Use LLVMDIBuilderGetOrCreateSubrange

Author: Zalathar

compiler/rustc_codegen_llvm/src/debuginfo/metadata.rs

@@ -4,7 +4,7 @@ use std::hash::{Hash, Hasher};
 use std::path::{Path, PathBuf};
 use std::{iter, ptr};
 
-use libc::{c_char, c_longlong, c_uint};
+use libc::{c_char, c_uint};
 use rustc_abi::{Align, Size};
 use rustc_codegen_ssa::debuginfo::type_names::{VTableNameKind, cpp_like_debuginfo};
 use rustc_codegen_ssa::traits::*;
@@ -121,11 +121,16 @@ fn build_fixed_size_array_di_node<'ll, 'tcx>(
 
     let (size, align) = cx.size_and_align_of(array_type);
 
-    let upper_bound = len
-        .try_to_target_usize(cx.tcx)
-        .expect("expected monomorphic const in codegen") as c_longlong;
+    let upper_bound =
+        len.try_to_target_usize(cx.tcx).expect("expected monomorphic const in codegen");
 
-    let subrange = unsafe { llvm::LLVMRustDIBuilderGetOrCreateSubrange(DIB(cx), 0, upper_bound) };
+    let subrange = unsafe {
+        llvm::LLVMDIBuilderGetOrCreateSubrange(
+            DIB(cx),
+            /* LowerBound */ 0i64,
+            /* Count */ upper_bound as i64,
+        )
+    };
 
     let subscripts = &[subrange];
     let di_node = unsafe {

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -12,7 +12,7 @@ use rustc_target::spec::SymbolVisibility;
 use super::RustString;
 use super::debuginfo::{
     DIArray, DIBuilder, DIDerivedType, DIDescriptor, DIEnumerator, DIFile, DIFlags,
-    DIGlobalVariableExpression, DILocation, DISPFlags, DIScope, DISubprogram, DISubrange,
+    DIGlobalVariableExpression, DILocation, DISPFlags, DIScope, DISubprogram,
     DITemplateTypeParameter, DIType, DIVariable, DebugEmissionKind, DebugNameTableKind,
 };
 use crate::llvm;
@@ -1772,6 +1772,12 @@ unsafe extern "C" {
         Scope: Option<&'ll Metadata>,
         AlignInBits: u32, // (optional; default is 0)
     ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderGetOrCreateSubrange<'ll>(
+        Builder: &DIBuilder<'ll>,
+        LowerBound: i64,
+        Count: i64,
+    ) -> &'ll Metadata;
 }
 
 #[link(name = "llvm-wrapper", kind = "static")]
@@ -2150,12 +2156,6 @@ unsafe extern "C" {
         AlignInBits: u32,
     ) -> &'a DIVariable;
 
-    pub fn LLVMRustDIBuilderGetOrCreateSubrange<'a>(
-        Builder: &DIBuilder<'a>,
-        Lo: i64,
-        Count: i64,
-    ) -> &'a DISubrange;
-
     pub fn LLVMRustDIBuilderGetOrCreateArray<'a>(
         Builder: &DIBuilder<'a>,
         Ptr: *const Option<&'a DIDescriptor>,

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1058,12 +1058,6 @@ extern "C" LLVMMetadataRef LLVMRustDIBuilderCreateVariable(
   }
 }
 
-extern "C" LLVMMetadataRef
-LLVMRustDIBuilderGetOrCreateSubrange(LLVMRustDIBuilderRef Builder, int64_t Lo,
-                                     int64_t Count) {
-  return wrap(Builder->getOrCreateSubrange(Lo, Count));
-}
-
 extern "C" LLVMMetadataRef
 LLVMRustDIBuilderGetOrCreateArray(LLVMRustDIBuilderRef Builder,
                                   LLVMMetadataRef *Ptr, unsigned Count) {