Use LLVMDIBuilderCreateDebugLocation

The LLVM-C binding takes an explicit context, whereas our binding obtained the
context from the scope argument.

Author: Zalathar

compiler/rustc_codegen_llvm/src/debuginfo/mod.rs

@@ -574,7 +574,7 @@ impl<'ll, 'tcx> DebugInfoCodegenMethods<'tcx> for CodegenCx<'ll, 'tcx> {
             (line, col)
         };
 
-        unsafe { llvm::LLVMRustDIBuilderCreateDebugLocation(line, col, scope, inlined_at) }
+        unsafe { llvm::LLVMDIBuilderCreateDebugLocation(self.llcx, line, col, scope, inlined_at) }
     }
 
     fn create_vtable_debuginfo(

compiler/rustc_codegen_llvm/src/llvm/ffi.rs

@@ -1740,6 +1740,14 @@ unsafe extern "C" {
         File: &'ll Metadata,
         Discriminator: c_uint, // (optional "DWARF path discriminator"; default is 0)
     ) -> &'ll Metadata;
+
+    pub(crate) fn LLVMDIBuilderCreateDebugLocation<'ll>(
+        Ctx: &'ll Context,
+        Line: c_uint,
+        Column: c_uint,
+        Scope: &'ll Metadata,
+        InlinedAt: Option<&'ll Metadata>,
+    ) -> &'ll Metadata;
 }
 
 #[link(name = "llvm-wrapper", kind = "static")]
@@ -2302,12 +2310,6 @@ unsafe extern "C" {
         Params: Option<&'a DIArray>,
     );
 
-    pub fn LLVMRustDIBuilderCreateDebugLocation<'a>(
-        Line: c_uint,
-        Column: c_uint,
-        Scope: &'a DIScope,
-        InlinedAt: Option<&'a DILocation>,
-    ) -> &'a DILocation;
     pub fn LLVMRustDILocationCloneWithBaseDiscriminator<'a>(
         Location: &'a DILocation,
         BD: c_uint,

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1315,16 +1315,6 @@ extern "C" void LLVMRustDICompositeTypeReplaceArrays(
                                  DINodeArray(unwrap<MDTuple>(Params)));
 }
 
-extern "C" LLVMMetadataRef
-LLVMRustDIBuilderCreateDebugLocation(unsigned Line, unsigned Column,
-                                     LLVMMetadataRef ScopeRef,
-                                     LLVMMetadataRef InlinedAt) {
-  MDNode *Scope = unwrapDIPtr<MDNode>(ScopeRef);
-  DILocation *Loc = DILocation::get(Scope->getContext(), Line, Column, Scope,
-                                    unwrapDIPtr<MDNode>(InlinedAt));
-  return wrap(Loc);
-}
-
 extern "C" LLVMMetadataRef
 LLVMRustDILocationCloneWithBaseDiscriminator(LLVMMetadataRef Location,
                                              unsigned BD) {