Update the minimum external LLVM to 10

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
           - name: mingw-check
             os: ubuntu-latest-xl
             env: {}
-          - name: x86_64-gnu-llvm-9
+          - name: x86_64-gnu-llvm-10
             os: ubuntu-latest-xl
             env: {}
           - name: x86_64-gnu-tools
@@ -265,7 +265,7 @@ jobs:
           - name: x86_64-gnu-distcheck
             os: ubuntu-latest-xl
             env: {}
-          - name: x86_64-gnu-llvm-9
+          - name: x86_64-gnu-llvm-10
             env:
               RUST_BACKTRACE: 1
             os: ubuntu-latest-xl

compiler/rustc_codegen_llvm/src/context.rs

@@ -101,10 +101,6 @@ fn to_llvm_tls_model(tls_model: TlsModel) -> llvm::ThreadLocalMode {
     }
 }
 
-fn strip_x86_address_spaces(data_layout: String) -> String {
-    data_layout.replace("-p270:32:32-p271:32:32-p272:64:64-", "-")
-}
-
 fn strip_powerpc64_vectors(data_layout: String) -> String {
     data_layout.replace("-v256:256:256-v512:512:512", "")
 }
@@ -119,11 +115,6 @@ pub unsafe fn create_module(
     let llmod = llvm::LLVMModuleCreateWithNameInContext(mod_name.as_ptr(), llcx);
 
     let mut target_data_layout = sess.target.data_layout.clone();
-    if llvm_util::get_version() < (10, 0, 0)
-        && (sess.target.arch == "x86" || sess.target.arch == "x86_64")
-    {
-        target_data_layout = strip_x86_address_spaces(target_data_layout);
-    }
     if llvm_util::get_version() < (12, 0, 0) && sess.target.arch == "powerpc64" {
         target_data_layout = strip_powerpc64_vectors(target_data_layout);
     }

compiler/rustc_llvm/build.rs

@@ -88,16 +88,6 @@ fn main() {
         "riscv",
     ];
 
-    let mut version_cmd = Command::new(&llvm_config);
-    version_cmd.arg("--version");
-    let version_output = output(&mut version_cmd);
-    let mut parts = version_output.split('.').take(2).filter_map(|s| s.parse::<u32>().ok());
-    let (major, _minor) = if let (Some(major), Some(minor)) = (parts.next(), parts.next()) {
-        (major, minor)
-    } else {
-        (8, 0)
-    };
-
     let required_components = &[
         "ipo",
         "bitreader",
@@ -123,10 +113,6 @@ fn main() {
         println!("cargo:rustc-cfg=llvm_component=\"{}\"", component);
     }
 
-    if major >= 9 {
-        println!("cargo:rustc-cfg=llvm_has_msp430_asm_parser");
-    }
-
     // Link in our own LLVM shims, compiled with the same flags as LLVM
     let mut cmd = Command::new(&llvm_config);
     cmd.arg("--cxxflags");

compiler/rustc_llvm/llvm-wrapper/ArchiveWrapper.cpp

@@ -91,11 +91,7 @@ extern "C" void LLVMRustDestroyArchive(LLVMRustArchiveRef RustArchive) {
 extern "C" LLVMRustArchiveIteratorRef
 LLVMRustArchiveIteratorNew(LLVMRustArchiveRef RustArchive) {
   Archive *Archive = RustArchive->getBinary();
-#if LLVM_VERSION_GE(10, 0)
   std::unique_ptr<Error> Err = std::make_unique<Error>(Error::success());
-#else
-  std::unique_ptr<Error> Err = llvm::make_unique<Error>(Error::success());
-#endif
   auto Cur = Archive->child_begin(*Err);
   if (*Err) {
     LLVMRustSetLastError(toString(std::move(*Err)).c_str());

compiler/rustc_llvm/llvm-wrapper/PassWrapper.cpp

@@ -65,13 +65,9 @@ extern "C" void LLVMInitializePasses() {
 }
 
 extern "C" void LLVMTimeTraceProfilerInitialize() {
-#if LLVM_VERSION_GE(10, 0)
   timeTraceProfilerInitialize(
       /* TimeTraceGranularity */ 0,
       /* ProcName */ "rustc");
-#else
-  timeTraceProfilerInitialize();
-#endif
 }
 
 extern "C" void LLVMTimeTraceProfilerFinish(const char* FileName) {
@@ -596,7 +592,6 @@ enum class LLVMRustFileType {
   ObjectFile,
 };
 
-#if LLVM_VERSION_GE(10, 0)
 static CodeGenFileType fromRust(LLVMRustFileType Type) {
   switch (Type) {
   case LLVMRustFileType::AssemblyFile:
@@ -607,18 +602,6 @@ static CodeGenFileType fromRust(LLVMRustFileType Type) {
     report_fatal_error("Bad FileType.");
   }
 }
-#else
-static TargetMachine::CodeGenFileType fromRust(LLVMRustFileType Type) {
-  switch (Type) {
-  case LLVMRustFileType::AssemblyFile:
-    return TargetMachine::CGFT_AssemblyFile;
-  case LLVMRustFileType::ObjectFile:
-    return TargetMachine::CGFT_ObjectFile;
-  default:
-    report_fatal_error("Bad FileType.");
-  }
-}
-#endif
 
 extern "C" LLVMRustResult
 LLVMRustWriteOutputFile(LLVMTargetMachineRef Target, LLVMPassManagerRef PMR,
@@ -868,13 +851,11 @@ LLVMRustOptimizeWithNewPassManager(
         }
       );
 #else
-#if LLVM_VERSION_GE(10, 0)
       PipelineStartEPCallbacks.push_back(
         [Options](ModulePassManager &MPM, PassBuilder::OptimizationLevel Level) {
           MPM.addPass(MemorySanitizerPass(Options));
         }
       );
-#endif
       OptimizerLastEPCallbacks.push_back(
         [Options](FunctionPassManager &FPM, PassBuilder::OptimizationLevel Level) {
           FPM.addPass(MemorySanitizerPass(Options));
@@ -892,13 +873,11 @@ LLVMRustOptimizeWithNewPassManager(
         }
       );
 #else
-#if LLVM_VERSION_GE(10, 0)
       PipelineStartEPCallbacks.push_back(
         [](ModulePassManager &MPM, PassBuilder::OptimizationLevel Level) {
           MPM.addPass(ThreadSanitizerPass());
         }
       );
-#endif
       OptimizerLastEPCallbacks.push_back(
         [](FunctionPassManager &FPM, PassBuilder::OptimizationLevel Level) {
           FPM.addPass(ThreadSanitizerPass());
@@ -989,13 +968,11 @@ LLVMRustOptimizeWithNewPassManager(
 
       MPM.addPass(AlwaysInlinerPass(EmitLifetimeMarkers));
 
-# if LLVM_VERSION_GE(10, 0)
       if (PGOOpt) {
         PB.addPGOInstrPassesForO0(
             MPM, DebugPassManager, PGOOpt->Action == PGOOptions::IRInstr,
             /*IsCS=*/false, PGOOpt->ProfileFile, PGOOpt->ProfileRemappingFile);
       }
-# endif
 #endif
     } else {
 #if LLVM_VERSION_GE(12, 0)
@@ -1366,11 +1343,7 @@ LLVMRustCreateThinLTOData(LLVMRustThinLTOModule *modules,
                           int num_modules,
                           const char **preserved_symbols,
                           int num_symbols) {
-#if LLVM_VERSION_GE(10, 0)
   auto Ret = std::make_unique<LLVMRustThinLTOData>();
-#else
-  auto Ret = llvm::make_unique<LLVMRustThinLTOData>();
-#endif
 
   // Load each module's summary and merge it into one combined index
   for (int i = 0; i < num_modules; i++) {
@@ -1455,23 +1428,13 @@ LLVMRustCreateThinLTOData(LLVMRustThinLTOModule *modules,
         ExportedGUIDs.insert(GUID);
     }
   }
-#if LLVM_VERSION_GE(10, 0)
   auto isExported = [&](StringRef ModuleIdentifier, ValueInfo VI) {
     const auto &ExportList = Ret->ExportLists.find(ModuleIdentifier);
     return (ExportList != Ret->ExportLists.end() &&
       ExportList->second.count(VI)) ||
       ExportedGUIDs.count(VI.getGUID());
   };
   thinLTOInternalizeAndPromoteInIndex(Ret->Index, isExported, isPrevailing);
-#else
-  auto isExported = [&](StringRef ModuleIdentifier, GlobalValue::GUID GUID) {
-    const auto &ExportList = Ret->ExportLists.find(ModuleIdentifier);
-    return (ExportList != Ret->ExportLists.end() &&
-      ExportList->second.count(GUID)) ||
-      ExportedGUIDs.count(GUID);
-  };
-  thinLTOInternalizeAndPromoteInIndex(Ret->Index, isExported);
-#endif
 
   return Ret.release();
 }
@@ -1628,11 +1591,7 @@ struct LLVMRustThinLTOBuffer {
 
 extern "C" LLVMRustThinLTOBuffer*
 LLVMRustThinLTOBufferCreate(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(10, 0)
   auto Ret = std::make_unique<LLVMRustThinLTOBuffer>();
-#else
-  auto Ret = llvm::make_unique<LLVMRustThinLTOBuffer>();
-#endif
   {
     raw_string_ostream OS(Ret->data);
     {

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -532,11 +532,6 @@ static DINode::DIFlags fromRust(LLVMRustDIFlags Flags) {
   if (isSet(Flags & LLVMRustDIFlags::FlagAppleBlock)) {
     Result |= DINode::DIFlags::FlagAppleBlock;
   }
-#if LLVM_VERSION_LT(10, 0)
-  if (isSet(Flags & LLVMRustDIFlags::FlagBlockByrefStruct)) {
-    Result |= DINode::DIFlags::FlagBlockByrefStruct;
-  }
-#endif
   if (isSet(Flags & LLVMRustDIFlags::FlagVirtual)) {
     Result |= DINode::DIFlags::FlagVirtual;
   }
@@ -901,9 +896,7 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateStaticVariable(
       unwrapDI<DIDescriptor>(Context), StringRef(Name, NameLen),
       StringRef(LinkageName, LinkageNameLen),
       unwrapDI<DIFile>(File), LineNo, unwrapDI<DIType>(Ty), IsLocalToUnit,
-#if LLVM_VERSION_GE(10, 0)
       /* isDefined */ true,
-#endif
       InitExpr, unwrapDIPtr<MDNode>(Decl),
       /* templateParams */ nullptr,
       AlignInBits);
@@ -1090,19 +1083,11 @@ inline section_iterator *unwrap(LLVMSectionIteratorRef SI) {
 
 extern "C" size_t LLVMRustGetSectionName(LLVMSectionIteratorRef SI,
                                          const char **Ptr) {
-#if LLVM_VERSION_GE(10, 0)
   auto NameOrErr = (*unwrap(SI))->getName();
   if (!NameOrErr)
     report_fatal_error(NameOrErr.takeError());
   *Ptr = NameOrErr->data();
   return NameOrErr->size();
-#else
-  StringRef Ret;
-  if (std::error_code EC = (*unwrap(SI))->getName(Ret))
-    report_fatal_error(EC.message());
-  *Ptr = Ret.data();
-  return Ret.size();
-#endif
 }
 
 // LLVMArrayType function does not support 64-bit ElementCount
@@ -1441,47 +1426,28 @@ extern "C" LLVMValueRef LLVMRustBuildMemCpy(LLVMBuilderRef B,
                                             LLVMValueRef Dst, unsigned DstAlign,
                                             LLVMValueRef Src, unsigned SrcAlign,
                                             LLVMValueRef Size, bool IsVolatile) {
-#if LLVM_VERSION_GE(10, 0)
   return wrap(unwrap(B)->CreateMemCpy(
       unwrap(Dst), MaybeAlign(DstAlign),
       unwrap(Src), MaybeAlign(SrcAlign),
       unwrap(Size), IsVolatile));
-#else
-  return wrap(unwrap(B)->CreateMemCpy(
-      unwrap(Dst), DstAlign,
-      unwrap(Src), SrcAlign,
-      unwrap(Size), IsVolatile));
-#endif
 }
 
 extern "C" LLVMValueRef LLVMRustBuildMemMove(LLVMBuilderRef B,
                                              LLVMValueRef Dst, unsigned DstAlign,
                                              LLVMValueRef Src, unsigned SrcAlign,
                                              LLVMValueRef Size, bool IsVolatile) {
-#if LLVM_VERSION_GE(10, 0)
   return wrap(unwrap(B)->CreateMemMove(
       unwrap(Dst), MaybeAlign(DstAlign),
       unwrap(Src), MaybeAlign(SrcAlign),
       unwrap(Size), IsVolatile));
-#else
-  return wrap(unwrap(B)->CreateMemMove(
-      unwrap(Dst), DstAlign,
-      unwrap(Src), SrcAlign,
-      unwrap(Size), IsVolatile));
-#endif
 }
 
 extern "C" LLVMValueRef LLVMRustBuildMemSet(LLVMBuilderRef B,
                                             LLVMValueRef Dst, unsigned DstAlign,
                                             LLVMValueRef Val,
                                             LLVMValueRef Size, bool IsVolatile) {
-#if LLVM_VERSION_GE(10, 0)
   return wrap(unwrap(B)->CreateMemSet(
       unwrap(Dst), unwrap(Val), unwrap(Size), MaybeAlign(DstAlign), IsVolatile));
-#else
-  return wrap(unwrap(B)->CreateMemSet(
-      unwrap(Dst), unwrap(Val), unwrap(Size), DstAlign, IsVolatile));
-#endif
 }
 
 extern "C" LLVMValueRef
@@ -1667,11 +1633,7 @@ struct LLVMRustModuleBuffer {
 
 extern "C" LLVMRustModuleBuffer*
 LLVMRustModuleBufferCreate(LLVMModuleRef M) {
-#if LLVM_VERSION_GE(10, 0)
   auto Ret = std::make_unique<LLVMRustModuleBuffer>();
-#else
-  auto Ret = llvm::make_unique<LLVMRustModuleBuffer>();
-#endif
   {
     raw_string_ostream OS(Ret->data);
     {

compiler/rustc_llvm/src/lib.rs

@@ -125,10 +125,7 @@ pub fn initialize_available_targets() {
         LLVMInitializeMSP430TargetInfo,
         LLVMInitializeMSP430Target,
         LLVMInitializeMSP430TargetMC,
-        LLVMInitializeMSP430AsmPrinter
-    );
-    init_target!(
-        all(llvm_component = "msp430", llvm_has_msp430_asm_parser),
+        LLVMInitializeMSP430AsmPrinter,
         LLVMInitializeMSP430AsmParser
     );
     init_target!(

library/core/src/num/dec2flt/algorithm.rs

@@ -62,10 +62,9 @@ mod fpu_precision {
         // any `u16`
         unsafe {
             asm!(
-                "fldcw ({})",
+                "fldcw word ptr [{}]",
                 in(reg) &cw,
-                // FIXME: We are using ATT syntax to support LLVM 8 and LLVM 9.
-                options(att_syntax, nostack),
+                options(nostack),
             )
         }
     }
@@ -87,10 +86,9 @@ mod fpu_precision {
         // any `u16`
         unsafe {
             asm!(
-                "fnstcw ({})",
+                "fnstcw word ptr [{}]",
                 in(reg) &mut cw,
-                // FIXME: We are using ATT syntax to support LLVM 8 and LLVM 9.
-                options(att_syntax, nostack),
+                options(nostack),
             )
         }
 

library/profiler_builtins/build.rs

@@ -24,13 +24,11 @@ fn main() {
         "InstrProfilingPlatformLinux.c",
         "InstrProfilingPlatformOther.c",
         "InstrProfilingPlatformWindows.c",
+        "InstrProfilingRuntime.cpp",
         "InstrProfilingUtil.c",
         "InstrProfilingValue.c",
         "InstrProfilingVersionVar.c",
         "InstrProfilingWriter.c",
-        // This file was renamed in LLVM 10.
-        "InstrProfilingRuntime.cc",
-        "InstrProfilingRuntime.cpp",
         // These files were added in LLVM 11.
         "InstrProfilingInternal.c",
         "InstrProfilingBiasVar.c",

library/std/src/sys/sgx/abi/mem.rs

@@ -36,10 +36,9 @@ pub fn image_base() -> u64 {
     let base: u64;
     unsafe {
         asm!(
-            "lea IMAGE_BASE(%rip), {}",
+            "lea {}, qword ptr [rip + IMAGE_BASE]",
             lateout(reg) base,
-            // NOTE(#76738): ATT syntax is used to support LLVM 8 and 9.
-            options(att_syntax, nostack, preserves_flags, nomem, pure),
+            options(nostack, preserves_flags, nomem, pure),
         )
     };
     base

library/std/src/sys/sgx/ext/arch.rs

@@ -36,8 +36,7 @@ pub fn egetkey(request: &Align512<[u8; 512]>) -> Result<Align16<[u8; 16]>, u32>
             inlateout("eax") ENCLU_EGETKEY => error,
             in("rbx") request,
             in("rcx") out.as_mut_ptr(),
-            // NOTE(#76738): ATT syntax is used to support LLVM 8 and 9.
-            options(att_syntax, nostack),
+            options(nostack),
         );
 
         match error {
@@ -66,8 +65,7 @@ pub fn ereport(
             in("rbx") targetinfo,
             in("rcx") reportdata,
             in("rdx") report.as_mut_ptr(),
-            // NOTE(#76738): ATT syntax is used to support LLVM 8 and 9.
-            options(att_syntax, preserves_flags, nostack),
+            options(preserves_flags, nostack),
         );
 
         report.assume_init()