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Merged
merged 2 commits into from
Dec 17, 2024

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Michael137
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The llvm-gcc front-end has been EOL'd at least since 2011 (based on some git archeology). And Clang/LLVM has been removing references to it ever since.

This patch removes the remaining references to it from LLDB. One benefit of this is that it will allow us to remove the code checking for DW_AT_decl_file_attributes_are_invalid and Supports_DW_AT_APPLE_objc_complete_type.

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llvmbot commented Dec 17, 2024

@llvm/pr-subscribers-lldb

Author: Michael Buch (Michael137)

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The llvm-gcc front-end has been EOL'd at least since 2011 (based on some git archeology). And Clang/LLVM has been removing references to it ever since.

This patch removes the remaining references to it from LLDB. One benefit of this is that it will allow us to remove the code checking for DW_AT_decl_file_attributes_are_invalid and Supports_DW_AT_APPLE_objc_complete_type.


Full diff: https://github.com/llvm/llvm-project/pull/120225.diff

7 Files Affected:

  • (modified) lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp (+2-14)
  • (modified) lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h (-1)
  • (modified) lldb/test/API/functionalities/conditional_break/TestConditionalBreak.py (+1-1)
  • (modified) lldb/test/API/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py (+1-1)
  • (modified) lldb/test/API/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py (-21)
  • (modified) lldb/test/API/lang/cpp/namespace/TestNamespace.py (+1-1)
  • (modified) lldb/unittests/SymbolFile/DWARF/DWARFUnitTest.cpp (-35)
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
index 07de23f9de2fd6..50f2b0e2a279b7 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.cpp
@@ -736,15 +736,9 @@ bool DWARFUnit::LinkToSkeletonUnit(DWARFUnit &skeleton_unit) {
   return false; // Already linked to a different unit.
 }
 
-bool DWARFUnit::Supports_DW_AT_APPLE_objc_complete_type() {
-  return GetProducer() != eProducerLLVMGCC;
-}
+bool DWARFUnit::Supports_DW_AT_APPLE_objc_complete_type() { return true; }
 
-bool DWARFUnit::DW_AT_decl_file_attributes_are_invalid() {
-  // llvm-gcc makes completely invalid decl file attributes and won't ever be
-  // fixed, so we need to know to ignore these.
-  return GetProducer() == eProducerLLVMGCC;
-}
+bool DWARFUnit::DW_AT_decl_file_attributes_are_invalid() { return false; }
 
 bool DWARFUnit::Supports_unnamed_objc_bitfields() {
   if (GetProducer() == eProducerClang)
@@ -768,10 +762,6 @@ void DWARFUnit::ParseProducerInfo() {
       llvm::StringRef(R"(swiftlang-([0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?))"));
   static const RegularExpression g_clang_version_regex(
       llvm::StringRef(R"(clang-([0-9]+\.[0-9]+\.[0-9]+(\.[0-9]+)?))"));
-  static const RegularExpression g_llvm_gcc_regex(
-      llvm::StringRef(R"(4\.[012]\.[01] )"
-                      R"(\(Based on Apple Inc\. build [0-9]+\) )"
-                      R"(\(LLVM build [\.0-9]+\)$)"));
 
   llvm::SmallVector<llvm::StringRef, 3> matches;
   if (g_swiftlang_version_regex.Execute(producer, &matches)) {
@@ -783,8 +773,6 @@ void DWARFUnit::ParseProducerInfo() {
     m_producer = eProducerClang;
   } else if (producer.contains("GNU")) {
     m_producer = eProducerGCC;
-  } else if (g_llvm_gcc_regex.Execute(producer)) {
-    m_producer = eProducerLLVMGCC;
   }
 }
 
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
index 0a0019c25836b4..5d032fefb2a206 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/DWARFUnit.h
@@ -34,7 +34,6 @@ enum DWARFProducer {
   eProducerInvalid = 0,
   eProducerClang,
   eProducerGCC,
-  eProducerLLVMGCC,
   eProducerSwift,
   eProducerOther
 };
diff --git a/lldb/test/API/functionalities/conditional_break/TestConditionalBreak.py b/lldb/test/API/functionalities/conditional_break/TestConditionalBreak.py
index 725e5d4722dd18..9852df883ff277 100644
--- a/lldb/test/API/functionalities/conditional_break/TestConditionalBreak.py
+++ b/lldb/test/API/functionalities/conditional_break/TestConditionalBreak.py
@@ -10,7 +10,7 @@
 # rdar://problem/8532131
 # lldb not able to digest the clang-generated debug info correctly with respect to function name
 #
-# This class currently fails for clang as well as llvm-gcc.
+# This class currently fails for clang.
 
 
 class ConditionalBreakTestCase(TestBase):
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py b/lldb/test/API/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
index 6fa15d9e5ee606..8d840a03d064af 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-cpp/TestDataFormatterCpp.py
@@ -67,7 +67,7 @@ def cleanup():
         )
 
         # gcc4.2 on Mac OS X skips typedef chains in the DWARF output
-        if self.getCompiler() in ["clang", "llvm-gcc"]:
+        if self.getCompiler() in ["clang"]
             self.expect(
                 "frame variable",
                 patterns=[
diff --git a/lldb/test/API/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py b/lldb/test/API/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
index aac18e13bf54f2..2c0a89f9839941 100644
--- a/lldb/test/API/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
+++ b/lldb/test/API/functionalities/data-formatter/data-formatter-skip-summary/TestDataFormatterSkipSummary.py
@@ -157,27 +157,6 @@ def cleanup():
             ],
         )
 
-        # Bad debugging info on SnowLeopard gcc (Apple Inc. build 5666).
-        # Skip the following tests if the condition is met.
-        if self.getCompiler().endswith("gcc") and not self.getCompiler().endswith(
-            "llvm-gcc"
-        ):
-            import re
-
-            gcc_version_output = system([[lldbutil.which(self.getCompiler()), "-v"]])
-            self.trace("my output:", gcc_version_output)
-            for line in gcc_version_output.split(os.linesep):
-                m = re.search("\(Apple Inc\. build ([0-9]+)\)", line)
-                self.trace("line:", line)
-                if m:
-                    gcc_build = int(m.group(1))
-                    self.trace("gcc build:", gcc_build)
-                    if gcc_build >= 5666:
-                        # rdar://problem/9804600"
-                        self.skipTest(
-                            "rdar://problem/9804600 wrong namespace for std::string in debug info"
-                        )
-
         # Expand same expression, skipping 3 layers of summaries
         self.expect(
             "frame variable data1.m_child1->m_child2 --show-types --no-summary-depth=3",
diff --git a/lldb/test/API/lang/cpp/namespace/TestNamespace.py b/lldb/test/API/lang/cpp/namespace/TestNamespace.py
index 8b013d928f9ca5..40cbff9cb3c949 100644
--- a/lldb/test/API/lang/cpp/namespace/TestNamespace.py
+++ b/lldb/test/API/lang/cpp/namespace/TestNamespace.py
@@ -161,7 +161,7 @@ def test_with_run_command(self):
         # On Mac OS X, gcc 4.2 emits the wrong debug info with respect to
         # types.
         slist = ["(int) a = 12", "anon_uint", "a_uint", "b_uint", "y_uint"]
-        if self.platformIsDarwin() and self.getCompiler() in ["clang", "llvm-gcc"]:
+        if self.platformIsDarwin() and self.getCompiler() in ["clang"]:
             slist = [
                 "(int) a = 12",
                 "::my_uint_t",
diff --git a/lldb/unittests/SymbolFile/DWARF/DWARFUnitTest.cpp b/lldb/unittests/SymbolFile/DWARF/DWARFUnitTest.cpp
index 91354494155e6b..e847b3d39ebd66 100644
--- a/lldb/unittests/SymbolFile/DWARF/DWARFUnitTest.cpp
+++ b/lldb/unittests/SymbolFile/DWARF/DWARFUnitTest.cpp
@@ -122,41 +122,6 @@ TEST(DWARFUnitTest, ClangProducer) {
   EXPECT_EQ(unit->GetProducerVersion(), llvm::VersionTuple(1300, 0, 29, 3));
 }
 
-TEST(DWARFUnitTest, LLVMGCCProducer) {
-  const char *yamldata = R"(
---- !ELF
-FileHeader:
-  Class:   ELFCLASS64
-  Data:    ELFDATA2LSB
-  Type:    ET_EXEC
-  Machine: EM_386
-DWARF:
-  debug_str:
-    - 'i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)'
-  debug_abbrev:
-    - Table:
-        - Code:            0x00000001
-          Tag:             DW_TAG_compile_unit
-          Children:        DW_CHILDREN_yes
-          Attributes:
-            - Attribute:       DW_AT_producer
-              Form:            DW_FORM_strp
-  debug_info:
-    - Version:         4
-      AddrSize:        8
-      Entries:
-        - AbbrCode:        0x1
-          Values:
-            - Value:           0x0
-        - AbbrCode:        0x0
-)";
-
-  YAMLModuleTester t(yamldata);
-  DWARFUnit *unit = t.GetDwarfUnit();
-  ASSERT_TRUE((bool)unit);
-  EXPECT_EQ(unit->GetProducer(), eProducerLLVMGCC);
-}
-
 TEST(DWARFUnitTest, SwiftProducer) {
   const char *yamldata = R"(
 --- !ELF

Michael137 added a commit to Michael137/llvm-project that referenced this pull request Dec 17, 2024
…lete_type and DW_AT_decl_file_attributes_are_invalid

Depends on llvm#120225

With `llvm-gcc` support being removed from LLDB, these APIs
are now trivial and can be removed too.
@Michael137 Michael137 merged commit e0a79ee into llvm:main Dec 17, 2024
7 checks passed
@Michael137 Michael137 deleted the lldb/remove-llvm-gcc branch December 17, 2024 13:23
Michael137 added a commit that referenced this pull request Dec 17, 2024
…lete_type and DW_AT_decl_file_attributes_are_invalid (#120226)

Depends on #120225

With `llvm-gcc` support being removed from LLDB, these APIs
are now trivial and can be removed too.
Michael137 added a commit to swiftlang/llvm-project that referenced this pull request Dec 23, 2024
The `llvm-gcc` front-end has been EOL'd at least since 2011 (based on
some `git` archeology). And Clang/LLVM has been removing references to
it ever since.

This patch removes the remaining references to it from LLDB. One benefit
of this is that it will allow us to remove the code checking for
`DW_AT_decl_file_attributes_are_invalid` and
`Supports_DW_AT_APPLE_objc_complete_type`.

(cherry picked from commit e0a79ee)
Michael137 added a commit to swiftlang/llvm-project that referenced this pull request Dec 23, 2024
…lete_type and DW_AT_decl_file_attributes_are_invalid (llvm#120226)

Depends on llvm#120225

With `llvm-gcc` support being removed from LLDB, these APIs
are now trivial and can be removed too.

(cherry picked from commit f176388)
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