Auto merge of #109862 - klensy:llvm-dd, r=nikic

llvm: replace some deprecated functions, add fixmes

Replace some deprecated llvm functions, add FIXME's (for simpler future work), replace some rust custom functions with llvm ones.

compiler/rustc_codegen_llvm/src/asm.rs

@@ -381,7 +381,7 @@ impl<'tcx> AsmMethods<'tcx> for CodegenCx<'_, 'tcx> {
         }
 
         unsafe {
-            llvm::LLVMRustAppendModuleInlineAsm(
+            llvm::LLVMAppendModuleInlineAsm(
                 self.llmod,
                 template_str.as_ptr().cast(),
                 template_str.len(),

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -904,9 +904,9 @@ unsafe fn embed_bitcode(
         // We need custom section flags, so emit module-level inline assembly.
         let section_flags = if cgcx.is_pe_coff { "n" } else { "e" };
         let asm = create_section_with_flags_asm(".llvmbc", section_flags, bitcode);
-        llvm::LLVMRustAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
+        llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
         let asm = create_section_with_flags_asm(".llvmcmd", section_flags, cmdline.as_bytes());
-        llvm::LLVMRustAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
+        llvm::LLVMAppendModuleInlineAsm(llmod, asm.as_ptr().cast(), asm.len());
     }
 }
 

compiler/rustc_codegen_llvm/src/builder.rs

@@ -2,7 +2,7 @@ use crate::abi::FnAbiLlvmExt;
 use crate::attributes;
 use crate::common::Funclet;
 use crate::context::CodegenCx;
-use crate::llvm::{self, AtomicOrdering, AtomicRmwBinOp, BasicBlock};
+use crate::llvm::{self, AtomicOrdering, AtomicRmwBinOp, BasicBlock, False, True};
 use crate::type_::Type;
 use crate::type_of::LayoutLlvmExt;
 use crate::value::Value;
@@ -841,7 +841,15 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
     }
 
     fn intcast(&mut self, val: &'ll Value, dest_ty: &'ll Type, is_signed: bool) -> &'ll Value {
-        unsafe { llvm::LLVMRustBuildIntCast(self.llbuilder, val, dest_ty, is_signed) }
+        unsafe {
+            llvm::LLVMBuildIntCast2(
+                self.llbuilder,
+                val,
+                dest_ty,
+                if is_signed { True } else { False },
+                UNNAMED,
+            )
+        }
     }
 
     fn pointercast(&mut self, val: &'ll Value, dest_ty: &'ll Type) -> &'ll Value {
@@ -1001,11 +1009,11 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
     fn cleanup_pad(&mut self, parent: Option<&'ll Value>, args: &[&'ll Value]) -> Funclet<'ll> {
         let name = cstr!("cleanuppad");
         let ret = unsafe {
-            llvm::LLVMRustBuildCleanupPad(
+            llvm::LLVMBuildCleanupPad(
                 self.llbuilder,
                 parent,
-                args.len() as c_uint,
                 args.as_ptr(),
+                args.len() as c_uint,
                 name.as_ptr(),
             )
         };
@@ -1014,7 +1022,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
     fn cleanup_ret(&mut self, funclet: &Funclet<'ll>, unwind: Option<&'ll BasicBlock>) {
         unsafe {
-            llvm::LLVMRustBuildCleanupRet(self.llbuilder, funclet.cleanuppad(), unwind)
+            llvm::LLVMBuildCleanupRet(self.llbuilder, funclet.cleanuppad(), unwind)
                 .expect("LLVM does not have support for cleanupret");
         }
     }
@@ -1022,11 +1030,11 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
     fn catch_pad(&mut self, parent: &'ll Value, args: &[&'ll Value]) -> Funclet<'ll> {
         let name = cstr!("catchpad");
         let ret = unsafe {
-            llvm::LLVMRustBuildCatchPad(
+            llvm::LLVMBuildCatchPad(
                 self.llbuilder,
                 parent,
-                args.len() as c_uint,
                 args.as_ptr(),
+                args.len() as c_uint,
                 name.as_ptr(),
             )
         };
@@ -1041,7 +1049,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
     ) -> &'ll Value {
         let name = cstr!("catchswitch");
         let ret = unsafe {
-            llvm::LLVMRustBuildCatchSwitch(
+            llvm::LLVMBuildCatchSwitch(
                 self.llbuilder,
                 parent,
                 unwind,
@@ -1052,7 +1060,7 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
         let ret = ret.expect("LLVM does not have support for catchswitch");
         for handler in handlers {
             unsafe {
-                llvm::LLVMRustAddHandler(ret, handler);
+                llvm::LLVMAddHandler(ret, handler);
             }
         }
         ret
@@ -1376,8 +1384,7 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
     }
 
     pub fn catch_ret(&mut self, funclet: &Funclet<'ll>, unwind: &'ll BasicBlock) -> &'ll Value {
-        let ret =
+        let ret = unsafe { llvm::LLVMBuildCatchRet(self.llbuilder, funclet.cleanuppad(), unwind) };
-            unsafe { llvm::LLVMRustBuildCatchRet(self.llbuilder, funclet.cleanuppad(), unwind) };
         ret.expect("LLVM does not have support for catchret")
     }
 

compiler/rustc_codegen_llvm/src/consts.rs

@@ -7,7 +7,6 @@ use crate::type_::Type;
 use crate::type_of::LayoutLlvmExt;
 use crate::value::Value;
 use cstr::cstr;
-use libc::c_uint;
 use rustc_codegen_ssa::traits::*;
 use rustc_hir::def_id::DefId;
 use rustc_middle::middle::codegen_fn_attrs::{CodegenFnAttrFlags, CodegenFnAttrs};
@@ -486,10 +485,10 @@ impl<'ll> StaticMethods for CodegenCx<'ll, '_> {
             // go into custom sections of the wasm executable.
             if self.tcx.sess.target.is_like_wasm {
                 if let Some(section) = attrs.link_section {
-                    let section = llvm::LLVMMDStringInContext(
+                    let section = llvm::LLVMMDStringInContext2(
                         self.llcx,
                         section.as_str().as_ptr().cast(),
-                        section.as_str().len() as c_uint,
+                        section.as_str().len(),
                     );
                     assert!(alloc.provenance().ptrs().is_empty());
 
@@ -498,17 +497,15 @@ impl<'ll> StaticMethods for CodegenCx<'ll, '_> {
                     // as part of the interpreter execution).
                     let bytes =
                         alloc.inspect_with_uninit_and_ptr_outside_interpreter(0..alloc.len());
-                    let alloc = llvm::LLVMMDStringInContext(
+                    let alloc =
-                        self.llcx,
+                        llvm::LLVMMDStringInContext2(self.llcx, bytes.as_ptr().cast(), bytes.len());
-                        bytes.as_ptr().cast(),
-                        bytes.len() as c_uint,
-                    );
                     let data = [section, alloc];
-                    let meta = llvm::LLVMMDNodeInContext(self.llcx, data.as_ptr(), 2);
+                    let meta = llvm::LLVMMDNodeInContext2(self.llcx, data.as_ptr(), data.len());
+                    let val = llvm::LLVMMetadataAsValue(self.llcx, meta);
                     llvm::LLVMAddNamedMetadataOperand(
                         self.llmod,
                         "wasm.custom_sections\0".as_ptr().cast(),
-                        meta,
+                        val,
                     );
                 }
             } else {

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -864,8 +864,6 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
         );
 
         if tcx.sess.opts.unstable_opts.profile {
-            let cu_desc_metadata =
-                llvm::LLVMRustMetadataAsValue(debug_context.llcontext, unit_metadata);
             let default_gcda_path = &output_filenames.with_extension("gcda");
             let gcda_path =
                 tcx.sess.opts.unstable_opts.profile_emit.as_ref().unwrap_or(default_gcda_path);
@@ -873,20 +871,17 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
             let gcov_cu_info = [
                 path_to_mdstring(debug_context.llcontext, &output_filenames.with_extension("gcno")),
                 path_to_mdstring(debug_context.llcontext, gcda_path),
-                cu_desc_metadata,
+                unit_metadata,
             ];
-            let gcov_metadata = llvm::LLVMMDNodeInContext(
+            let gcov_metadata = llvm::LLVMMDNodeInContext2(
                 debug_context.llcontext,
                 gcov_cu_info.as_ptr(),
-                gcov_cu_info.len() as c_uint,
+                gcov_cu_info.len(),
             );
+            let val = llvm::LLVMMetadataAsValue(debug_context.llcontext, gcov_metadata);
 
             let llvm_gcov_ident = cstr!("llvm.gcov");
-            llvm::LLVMAddNamedMetadataOperand(
+            llvm::LLVMAddNamedMetadataOperand(debug_context.llmod, llvm_gcov_ident.as_ptr(), val);
-                debug_context.llmod,
-                llvm_gcov_ident.as_ptr(),
-                gcov_metadata,
-            );
         }
 
         // Insert `llvm.ident` metadata on the wasm targets since that will
@@ -907,15 +902,9 @@ pub fn build_compile_unit_di_node<'ll, 'tcx>(
         return unit_metadata;
     };
 
-    fn path_to_mdstring<'ll>(llcx: &'ll llvm::Context, path: &Path) -> &'ll Value {
+    fn path_to_mdstring<'ll>(llcx: &'ll llvm::Context, path: &Path) -> &'ll llvm::Metadata {
         let path_str = path_to_c_string(path);
-        unsafe {
+        unsafe { llvm::LLVMMDStringInContext2(llcx, path_str.as_ptr(), path_str.as_bytes().len()) }
-            llvm::LLVMMDStringInContext(
-                llcx,
-                path_str.as_ptr(),
-                path_str.as_bytes().len() as c_uint,
-            )
-        }
     }
 }
 

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -209,8 +209,7 @@ impl<'ll> DebugInfoBuilderMethods for Builder<'_, 'll, '_> {
 
     fn set_dbg_loc(&mut self, dbg_loc: &'ll DILocation) {
         unsafe {
-            let dbg_loc_as_llval = llvm::LLVMRustMetadataAsValue(self.cx().llcx, dbg_loc);
+            llvm::LLVMSetCurrentDebugLocation2(self.llbuilder, dbg_loc);
-            llvm::LLVMSetCurrentDebugLocation(self.llbuilder, dbg_loc_as_llval);
         }
     }
 

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -1018,7 +1018,7 @@ extern "C" {
     pub fn LLVMSetDataLayout(M: &Module, Triple: *const c_char);
 
     /// See Module::setModuleInlineAsm.
-    pub fn LLVMRustAppendModuleInlineAsm(M: &Module, Asm: *const c_char, AsmLen: size_t);
+    pub fn LLVMAppendModuleInlineAsm(M: &Module, Asm: *const c_char, Len: size_t);
 
     /// See llvm::LLVMTypeKind::getTypeID.
     pub fn LLVMRustGetTypeKind(Ty: &Type) -> TypeKind;
@@ -1065,7 +1065,7 @@ extern "C" {
 
     // Operations on other types
     pub fn LLVMVoidTypeInContext(C: &Context) -> &Type;
-    pub fn LLVMRustMetadataTypeInContext(C: &Context) -> &Type;
+    pub fn LLVMMetadataTypeInContext(C: &Context) -> &Type;
 
     // Operations on all values
     pub fn LLVMTypeOf(Val: &Value) -> &Type;
@@ -1084,7 +1084,12 @@ extern "C" {
     pub fn LLVMGetPoison(Ty: &Type) -> &Value;
 
     // Operations on metadata
+    // FIXME: deprecated, replace with LLVMMDStringInContext2
     pub fn LLVMMDStringInContext(C: &Context, Str: *const c_char, SLen: c_uint) -> &Value;
+
+    pub fn LLVMMDStringInContext2(C: &Context, Str: *const c_char, SLen: size_t) -> &Metadata;
+
+    // FIXME: deprecated, replace with LLVMMDNodeInContext2
     pub fn LLVMMDNodeInContext<'a>(
         C: &'a Context,
         Vals: *const &'a Value,
@@ -1123,6 +1128,8 @@ extern "C" {
         Packed: Bool,
     ) -> &'a Value;
 
+    // FIXME: replace with LLVMConstArray2 when bumped minimal version to llvm-17
+    // https://github.com/llvm/llvm-project/commit/35276f16e5a2cae0dfb49c0fbf874d4d2f177acc
     pub fn LLVMConstArray<'a>(
         ElementTy: &'a Type,
         ConstantVals: *const &'a Value,
@@ -1262,7 +1269,7 @@ extern "C" {
     pub fn LLVMDisposeBuilder<'a>(Builder: &'a mut Builder<'a>);
 
     // Metadata
-    pub fn LLVMSetCurrentDebugLocation<'a>(Builder: &Builder<'a>, L: &'a Value);
+    pub fn LLVMSetCurrentDebugLocation2<'a>(Builder: &Builder<'a>, Loc: &'a Metadata);
 
     // Terminators
     pub fn LLVMBuildRetVoid<'a>(B: &Builder<'a>) -> &'a Value;
@@ -1302,38 +1309,38 @@ extern "C" {
     pub fn LLVMBuildResume<'a>(B: &Builder<'a>, Exn: &'a Value) -> &'a Value;
     pub fn LLVMBuildUnreachable<'a>(B: &Builder<'a>) -> &'a Value;
 
-    pub fn LLVMRustBuildCleanupPad<'a>(
+    pub fn LLVMBuildCleanupPad<'a>(
         B: &Builder<'a>,
         ParentPad: Option<&'a Value>,
-        ArgCnt: c_uint,
         Args: *const &'a Value,
+        NumArgs: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMRustBuildCleanupRet<'a>(
+    pub fn LLVMBuildCleanupRet<'a>(
         B: &Builder<'a>,
         CleanupPad: &'a Value,
-        UnwindBB: Option<&'a BasicBlock>,
+        BB: Option<&'a BasicBlock>,
     ) -> Option<&'a Value>;
-    pub fn LLVMRustBuildCatchPad<'a>(
+    pub fn LLVMBuildCatchPad<'a>(
         B: &Builder<'a>,
         ParentPad: &'a Value,
-        ArgCnt: c_uint,
         Args: *const &'a Value,
+        NumArgs: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMRustBuildCatchRet<'a>(
+    pub fn LLVMBuildCatchRet<'a>(
         B: &Builder<'a>,
-        Pad: &'a Value,
+        CatchPad: &'a Value,
         BB: &'a BasicBlock,
     ) -> Option<&'a Value>;
-    pub fn LLVMRustBuildCatchSwitch<'a>(
+    pub fn LLVMBuildCatchSwitch<'a>(
         Builder: &Builder<'a>,
         ParentPad: Option<&'a Value>,
-        BB: Option<&'a BasicBlock>,
+        UnwindBB: Option<&'a BasicBlock>,
         NumHandlers: c_uint,
         Name: *const c_char,
     ) -> Option<&'a Value>;
-    pub fn LLVMRustAddHandler<'a>(CatchSwitch: &'a Value, Handler: &'a BasicBlock);
+    pub fn LLVMAddHandler<'a>(CatchSwitch: &'a Value, Dest: &'a BasicBlock);
     pub fn LLVMSetPersonalityFn<'a>(Func: &'a Value, Pers: &'a Value);
 
     // Add a case to the switch instruction
@@ -1627,11 +1634,12 @@ extern "C" {
         DestTy: &'a Type,
         Name: *const c_char,
     ) -> &'a Value;
-    pub fn LLVMRustBuildIntCast<'a>(
+    pub fn LLVMBuildIntCast2<'a>(
         B: &Builder<'a>,
         Val: &'a Value,
         DestTy: &'a Type,
-        IsSigned: bool,
+        IsSigned: Bool,
+        Name: *const c_char,
     ) -> &'a Value;
 
     // Comparisons
@@ -1920,7 +1928,7 @@ extern "C" {
     );
     pub fn LLVMRustHasModuleFlag(M: &Module, name: *const c_char, len: size_t) -> bool;
 
-    pub fn LLVMRustMetadataAsValue<'a>(C: &'a Context, MD: &'a Metadata) -> &'a Value;
+    pub fn LLVMMetadataAsValue<'a>(C: &'a Context, MD: &'a Metadata) -> &'a Value;
 
     pub fn LLVMRustDIBuilderCreate(M: &Module) -> &mut DIBuilder<'_>;
 

compiler/rustc_codegen_llvm/src/type_.rs

@@ -53,7 +53,7 @@ impl<'ll> CodegenCx<'ll, '_> {
     }
 
     pub(crate) fn type_metadata(&self) -> &'ll Type {
-        unsafe { llvm::LLVMRustMetadataTypeInContext(self.llcx) }
+        unsafe { llvm::LLVMMetadataTypeInContext(self.llcx) }
     }
 
     ///x Creates an integer type with the given number of bits, e.g., i24

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -152,10 +152,6 @@ LLVMRustInsertPrivateGlobal(LLVMModuleRef M, LLVMTypeRef Ty) {
                                  nullptr));
 }
 
-extern "C" LLVMTypeRef LLVMRustMetadataTypeInContext(LLVMContextRef C) {
-  return wrap(Type::getMetadataTy(*unwrap(C)));
-}
-
 static Attribute::AttrKind fromRust(LLVMRustAttribute Kind) {
   switch (Kind) {
   case AlwaysInline:
@@ -480,11 +476,6 @@ extern "C" bool LLVMRustInlineAsmVerify(LLVMTypeRef Ty, char *Constraints,
 #endif
 }
 
-extern "C" void LLVMRustAppendModuleInlineAsm(LLVMModuleRef M, const char *Asm,
-                                              size_t AsmLen) {
-  unwrap(M)->appendModuleInlineAsm(StringRef(Asm, AsmLen));
-}
-
 typedef DIBuilder *LLVMRustDIBuilderRef;
 
 template <typename DIT> DIT *unwrapDIPtr(LLVMMetadataRef Ref) {
@@ -753,10 +744,6 @@ extern "C" bool LLVMRustHasModuleFlag(LLVMModuleRef M, const char *Name,
   return unwrap(M)->getModuleFlag(StringRef(Name, Len)) != nullptr;
 }
 
-extern "C" LLVMValueRef LLVMRustMetadataAsValue(LLVMContextRef C, LLVMMetadataRef MD) {
-  return wrap(MetadataAsValue::get(*unwrap(C), unwrap(MD)));
-}
-
 extern "C" void LLVMRustGlobalAddMetadata(
     LLVMValueRef Global, unsigned Kind, LLVMMetadataRef MD) {
   unwrap<GlobalObject>(Global)->addMetadata(Kind, *unwrap<MDNode>(MD));
@@ -1153,6 +1140,8 @@ extern "C" void LLVMRustWriteValueToString(LLVMValueRef V,
 }
 
 // LLVMArrayType function does not support 64-bit ElementCount
+// FIXME: replace with LLVMArrayType2 when bumped minimal version to llvm-17
+// https://github.com/llvm/llvm-project/commit/35276f16e5a2cae0dfb49c0fbf874d4d2f177acc
 extern "C" LLVMTypeRef LLVMRustArrayType(LLVMTypeRef ElementTy,
                                          uint64_t ElementCount) {
   return wrap(ArrayType::get(unwrap(ElementTy), ElementCount));
@@ -1408,61 +1397,6 @@ extern "C" bool LLVMRustUnpackSMDiagnostic(LLVMSMDiagnosticRef DRef,
   return true;
 }
 
-extern "C" LLVMValueRef LLVMRustBuildCleanupPad(LLVMBuilderRef B,
-                                                LLVMValueRef ParentPad,
-                                                unsigned ArgCount,
-                                                LLVMValueRef *LLArgs,
-                                                const char *Name) {
-  Value **Args = unwrap(LLArgs);
-  if (ParentPad == nullptr) {
-    Type *Ty = Type::getTokenTy(unwrap(B)->getContext());
-    ParentPad = wrap(Constant::getNullValue(Ty));
-  }
-  return wrap(unwrap(B)->CreateCleanupPad(
-      unwrap(ParentPad), ArrayRef<Value *>(Args, ArgCount), Name));
-}
-
-extern "C" LLVMValueRef LLVMRustBuildCleanupRet(LLVMBuilderRef B,
-                                                LLVMValueRef CleanupPad,
-                                                LLVMBasicBlockRef UnwindBB) {
-  CleanupPadInst *Inst = cast<CleanupPadInst>(unwrap(CleanupPad));
-  return wrap(unwrap(B)->CreateCleanupRet(Inst, unwrap(UnwindBB)));
-}
-
-extern "C" LLVMValueRef
-LLVMRustBuildCatchPad(LLVMBuilderRef B, LLVMValueRef ParentPad,
-                      unsigned ArgCount, LLVMValueRef *LLArgs, const char *Name) {
-  Value **Args = unwrap(LLArgs);
-  return wrap(unwrap(B)->CreateCatchPad(
-      unwrap(ParentPad), ArrayRef<Value *>(Args, ArgCount), Name));
-}
-
-extern "C" LLVMValueRef LLVMRustBuildCatchRet(LLVMBuilderRef B,
-                                              LLVMValueRef Pad,
-                                              LLVMBasicBlockRef BB) {
-  return wrap(unwrap(B)->CreateCatchRet(cast<CatchPadInst>(unwrap(Pad)),
-                                              unwrap(BB)));
-}
-
-extern "C" LLVMValueRef LLVMRustBuildCatchSwitch(LLVMBuilderRef B,
-                                                 LLVMValueRef ParentPad,
-                                                 LLVMBasicBlockRef BB,
-                                                 unsigned NumHandlers,
-                                                 const char *Name) {
-  if (ParentPad == nullptr) {
-    Type *Ty = Type::getTokenTy(unwrap(B)->getContext());
-    ParentPad = wrap(Constant::getNullValue(Ty));
-  }
-  return wrap(unwrap(B)->CreateCatchSwitch(unwrap(ParentPad), unwrap(BB),
-                                                 NumHandlers, Name));
-}
-
-extern "C" void LLVMRustAddHandler(LLVMValueRef CatchSwitchRef,
-                                   LLVMBasicBlockRef Handler) {
-  Value *CatchSwitch = unwrap(CatchSwitchRef);
-  cast<CatchSwitchInst>(CatchSwitch)->addHandler(unwrap(Handler));
-}
-
 extern "C" OperandBundleDef *LLVMRustBuildOperandBundleDef(const char *Name,
                                                            LLVMValueRef *Inputs,
                                                            unsigned NumInputs) {
@@ -1627,6 +1561,7 @@ extern "C" void LLVMRustSetLinkage(LLVMValueRef V,
   LLVMSetLinkage(V, fromRust(RustLinkage));
 }
 
+// FIXME: replace with LLVMConstInBoundsGEP2 when bumped minimal version to llvm-14
 extern "C" LLVMValueRef LLVMRustConstInBoundsGEP2(LLVMTypeRef Ty,
                                                   LLVMValueRef ConstantVal,
                                                   LLVMValueRef *ConstantIndices,
@@ -1704,12 +1639,6 @@ extern "C" LLVMRustVisibility LLVMRustGetVisibility(LLVMValueRef V) {
   return toRust(LLVMGetVisibility(V));
 }
 
-// Oh hey, a binding that makes sense for once? (because LLVM’s own do not)
-extern "C" LLVMValueRef LLVMRustBuildIntCast(LLVMBuilderRef B, LLVMValueRef Val,
-                                             LLVMTypeRef DestTy, bool isSigned) {
-  return wrap(unwrap(B)->CreateIntCast(unwrap(Val), unwrap(DestTy), isSigned, ""));
-}
-
 extern "C" void LLVMRustSetVisibility(LLVMValueRef V,
                                       LLVMRustVisibility RustVisibility) {
   LLVMSetVisibility(V, fromRust(RustVisibility));