Adding upstream version 1.76.0+dfsg1.upstream/1.76.0+dfsg1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 21 insertions, 64 deletions

diff --git a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
index 31565db1b..6fd0c9014 100644
--- a/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
+++ b/compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp
@@ -37,7 +37,9 @@
 #include "llvm/Transforms/Utils/FunctionImportUtils.h"
 #include "llvm/LTO/LTO.h"
 #include "llvm/Bitcode/BitcodeWriter.h"
-
+#if LLVM_VERSION_GE(18, 0)
+#include "llvm/TargetParser/Host.h"
+#endif
 #include "llvm/Transforms/Instrumentation.h"
 #include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
 #include "llvm/Support/TimeProfiler.h"
@@ -60,17 +62,17 @@ typedef struct LLVMOpaqueTargetMachine *LLVMTargetMachineRef;
 DEFINE_STDCXX_CONVERSION_FUNCTIONS(Pass, LLVMPassRef)
 DEFINE_STDCXX_CONVERSION_FUNCTIONS(TargetMachine, LLVMTargetMachineRef)
 
-extern "C" void LLVMTimeTraceProfilerInitialize() {
+extern "C" void LLVMRustTimeTraceProfilerInitialize() {
   timeTraceProfilerInitialize(
       /* TimeTraceGranularity */ 0,
       /* ProcName */ "rustc");
 }
 
-extern "C" void LLVMTimeTraceProfilerFinishThread() {
+extern "C" void LLVMRustTimeTraceProfilerFinishThread() {
   timeTraceProfilerFinishThread();
 }
 
-extern "C" void LLVMTimeTraceProfilerFinish(const char* FileName) {
+extern "C" void LLVMRustTimeTraceProfilerFinish(const char* FileName) {
   StringRef FN(FileName);
   std::error_code EC;
   raw_fd_ostream OS(FN, EC, sys::fs::CD_CreateAlways);
@@ -204,11 +206,7 @@ enum class LLVMRustCodeModel {
   None,
 };
 
-#if LLVM_VERSION_LT(16, 0)
-static Optional<CodeModel::Model>
-#else
 static std::optional<CodeModel::Model>
-#endif
 fromRust(LLVMRustCodeModel Model) {
   switch (Model) {
   case LLVMRustCodeModel::Tiny:
@@ -222,11 +220,7 @@ fromRust(LLVMRustCodeModel Model) {
   case LLVMRustCodeModel::Large:
     return CodeModel::Large;
   case LLVMRustCodeModel::None:
-#if LLVM_VERSION_LT(16, 0)
-    return None;
-#else
     return std::nullopt;
-#endif
   default:
     report_fatal_error("Bad CodeModel.");
   }
@@ -418,7 +412,7 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
     const char *SplitDwarfFile,
     const char *OutputObjFile,
     const char *DebugInfoCompression,
-    bool ForceEmulatedTls,
+    bool UseEmulatedTls,
     const char *ArgsCstrBuff, size_t ArgsCstrBuffLen) {
 
   auto OptLevel = fromRust(RustOptLevel);
@@ -452,7 +446,6 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
   if (OutputObjFile) {
       Options.ObjectFilenameForDebug = OutputObjFile;
   }
-#if LLVM_VERSION_GE(16, 0)
   if (!strcmp("zlib", DebugInfoCompression) && llvm::compression::zlib::isAvailable()) {
     Options.CompressDebugSections = DebugCompressionType::Zlib;
   } else if (!strcmp("zstd", DebugInfoCompression) && llvm::compression::zstd::isAvailable()) {
@@ -460,19 +453,14 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
   } else if (!strcmp("none", DebugInfoCompression)) {
     Options.CompressDebugSections = DebugCompressionType::None;
   }
-#endif
 
   Options.RelaxELFRelocations = RelaxELFRelocations;
   Options.UseInitArray = UseInitArray;
 
 #if LLVM_VERSION_LT(17, 0)
-  if (ForceEmulatedTls) {
-    Options.ExplicitEmulatedTLS = true;
-    Options.EmulatedTLS = true;
-  }
-#else
-  Options.EmulatedTLS = ForceEmulatedTls || Trip.hasDefaultEmulatedTLS();
+  Options.ExplicitEmulatedTLS = true;
 #endif
+  Options.EmulatedTLS = UseEmulatedTls;
 
   if (TrapUnreachable) {
     // Tell LLVM to codegen `unreachable` into an explicit trap instruction.
@@ -480,6 +468,14 @@ extern "C" LLVMTargetMachineRef LLVMRustCreateTargetMachine(
     // it prevents control flow from "falling through" into whatever code
     // happens to be laid out next in memory.
     Options.TrapUnreachable = true;
+    // But don't emit traps after other traps or no-returns unnecessarily.
+    // ...except for when targeting WebAssembly, because the NoTrapAfterNoreturn
+    // option causes bugs in the LLVM WebAssembly backend. You should be able to
+    // remove this check when Rust's minimum supported LLVM version is >= 18
+    // https://github.com/llvm/llvm-project/pull/65876
+    if (!Trip.isWasm()) {
+      Options.NoTrapAfterNoreturn = true;
+    }
   }
 
   if (Singlethread) {
@@ -734,22 +730,14 @@ LLVMRustOptimize(
   bool DebugPassManager = false;
 
   PassInstrumentationCallbacks PIC;
-#if LLVM_VERSION_LT(16, 0)
-  StandardInstrumentations SI(DebugPassManager);
-#else
   StandardInstrumentations SI(TheModule->getContext(), DebugPassManager);
-#endif
   SI.registerCallbacks(PIC);
 
   if (LlvmSelfProfiler){
     LLVMSelfProfileInitializeCallbacks(PIC,LlvmSelfProfiler,BeforePassCallback,AfterPassCallback);
   }
 
-#if LLVM_VERSION_LT(16, 0)
-  Optional<PGOOptions> PGOOpt;
-#else
   std::optional<PGOOptions> PGOOpt;
-#endif
 #if LLVM_VERSION_GE(17, 0)
   auto FS = vfs::getRealFileSystem();
 #endif
@@ -868,7 +856,11 @@ LLVMRustOptimize(
         // cargo run tests in multhreading mode by default
         // so use atomics for coverage counters
         Options.Atomic = true;
+#if LLVM_VERSION_GE(18, 0)
+        MPM.addPass(InstrProfilingLoweringPass(Options, false));
+#else
         MPM.addPass(InstrProfiling(Options, false));
+#endif
       }
     );
   }
@@ -882,12 +874,7 @@ LLVMRustOptimize(
           /*EagerChecks=*/true);
       OptimizerLastEPCallbacks.push_back(
         [Options](ModulePassManager &MPM, OptimizationLevel Level) {
-#if LLVM_VERSION_LT(16, 0)
-          MPM.addPass(ModuleMemorySanitizerPass(Options));
-          MPM.addPass(createModuleToFunctionPassAdaptor(MemorySanitizerPass(Options)));
-#else
           MPM.addPass(MemorySanitizerPass(Options));
-#endif
         }
       );
     }
@@ -912,11 +899,7 @@ LLVMRustOptimize(
             /*UseAfterScope=*/true,
             AsanDetectStackUseAfterReturnMode::Runtime,
           };
-#if LLVM_VERSION_LT(16, 0)
-          MPM.addPass(ModuleAddressSanitizerPass(opts));
-#else
           MPM.addPass(AddressSanitizerPass(opts));
-#endif
         }
       );
     }
@@ -1562,32 +1545,6 @@ LLVMRustParseBitcodeForLTO(LLVMContextRef Context,
   return wrap(std::move(*SrcOrError).release());
 }
 
-// Find the bitcode section in the object file data and return it as a slice.
-// Fail if the bitcode section is present but empty.
-//
-// On success, the return value is the pointer to the start of the slice and
-// `out_len` is filled with the (non-zero) length. On failure, the return value
-// is `nullptr` and `out_len` is set to zero.
-extern "C" const char*
-LLVMRustGetBitcodeSliceFromObjectData(const char *data,
-                                      size_t len,
-                                      size_t *out_len) {
-  *out_len = 0;
-
-  StringRef Data(data, len);
-  MemoryBufferRef Buffer(Data, ""); // The id is unused.
-
-  Expected<MemoryBufferRef> BitcodeOrError =
-    object::IRObjectFile::findBitcodeInMemBuffer(Buffer);
-  if (!BitcodeOrError) {
-    LLVMRustSetLastError(toString(BitcodeOrError.takeError()).c_str());
-    return nullptr;
-  }
-
-  *out_len = BitcodeOrError->getBufferSize();
-  return BitcodeOrError->getBufferStart();
-}
-
 // Find a section of an object file by name. Fail if the section is missing or
 // empty.
 extern "C" const char *LLVMRustGetSliceFromObjectDataByName(const char *data,