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From 62728c7321a2d07f7d22dadc2b8565ad512b3da4 Mon Sep 17 00:00:00 2001
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From: Konrad Kleine <kkleine@redhat.com>
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Date: Thu, 24 Mar 2022 09:44:21 +0100
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Subject: Produce DWARF4 by default
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Have a look at the following commit to see when the move from DWARF 4 to 5 first happened upstream:
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https://github.com/llvm/llvm-project/commit/d3b26dea16108c427b19b5480c9edc76edf8f5b4?diff=unified
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---
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 clang/include/clang/Driver/ToolChain.h | 2 +-
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 clang/test/CodeGen/dwarf-version.c     | 4 ++--
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 clang/test/Driver/cl-options.c         | 2 +-
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 clang/test/Driver/clang-g-opts.c       | 2 +-
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 clang/test/Driver/ve-toolchain.c       | 2 +-
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 clang/test/Driver/ve-toolchain.cpp     | 2 +-
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 6 files changed, 7 insertions(+), 7 deletions(-)
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diff --git a/clang/include/clang/Driver/ToolChain.h b/clang/include/clang/Driver/ToolChain.h
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index f20ab164531b..53c86ee82936 100644
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--- a/clang/include/clang/Driver/ToolChain.h
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+++ b/clang/include/clang/Driver/ToolChain.h
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@@ -535,7 +535,7 @@ public:
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   // Return the DWARF version to emit, in the absence of arguments
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   // to the contrary.
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-  virtual unsigned GetDefaultDwarfVersion() const { return 5; }
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+  virtual unsigned GetDefaultDwarfVersion() const { return 4; }
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   // Some toolchains may have different restrictions on the DWARF version and
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   // may need to adjust it. E.g. NVPTX may need to enforce DWARF2 even when host
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diff --git a/clang/test/CodeGen/dwarf-version.c b/clang/test/CodeGen/dwarf-version.c
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index 0a6fa4768026..96f01749d0d8 100644
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--- a/clang/test/CodeGen/dwarf-version.c
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+++ b/clang/test/CodeGen/dwarf-version.c
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@@ -2,8 +2,8 @@
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 // RUN: %clang -target x86_64-linux-gnu -gdwarf-3 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER3
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 // RUN: %clang -target x86_64-linux-gnu -gdwarf-4 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
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 // RUN: %clang -target x86_64-linux-gnu -gdwarf-5 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
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-// RUN: %clang -target x86_64-linux-gnu -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
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-// RUN: %clang -target x86_64-linux-gnu -gdwarf -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
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+// RUN: %clang -target x86_64-linux-gnu -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
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+// RUN: %clang -target x86_64-linux-gnu -gdwarf -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
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 // The -isysroot is used as a hack to avoid LIT messing with the SDKROOT
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 // environment variable which indirecty overrides the version in the target
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diff --git a/clang/test/Driver/cl-options.c b/clang/test/Driver/cl-options.c
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index a2e350a0a835..01889ba0bf9b 100644
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--- a/clang/test/Driver/cl-options.c
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+++ b/clang/test/Driver/cl-options.c
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@@ -570,7 +570,7 @@
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 // RUN: %clang_cl /Z7 -gdwarf /c -### -- %s 2>&1 | FileCheck -check-prefix=Z7_gdwarf %s
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 // Z7_gdwarf: "-gcodeview"
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 // Z7_gdwarf: "-debug-info-kind=constructor"
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-// Z7_gdwarf: "-dwarf-version=
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+// Z7_gdwarf: "-dwarf-version=4
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 // RUN: %clang_cl -fmsc-version=1800 -TP -### -- %s 2>&1 | FileCheck -check-prefix=CXX11 %s
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 // CXX11: -std=c++11
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diff --git a/clang/test/Driver/clang-g-opts.c b/clang/test/Driver/clang-g-opts.c
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index d982b1070cae..bb129e75769c 100644
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--- a/clang/test/Driver/clang-g-opts.c
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+++ b/clang/test/Driver/clang-g-opts.c
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@@ -32,7 +32,7 @@
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 // CHECK-WITHOUT-G-NOT: -debug-info-kind
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 // CHECK-WITH-G: "-debug-info-kind=constructor"
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-// CHECK-WITH-G: "-dwarf-version=5"
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+// CHECK-WITH-G: "-dwarf-version=4"
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 // CHECK-WITH-G-DWARF2: "-dwarf-version=2"
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 // CHECK-WITH-G-STANDALONE: "-debug-info-kind=standalone"
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diff --git a/clang/test/Driver/ve-toolchain.c b/clang/test/Driver/ve-toolchain.c
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index 32e25769b6da..b8a2852daba8 100644
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--- a/clang/test/Driver/ve-toolchain.c
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+++ b/clang/test/Driver/ve-toolchain.c
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@@ -6,7 +6,7 @@
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 /// Checking dwarf-version
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 // RUN: %clang -### -g --target=ve %s 2>&1 | FileCheck -check-prefix=DWARF_VER %s
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-// DWARF_VER: "-dwarf-version=5"
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+// DWARF_VER: "-dwarf-version=4"
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 ///-----------------------------------------------------------------------------
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 /// Checking include-path
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diff --git a/clang/test/Driver/ve-toolchain.cpp b/clang/test/Driver/ve-toolchain.cpp
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index 5a33d5eceb61..cedf895b36dc 100644
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--- a/clang/test/Driver/ve-toolchain.cpp
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+++ b/clang/test/Driver/ve-toolchain.cpp
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@@ -7,7 +7,7 @@
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 // RUN: %clangxx -### -g --target=ve-unknown-linux-gnu \
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 // RUN:     %s 2>&1 | FileCheck -check-prefix=DWARF_VER %s
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-// DWARF_VER: "-dwarf-version=5"
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+// DWARF_VER: "-dwarf-version=4"
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 ///-----------------------------------------------------------------------------
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 /// Checking include-path
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-- 
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2.37.1
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