Auto merge of rust-lang#130389 - Luv-Ray:LLVMMDNodeInContext2, r=nikic

llvm: replace some deprecated functions

`LLVMMDStringInContext` and `LLVMMDNodeInContext` are deprecated, replace them with `LLVMMDStringInContext2` and `LLVMMDNodeInContext2`.
Also replace `Value` with `Metadata` in some function signatures for better consistency.

Author: bors

compiler/rustc_codegen_gcc/src/builder.rs

@@ -500,6 +500,7 @@ impl<'a, 'gcc, 'tcx> Deref for Builder<'a, 'gcc, 'tcx> {
 
 impl<'gcc, 'tcx> BackendTypes for Builder<'_, 'gcc, 'tcx> {
     type Value = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Value;
+    type Metadata = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Metadata;
     type Function = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Function;
     type BasicBlock = <CodegenCx<'gcc, 'tcx> as BackendTypes>::BasicBlock;
     type Type = <CodegenCx<'gcc, 'tcx> as BackendTypes>::Type;

compiler/rustc_codegen_gcc/src/context.rs

@@ -414,6 +414,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
 
 impl<'gcc, 'tcx> BackendTypes for CodegenCx<'gcc, 'tcx> {
     type Value = RValue<'gcc>;
+    type Metadata = RValue<'gcc>;
     type Function = RValue<'gcc>;
 
     type BasicBlock = Block<'gcc>;

compiler/rustc_codegen_llvm/src/asm.rs

@@ -504,10 +504,15 @@ pub(crate) fn inline_asm_call<'ll>(
                 // due to the asm template string coming from a macro. LLVM will
                 // default to the first srcloc for lines that don't have an
                 // associated srcloc.
-                srcloc.push(bx.const_i32(0));
+                srcloc.push(llvm::LLVMValueAsMetadata(bx.const_i32(0)));
             }
-            srcloc.extend(line_spans.iter().map(|span| bx.const_i32(span.lo().to_u32() as i32)));
-            let md = llvm::LLVMMDNodeInContext(bx.llcx, srcloc.as_ptr(), srcloc.len() as u32);
+            srcloc.extend(
+                line_spans
+                    .iter()
+                    .map(|span| llvm::LLVMValueAsMetadata(bx.const_i32(span.lo().to_u32() as i32))),
+            );
+            let md = llvm::LLVMMDNodeInContext2(bx.llcx, srcloc.as_ptr(), srcloc.len());
+            let md = llvm::LLVMMetadataAsValue(&bx.llcx, md);
             llvm::LLVMSetMetadata(call, kind, md);
 
             Some(call)

compiler/rustc_codegen_llvm/src/builder.rs

@@ -56,6 +56,7 @@ const UNNAMED: *const c_char = c"".as_ptr();
 
 impl<'ll, 'tcx> BackendTypes for Builder<'_, 'll, 'tcx> {
     type Value = <CodegenCx<'ll, 'tcx> as BackendTypes>::Value;
+    type Metadata = <CodegenCx<'ll, 'tcx> as BackendTypes>::Metadata;
     type Function = <CodegenCx<'ll, 'tcx> as BackendTypes>::Function;
     type BasicBlock = <CodegenCx<'ll, 'tcx> as BackendTypes>::BasicBlock;
     type Type = <CodegenCx<'ll, 'tcx> as BackendTypes>::Type;
@@ -677,26 +678,19 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
         unsafe {
             let llty = self.cx.val_ty(load);
-            let v = [
-                self.cx.const_uint_big(llty, range.start),
-                self.cx.const_uint_big(llty, range.end.wrapping_add(1)),
+            let md = [
+                llvm::LLVMValueAsMetadata(self.cx.const_uint_big(llty, range.start)),
+                llvm::LLVMValueAsMetadata(self.cx.const_uint_big(llty, range.end.wrapping_add(1))),
             ];
-
-            llvm::LLVMSetMetadata(
-                load,
-                llvm::MD_range as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, v.as_ptr(), v.len() as c_uint),
-            );
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, md.as_ptr(), md.len());
+            self.set_metadata(load, llvm::MD_range, md);
         }
     }
 
     fn nonnull_metadata(&mut self, load: &'ll Value) {
         unsafe {
-            llvm::LLVMSetMetadata(
-                load,
-                llvm::MD_nonnull as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
-            );
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, ptr::null(), 0);
+            self.set_metadata(load, llvm::MD_nonnull, md);
         }
     }
 
@@ -744,9 +738,9 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
                     // *always* point to a metadata value of the integer 1.
                     //
                     // [1]: https://llvm.org/docs/LangRef.html#store-instruction
-                    let one = self.cx.const_i32(1);
-                    let node = llvm::LLVMMDNodeInContext(self.cx.llcx, &one, 1);
-                    llvm::LLVMSetMetadata(store, llvm::MD_nontemporal as c_uint, node);
+                    let one = llvm::LLVMValueAsMetadata(self.cx.const_i32(1));
+                    let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, &one, 1);
+                    self.set_metadata(store, llvm::MD_nontemporal, md);
                 }
             }
             store
@@ -1210,11 +1204,8 @@ impl<'a, 'll, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'll, 'tcx> {
 
     fn set_invariant_load(&mut self, load: &'ll Value) {
         unsafe {
-            llvm::LLVMSetMetadata(
-                load,
-                llvm::MD_invariant_load as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
-            );
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, ptr::null(), 0);
+            self.set_metadata(load, llvm::MD_invariant_load, md);
         }
     }
 
@@ -1343,33 +1334,23 @@ impl<'a, 'll, 'tcx> Builder<'a, 'll, 'tcx> {
 
     fn align_metadata(&mut self, load: &'ll Value, align: Align) {
         unsafe {
-            let v = [self.cx.const_u64(align.bytes())];
-
-            llvm::LLVMSetMetadata(
-                load,
-                llvm::MD_align as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, v.as_ptr(), v.len() as c_uint),
-            );
+            let md = [llvm::LLVMValueAsMetadata(self.cx.const_u64(align.bytes()))];
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, md.as_ptr(), md.len());
+            self.set_metadata(load, llvm::MD_align, md);
         }
     }
 
     fn noundef_metadata(&mut self, load: &'ll Value) {
         unsafe {
-            llvm::LLVMSetMetadata(
-                load,
-                llvm::MD_noundef as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
-            );
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, ptr::null(), 0);
+            self.set_metadata(load, llvm::MD_noundef, md);
         }
     }
 
     pub(crate) fn set_unpredictable(&mut self, inst: &'ll Value) {
         unsafe {
-            llvm::LLVMSetMetadata(
-                inst,
-                llvm::MD_unpredictable as c_uint,
-                llvm::LLVMMDNodeInContext(self.cx.llcx, ptr::null(), 0),
-            );
+            let md = llvm::LLVMMDNodeInContext2(self.cx.llcx, ptr::null(), 0);
+            self.set_metadata(inst, llvm::MD_unpredictable, md);
         }
     }
 

compiler/rustc_codegen_llvm/src/common.rs

@@ -14,7 +14,7 @@ use tracing::debug;
 
 use crate::consts::const_alloc_to_llvm;
 pub(crate) use crate::context::CodegenCx;
-use crate::llvm::{self, BasicBlock, Bool, ConstantInt, False, OperandBundleDef, True};
+use crate::llvm::{self, BasicBlock, Bool, ConstantInt, False, Metadata, OperandBundleDef, True};
 use crate::type_::Type;
 use crate::value::Value;
 
@@ -79,6 +79,7 @@ impl<'ll> Funclet<'ll> {
 
 impl<'ll> BackendTypes for CodegenCx<'ll, '_> {
     type Value = &'ll Value;
+    type Metadata = &'ll Metadata;
     // FIXME(eddyb) replace this with a `Function` "subclass" of `Value`.
     type Function = &'ll Value;
 

compiler/rustc_codegen_llvm/src/context.rs

@@ -1,9 +1,8 @@
 use std::borrow::Borrow;
 use std::cell::{Cell, RefCell};
-use std::ffi::CStr;
+use std::ffi::{c_uint, CStr};
 use std::str;
 
-use libc::c_uint;
 use rustc_codegen_ssa::base::{wants_msvc_seh, wants_wasm_eh};
 use rustc_codegen_ssa::errors as ssa_errors;
 use rustc_codegen_ssa::traits::*;
@@ -31,6 +30,7 @@ use smallvec::SmallVec;
 use crate::back::write::to_llvm_code_model;
 use crate::callee::get_fn;
 use crate::debuginfo::metadata::apply_vcall_visibility_metadata;
+use crate::llvm::{Metadata, MetadataType};
 use crate::type_::Type;
 use crate::value::Value;
 use crate::{attributes, coverageinfo, debuginfo, llvm, llvm_util};
@@ -403,17 +403,17 @@ pub(crate) unsafe fn create_module<'ll>(
     let rustc_producer =
         format!("rustc version {}", option_env!("CFG_VERSION").expect("CFG_VERSION"));
     let name_metadata = unsafe {
-        llvm::LLVMMDStringInContext(
+        llvm::LLVMMDStringInContext2(
             llcx,
             rustc_producer.as_ptr().cast(),
-            rustc_producer.as_bytes().len() as c_uint,
+            rustc_producer.as_bytes().len(),
         )
     };
     unsafe {
         llvm::LLVMAddNamedMetadataOperand(
             llmod,
             c"llvm.ident".as_ptr(),
-            llvm::LLVMMDNodeInContext(llcx, &name_metadata, 1),
+            &llvm::LLVMMetadataAsValue(llcx, llvm::LLVMMDNodeInContext2(llcx, &name_metadata, 1)),
         );
     }
 
@@ -1118,6 +1118,14 @@ impl CodegenCx<'_, '_> {
         name.push_str(&(idx as u64).to_base(ALPHANUMERIC_ONLY));
         name
     }
+
+    /// A wrapper for [`llvm::LLVMSetMetadata`], but it takes `Metadata` as a parameter instead of `Value`.
+    pub(crate) fn set_metadata<'a>(&self, val: &'a Value, kind_id: MetadataType, md: &'a Metadata) {
+        unsafe {
+            let node = llvm::LLVMMetadataAsValue(&self.llcx, md);
+            llvm::LLVMSetMetadata(val, kind_id as c_uint, node);
+        }
+    }
 }
 
 impl HasDataLayout for CodegenCx<'_, '_> {

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -1545,20 +1545,16 @@ pub(crate) fn apply_vcall_visibility_metadata<'ll, 'tcx>(
     let trait_ref_typeid = typeid_for_trait_ref(cx.tcx, trait_ref);
 
     unsafe {
-        let typeid = llvm::LLVMMDStringInContext(
+        let typeid = llvm::LLVMMDStringInContext2(
             cx.llcx,
             trait_ref_typeid.as_ptr() as *const c_char,
-            trait_ref_typeid.as_bytes().len() as c_uint,
+            trait_ref_typeid.as_bytes().len(),
         );
-        let v = [cx.const_usize(0), typeid];
+        let v = [llvm::LLVMValueAsMetadata(cx.const_usize(0)), typeid];
         llvm::LLVMRustGlobalAddMetadata(
             vtable,
             llvm::MD_type as c_uint,
-            llvm::LLVMValueAsMetadata(llvm::LLVMMDNodeInContext(
-                cx.llcx,
-                v.as_ptr(),
-                v.len() as c_uint,
-            )),
+            llvm::LLVMMDNodeInContext2(cx.llcx, v.as_ptr(), v.len()),
         );
         let vcall_visibility = llvm::LLVMValueAsMetadata(cx.const_u64(vcall_visibility as u64));
         let vcall_visibility_metadata = llvm::LLVMMDNodeInContext2(cx.llcx, &vcall_visibility, 1);

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -20,7 +20,7 @@ use tracing::debug;
 use crate::abi::{Abi, FnAbi, FnAbiLlvmExt, LlvmType, PassMode};
 use crate::builder::Builder;
 use crate::context::CodegenCx;
-use crate::llvm;
+use crate::llvm::{self, Metadata};
 use crate::type_::Type;
 use crate::type_of::LayoutLlvmExt;
 use crate::va_arg::emit_va_arg;
@@ -616,18 +616,20 @@ impl<'ll, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'_, 'll, 'tcx> {
         }
     }
 
-    fn type_test(&mut self, pointer: Self::Value, typeid: Self::Value) -> Self::Value {
+    fn type_test(&mut self, pointer: Self::Value, typeid: Self::Metadata) -> Self::Value {
         // Test the called operand using llvm.type.test intrinsic. The LowerTypeTests link-time
         // optimization pass replaces calls to this intrinsic with code to test type membership.
+        let typeid = unsafe { llvm::LLVMMetadataAsValue(&self.llcx, typeid) };
         self.call_intrinsic("llvm.type.test", &[pointer, typeid])
     }
 
     fn type_checked_load(
         &mut self,
         llvtable: &'ll Value,
         vtable_byte_offset: u64,
-        typeid: &'ll Value,
+        typeid: &'ll Metadata,
     ) -> Self::Value {
+        let typeid = unsafe { llvm::LLVMMetadataAsValue(&self.llcx, typeid) };
         let vtable_byte_offset = self.const_i32(vtable_byte_offset as i32);
         let type_checked_load =
             self.call_intrinsic("llvm.type.checked.load", &[llvtable, vtable_byte_offset, typeid]);

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -912,17 +912,7 @@ unsafe 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,
-        Count: c_uint,
-    ) -> &'a Value;
     pub fn LLVMMDNodeInContext2<'a>(
         C: &'a Context,
         Vals: *const &'a Metadata,

compiler/rustc_codegen_llvm/src/type_.rs

@@ -13,7 +13,7 @@ use rustc_target::abi::{AddressSpace, Align, Integer, Size};
 use crate::abi::{FnAbiLlvmExt, LlvmType};
 use crate::context::CodegenCx;
 pub(crate) use crate::llvm::Type;
-use crate::llvm::{Bool, False, True};
+use crate::llvm::{Bool, False, Metadata, True};
 use crate::type_of::LayoutLlvmExt;
 use crate::value::Value;
 use crate::{common, llvm};
@@ -283,43 +283,31 @@ impl<'ll, 'tcx> LayoutTypeCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
 impl<'ll, 'tcx> TypeMembershipCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
     fn add_type_metadata(&self, function: &'ll Value, typeid: String) {
         let typeid_metadata = self.typeid_metadata(typeid).unwrap();
-        let v = [self.const_usize(0), typeid_metadata];
         unsafe {
+            let v = [llvm::LLVMValueAsMetadata(self.const_usize(0)), typeid_metadata];
             llvm::LLVMRustGlobalAddMetadata(
                 function,
                 llvm::MD_type as c_uint,
-                llvm::LLVMValueAsMetadata(llvm::LLVMMDNodeInContext(
-                    self.llcx,
-                    v.as_ptr(),
-                    v.len() as c_uint,
-                )),
+                llvm::LLVMMDNodeInContext2(self.llcx, v.as_ptr(), v.len()),
             )
         }
     }
 
     fn set_type_metadata(&self, function: &'ll Value, typeid: String) {
         let typeid_metadata = self.typeid_metadata(typeid).unwrap();
-        let v = [self.const_usize(0), typeid_metadata];
         unsafe {
+            let v = [llvm::LLVMValueAsMetadata(self.const_usize(0)), typeid_metadata];
             llvm::LLVMGlobalSetMetadata(
                 function,
                 llvm::MD_type as c_uint,
-                llvm::LLVMValueAsMetadata(llvm::LLVMMDNodeInContext(
-                    self.llcx,
-                    v.as_ptr(),
-                    v.len() as c_uint,
-                )),
+                llvm::LLVMMDNodeInContext2(self.llcx, v.as_ptr(), v.len()),
             )
         }
     }
 
-    fn typeid_metadata(&self, typeid: String) -> Option<&'ll Value> {
+    fn typeid_metadata(&self, typeid: String) -> Option<&'ll Metadata> {
         Some(unsafe {
-            llvm::LLVMMDStringInContext(
-                self.llcx,
-                typeid.as_ptr() as *const c_char,
-                typeid.len() as c_uint,
-            )
+            llvm::LLVMMDStringInContext2(self.llcx, typeid.as_ptr() as *const c_char, typeid.len())
         })
     }
 

compiler/rustc_codegen_ssa/src/traits/backend.rs

@@ -21,6 +21,7 @@ use crate::{CodegenResults, ModuleCodegen};
 
 pub trait BackendTypes {
     type Value: CodegenObject;
+    type Metadata: CodegenObject;
     type Function: CodegenObject;
 
     type BasicBlock: Copy;

compiler/rustc_codegen_ssa/src/traits/builder.rs

@@ -51,6 +51,7 @@ pub trait BuilderMethods<'a, 'tcx>:
     type CodegenCx: CodegenMethods<
             'tcx,
             Value = Self::Value,
+            Metadata = Self::Metadata,
             Function = Self::Function,
             BasicBlock = Self::BasicBlock,
             Type = Self::Type,

compiler/rustc_codegen_ssa/src/traits/intrinsic.rs

@@ -24,14 +24,14 @@ pub trait IntrinsicCallBuilderMethods<'tcx>: BackendTypes {
     fn assume(&mut self, val: Self::Value);
     fn expect(&mut self, cond: Self::Value, expected: bool) -> Self::Value;
     /// Trait method used to test whether a given pointer is associated with a type identifier.
-    fn type_test(&mut self, pointer: Self::Value, typeid: Self::Value) -> Self::Value;
+    fn type_test(&mut self, pointer: Self::Value, typeid: Self::Metadata) -> Self::Value;
     /// Trait method used to load a function while testing if it is associated with a type
     /// identifier.
     fn type_checked_load(
         &mut self,
         llvtable: Self::Value,
         vtable_byte_offset: u64,
-        typeid: Self::Value,
+        typeid: Self::Metadata,
     ) -> Self::Value;
     /// Trait method used to inject `va_start` on the "spoofed" `VaListImpl` in
     /// Rust defined C-variadic functions.

compiler/rustc_codegen_ssa/src/traits/type_.rs

@@ -152,7 +152,7 @@ pub trait LayoutTypeCodegenMethods<'tcx>: BackendTypes {
 pub trait TypeMembershipCodegenMethods<'tcx>: BackendTypes {
     fn add_type_metadata(&self, _function: Self::Function, _typeid: String) {}
     fn set_type_metadata(&self, _function: Self::Function, _typeid: String) {}
-    fn typeid_metadata(&self, _typeid: String) -> Option<Self::Value> {
+    fn typeid_metadata(&self, _typeid: String) -> Option<Self::Metadata> {
         None
     }
     fn add_kcfi_type_metadata(&self, _function: Self::Function, _typeid: u32) {}