Make -funwind-tables the default for SystemZ.

[anoopkg6]

Making -funwind-tables by default for SystemZ like other architectures in driver by setting UnwindTableLevel::Asynchronous.
This enables eh_frame to be generated by default.

[llvmbot]

@llvm/pr-subscribers-compiler-rt-sanitizer

@llvm/pr-subscribers-clang-driver

Author: None (anoopkg6)

Changes

Making -funwind-tables by default for SystemZ like other architectures in driver by setting UnwindTableLevel::Asynchronous.
This enables eh_frame to be generated by default.

---

Full diff: https://github.com/llvm/llvm-project/pull/139764.diff

1 Files Affected:

• (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+1)

diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 8397f1121ec2c..73e372537927c 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -3103,6 +3103,7 @@ Generic_GCC::getDefaultUnwindTableLevel(const ArgList &Args) const {
   case llvm::Triple::ppc64le:
   case llvm::Triple::riscv32:
   case llvm::Triple::riscv64:
+  case llvm::Triple::systemz:
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
     return UnwindTableLevel::Asynchronous;

[llvmbot]

@llvm/pr-subscribers-clang

Author: None (anoopkg6)

Changes

Making -funwind-tables by default for SystemZ like other architectures in driver by setting UnwindTableLevel::Asynchronous.
This enables eh_frame to be generated by default.

---

Full diff: https://github.com/llvm/llvm-project/pull/139764.diff

1 Files Affected:

• (modified) clang/lib/Driver/ToolChains/Gnu.cpp (+1)

diff --git a/clang/lib/Driver/ToolChains/Gnu.cpp b/clang/lib/Driver/ToolChains/Gnu.cpp
index 8397f1121ec2c..73e372537927c 100644
--- a/clang/lib/Driver/ToolChains/Gnu.cpp
+++ b/clang/lib/Driver/ToolChains/Gnu.cpp
@@ -3103,6 +3103,7 @@ Generic_GCC::getDefaultUnwindTableLevel(const ArgList &Args) const {
   case llvm::Triple::ppc64le:
   case llvm::Triple::riscv32:
   case llvm::Triple::riscv64:
+  case llvm::Triple::systemz:
   case llvm::Triple::x86:
   case llvm::Triple::x86_64:
     return UnwindTableLevel::Asynchronous;

[MaskRay]

This PR actually enables -fasynchronous-unwind-tables instead of -funwind-tables.

-fasynchronous-unwind-tables and -funwind-tables control different boolean values. When both are enabled, -fasynchronous-unwind-tables takes precedence.

[github-actions]

✅ With the latest revision this PR passed the Python code formatter.