool parseDebugArgs(Fortran::frontend::CodeGenOptions &opts,
     }
     opts.setDebugInfo(val.value());
     if (val != llvm::codegenoptions::DebugLineTablesOnly &&
+        val != llvm::codegenoptions::FullDebugInfo &&
         val != llvm::codegenoptions::NoDebugInfo) {
       const auto debugWarning = diags.getCustomDiagID(
           clang::DiagnosticsEngine::Warning, "Unsupported debug option: %0");
diff --git a/flang/test/Driver/debug-level.f90 b/flang/test/Driver/debug-level.f90
new file mode 100644
index 00000000000000..bc0aee166e6a37
--- /dev/null
+++ b/flang/test/Driver/debug-level.f90
@@ -0,0 +1,7 @@
+! RUN: %flang %s -g -c -### 2>&1 | FileCheck %s --check-prefix=FULL
+! RUN: %flang %s -g1 -c -### 2>&1 | FileCheck %s --check-prefix=LINE
+! RUN: %flang %s -gline-tables-only -c -### 2>&1 | FileCheck %s --check-prefix=LINE
+
+! LINE: -debug-info-kind=line-tables-only
+! FULL: -debug-info-kind=standalone
+