WIP full LLVM 20 support

Author: aykevl

.github/workflows/build-macos.yml

@@ -45,7 +45,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-${{ matrix.os }}-v1
+          key: llvm-source-20-${{ matrix.os }}-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -70,7 +70,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-19-${{ matrix.os }}-v1
+          key: llvm-build-20-${{ matrix.os }}-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'

.github/workflows/linux.yml

@@ -48,7 +48,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-linux-alpine-v1
+          key: llvm-source-20-linux-alpine-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -73,7 +73,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-19-linux-alpine-v1
+          key: llvm-build-20-linux-alpine-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -197,7 +197,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-linux-asserts-v1
+          key: llvm-source-20-linux-asserts-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -222,7 +222,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-19-linux-asserts-v1
+          key: llvm-build-20-linux-asserts-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'
@@ -304,7 +304,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-linux-v1
+          key: llvm-source-20-linux-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -329,7 +329,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-19-linux-${{ matrix.goarch }}-v3
+          key: llvm-build-20-linux-${{ matrix.goarch }}-v3
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'

.github/workflows/llvm.yml

@@ -35,8 +35,8 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: |
-            tinygo/llvm-19
-            ghcr.io/${{ github.repository_owner }}/llvm-19
+            tinygo/llvm-20
+            ghcr.io/${{ github.repository_owner }}/llvm-20
           tags: |
             type=sha,format=long
             type=raw,value=latest

.github/workflows/nix.yml

@@ -29,7 +29,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-linux-nix-v1
+          key: llvm-source-20-linux-nix-v1
           path: |
             llvm-project/compiler-rt
       - name: Download LLVM source

.github/workflows/sizediff.yml

@@ -30,7 +30,7 @@ jobs:
         uses: actions/cache@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-sizediff-v1
+          key: llvm-source-20-sizediff-v1
           path: |
             llvm-project/compiler-rt
       - name: Download LLVM source

.github/workflows/windows.yml

@@ -47,7 +47,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-source
         with:
-          key: llvm-source-19-windows-v1
+          key: llvm-source-20-windows-v1
           path: |
             llvm-project/clang/lib/Headers
             llvm-project/clang/include
@@ -72,7 +72,7 @@ jobs:
         uses: actions/cache/restore@v4
         id: cache-llvm-build
         with:
-          key: llvm-build-19-windows-v1
+          key: llvm-build-20-windows-v1
           path: llvm-build
       - name: Build LLVM
         if: steps.cache-llvm-build.outputs.cache-hit != 'true'

GNUmakefile

@@ -243,7 +243,7 @@ gen-device-renesas: build/gen-device-svd
 	GO111MODULE=off $(GO) fmt ./src/device/renesas
 
 $(LLVM_PROJECTDIR)/llvm:
-	git clone -b xtensa_release_19.1.2 --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
+	git clone -b release/esp_20.x --depth=1 https://github.com/espressif/llvm-project $(LLVM_PROJECTDIR)
 llvm-source: $(LLVM_PROJECTDIR)/llvm ## Get LLVM sources
 
 # Configure LLVM.

builder/cc1as.cpp

@@ -144,8 +144,6 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
             .Default(llvm::DebugCompressionType::None);
   }
 
-  Opts.RelaxELFRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
-  Opts.SSE2AVX = Args.hasArg(OPT_msse2avx);
   if (auto *DwarfFormatArg = Args.getLastArg(OPT_gdwarf64, OPT_gdwarf32))
     Opts.Dwarf64 = DwarfFormatArg->getOption().matches(OPT_gdwarf64);
   Opts.DwarfVersion = getLastArgIntValue(Args, OPT_dwarf_version_EQ, 2, Diags);
@@ -236,6 +234,9 @@ bool AssemblerInvocation::CreateFromArgs(AssemblerInvocation &Opts,
   Opts.EmitCompactUnwindNonCanonical =
       Args.hasArg(OPT_femit_compact_unwind_non_canonical);
   Opts.Crel = Args.hasArg(OPT_crel);
+  Opts.ImplicitMapsyms = Args.hasArg(OPT_mmapsyms_implicit);
+  Opts.X86RelaxRelocations = !Args.hasArg(OPT_mrelax_relocations_no);
+  Opts.X86Sse2Avx = Args.hasArg(OPT_msse2avx);
 
   Opts.AsSecureLogFile = Args.getLastArgValue(OPT_as_secure_log_file);
 
@@ -294,8 +295,9 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
   MCOptions.EmitCompactUnwindNonCanonical = Opts.EmitCompactUnwindNonCanonical;
   MCOptions.MCSaveTempLabels = Opts.SaveTemporaryLabels;
   MCOptions.Crel = Opts.Crel;
-  MCOptions.X86RelaxRelocations = Opts.RelaxELFRelocations;
-  MCOptions.X86Sse2Avx = Opts.SSE2AVX;
+  MCOptions.ImplicitMapSyms = Opts.ImplicitMapsyms;
+  MCOptions.X86RelaxRelocations = Opts.X86RelaxRelocations;
+  MCOptions.X86Sse2Avx = Opts.X86Sse2Avx;
   MCOptions.CompressDebugSections = Opts.CompressDebugSections;
   MCOptions.AsSecureLogFile = Opts.AsSecureLogFile;
 
@@ -343,10 +345,6 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
   // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
   std::unique_ptr<MCObjectFileInfo> MOFI(
       TheTarget->createMCObjectFileInfo(Ctx, PIC));
-  if (Opts.DarwinTargetVariantTriple)
-    MOFI->setDarwinTargetVariantTriple(*Opts.DarwinTargetVariantTriple);
-  if (!Opts.DarwinTargetVariantSDKVersion.empty())
-    MOFI->setDarwinTargetVariantSDKVersion(Opts.DarwinTargetVariantSDKVersion);
   Ctx.setObjectFileInfo(MOFI.get());
 
   if (Opts.GenDwarfForAssembly)
@@ -428,6 +426,13 @@ static bool ExecuteAssemblerImpl(AssemblerInvocation &Opts,
     Str.reset(TheTarget->createMCObjectStreamer(
         T, Ctx, std::move(MAB), std::move(OW), std::move(CE), *STI));
     Str.get()->initSections(Opts.NoExecStack, *STI);
+    if (T.isOSBinFormatMachO() && T.isOSDarwin()) {
+      Triple *TVT = Opts.DarwinTargetVariantTriple
+                        ? &*Opts.DarwinTargetVariantTriple
+                        : nullptr;
+      Str->emitVersionForTarget(T, VersionTuple(), TVT,
+                                Opts.DarwinTargetVariantSDKVersion);
+    }
   }
 
   // When -fembed-bitcode is passed to clang_as, a 1-byte marker

builder/cc1as.h

@@ -45,10 +45,6 @@ struct AssemblerInvocation {
   LLVM_PREFERRED_TYPE(bool)
   unsigned GenDwarfForAssembly : 1;
   LLVM_PREFERRED_TYPE(bool)
-  unsigned RelaxELFRelocations : 1;
-  LLVM_PREFERRED_TYPE(bool)
-  unsigned SSE2AVX : 1;
-  LLVM_PREFERRED_TYPE(bool)
   unsigned Dwarf64 : 1;
   unsigned DwarfVersion;
   std::string DwarfDebugFlags;
@@ -117,6 +113,13 @@ struct AssemblerInvocation {
 
   LLVM_PREFERRED_TYPE(bool)
   unsigned Crel : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned ImplicitMapsyms : 1;
+
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned X86RelaxRelocations : 1;
+  LLVM_PREFERRED_TYPE(bool)
+  unsigned X86Sse2Avx : 1;
 
   /// The name of the relocation model to use.
   std::string RelocationModel;
@@ -148,7 +151,6 @@ struct AssemblerInvocation {
     ShowInst = 0;
     ShowEncoding = 0;
     RelaxAll = 0;
-    SSE2AVX = 0;
     NoExecStack = 0;
     FatalWarnings = 0;
     NoWarn = 0;
@@ -160,6 +162,9 @@ struct AssemblerInvocation {
     EmitDwarfUnwind = EmitDwarfUnwindType::Default;
     EmitCompactUnwindNonCanonical = false;
     Crel = false;
+    ImplicitMapsyms = 0;
+    X86RelaxRelocations = 0;
+    X86Sse2Avx = 0;
   }
 
   static bool CreateFromArgs(AssemblerInvocation &Res,

builder/clang.cpp

@@ -60,7 +60,7 @@ bool tinygo_clang_driver(int argc, char **argv) {
 			}
 
 			// Create the actual diagnostics engine.
-			Clang->createDiagnostics();
+			Clang->createDiagnostics(*llvm::vfs::getRealFileSystem());
 			if (!Clang->hasDiagnostics()) {
 				return false;
 			}