[PATCH] D133875: [clang] fix generation of .debug_aranges with LTO (resubmit)

[Azat Khuzhin via Phabricator via cfe-commits]

azat updated this revision to Diff 460302.
azat added a comment.

Add a real check of .debug_aranges in the test


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D133875/new/

https://reviews.llvm.org/D133875

Files:
  clang/lib/Driver/ToolChains/CommonArgs.cpp
  clang/test/Driver/debug-options-aranges.c


Index: clang/test/Driver/debug-options-aranges.c
===================================================================
--- /dev/null
+++ clang/test/Driver/debug-options-aranges.c
@@ -0,0 +1,20 @@
+// REQUIRES: lld
+// Check that lld will emit dwarf aranges.
+
+// Check that the linker plugin will get -generate-arange-section
+//
+// RUN: %clang -### -g -target x86_64-unknown-linux -c         -fuse-ld=lld -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=GARANGE %s
+// RUN: %clang -### -g -target x86_64-unknown-linux -flto      -fuse-ld=lld -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=PLUGIN_GARANGE %s
+// RUN: %clang -### -g -target x86_64-unknown-linux -flto=thin -fuse-ld=lld -gdwarf-aranges %s 2>&1 | FileCheck -check-prefix=PLUGIN_GARANGE %s
+//
+// GARANGE: -generate-arange-section
+// PLUGIN_GARANGE: --plugin-opt=-generate-arange-section
+
+// RUN: %clang -g -target x86_64-unknown-linux            -fuse-ld=lld -gdwarf-aranges %s -o - | llvm-dwarfdump --debug-aranges - | FileCheck -check-prefix=ARANGES %s
+// RUN: %clang -g -target x86_64-unknown-linux -flto      -fuse-ld=lld -gdwarf-aranges %s -o - | llvm-dwarfdump --debug-aranges - | FileCheck -check-prefix=ARANGES %s
+// RUN: %clang -g -target x86_64-unknown-linux -flto=thin -fuse-ld=lld -gdwarf-aranges %s -o - | llvm-dwarfdump --debug-aranges - | FileCheck -check-prefix=ARANGES %s
+// ARANGES: Address Range Header: length = 0x0000002c, format = DWARF32, version = 0x0002, cu_offset = 0x00000000, addr_size = 0x08, seg_size = 0x00
+
+int main()
+{
+}
Index: clang/lib/Driver/ToolChains/CommonArgs.cpp
===================================================================
--- clang/lib/Driver/ToolChains/CommonArgs.cpp
+++ clang/lib/Driver/ToolChains/CommonArgs.cpp
@@ -508,6 +508,13 @@
     CmdArgs.push_back(Args.MakeArgString(Plugin));
   }
 
+  // Note, this solution is far from perfect, better to encode it into IR
+  // metadata, but this may not be worth it, since it looks like aranges is on
+  // the way out.
+  if (Args.hasArg(options::OPT_gdwarf_aranges)) {
+    CmdArgs.push_back(Args.MakeArgString("--plugin-opt=-generate-arange-section"));
+  }
+
   // Try to pass driver level flags relevant to LTO code generation down to
   // the plugin.
 


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