WIP use LLVM 19

.github/workflows/test.yml

@@ -34,7 +34,7 @@ jobs:
     runs-on: ubuntu-20.04
     strategy:
       matrix:
-        llvm: [14, 15, 16, 17, 18]
+        llvm: [14, 15, 16, 17, 18, 19]
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -52,6 +52,6 @@ jobs:
         run:
           go test -v -tags=llvm${{ matrix.llvm }}
       - name: Test default LLVM
-        if: matrix.llvm == 18
+        if: matrix.llvm == 19
         run:
           go test -v

README.markdown

@@ -4,13 +4,13 @@ This library provides bindings to a system-installed LLVM.
 
 Currently supported:
 
-  * LLVM 17, 16, 15 and 14 from [apt.llvm.org](http://apt.llvm.org/) on Debian/Ubuntu.
-  * LLVM 17, 16, 15 and 14 from Homebrew on macOS.
-  * LLVM 15 with a manually built LLVM through the `byollvm` build tag. You
+  * LLVM 19, 18, 17, 16, 15 and 14 from [apt.llvm.org](http://apt.llvm.org/) on Debian/Ubuntu.
+  * LLVM 18, 17, 16, 15 and 14 from Homebrew on macOS.
+  * LLVM 19 with a manually built LLVM through the `byollvm` build tag. You
     need to set up `CFLAGS`/`LDFLAGS` etc yourself in this case.
 
-You can select the LLVM version using a build tag, for example `-tags=llvm14`
-to use LLVM 14.
+You can select the LLVM version using a build tag, for example `-tags=llvm17`
+to use LLVM 17.
 
 ## Usage
 

backports.cpp

@@ -48,3 +48,17 @@ LLVMMemoryBufferRef LLVMGoWriteThinLTOBitcodeToMemoryBuffer(LLVMModuleRef M) {
 #endif
   return llvm::wrap(llvm::MemoryBuffer::getMemBufferCopy(OS.str()).release());
 }
+
+void LLVMGoDIBuilderInsertDbgValueRecordAtEnd(
+    LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
+    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block) {
+#if LLVM_VERSION_MAJOR >= 19
+  // Note: this returns a LLVMDbgRecordRef. Previously, InsertValueAtEnd would
+  // return a Value. But since the type changed, and I'd like to keep the API
+  // consistent across LLVM versions, I decided to drop the return value.
+  LLVMDIBuilderInsertDbgValueRecordAtEnd(Builder, Val, VarInfo, Expr, DebugLoc, Block);
+#else
+  // Old llvm.dbg.* API.
+  LLVMDIBuilderInsertDbgValueAtEnd(Builder, Val, VarInfo, Expr, DebugLoc, Block);
+#endif
+}

backports.h

@@ -10,8 +10,9 @@ void LLVMGlobalObjectAddMetadata(LLVMValueRef objValue, unsigned KindID, LLVMMet
 
 LLVMMemoryBufferRef LLVMGoWriteThinLTOBitcodeToMemoryBuffer(LLVMModuleRef M);
 
-LLVMMetadataRef LLVMGoDIBuilderCreateExpression(LLVMDIBuilderRef Builder,
-                                                uint64_t *Addr, size_t Length);
+void LLVMGoDIBuilderInsertDbgValueRecordAtEnd(
+    LLVMDIBuilderRef Builder, LLVMValueRef Val, LLVMMetadataRef VarInfo,
+    LLVMMetadataRef Expr, LLVMMetadataRef DebugLoc, LLVMBasicBlockRef Block);
 
 #ifdef __cplusplus
 }

dibuilder.go

@@ -610,22 +610,12 @@ func (d *DIBuilder) CreateExpression(addr []uint64) Metadata {
 	return Metadata{C: result}
 }
 
-// InsertDeclareAtEnd inserts a call to llvm.dbg.declare at the end of the
-// specified basic block for the given value and associated debug metadata.
-func (d *DIBuilder) InsertDeclareAtEnd(v Value, diVarInfo, expr Metadata, l DebugLoc, bb BasicBlock) Value {
-	loc := C.LLVMDIBuilderCreateDebugLocation(
-		d.m.Context().C, C.uint(l.Line), C.uint(l.Col), l.Scope.C, l.InlinedAt.C)
-	result := C.LLVMDIBuilderInsertDeclareAtEnd(d.ref, v.C, diVarInfo.C, expr.C, loc, bb.C)
-	return Value{C: result}
-}
-
 // InsertValueAtEnd inserts a call to llvm.dbg.value at the end of the
 // specified basic block for the given value and associated debug metadata.
-func (d *DIBuilder) InsertValueAtEnd(v Value, diVarInfo, expr Metadata, l DebugLoc, bb BasicBlock) Value {
+func (d *DIBuilder) InsertValueAtEnd(v Value, diVarInfo, expr Metadata, l DebugLoc, bb BasicBlock) {
 	loc := C.LLVMDIBuilderCreateDebugLocation(
 		d.m.Context().C, C.uint(l.Line), C.uint(l.Col), l.Scope.C, l.InlinedAt.C)
-	result := C.LLVMDIBuilderInsertDbgValueAtEnd(d.ref, v.C, diVarInfo.C, expr.C, loc, bb.C)
-	return Value{C: result}
+	C.LLVMGoDIBuilderInsertDbgValueRecordAtEnd(d.ref, v.C, diVarInfo.C, expr.C, loc, bb.C)
 }
 
 func (v Value) SetSubprogram(sp Metadata) {

ir.go

@@ -921,7 +921,6 @@ func AlignOf(t Type) (v Value)             { v.C = C.LLVMAlignOf(t.C); return }
 func SizeOf(t Type) (v Value)              { v.C = C.LLVMSizeOf(t.C); return }
 func ConstNeg(v Value) (rv Value)          { rv.C = C.LLVMConstNeg(v.C); return }
 func ConstNSWNeg(v Value) (rv Value)       { rv.C = C.LLVMConstNSWNeg(v.C); return }
-func ConstNUWNeg(v Value) (rv Value)       { rv.C = C.LLVMConstNUWNeg(v.C); return }
 func ConstNot(v Value) (rv Value)          { rv.C = C.LLVMConstNot(v.C); return }
 func ConstAdd(lhs, rhs Value) (v Value)    { v.C = C.LLVMConstAdd(lhs.C, rhs.C); return }
 func ConstNSWAdd(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNSWAdd(lhs.C, rhs.C); return }
@@ -934,17 +933,6 @@ func ConstNSWMul(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNSWMul(lhs.C, rhs.
 func ConstNUWMul(lhs, rhs Value) (v Value) { v.C = C.LLVMConstNUWMul(lhs.C, rhs.C); return }
 func ConstXor(lhs, rhs Value) (v Value)    { v.C = C.LLVMConstXor(lhs.C, rhs.C); return }
 
-func ConstICmp(pred IntPredicate, lhs, rhs Value) (v Value) {
-	v.C = C.LLVMConstICmp(C.LLVMIntPredicate(pred), lhs.C, rhs.C)
-	return
-}
-func ConstFCmp(pred FloatPredicate, lhs, rhs Value) (v Value) {
-	v.C = C.LLVMConstFCmp(C.LLVMRealPredicate(pred), lhs.C, rhs.C)
-	return
-}
-
-func ConstShl(lhs, rhs Value) (v Value) { v.C = C.LLVMConstShl(lhs.C, rhs.C); return }
-
 func ConstGEP(t Type, v Value, indices []Value) (rv Value) {
 	ptr, nvals := llvmValueRefs(indices)
 	rv.C = C.LLVMConstGEP2(t.C, v.C, ptr, nvals)
@@ -1660,12 +1648,6 @@ func (b Builder) CreateNSWNeg(v Value, name string) (rv Value) {
 	rv.C = C.LLVMBuildNSWNeg(b.C, v.C, cname)
 	return
 }
-func (b Builder) CreateNUWNeg(v Value, name string) (rv Value) {
-	cname := C.CString(name)
-	defer C.free(unsafe.Pointer(cname))
-	rv.C = C.LLVMBuildNUWNeg(b.C, v.C, cname)
-	return
-}
 func (b Builder) CreateFNeg(v Value, name string) (rv Value) {
 	cname := C.CString(name)
 	defer C.free(unsafe.Pointer(cname))

llvm_config_linux_llvm18.go

@@ -1,4 +1,4 @@
-//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm16 && !llvm17
+//go:build !byollvm && linux && llvm18
 
 package llvm
 

llvm_config_linux_llvm19.go

@@ -0,0 +1,10 @@
+//go:build !byollvm && linux && !llvm14 && !llvm15 && !llvm16 && !llvm17 && !llvm18
+
+package llvm
+
+// #cgo CPPFLAGS: -I/usr/include/llvm-19 -I/usr/include/llvm-c-19 -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+// #cgo CXXFLAGS: -std=c++17
+// #cgo LDFLAGS: /usr/lib/llvm-19/lib/libLLVM.so
+import "C"
+
+type run_build_sh int