Merge llvm/main into amd-debug

Author: SC llvm team

.github/workflows/premerge.yaml

@@ -34,11 +34,6 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 2
-      - name: Setup ccache
-        uses: hendrikmuhs/ccache-action@a1209f81afb8c005c13b4296c32e363431bffea5 # v1.2.17
-        with:
-          variant: "sccache"
-          max-size: "2000M"
       - name: Build and Test
         # Mark the job as a success even if the step fails so that people do
         # not get notified while the new premerge pipeline is in an
@@ -62,6 +57,13 @@ jobs:
           export CC=/opt/llvm/bin/clang
           export CXX=/opt/llvm/bin/clang++
 
+          # This environment variable is passes into the container through the
+          # runner pod definition. This differs between our two clusters which
+          # why we do not hardcode it.
+          export SCCACHE_GCS_BUCKET=$CACHE_GCS_BUCKET
+          export SCCACHE_GCS_RW_MODE=READ_WRITE
+          sccache --start-server
+
           ./.ci/monolithic-linux.sh "${projects_to_build}" "${project_check_targets}" "${runtimes_to_build}" "${runtimes_check_targets}" "${runtimes_check_targets_needs_reconfig}" "${enable_cir}"
       - name: Upload Artifacts
         if: '!cancelled()'
@@ -86,11 +88,6 @@ jobs:
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
         with:
           fetch-depth: 2
-      - name: Setup ccache
-        uses: hendrikmuhs/ccache-action@a1209f81afb8c005c13b4296c32e363431bffea5 # v1.2.17
-        with:
-          variant: "sccache"
-          max-size: "2000M"
       - name: Compute Projects
         id: vars
         run: |
@@ -113,7 +110,7 @@ jobs:
         shell: cmd
         run: |
           call C:\\BuildTools\\Common7\\Tools\\VsDevCmd.bat -arch=amd64 -host_arch=amd64
-          bash .ci/monolithic-windows.sh "${{ steps.vars.outputs.windows-projects }}" "${{ steps.vars.outputs.windows-check-targets }}"
+          bash -c "export SCCACHE_GCS_BUCKET=$CACHE_GCS_BUCKET; export SCCACHE_GCS_RW_MODE=READ_WRITE; sccache --start-server; .ci/monolithic-windows.sh \"${{ steps.vars.outputs.windows-projects }}\" \"${{ steps.vars.outputs.windows-check-targets }}\""
       - name: Upload Artifacts
         if: '!cancelled()'
         uses: actions/upload-artifact@65c4c4a1ddee5b72f698fdd19549f0f0fb45cf08 # v4.6.0

clang/docs/ReleaseNotes.rst

@@ -814,6 +814,8 @@ Bug Fixes in This Version
 - Fixed a failed assertion with an operator call expression which comes from a
   macro expansion when performing analysis for nullability attributes. (#GH138371)
 - Fixed a concept equivalent checking crash due to untransformed constraint expressions. (#GH146614)
+- Fixed a crash in `clang-scan-deps` when a module with the same name is found
+  in different locations (#GH134404, #GH146976).
 - Fix a crash when marco name is empty in ``#pragma push_macro("")`` or
   ``#pragma pop_macro("")``. (GH149762).
 

clang/include/clang/Basic/LangOptions.def

@@ -491,6 +491,8 @@ LANGOPT(CheckConstexprFunctionBodies, 1, 1, Benign,
 
 LANGOPT(BoundsSafety, 1, 0, NotCompatible, "Bounds safety extension for C")
 
+LANGOPT(EnableLifetimeSafety, 1, 0, NotCompatible, "Experimental lifetime safety analysis for C++")
+
 LANGOPT(PreserveVec3Type, 1, 0, NotCompatible, "Preserve 3-component vector type")
 
 #undef LANGOPT

clang/include/clang/Driver/Options.td

@@ -1904,6 +1904,14 @@ defm bounds_safety : BoolFOption<
   BothFlags<[], [CC1Option],
           " experimental bounds safety extension for C">>;
 
+defm lifetime_safety : BoolFOption<
+  "experimental-lifetime-safety",
+  LangOpts<"EnableLifetimeSafety">, DefaultFalse,
+  PosFlag<SetTrue, [], [CC1Option], "Enable">,
+  NegFlag<SetFalse, [], [CC1Option], "Disable">,
+  BothFlags<[], [CC1Option],
+          " experimental lifetime safety for C++">>;
+
 defm addrsig : BoolFOption<"addrsig",
   CodeGenOpts<"Addrsig">, DefaultFalse,
   PosFlag<SetTrue, [], [ClangOption, CC1Option], "Emit">,

clang/lib/Basic/Targets.cpp

@@ -757,6 +757,9 @@ std::unique_ptr<TargetInfo> AllocateTarget(const llvm::Triple &Triple,
     case llvm::Triple::FreeBSD:
       return std::make_unique<FreeBSDTargetInfo<LoongArch64TargetInfo>>(Triple,
                                                                         Opts);
+    case llvm::Triple::OpenBSD:
+      return std::make_unique<OpenBSDTargetInfo<LoongArch64TargetInfo>>(Triple,
+                                                                        Opts);
     default:
       return std::make_unique<LoongArch64TargetInfo>(Triple, Opts);
     }

clang/lib/Basic/Targets/OSTargets.h

@@ -496,6 +496,7 @@ class LLVM_LIBRARY_VISIBILITY OpenBSDTargetInfo : public OSTargetInfo<Target> {
     case llvm::Triple::sparcv9:
       this->MCountName = "_mcount";
       break;
+    case llvm::Triple::loongarch64:
     case llvm::Triple::riscv64:
       break;
     }

clang/lib/Driver/ToolChains/OpenBSD.cpp

@@ -161,7 +161,7 @@ void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
   if (Nopie || Profiling)
     CmdArgs.push_back("-nopie");
 
-  if (Triple.isRISCV64()) {
+  if (Triple.isLoongArch64() || Triple.isRISCV64()) {
     CmdArgs.push_back("-X");
     if (Args.hasArg(options::OPT_mno_relax))
       CmdArgs.push_back("--no-relax");

clang/lib/Sema/AnalysisBasedWarnings.cpp

@@ -2901,8 +2901,7 @@ void clang::sema::AnalysisBasedWarnings::IssueWarnings(
       .setAlwaysAdd(Stmt::UnaryOperatorClass);
   }
 
-  bool EnableLifetimeSafetyAnalysis = !Diags.isIgnored(
-      diag::warn_experimental_lifetime_safety_dummy_warning, D->getBeginLoc());
+  bool EnableLifetimeSafetyAnalysis = S.getLangOpts().EnableLifetimeSafety;
   // Install the logical handler.
   std::optional<LogicalErrorHandler> LEH;
   if (LogicalErrorHandler::hasActiveDiagnostics(Diags, D->getBeginLoc())) {

clang/test/Driver/openbsd.c

@@ -127,9 +127,12 @@
 // UNWIND-TABLES: "-funwind-tables=2"
 // NO-UNWIND-TABLES-NOT: "-funwind-tables=2"
 
-// Check that the -X and --no-relax flags are passed to the linker on riscv64
+// Check that the -X and --no-relax flags are passed to the linker
+// RUN: %clang --target=loongarch64-unknown-openbsd -mno-relax -### %s 2>&1 \
+// RUN:   | FileCheck --check-prefix=LA64-FLAGS %s
 // RUN: %clang --target=riscv64-unknown-openbsd -mno-relax -### %s 2>&1 \
 // RUN:   | FileCheck -check-prefix=RISCV64-FLAGS %s
+// LA64-FLAGS: "-X" "--no-relax"
 // RISCV64-FLAGS: "-X" "--no-relax"
 
 // Check passing LTO flags to the linker

clang/test/Sema/warn-lifetime-safety-dataflow.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -mllvm -debug-only=LifetimeFacts -Wexperimental-lifetime-safety %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -fexperimental-lifetime-safety -mllvm -debug-only=LifetimeFacts -Wexperimental-lifetime-safety %s 2>&1 | FileCheck %s
 // REQUIRES: asserts
 
 struct MyObj {