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[Clang][NFC] Move HeadingAndSpellings to avoid copying #143611

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shafik
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@shafik shafik commented Jun 10, 2025

Static analysis flagged that we could move HeadingAndSpellings and avoid a copy of a large object.

Static analysis flagged that we could move HeadingAndSpellings and avoid a copy
of a large object.
@llvmbot llvmbot added the clang Clang issues not falling into any other category label Jun 10, 2025
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llvmbot commented Jun 10, 2025

@llvm/pr-subscribers-clang

Author: Shafik Yaghmour (shafik)

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Static analysis flagged that we could move HeadingAndSpellings and avoid a copy of a large object.


Full diff: https://github.com/llvm/llvm-project/pull/143611.diff

1 Files Affected:

  • (modified) clang/utils/TableGen/ClangAttrEmitter.cpp (+1-1)
diff --git a/clang/utils/TableGen/ClangAttrEmitter.cpp b/clang/utils/TableGen/ClangAttrEmitter.cpp
index 21d76c12a3cce..42627f02cf356 100644
--- a/clang/utils/TableGen/ClangAttrEmitter.cpp
+++ b/clang/utils/TableGen/ClangAttrEmitter.cpp
@@ -5405,7 +5405,7 @@ void EmitClangAttrDocs(const RecordKeeper &Records, raw_ostream &OS) {
       // Handle Undocumented category separately - no content merging
       if (Cat == "Undocumented" && UndocumentedCategory) {
         UndocumentedDocs.push_back(
-            DocumentationData(Doc, Attr, HeadingAndSpellings));
+            DocumentationData(Doc, Attr, std::move(HeadingAndSpellings)));
         continue;
       }
 

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LGTM

@shafik shafik merged commit f39f53e into llvm:main Jun 11, 2025
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llvm-ci commented Jun 12, 2025

LLVM Buildbot has detected a new failure on builder ppc64le-flang-rhel-clang running on ppc64le-flang-rhel-test while building clang at step 6 "test-build-unified-tree-check-flang".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/157/builds/30546

Here is the relevant piece of the build log for the reference
Step 6 (test-build-unified-tree-check-flang) failure: test (failure)
******************** TEST 'Flang :: Semantics/modfile75.F90' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -c -fhermetic-module-files -DWHICH=1 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90 && /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -c -fhermetic-module-files -DWHICH=2 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90 && /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -fdebug-unparse /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90 | /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90 # RUN: at line 1
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -c -fhermetic-module-files -DWHICH=1 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -c -fhermetic-module-files -DWHICH=2 /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/flang -fc1 -fdebug-unparse /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90
error: Semantic errors in /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90
/home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90:15:11: error: Must be a constant value
    integer(c_int) n
            ^^^^^
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/build/bin/FileCheck /home/buildbots/llvm-external-buildbots/workers/ppc64le-flang-rhel-test/ppc64le-flang-rhel-clang-build/llvm-project/flang/test/Semantics/modfile75.F90

--

********************


@shafik shafik deleted the clangAttrEmitterMoveOverCopygetallDriverDefinitions_b branch June 13, 2025 16:05
tomtor pushed a commit to tomtor/llvm-project that referenced this pull request Jun 14, 2025
Static analysis flagged that we could move HeadingAndSpellings and avoid
a copy of a large object.
akuhlens pushed a commit to akuhlens/llvm-project that referenced this pull request Jun 24, 2025
Static analysis flagged that we could move HeadingAndSpellings and avoid
a copy of a large object.
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