Haiku: Pick up a few more codegen parametres from downstream

[brad]

Summary

Pick up a few more codegen parametres from downstream. The DWARF version matches the GCC config.

DWARF version 4, Math Errno handling, ObjC ABI handling, and debug handling.

[brad]

Add a test for the debug handling.

[brad]

More context

[nielx]

Have you been able to test the changes?

clang/lib/Driver/ToolChains/Haiku.h

39

I propose pushing this to version 4. Haiku's GCC also defaults to version 4 now.

[brad]

clang/lib/Driver/ToolChains/Haiku.h

39

I was using the version utilized by the patchset from the LLVM pacakge in HaikuPorts.

+  if (!global_options_set.x_dwarf_version)
+    dwarf_version = 4;

It seems you're right. I think it should be bumped up as well.

[brad]

Bump DWARF version to 4.

[brad]

Use --target= for all additions.

[nielx]

Patch looks good to me and in line with previous work that was done on LLVM to run it on Haiku.

clang/lib/Driver/ToolChains/Haiku.h

 namespace driver {
 namespace toolchains {
 
 class LLVM_LIBRARY_VISIBILITY Haiku : public Generic_ELF {
 public:
   Haiku(const Driver &D, const llvm::Triple &Triple,
           const llvm::opt::ArgList &Args);
 
+  bool IsMathErrnoDefault() const override { return false; }
+  bool IsObjCNonFragileABIDefault() const override { return true; }
   bool isPICDefault() const override { return true; }
 
   void AddClangSystemIncludeArgs(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override;
   void addLibCxxIncludePaths(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override;
   void addLibStdCxxIncludePaths(
       const llvm::opt::ArgList &DriverArgs,
       llvm::opt::ArgStringList &CC1Args) const override;
+
+  unsigned GetDefaultDwarfVersion() const override { return 2; }
+
+  bool GetDefaultStandaloneDebug() const override { return true; }
 };
 
 } // end namespace toolchains
 } // end namespace driver
 } // end namespace clang
 
 #endif // LLVM_CLANG_LIB_DRIVER_TOOLCHAINS_HAIKU_H

clang/test/CodeGen/dwarf-version.c

 // RUN: %clang -target x86_64-linux-gnu -gdwarf-2 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER2
 // RUN: %clang -target x86_64-linux-gnu -gdwarf-3 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER3
 // RUN: %clang -target x86_64-linux-gnu -gdwarf-4 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
 // RUN: %clang -target x86_64-linux-gnu -gdwarf-5 -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
 // RUN: %clang -target x86_64-linux-gnu -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
 // RUN: %clang -target x86_64-linux-gnu -gdwarf -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
 // RUN: %clang --target=i386-pc-solaris -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
 // RUN: %clang --target=i386-pc-solaris -gdwarf -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER5
 
 // The -isysroot is used as a hack to avoid LIT messing with the SDKROOT
 // environment variable which indirecty overrides the version in the target
 // triple used here.
 // RUN: %clang -target x86_64-apple-macosx10.11 -g -S -emit-llvm -o - %s -isysroot %t | FileCheck %s --check-prefix=VER4
 // RUN: %clang -target x86_64-apple-darwin14 -g -S -emit-llvm -o - %s -isysroot %t | FileCheck %s --check-prefix=VER2
 
 // RUN: %clang -target powerpc-unknown-openbsd -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER2
+// RUN: %clang --target=x86_64-unknown-haiku -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER2
 // RUN: %clang -target powerpc-unknown-freebsd -g -S -emit-llvm -o - %s | FileCheck %s --check-prefix=VER4
 
 // Check which debug info formats we use on Windows. By default, in an MSVC
 // environment, we should use codeview. You can enable dwarf, which implicitly
 // disables codeview, of you can explicitly ask for both if you don't know how
 // the app will be debugged.
 //     Default is codeview.
 // RUN: %clang -target i686-pc-windows-msvc -g -S -emit-llvm -o - %s \

clang/test/Driver/clang-g-opts.c

 // RUN: %clang -### -S %s        2>&1 | FileCheck --check-prefix=CHECK-WITHOUT-G %s
 // RUN: %clang -### -S %s -g -target x86_64-linux-gnu 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G %s
 
 // Assert that the toolchains which should default to a lower Dwarf version do so.
 // RUN: %clang -### -S %s -g -target x86_64-apple-darwin8 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
 // RUN: %clang -### -S %s -g -target i686-pc-openbsd 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
 // RUN: %clang -### -S %s -g -target x86_64-pc-freebsd10.0 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
+// RUN: %clang -### -S %s -g --target=x86_64-unknown-haiku 2>&1 \
+// RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
 
 // 'g0' is the default. Just basic correctness check that it does nothing
 // RUN: %clang -### -S %s -g0    2>&1 | FileCheck --check-prefix=CHECK-WITHOUT-G %s
 
 // And check that the last of -g or -g0 wins.
 // RUN: %clang -### -S %s -g -g0 2>&1 | FileCheck --check-prefix=CHECK-WITHOUT-G %s
 
 // These should be semantically the same as not having given 'g0' at all,
 // as the last 'g' option wins.
 //
 // RUN: %clang -### -S %s -g0 -g -target x86_64-linux-gnu 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G %s
 // RUN: %clang -### -S %s -g0 -g -target x86_64-apple-darwin8 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-STANDALONE %s
 // RUN: %clang -### -S %s -g0 -g -target i686-pc-openbsd 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
 // RUN: %clang -### -S %s -g0 -g -target x86_64-pc-freebsd10.0 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
+// RUN: %clang -### -S %s -g0 -g --target=x86_64-unknown-haiku 2>&1 \
+// RUN:             | FileCheck --check-prefix=CHECK-WITH-G-DWARF2 %s
 // RUN: %clang -### -S %s -g0 -g --target=i386-pc-solaris 2>&1 \
 // RUN:             | FileCheck --check-prefix=CHECK-WITH-G %s
 
 // CHECK-WITHOUT-G-NOT: -debug-info-kind
 // CHECK-WITH-G: "-debug-info-kind=constructor"
 // CHECK-WITH-G: "-dwarf-version=5"
 // CHECK-WITH-G-DWARF2: "-dwarf-version=2"
 
 // CHECK-WITH-G-STANDALONE: "-debug-info-kind=standalone"
 // CHECK-WITH-G-STANDALONE: "-dwarf-version=2"
 
 /// TODO: Special case before R_RISCV_SET_ULEB128 linker support becomes more widely available.
 // RUN: %clang -### -S %s -g --target=riscv64-linux-gnu 2>&1 | FileCheck --check-prefix=VERSION4 %s
 // RUN: %clang -### -S %s -g --target=riscv64-unknown-elf 2>&1 | FileCheck --check-prefix=VERSION4 %s
 // VERSION4: "-dwarf-version=4"

clang/test/Driver/fast-math.c

 // RUN: %clang -### -target i686-apple-darwin -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-unknown-freebsd -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-unknown-netbsd -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-unknown-openbsd -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
+// RUN: %clang -### --target=x86_64-unknown-haiku -c %s 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-unknown-dragonfly -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-fuchsia -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-linux-android -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
 // RUN: %clang -### -target x86_64-linux-musl -c %s 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s